Named Openings

ECO: A00
Opening Name: Amar Opening
SAN: 1. Nh3
UCI: g1h3
FEN: rnbqkbnr/pppppppp/8/8/8/7N/PPPPPPPP/RNBQKB1R b KQkq –

ECO: A00
Opening Name: Amar Opening: Paris Gambit
SAN: 1. Nh3 d5 2. g3 e5 3. f4
UCI: g1h3 d7d5 g2g3 e7e5 f2f4
FEN: rnbqkbnr/ppp2ppp/8/3pp3/5P2/6PN/PPPPP2P/RNBQKB1R b KQkq –

ECO: A00
Opening Name: Amar Opening: Paris Gambit, Gent Gambit
SAN: 1. Nh3 d5 2. g3 e5 3. f4 Bxh3 4. Bxh3 exf4 5. O-O fxg3 6. hxg3
UCI: g1h3 d7d5 g2g3 e7e5 f2f4 c8h3 f1h3 e5f4 e1g1 f4g3 h2g3
FEN: rn1qkbnr/ppp2ppp/8/3p4/8/6PB/PPPPP3/RNBQ1RK1 b kq –

ECO: A00
Opening Name: Amsterdam Attack
SAN: 1. e3 e5 2. c4 d6 3. Nc3 Nc6 4. b3 Nf6
UCI: e2e3 e7e5 c2c4 d7d6 b1c3 b8c6 b2b3 g8f6
FEN: r1bqkb1r/ppp2ppp/2np1n2/4p3/2P5/1PN1P3/P2P1PPP/R1BQKBNR w KQkq –

ECO: A00
Opening Name: Anderssen’s Opening
SAN: 1. a3
UCI: a2a3
FEN: rnbqkbnr/pppppppp/8/8/8/P7/1PPPPPPP/RNBQKBNR b KQkq –

ECO: A00
Opening Name: Anderssen’s Opening: Polish Gambit
SAN: 1. a3 a5 2. b4
UCI: a2a3 a7a5 b2b4
FEN: rnbqkbnr/1ppppppp/8/p7/1P6/P7/2PPPPPP/RNBQKBNR b KQkq –

ECO: A00
Opening Name: Barnes Opening
SAN: 1. f3
UCI: f2f3
FEN: rnbqkbnr/pppppppp/8/8/8/5P2/PPPPP1PP/RNBQKBNR b KQkq –

ECO: A00
Opening Name: Barnes Opening: Fool’s Mate
SAN: 1. f3 e5 2. g4 Qh4#
UCI: f2f3 e7e5 g2g4 d8h4
FEN: rnb1kbnr/pppp1ppp/8/4p3/6Pq/5P2/PPPPP2P/RNBQKBNR w KQkq –

ECO: A00
Opening Name: Barnes Opening: Gedult Gambit
SAN: 1. f3 d5 2. e4 g6 3. d4 dxe4 4. c3
UCI: f2f3 d7d5 e2e4 g7g6 d2d4 d5e4 c2c3
FEN: rnbqkbnr/ppp1pp1p/6p1/8/3Pp3/2P2P2/PP4PP/RNBQKBNR b KQkq –

ECO: A00
Opening Name: Barnes Opening: Gedult Gambit
SAN: 1. f3 f5 2. e4 fxe4 3. Nc3
UCI: f2f3 f7f5 e2e4 f5e4 b1c3
FEN: rnbqkbnr/ppppp1pp/8/8/4p3/2N2P2/PPPP2PP/R1BQKBNR b KQkq –

ECO: A00
Opening Name: Barnes Opening: Hammerschlag
SAN: 1. f3 e5 2. Kf2
UCI: f2f3 e7e5 e1f2
FEN: rnbqkbnr/pppp1ppp/8/4p3/8/5P2/PPPPPKPP/RNBQ1BNR b kq –

ECO: A00
Opening Name: Clemenz Opening
SAN: 1. h3
UCI: h2h3
FEN: rnbqkbnr/pppppppp/8/8/8/7P/PPPPPPP1/RNBQKBNR b KQkq –

ECO: A00
Opening Name: Clemenz Opening: Spike Lee Gambit
SAN: 1. h3 h5 2. g4
UCI: h2h3 h7h5 g2g4
FEN: rnbqkbnr/ppppppp1/8/7p/6P1/7P/PPPPPP2/RNBQKBNR b KQkq –

ECO: A00
Opening Name: Creepy Crawly Formation: Classical Defense
SAN: 1. h3 d5 2. a3 e5
UCI: h2h3 d7d5 a2a3 e7e5
FEN: rnbqkbnr/ppp2ppp/8/3pp3/8/P6P/1PPPPPP1/RNBQKBNR w KQkq –

ECO: A00
Opening Name: Formation: Hippopotamus Attack
SAN: 1. a3 e5 2. b3 d5 3. c3 Nf6 4. d3 Nc6 5. e3 Bd6 6. f3 O-O 7. g3
UCI: a2a3 e7e5 b2b3 d7d5 c2c3 g8f6 d2d3 b8c6 e2e3 f8d6 f2f3 e8g8 g2g3
FEN: r1bq1rk1/ppp2ppp/2nb1n2/3pp3/8/PPPPPPP1/7P/RNBQKBNR b KQ –

ECO: A00
Opening Name: Formation: Shy Attack
SAN: 1. a3 e5 2. g3 d5 3. Bg2 Nf6 4. d3 Nc6 5. Nd2 Bd6 6. e3 O-O 7. h3
UCI: a2a3 e7e5 g2g3 d7d5 f1g2 g8f6 d2d3 b8c6 b1d2 f8d6 e2e3 e8g8 h2h3
FEN: r1bq1rk1/ppp2ppp/2nb1n2/3pp3/8/P2PP1PP/1PPN1PB1/R1BQK1NR b KQ –

ECO: A00
Opening Name: Global Opening
SAN: 1. h3 e5 2. a3
UCI: h2h3 e7e5 a2a3
FEN: rnbqkbnr/pppp1ppp/8/4p3/8/P6P/1PPPPPP1/RNBQKBNR b KQkq –

ECO: A00
Opening Name: Grob Opening
SAN: 1. g4
UCI: g2g4
FEN: rnbqkbnr/pppppppp/8/8/6P1/8/PPPPPP1P/RNBQKBNR b KQkq –

ECO: A00
Opening Name: Grob Opening: Alessi Gambit
SAN: 1. g4 f5
UCI: g2g4 f7f5
FEN: rnbqkbnr/ppppp1pp/8/5p2/6P1/8/PPPPPP1P/RNBQKBNR w KQkq –

ECO: A00
Opening Name: Grob Opening: Double Grob
SAN: 1. g4 g5
UCI: g2g4 g7g5
FEN: rnbqkbnr/pppppp1p/8/6p1/6P1/8/PPPPPP1P/RNBQKBNR w KQkq –

ECO: A00
Opening Name: Grob Opening: Double Grob, Coca-Cola Gambit
SAN: 1. g4 g5 2. f4
UCI: g2g4 g7g5 f2f4
FEN: rnbqkbnr/pppppp1p/8/6p1/5PP1/8/PPPPP2P/RNBQKBNR b KQkq –

ECO: A00
Opening Name: Grob Opening: Grob Gambit
SAN: 1. g4 d5 2. Bg2
UCI: g2g4 d7d5 f1g2
FEN: rnbqkbnr/ppp1pppp/8/3p4/6P1/8/PPPPPPBP/RNBQK1NR b KQkq –

ECO: A00
Opening Name: Grob Opening: Grob Gambit Declined
SAN: 1. g4 d5 2. Bg2 c6
UCI: g2g4 d7d5 f1g2 c7c6
FEN: rnbqkbnr/pp2pppp/2p5/3p4/6P1/8/PPPPPPBP/RNBQK1NR w KQkq –

ECO: A00
Opening Name: Grob Opening: Grob Gambit, Basman Gambit
SAN: 1. g4 d5 2. Bg2 h5 3. gxh5
UCI: g2g4 d7d5 f1g2 h7h5 g4h5
FEN: rnbqkbnr/ppp1ppp1/8/3p3P/8/8/PPPPPPBP/RNBQK1NR b KQkq –

ECO: A00
Opening Name: Grob Opening: Grob Gambit, Fritz Gambit
SAN: 1. g4 d5 2. Bg2 Bxg4 3. c4
UCI: g2g4 d7d5 f1g2 c8g4 c2c4
FEN: rn1qkbnr/ppp1pppp/8/3p4/2P3b1/8/PP1PPPBP/RNBQK1NR b KQkq –

ECO: A00
Opening Name: Grob Opening: Grob Gambit, Fritz Gambit, Romford Countergambit
SAN: 1. g4 d5 2. Bg2 Bxg4 3. c4 d4 4. Bxb7 Nd7 5. Bxa8 Qxa8
UCI: g2g4 d7d5 f1g2 c8g4 c2c4 d5d4 g2b7 b8d7 b7a8 d8a8
FEN: q3kbnr/p1pnpppp/8/8/2Pp2b1/8/PP1PPP1P/RNBQK1NR w KQk –

ECO: A00
Opening Name: Grob Opening: Grob Gambit, Keres Gambit
SAN: 1. g4 d5 2. Bg2 e5 3. d4 exd4 4. c3
UCI: g2g4 d7d5 f1g2 e7e5 d2d4 e5d4 c2c3
FEN: rnbqkbnr/ppp2ppp/8/3p4/3p2P1/2P5/PP2PPBP/RNBQK1NR b KQkq –

ECO: A00
Opening Name: Grob Opening: Grob Gambit, Richter-Grob Gambit
SAN: 1. g4 d5 2. Bg2 c6 3. c4 dxc4 4. b3
UCI: g2g4 d7d5 f1g2 c7c6 c2c4 d5c4 b2b3
FEN: rnbqkbnr/pp2pppp/2p5/8/2p3P1/1P6/P2PPPBP/RNBQK1NR b KQkq –

ECO: A00
Opening Name: Grob Opening: Keene Defense
SAN: 1. g4 d5 2. h3 e5 3. Bg2 c6
UCI: g2g4 d7d5 h2h3 e7e5 f1g2 c7c6
FEN: rnbqkbnr/pp3ppp/2p5/3pp3/6P1/7P/PPPPPPB1/RNBQK1NR w KQkq –

ECO: A00
Opening Name: Grob Opening: Keene Defense, Main Line
SAN: 1. g4 d5 2. h3 e5 3. Bg2 c6 4. d4 e4 5. c4 Bd6 6. Nc3 Ne7
UCI: g2g4 d7d5 h2h3 e7e5 f1g2 c7c6 d2d4 e5e4 c2c4 f8d6 b1c3 g8e7
FEN: rnbqk2r/pp2nppp/2pb4/3p4/2PPp1P1/2N4P/PP2PPB1/R1BQK1NR w KQkq –

ECO: A00
Opening Name: Grob Opening: London Defense
SAN: 1. g4 e5 2. h3 Nc6
UCI: g2g4 e7e5 h2h3 b8c6
FEN: r1bqkbnr/pppp1ppp/2n5/4p3/6P1/7P/PPPPPP2/RNBQKBNR w KQkq –

ECO: A00
Opening Name: Grob Opening: Romford Countergambit
SAN: 1. g4 d5 2. Bg2 Bxg4 3. c4 d4
UCI: g2g4 d7d5 f1g2 c8g4 c2c4 d5d4
FEN: rn1qkbnr/ppp1pppp/8/8/2Pp2b1/8/PP1PPPBP/RNBQK1NR w KQkq –

ECO: A00
Opening Name: Grob Opening: Spike Attack
SAN: 1. g4 d5 2. Bg2 c6 3. g5
UCI: g2g4 d7d5 f1g2 c7c6 g4g5
FEN: rnbqkbnr/pp2pppp/2p5/3p2P1/8/8/PPPPPPBP/RNBQK1NR b KQkq –

ECO: A00
Opening Name: Grob Opening: Spike, Hurst Attack
SAN: 1. g4 e5 2. Bg2 d5 3. c4
UCI: g2g4 e7e5 f1g2 d7d5 c2c4
FEN: rnbqkbnr/ppp2ppp/8/3pp3/2P3P1/8/PP1PPPBP/RNBQK1NR b KQkq –

ECO: A00
Opening Name: Grob Opening: Zilbermints Gambit
SAN: 1. g4 d5 2. e4 dxe4 3. Nc3
UCI: g2g4 d7d5 e2e4 d5e4 b1c3
FEN: rnbqkbnr/ppp1pppp/8/8/4p1P1/2N5/PPPP1P1P/R1BQKBNR b KQkq –

ECO: A00
Opening Name: Grob Opening: Zilbermints Gambit, Schiller Defense
SAN: 1. g4 d5 2. e4 dxe4 3. Nc3 h5
UCI: g2g4 d7d5 e2e4 d5e4 b1c3 h7h5
FEN: rnbqkbnr/ppp1ppp1/8/7p/4p1P1/2N5/PPPP1P1P/R1BQKBNR w KQkq –

ECO: A00
Opening Name: Grob Opening: Zilbermints Gambit, Zilbermints-Hartlaub Gambit
SAN: 1. g4 d5 2. e4 dxe4 3. Nc3 e5 4. d3
UCI: g2g4 d7d5 e2e4 d5e4 b1c3 e7e5 d2d3
FEN: rnbqkbnr/ppp2ppp/8/4p3/4p1P1/2NP4/PPP2P1P/R1BQKBNR b KQkq –

ECO: A00
Opening Name: Hungarian Opening
SAN: 1. g3
UCI: g2g3
FEN: rnbqkbnr/pppppppp/8/8/8/6P1/PPPPPP1P/RNBQKBNR b KQkq –

ECO: A00
Opening Name: Hungarian Opening: Asten Gambit
SAN: 1. g3 Nc6 2. Nc3 d5 3. d4 e5 4. dxe5 d4 5. Ne4 f5
UCI: g2g3 b8c6 b1c3 d7d5 d2d4 e7e5 d4e5 d5d4 c3e4 f7f5
FEN: r1bqkbnr/ppp3pp/2n5/4Pp2/3pN3/6P1/PPP1PP1P/R1BQKBNR w KQkq f6

ECO: A00
Opening Name: Hungarian Opening: Burk Gambit
SAN: 1. g3 e5 2. a3 d5 3. Nf3 e4 4. Nh4 Be7 5. d3
UCI: g2g3 e7e5 a2a3 d7d5 g1f3 e5e4 f3h4 f8e7 d2d3
FEN: rnbqk1nr/ppp1bppp/8/3p4/4p2N/P2P2P1/1PP1PP1P/RNBQKB1R b KQkq –

ECO: A00
Opening Name: Hungarian Opening: Bücker Gambit
SAN: 1. g3 d5 2. Bg2 e5 3. b4
UCI: g2g3 d7d5 f1g2 e7e5 b2b4
FEN: rnbqkbnr/ppp2ppp/8/3pp3/1P6/6P1/P1PPPPBP/RNBQK1NR b KQkq –

ECO: A00
Opening Name: Hungarian Opening: Catalan Formation
SAN: 1. g3 d5 2. Bg2 e6
UCI: g2g3 d7d5 f1g2 e7e6
FEN: rnbqkbnr/ppp2ppp/4p3/3p4/8/6P1/PPPPPPBP/RNBQK1NR w KQkq –

ECO: A00
Opening Name: Hungarian Opening: Dutch Defense
SAN: 1. g3 f5
UCI: g2g3 f7f5
FEN: rnbqkbnr/ppppp1pp/8/5p2/8/6P1/PPPPPP1P/RNBQKBNR w KQkq –

ECO: A00
Opening Name: Hungarian Opening: Indian Defense
SAN: 1. g3 Nf6
UCI: g2g3 g8f6
FEN: rnbqkb1r/pppppppp/5n2/8/8/6P1/PPPPPP1P/RNBQKBNR w KQkq –

ECO: A00
Opening Name: Hungarian Opening: Myers Defense
SAN: 1. g3 g5
UCI: g2g3 g7g5
FEN: rnbqkbnr/pppppp1p/8/6p1/8/6P1/PPPPPP1P/RNBQKBNR w KQkq –

ECO: A00
Opening Name: Hungarian Opening: Pachman Gambit
SAN: 1. g3 f5 2. e4 fxe4 3. Qh5+ g6
UCI: g2g3 f7f5 e2e4 f5e4 d1h5 g7g6
FEN: rnbqkbnr/ppppp2p/6p1/7Q/4p3/6P1/PPPP1P1P/RNB1KBNR w KQkq –

ECO: A00
Opening Name: Hungarian Opening: Paris Gambit
SAN: 1. g3 e5 2. Nh3 d5 3. f4 Bxh3 4. Bxh3 exf4 5. O-O
UCI: g2g3 e7e5 g1h3 d7d5 f2f4 c8h3 f1h3 e5f4 e1g1
FEN: rn1qkbnr/ppp2ppp/8/3p4/5p2/6PB/PPPPP2P/RNBQ1RK1 b kq –

ECO: A00
Opening Name: Hungarian Opening: Reversed Alekhine
SAN: 1. g3 e5 2. Nf3
UCI: g2g3 e7e5 g1f3
FEN: rnbqkbnr/pppp1ppp/8/4p3/8/5NP1/PPPPPP1P/RNBQKB1R b KQkq –

ECO: A00
Opening Name: Hungarian Opening: Reversed Brooklyn Defense, Brooklyn Benko Gambit
SAN: 1. g3 e5 2. Nf3 e4 3. Ng1 Nf6 4. b4
UCI: g2g3 e7e5 g1f3 e5e4 f3g1 g8f6 b2b4
FEN: rnbqkb1r/pppp1ppp/5n2/8/1P2p3/6P1/P1PPPP1P/RNBQKBNR b KQkq –

ECO: A00
Opening Name: Hungarian Opening: Reversed Modern Defense
SAN: 1. g3 d5 2. Bg2 c5
UCI: g2g3 d7d5 f1g2 c7c5
FEN: rnbqkbnr/pp2pppp/8/2pp4/8/6P1/PPPPPPBP/RNBQK1NR w KQkq –

ECO: A00
Opening Name: Hungarian Opening: Reversed Norwegian Defense
SAN: 1. g3 e5 2. Nf3 e4 3. Nh4
UCI: g2g3 e7e5 g1f3 e5e4 f3h4
FEN: rnbqkbnr/pppp1ppp/8/8/4p2N/6P1/PPPPPP1P/RNBQKB1R b KQkq –

ECO: A00
Opening Name: Hungarian Opening: Sicilian Invitation
SAN: 1. g3 c5
UCI: g2g3 c7c5
FEN: rnbqkbnr/pp1ppppp/8/2p5/8/6P1/PPPPPP1P/RNBQKBNR w KQkq –

ECO: A00
Opening Name: Hungarian Opening: Slav Formation
SAN: 1. g3 d5 2. Bg2 c6
UCI: g2g3 d7d5 f1g2 c7c6
FEN: rnbqkbnr/pp2pppp/2p5/3p4/8/6P1/PPPPPPBP/RNBQK1NR w KQkq –

ECO: A00
Opening Name: Hungarian Opening: Symmetrical Variation
SAN: 1. g3 g6
UCI: g2g3 g7g6
FEN: rnbqkbnr/pppppp1p/6p1/8/8/6P1/PPPPPP1P/RNBQKBNR w KQkq –

ECO: A00
Opening Name: Hungarian Opening: Van Kuijk Gambit
SAN: 1. g3 h5 2. Nf3 h4
UCI: g2g3 h7h5 g1f3 h5h4
FEN: rnbqkbnr/ppppppp1/8/8/7p/5NP1/PPPPPP1P/RNBQKB1R w KQkq –

ECO: A00
Opening Name: Hungarian Opening: Winterberg Gambit
SAN: 1. g3 d5 2. Bg2 e5 3. c4 dxc4 4. b3
UCI: g2g3 d7d5 f1g2 e7e5 c2c4 d5c4 b2b3
FEN: rnbqkbnr/ppp2ppp/8/4p3/2p5/1P4P1/P2PPPBP/RNBQK1NR b KQkq –

ECO: A00
Opening Name: Kádas Opening
SAN: 1. h4
UCI: h2h4
FEN: rnbqkbnr/pppppppp/8/8/7P/8/PPPPPPP1/RNBQKBNR b KQkq –

ECO: A00
Opening Name: Kádas Opening: Beginner’s Trap
SAN: 1. h4 d5 2. Rh3
UCI: h2h4 d7d5 h1h3
FEN: rnbqkbnr/ppp1pppp/8/3p4/7P/7R/PPPPPPP1/RNBQKBN1 b Qkq –

ECO: A00
Opening Name: Kádas Opening: Koola-Koola Variation
SAN: 1. h4 a5
UCI: h2h4 a7a5
FEN: rnbqkbnr/1ppppppp/8/p7/7P/8/PPPPPPP1/RNBQKBNR w KQkq –

ECO: A00
Opening Name: Kádas Opening: Kádas Gambit
SAN: 1. h4 c5 2. b4
UCI: h2h4 c7c5 b2b4
FEN: rnbqkbnr/pp1ppppp/8/2p5/1P5P/8/P1PPPPP1/RNBQKBNR b KQkq –

ECO: A00
Opening Name: Kádas Opening: Kádas Gambit
SAN: 1. h4 d5 2. d4 c5 3. Nf3 cxd4 4. c3
UCI: h2h4 d7d5 d2d4 c7c5 g1f3 c5d4 c2c3
FEN: rnbqkbnr/pp2pppp/8/3p4/3p3P/2P2N2/PP2PPP1/RNBQKB1R b KQkq –

ECO: A00
Opening Name: Kádas Opening: Kádas Gambit
SAN: 1. h4 e5 2. d4 exd4 3. c3
UCI: h2h4 e7e5 d2d4 e5d4 c2c3
FEN: rnbqkbnr/pppp1ppp/8/8/3p3P/2P5/PP2PPP1/RNBQKBNR b KQkq –

ECO: A00
Opening Name: Kádas Opening: Myers Variation
SAN: 1. h4 d5 2. d4 c5 3. e4
UCI: h2h4 d7d5 d2d4 c7c5 e2e4
FEN: rnbqkbnr/pp2pppp/8/2pp4/3PP2P/8/PPP2PP1/RNBQKBNR b KQkq –

ECO: A00
Opening Name: Kádas Opening: Schneider Gambit
SAN: 1. h4 g5
UCI: h2h4 g7g5
FEN: rnbqkbnr/pppppp1p/8/6p1/7P/8/PPPPPPP1/RNBQKBNR w KQkq –

ECO: A00
Opening Name: Kádas Opening: Steinbok Gambit
SAN: 1. h4 f5 2. e4 fxe4 3. d3
UCI: h2h4 f7f5 e2e4 f5e4 d2d3
FEN: rnbqkbnr/ppppp1pp/8/8/4p2P/3P4/PPP2PP1/RNBQKBNR b KQkq –

ECO: A00
Opening Name: Lasker Simul Special
SAN: 1. g3 h5
UCI: g2g3 h7h5
FEN: rnbqkbnr/ppppppp1/8/7p/8/6P1/PPPPPP1P/RNBQKBNR w KQkq –

ECO: A00
Opening Name: Mieses Opening
SAN: 1. d3
UCI: d2d3
FEN: rnbqkbnr/pppppppp/8/8/8/3P4/PPP1PPPP/RNBQKBNR b KQkq –

ECO: A00
Opening Name: Mieses Opening: Myers Spike Attack
SAN: 1. d3 g6 2. g4
UCI: d2d3 g7g6 g2g4
FEN: rnbqkbnr/pppppp1p/6p1/8/6P1/3P4/PPP1PP1P/RNBQKBNR b KQkq –

ECO: A00
Opening Name: Mieses Opening: Reversed Rat
SAN: 1. d3 e5
UCI: d2d3 e7e5
FEN: rnbqkbnr/pppp1ppp/8/4p3/8/3P4/PPP1PPPP/RNBQKBNR w KQkq –

ECO: A00
Opening Name: Mieses Opening: Venezolana Variation
SAN: 1. d3 c5 2. Nc3 Nc6 3. g3
UCI: d2d3 c7c5 b1c3 b8c6 g2g3
FEN: r1bqkbnr/pp1ppppp/2n5/2p5/8/2NP2P1/PPP1PP1P/R1BQKBNR b KQkq –

ECO: A00
Opening Name: Polish Opening
SAN: 1. b4
UCI: b2b4
FEN: rnbqkbnr/pppppppp/8/8/1P6/8/P1PPPPPP/RNBQKBNR b KQkq –

ECO: A00
Opening Name: Polish Opening: Baltic Defense
SAN: 1. b4 d5 2. Bb2 Bf5
UCI: b2b4 d7d5 c1b2 c8f5
FEN: rn1qkbnr/ppp1pppp/8/3p1b2/1P6/8/PBPPPPPP/RN1QKBNR w KQkq –

ECO: A00
Opening Name: Polish Opening: Birmingham Gambit
SAN: 1. b4 c5
UCI: b2b4 c7c5
FEN: rnbqkbnr/pp1ppppp/8/2p5/1P6/8/P1PPPPPP/RNBQKBNR w KQkq –

ECO: A00
Opening Name: Polish Opening: Bugayev Advance Variation
SAN: 1. b4 e5 2. Bb2 f6 3. b5
UCI: b2b4 e7e5 c1b2 f7f6 b4b5
FEN: rnbqkbnr/pppp2pp/5p2/1P2p3/8/8/PBPPPPPP/RN1QKBNR b KQkq –

ECO: A00
Opening Name: Polish Opening: Bugayev Attack
SAN: 1. b4 e5 2. a3
UCI: b2b4 e7e5 a2a3
FEN: rnbqkbnr/pppp1ppp/8/4p3/1P6/P7/2PPPPPP/RNBQKBNR b KQkq –

ECO: A00
Opening Name: Polish Opening: Czech Defense
SAN: 1. b4 e5 2. Bb2 d6
UCI: b2b4 e7e5 c1b2 d7d6
FEN: rnbqkbnr/ppp2ppp/3p4/4p3/1P6/8/PBPPPPPP/RN1QKBNR w KQkq –

ECO: A00
Opening Name: Polish Opening: Dutch Defense
SAN: 1. b4 f5
UCI: b2b4 f7f5
FEN: rnbqkbnr/ppppp1pp/8/5p2/1P6/8/P1PPPPPP/RNBQKBNR w KQkq –

ECO: A00
Opening Name: Polish Opening: German Defense
SAN: 1. b4 d5 2. Bb2 Qd6
UCI: b2b4 d7d5 c1b2 d8d6
FEN: rnb1kbnr/ppp1pppp/3q4/3p4/1P6/8/PBPPPPPP/RN1QKBNR w KQkq –

ECO: A00
Opening Name: Polish Opening: Grigorian Variation
SAN: 1. b4 Nc6
UCI: b2b4 b8c6
FEN: r1bqkbnr/pppppppp/2n5/8/1P6/8/P1PPPPPP/RNBQKBNR w KQkq –

ECO: A00
Opening Name: Polish Opening: Karniewski Variation
SAN: 1. b4 Nh6
UCI: b2b4 g8h6
FEN: rnbqkb1r/pppppppp/7n/8/1P6/8/P1PPPPPP/RNBQKBNR w KQkq –

ECO: A00
Opening Name: Polish Opening: King’s Indian Variation
SAN: 1. b4 Nf6 2. Bb2 g6
UCI: b2b4 g8f6 c1b2 g7g6
FEN: rnbqkb1r/pppppp1p/5np1/8/1P6/8/PBPPPPPP/RN1QKBNR w KQkq –

ECO: A00
Opening Name: Polish Opening: King’s Indian Variation, Schiffler Attack
SAN: 1. b4 Nf6 2. Bb2 g6 3. e4
UCI: b2b4 g8f6 c1b2 g7g6 e2e4
FEN: rnbqkb1r/pppppp1p/5np1/8/1P2P3/8/PBPP1PPP/RN1QKBNR b KQkq –

ECO: A00
Opening Name: Polish Opening: King’s Indian Variation, Sokolsky Attack
SAN: 1. b4 Nf6 2. Bb2 g6 3. c4 Bg7 4. e3 d6 5. Nf3 O-O 6. d4
UCI: b2b4 g8f6 c1b2 g7g6 c2c4 f8g7 e2e3 d7d6 g1f3 e8g8 d2d4
FEN: rnbq1rk1/ppp1ppbp/3p1np1/8/1PPP4/4PN2/PB3PPP/RN1QKB1R b KQ –

ECO: A00
Opening Name: Polish Opening: Myers Variation
SAN: 1. b4 d5 2. Bb2 c6 3. a4
UCI: b2b4 d7d5 c1b2 c7c6 a2a4
FEN: rnbqkbnr/pp2pppp/2p5/3p4/PP6/8/1BPPPPPP/RN1QKBNR b KQkq –

ECO: A00
Opening Name: Polish Opening: Outflank Variation
SAN: 1. b4 c6
UCI: b2b4 c7c6
FEN: rnbqkbnr/pp1ppppp/2p5/8/1P6/8/P1PPPPPP/RNBQKBNR w KQkq –

ECO: A00
Opening Name: Polish Opening: Queen’s Indian Variation
SAN: 1. b4 e6 2. Bb2 Nf6 3. b5 b6
UCI: b2b4 e7e6 c1b2 g8f6 b4b5 b7b6
FEN: rnbqkb1r/p1pp1ppp/1p2pn2/1P6/8/8/PBPPPPPP/RN1QKBNR w KQkq –

ECO: A00
Opening Name: Polish Opening: Queenside Defense
SAN: 1. b4 e6 2. Bb2 Nf6 3. b5 a6
UCI: b2b4 e7e6 c1b2 g8f6 b4b5 a7a6
FEN: rnbqkb1r/1ppp1ppp/p3pn2/1P6/8/8/PBPPPPPP/RN1QKBNR w KQkq –

ECO: A00
Opening Name: Polish Opening: Rooks Swap Line
SAN: 1. b4 e6 2. Bb2 Nf6 3. b5 a6 4. a4 axb5 5. axb5 Rxa1 6. Bxa1
UCI: b2b4 e7e6 c1b2 g8f6 b4b5 a7a6 a2a4 a6b5 a4b5 a8a1 b2a1
FEN: 1nbqkb1r/1ppp1ppp/4pn2/1P6/8/8/2PPPPPP/BN1QKBNR b Kk –

ECO: A00
Opening Name: Polish Opening: Schiffler-Sokolsky Variation
SAN: 1. b4 e6 2. Bb2 Nf6 3. b5 d5 4. e3
UCI: b2b4 e7e6 c1b2 g8f6 b4b5 d7d5 e2e3
FEN: rnbqkb1r/ppp2ppp/4pn2/1P1p4/8/4P3/PBPP1PPP/RN1QKBNR b KQkq –

ECO: A00
Opening Name: Polish Opening: Schuehler Gambit
SAN: 1. b4 c6 2. Bb2 a5 3. b5 cxb5 4. e4
UCI: b2b4 c7c6 c1b2 a7a5 b4b5 c6b5 e2e4
FEN: rnbqkbnr/1p1ppppp/8/pp6/4P3/8/PBPP1PPP/RN1QKBNR b KQkq –

ECO: A00
Opening Name: Polish Opening: Symmetrical Variation
SAN: 1. b4 b5
UCI: b2b4 b7b5
FEN: rnbqkbnr/p1pppppp/8/1p6/1P6/8/P1PPPPPP/RNBQKBNR w KQkq –

ECO: A00
Opening Name: Polish Opening: Tartakower Gambit
SAN: 1. b4 e5 2. Bb2 f6 3. e4
UCI: b2b4 e7e5 c1b2 f7f6 e2e4
FEN: rnbqkbnr/pppp2pp/5p2/4p3/1P2P3/8/PBPP1PPP/RN1QKBNR b KQkq –

ECO: A00
Opening Name: Polish Opening: Wolferts Gambit
SAN: 1. b4 e5 2. Bb2 c5
UCI: b2b4 e7e5 c1b2 c7c5
FEN: rnbqkbnr/pp1p1ppp/8/2p1p3/1P6/8/PBPPPPPP/RN1QKBNR w KQkq –

ECO: A00
Opening Name: Saragossa Opening
SAN: 1. c3
UCI: c2c3
FEN: rnbqkbnr/pppppppp/8/8/8/2P5/PP1PPPPP/RNBQKBNR b KQkq –

ECO: A00
Opening Name: Sodium Attack
SAN: 1. Na3
UCI: b1a3
FEN: rnbqkbnr/pppppppp/8/8/8/N7/PPPPPPPP/R1BQKBNR b KQkq –

ECO: A00
Opening Name: Sodium Attack: Celadon Variation
SAN: 1. Na3 e5 2. d3 Bxa3 3. bxa3 d5 4. e3 c5 5. Rb1
UCI: b1a3 e7e5 d2d3 f8a3 b2a3 d7d5 e2e3 c7c5 a1b1
FEN: rnbqk1nr/pp3ppp/8/2ppp3/8/P2PP3/P1P2PPP/1RBQKBNR b Kkq –

ECO: A00
Opening Name: Sodium Attack: Chenoboskion Variation
SAN: 1. Na3 g6 2. g4
UCI: b1a3 g7g6 g2g4
FEN: rnbqkbnr/pppppp1p/6p1/8/6P1/N7/PPPPPP1P/R1BQKBNR b KQkq –

ECO: A00
Opening Name: Sodium Attack: Durkin Gambit
SAN: 1. Na3 e5 2. Nc4 Nc6 3. e4 f5
UCI: b1a3 e7e5 a3c4 b8c6 e2e4 f7f5
FEN: r1bqkbnr/pppp2pp/2n5/4pp2/2N1P3/8/PPPP1PPP/R1BQKBNR w KQkq –

ECO: A00
Opening Name: Valencia Opening
SAN: 1. d3 e5 2. Nd2
UCI: d2d3 e7e5 b1d2
FEN: rnbqkbnr/pppp1ppp/8/4p3/8/3P4/PPPNPPPP/R1BQKBNR b KQkq –

ECO: A00
Opening Name: Van Geet Opening
SAN: 1. Nc3
UCI: b1c3
FEN: rnbqkbnr/pppppppp/8/8/8/2N5/PPPPPPPP/R1BQKBNR b KQkq –

ECO: A00
Opening Name: Van Geet Opening: Battambang Variation
SAN: 1. a3 e5 2. Nc3
UCI: a2a3 e7e5 b1c3
FEN: rnbqkbnr/pppp1ppp/8/4p3/8/P1N5/1PPPPPPP/R1BQKBNR b KQkq –

ECO: A00
Opening Name: Van Geet Opening: Billockus-Johansen Gambit
SAN: 1. Nc3 e5 2. Nf3 Bc5
UCI: b1c3 e7e5 g1f3 f8c5
FEN: rnbqk1nr/pppp1ppp/8/2b1p3/8/2N2N2/PPPPPPPP/R1BQKB1R w KQkq –

ECO: A00
Opening Name: Van Geet Opening: Damhaug Gambit
SAN: 1. Nc3 d5 2. f4 e5
UCI: b1c3 d7d5 f2f4 e7e5
FEN: rnbqkbnr/ppp2ppp/8/3pp3/5P2/2N5/PPPPP1PP/R1BQKBNR w KQkq –

ECO: A00
Opening Name: Van Geet Opening: Dougherty Gambit
SAN: 1. Nc3 d5 2. e4 dxe4 3. f3
UCI: b1c3 d7d5 e2e4 d5e4 f2f3
FEN: rnbqkbnr/ppp1pppp/8/8/4p3/2N2P2/PPPP2PP/R1BQKBNR b KQkq –

ECO: A00
Opening Name: Van Geet Opening: Dunst-Perrenet Gambit
SAN: 1. Nc3 d5 2. e4 dxe4 3. d3
UCI: b1c3 d7d5 e2e4 d5e4 d2d3
FEN: rnbqkbnr/ppp1pppp/8/8/4p3/2NP4/PPP2PPP/R1BQKBNR b KQkq –

ECO: A00
Opening Name: Van Geet Opening: Düsseldorf Gambit
SAN: 1. Nc3 c5 2. b4
UCI: b1c3 c7c5 b2b4
FEN: rnbqkbnr/pp1ppppp/8/2p5/1P6/2N5/P1PPPPPP/R1BQKBNR b KQkq –

ECO: A00
Opening Name: Van Geet Opening: Gladbacher Gambit
SAN: 1. Nc3 e5 2. b3 d5 3. e4 dxe4 4. d3
UCI: b1c3 e7e5 b2b3 d7d5 e2e4 d5e4 d2d3
FEN: rnbqkbnr/ppp2ppp/8/4p3/4p3/1PNP4/P1P2PPP/R1BQKBNR b KQkq –

ECO: A00
Opening Name: Van Geet Opening: Hector Gambit
SAN: 1. Nc3 d5 2. e4 dxe4 3. Bc4
UCI: b1c3 d7d5 e2e4 d5e4 f1c4
FEN: rnbqkbnr/ppp1pppp/8/8/2B1p3/2N5/PPPP1PPP/R1BQK1NR b KQkq –

ECO: A00
Opening Name: Van Geet Opening: Hergert Gambit
SAN: 1. Nc3 d6 2. f4 e5 3. fxe5 Nc6
UCI: b1c3 d7d6 f2f4 e7e5 f4e5 b8c6
FEN: r1bqkbnr/ppp2ppp/2np4/4P3/8/2N5/PPPPP1PP/R1BQKBNR w KQkq –

ECO: A00
Opening Name: Van Geet Opening: Hulsemann Gambit
SAN: 1. Nc3 e5 2. e3 d5 3. Qh5 Be6
UCI: b1c3 e7e5 e2e3 d7d5 d1h5 c8e6
FEN: rn1qkbnr/ppp2ppp/4b3/3pp2Q/8/2N1P3/PPPP1PPP/R1B1KBNR w KQkq –

ECO: A00
Opening Name: Van Geet Opening: Jendrossek Gambit
SAN: 1. Nc3 d5 2. f4 d4 3. Ne4 f5 4. Nf2 Nf6 5. Nf3 c5 6. b4
UCI: b1c3 d7d5 f2f4 d5d4 c3e4 f7f5 e4f2 g8f6 g1f3 c7c5 b2b4
FEN: rnbqkb1r/pp2p1pp/5n2/2p2p2/1P1p1P2/5N2/P1PPPNPP/R1BQKB1R b KQkq –

ECO: A00
Opening Name: Van Geet Opening: Kluever Gambit
SAN: 1. Nc3 f5 2. e4 fxe4 3. d3
UCI: b1c3 f7f5 e2e4 f5e4 d2d3
FEN: rnbqkbnr/ppppp1pp/8/8/4p3/2NP4/PPP2PPP/R1BQKBNR b KQkq –

ECO: A00
Opening Name: Van Geet Opening: Laroche Gambit
SAN: 1. Nc3 b5
UCI: b1c3 b7b5
FEN: rnbqkbnr/p1pppppp/8/1p6/8/2N5/PPPPPPPP/R1BQKBNR w KQkq –

ECO: A00
Opening Name: Van Geet Opening: Liebig Gambit
SAN: 1. Nc3 e5 2. e3 d5 3. Qh5 Nf6
UCI: b1c3 e7e5 e2e3 d7d5 d1h5 g8f6
FEN: rnbqkb1r/ppp2ppp/5n2/3pp2Q/8/2N1P3/PPPP1PPP/R1B1KBNR w KQkq –

ECO: A00
Opening Name: Van Geet Opening: Melleby Gambit
SAN: 1. Nc3 d5 2. f4 d4 3. Ne4 c5
UCI: b1c3 d7d5 f2f4 d5d4 c3e4 c7c5
FEN: rnbqkbnr/pp2pppp/8/2p5/3pNP2/8/PPPPP1PP/R1BQKBNR w KQkq –

ECO: A00
Opening Name: Van Geet Opening: Myers Attack
SAN: 1. Nc3 g6 2. h4
UCI: b1c3 g7g6 h2h4
FEN: rnbqkbnr/pppppp1p/6p1/8/7P/2N5/PPPPPPP1/R1BQKBNR b KQkq –

ECO: A00
Opening Name: Van Geet Opening: Napoleon Attack
SAN: 1. Nc3 e5 2. Nf3 Nc6 3. d4
UCI: b1c3 e7e5 g1f3 b8c6 d2d4
FEN: r1bqkbnr/pppp1ppp/2n5/4p3/3P4/2N2N2/PPP1PPPP/R1BQKB1R b KQkq –

ECO: A00
Opening Name: Van Geet Opening: Novosibirsk Variation
SAN: 1. Nc3 c5 2. d4 cxd4 3. Qxd4 Nc6 4. Qh4
UCI: b1c3 c7c5 d2d4 c5d4 d1d4 b8c6 d4h4
FEN: r1bqkbnr/pp1ppppp/2n5/8/7Q/2N5/PPP1PPPP/R1B1KBNR b KQkq –

ECO: A00
Opening Name: Van Geet Opening: Nowokunski Gambit
SAN: 1. Nc3 e5 2. f4 exf4 3. e4
UCI: b1c3 e7e5 f2f4 e5f4 e2e4
FEN: rnbqkbnr/pppp1ppp/8/8/4Pp2/2N5/PPPP2PP/R1BQKBNR b KQkq e3

ECO: A00
Opening Name: Van Geet Opening: Pfeiffer Gambit
SAN: 1. Nc3 d5 2. f4 d4 3. Ne4 e5
UCI: b1c3 d7d5 f2f4 d5d4 c3e4 e7e5
FEN: rnbqkbnr/ppp2ppp/8/4p3/3pNP2/8/PPPPP1PP/R1BQKBNR w KQkq –

ECO: A00
Opening Name: Van Geet Opening: Pfeiffer Gambit, Sleipnir Countergambit
SAN: 1. Nc3 d5 2. f4 d4 3. Ne4 e5 4. Nf3
UCI: b1c3 d7d5 f2f4 d5d4 c3e4 e7e5 g1f3
FEN: rnbqkbnr/ppp2ppp/8/4p3/3pNP2/5N2/PPPPP1PP/R1BQKB1R b KQkq –

ECO: A00
Opening Name: Van Geet Opening: Reversed Nimzowitsch
SAN: 1. Nc3 e5
UCI: b1c3 e7e5
FEN: rnbqkbnr/pppp1ppp/8/4p3/8/2N5/PPPPPPPP/R1BQKBNR w KQkq –

ECO: A00
Opening Name: Van Geet Opening: Reversed Scandinavian
SAN: 1. Nc3 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qa4
UCI: b1c3 e7e5 d2d4 e5d4 d1d4 b8c6 d4a4
FEN: r1bqkbnr/pppp1ppp/2n5/8/Q7/2N5/PPP1PPPP/R1B1KBNR b KQkq –

ECO: A00
Opening Name: Van Geet Opening: Sicilian Two Knights
SAN: 1. Nc3 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4
UCI: b1c3 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4
FEN: r1bqkbnr/pp1ppppp/2n5/8/3N4/2N5/PPP1PPPP/R1BQKB1R b KQkq –

ECO: A00
Opening Name: Van Geet Opening: Sleipnir Gambit
SAN: 1. Nc3 d5 2. e3 e5 3. d4 Bb4
UCI: b1c3 d7d5 e2e3 e7e5 d2d4 f8b4
FEN: rnbqk1nr/ppp2ppp/8/3pp3/1b1P4/2N1P3/PPP2PPP/R1BQKBNR w KQkq –

ECO: A00
Opening Name: Van Geet Opening: Twyble Attack
SAN: 1. Nc3 c5 2. Rb1
UCI: b1c3 c7c5 a1b1
FEN: rnbqkbnr/pp1ppppp/8/2p5/8/2N5/PPPPPPPP/1RBQKBNR b Kkq –

ECO: A00
Opening Name: Van Geet Opening: Tübingen Gambit
SAN: 1. Nc3 Nf6 2. g4
UCI: b1c3 g8f6 g2g4
FEN: rnbqkb1r/pppppppp/5n2/8/6P1/2N5/PPPPPP1P/R1BQKBNR b KQkq –

ECO: A00
Opening Name: Van Geet Opening: Venezolana Variation
SAN: 1. Nc3 d5 2. d3 Nf6 3. g3
UCI: b1c3 d7d5 d2d3 g8f6 g2g3
FEN: rnbqkb1r/ppp1pppp/5n2/3p4/8/2NP2P1/PPP1PP1P/R1BQKBNR b KQkq –

ECO: A00
Opening Name: Van Geet Opening: Warsteiner Gambit
SAN: 1. Nc3 d5 2. f4 g5
UCI: b1c3 d7d5 f2f4 g7g5
FEN: rnbqkbnr/ppp1pp1p/8/3p2p1/5P2/2N5/PPPPP1PP/R1BQKBNR w KQkq –

ECO: A00
Opening Name: Van’t Kruijs Opening
SAN: 1. e3
UCI: e2e3
FEN: rnbqkbnr/pppppppp/8/8/8/4P3/PPPP1PPP/RNBQKBNR b KQkq –

ECO: A00
Opening Name: Van’t Kruijs Opening: Bouncing Bishop Variation
SAN: 1. e3 e5 2. Bc4 b5 3. Bb3
UCI: e2e3 e7e5 f1c4 b7b5 c4b3
FEN: rnbqkbnr/p1pp1ppp/8/1p2p3/8/1B2P3/PPPP1PPP/RNBQK1NR b KQkq –

ECO: A00
Opening Name: Van’t Kruijs Opening: Keoni-Hiva Gambit, Akahi Variation
SAN: 1. e3 e5 2. Nc3 Nf6 3. f4 exf4 4. Nf3
UCI: e2e3 e7e5 b1c3 g8f6 f2f4 e5f4 g1f3
FEN: rnbqkb1r/pppp1ppp/5n2/8/5p2/2N1PN2/PPPP2PP/R1BQKB1R b KQkq –

ECO: A00
Opening Name: Van’t Kruijs Opening: Keoni-Hiva Gambit, Alua Variation
SAN: 1. e3 e5 2. Nc3 Nc6 3. f4 exf4 4. Nf3
UCI: e2e3 e7e5 b1c3 b8c6 f2f4 e5f4 g1f3
FEN: r1bqkbnr/pppp1ppp/2n5/8/5p2/2N1PN2/PPPP2PP/R1BQKB1R b KQkq –

ECO: A00
Opening Name: Van’t Kruijs Opening: Keoni-Hiva Gambit, Ekolu Variation
SAN: 1. e3 e5 2. Nc3 d5 3. f4 exf4 4. Nf3
UCI: e2e3 e7e5 b1c3 d7d5 f2f4 e5f4 g1f3
FEN: rnbqkbnr/ppp2ppp/8/3p4/5p2/2N1PN2/PPPP2PP/R1BQKB1R b KQkq –

ECO: A00
Opening Name: Ware Opening
SAN: 1. a4
UCI: a2a4
FEN: rnbqkbnr/pppppppp/8/8/P7/8/1PPPPPPP/RNBQKBNR b KQkq –

ECO: A00
Opening Name: Ware Opening: Cologne Gambit
SAN: 1. a4 b6 2. d4 d5 3. Nc3 Nd7
UCI: a2a4 b7b6 d2d4 d7d5 b1c3 b8d7
FEN: r1bqkbnr/p1pnpppp/1p6/3p4/P2P4/2N5/1PP1PPPP/R1BQKBNR w KQkq –

ECO: A00
Opening Name: Ware Opening: Crab Variation
SAN: 1. a4 e5 2. h4
UCI: a2a4 e7e5 h2h4
FEN: rnbqkbnr/pppp1ppp/8/4p3/P6P/8/1PPPPPP1/RNBQKBNR b KQkq –

ECO: A00
Opening Name: Ware Opening: Meadow Hay Trap
SAN: 1. a4 e5 2. Ra3
UCI: a2a4 e7e5 a1a3
FEN: rnbqkbnr/pppp1ppp/8/4p3/P7/R7/1PPPPPPP/1NBQKBNR b Kkq –

ECO: A00
Opening Name: Ware Opening: Symmetric Variation
SAN: 1. a4 a5
UCI: a2a4 a7a5
FEN: rnbqkbnr/1ppppppp/8/p7/P7/8/1PPPPPPP/RNBQKBNR w KQkq –

ECO: A00
Opening Name: Ware Opening: Ware Gambit
SAN: 1. a4 e5 2. a5 d5 3. e3 f5 4. a6
UCI: a2a4 e7e5 a4a5 d7d5 e2e3 f7f5 a5a6
FEN: rnbqkbnr/ppp3pp/P7/3ppp2/8/4P3/1PPP1PPP/RNBQKBNR b KQkq –

ECO: A00
Opening Name: Ware Opening: Wing Gambit
SAN: 1. a4 b5 2. axb5 Bb7
UCI: a2a4 b7b5 a4b5 c8b7
FEN: rn1qkbnr/pbpppppp/8/1P6/8/8/1PPPPPPP/RNBQKBNR w KQkq –

ECO: A01
Opening Name: Nimzo-Larsen Attack
SAN: 1. b3
UCI: b2b3
FEN: rnbqkbnr/pppppppp/8/8/8/1P6/P1PPPPPP/RNBQKBNR b KQkq –

ECO: A01
Opening Name: Nimzo-Larsen Attack: Classical Variation
SAN: 1. b3 d5
UCI: b2b3 d7d5
FEN: rnbqkbnr/ppp1pppp/8/3p4/8/1P6/P1PPPPPP/RNBQKBNR w KQkq –

ECO: A01
Opening Name: Nimzo-Larsen Attack: Dutch Variation
SAN: 1. b3 f5
UCI: b2b3 f7f5
FEN: rnbqkbnr/ppppp1pp/8/5p2/8/1P6/P1PPPPPP/RNBQKBNR w KQkq –

ECO: A01
Opening Name: Nimzo-Larsen Attack: English Variation
SAN: 1. b3 c5
UCI: b2b3 c7c5
FEN: rnbqkbnr/pp1ppppp/8/2p5/8/1P6/P1PPPPPP/RNBQKBNR w KQkq –

ECO: A01
Opening Name: Nimzo-Larsen Attack: Graz Attack
SAN: 1. b3 d5 2. Ba3
UCI: b2b3 d7d5 c1a3
FEN: rnbqkbnr/ppp1pppp/8/3p4/8/BP6/P1PPPPPP/RN1QKBNR b KQkq –

ECO: A01
Opening Name: Nimzo-Larsen Attack: Indian Variation
SAN: 1. b3 Nf6
UCI: b2b3 g8f6
FEN: rnbqkb1r/pppppppp/5n2/8/8/1P6/P1PPPPPP/RNBQKBNR w KQkq –

ECO: A01
Opening Name: Nimzo-Larsen Attack: Modern Variation
SAN: 1. b3 e5
UCI: b2b3 e7e5
FEN: rnbqkbnr/pppp1ppp/8/4p3/8/1P6/P1PPPPPP/RNBQKBNR w KQkq –

ECO: A01
Opening Name: Nimzo-Larsen Attack: Modern Variation
SAN: 1. b3 e5 2. Bb2 Nc6
UCI: b2b3 e7e5 c1b2 b8c6
FEN: r1bqkbnr/pppp1ppp/2n5/4p3/8/1P6/PBPPPPPP/RN1QKBNR w KQkq –

ECO: A01
Opening Name: Nimzo-Larsen Attack: Modern Variation
SAN: 1. b3 e5 2. Bb2 Nc6 3. e3
UCI: b2b3 e7e5 c1b2 b8c6 e2e3
FEN: r1bqkbnr/pppp1ppp/2n5/4p3/8/1P2P3/PBPP1PPP/RN1QKBNR b KQkq –

ECO: A01
Opening Name: Nimzo-Larsen Attack: Modern Variation
SAN: 1. b3 e5 2. Bb2 Nc6 3. c4 Nf6
UCI: b2b3 e7e5 c1b2 b8c6 c2c4 g8f6
FEN: r1bqkb1r/pppp1ppp/2n2n2/4p3/2P5/1P6/PB1PPPPP/RN1QKBNR w KQkq –

ECO: A01
Opening Name: Nimzo-Larsen Attack: Pachman Gambit
SAN: 1. b3 e5 2. Bb2 Nc6 3. f4
UCI: b2b3 e7e5 c1b2 b8c6 f2f4
FEN: r1bqkbnr/pppp1ppp/2n5/4p3/5P2/1P6/PBPPP1PP/RN1QKBNR b KQkq –

ECO: A01
Opening Name: Nimzo-Larsen Attack: Polish Variation
SAN: 1. b3 b5
UCI: b2b3 b7b5
FEN: rnbqkbnr/p1pppppp/8/1p6/8/1P6/P1PPPPPP/RNBQKBNR w KQkq –

ECO: A01
Opening Name: Nimzo-Larsen Attack: Ringelbach Gambit
SAN: 1. b3 f5 2. Bb2 e6 3. e4
UCI: b2b3 f7f5 c1b2 e7e6 e2e4
FEN: rnbqkbnr/pppp2pp/4p3/5p2/4P3/1P6/PBPP1PPP/RN1QKBNR b KQkq –

ECO: A01
Opening Name: Nimzo-Larsen Attack: Spike Variation
SAN: 1. b3 Nf6 2. Bb2 g6 3. g4
UCI: b2b3 g8f6 c1b2 g7g6 g2g4
FEN: rnbqkb1r/pppppp1p/5np1/8/6P1/1P6/PBPPPP1P/RN1QKBNR b KQkq –

ECO: A01
Opening Name: Nimzo-Larsen Attack: Symmetrical Variation
SAN: 1. b3 b6
UCI: b2b3 b7b6
FEN: rnbqkbnr/p1pppppp/1p6/8/8/1P6/P1PPPPPP/RNBQKBNR w KQkq –

ECO: A02
Opening Name: Bird Opening
SAN: 1. f4
UCI: f2f4
FEN: rnbqkbnr/pppppppp/8/8/5P2/8/PPPPP1PP/RNBQKBNR b KQkq –

ECO: A02
Opening Name: Bird Opening: Batavo-Polish Attack
SAN: 1. f4 Nf6 2. Nf3 g6 3. b4
UCI: f2f4 g8f6 g1f3 g7g6 b2b4
FEN: rnbqkb1r/pppppp1p/5np1/8/1P3P2/5N2/P1PPP1PP/RNBQKB1R b KQkq –

ECO: A02
Opening Name: Bird Opening: Double Duck Formation
SAN: 1. f4 f5 2. d4 d5
UCI: f2f4 f7f5 d2d4 d7d5
FEN: rnbqkbnr/ppp1p1pp/8/3p1p2/3P1P2/8/PPP1P1PP/RNBQKBNR w KQkq –

ECO: A02
Opening Name: Bird Opening: From’s Gambit
SAN: 1. f4 e5
UCI: f2f4 e7e5
FEN: rnbqkbnr/pppp1ppp/8/4p3/5P2/8/PPPPP1PP/RNBQKBNR w KQkq –

ECO: A02
Opening Name: Bird Opening: From’s Gambit, Bahr Gambit
SAN: 1. f4 e5 2. Nc3
UCI: f2f4 e7e5 b1c3
FEN: rnbqkbnr/pppp1ppp/8/4p3/5P2/2N5/PPPPP1PP/R1BQKBNR b KQkq –

ECO: A02
Opening Name: Bird Opening: From’s Gambit, Langheld Gambit
SAN: 1. f4 e5 2. fxe5 d6 3. exd6 Nf6
UCI: f2f4 e7e5 f4e5 d7d6 e5d6 g8f6
FEN: rnbqkb1r/ppp2ppp/3P1n2/8/8/8/PPPPP1PP/RNBQKBNR w KQkq –

ECO: A02
Opening Name: Bird Opening: From’s Gambit, Lasker Variation
SAN: 1. f4 e5 2. fxe5 d6 3. exd6 Bxd6 4. Nf3 g5
UCI: f2f4 e7e5 f4e5 d7d6 e5d6 f8d6 g1f3 g7g5
FEN: rnbqk1nr/ppp2p1p/3b4/6p1/8/5N2/PPPPP1PP/RNBQKB1R w KQkq –

ECO: A02
Opening Name: Bird Opening: From’s Gambit, Lipke Variation
SAN: 1. f4 e5 2. fxe5 d6 3. exd6 Bxd6 4. Nf3 Nh6 5. d4
UCI: f2f4 e7e5 f4e5 d7d6 e5d6 f8d6 g1f3 g8h6 d2d4
FEN: rnbqk2r/ppp2ppp/3b3n/8/3P4/5N2/PPP1P1PP/RNBQKB1R b KQkq –

ECO: A02
Opening Name: Bird Opening: Hobbs Gambit
SAN: 1. f4 g5
UCI: f2f4 g7g5
FEN: rnbqkbnr/pppppp1p/8/6p1/5P2/8/PPPPP1PP/RNBQKBNR w KQkq –

ECO: A02
Opening Name: Bird Opening: Hobbs-Zilbermints Gambit
SAN: 1. f4 h6 2. Nf3 g5
UCI: f2f4 h7h6 g1f3 g7g5
FEN: rnbqkbnr/pppppp2/7p/6p1/5P2/5N2/PPPPP1PP/RNBQKB1R w KQkq –

ECO: A02
Opening Name: Bird Opening: Horsefly Defense
SAN: 1. f4 Nh6
UCI: f2f4 g8h6
FEN: rnbqkb1r/pppppppp/7n/8/5P2/8/PPPPP1PP/RNBQKBNR w KQkq –

ECO: A02
Opening Name: Bird Opening: Lasker Gambit
SAN: 1. f4 e5 2. fxe5 f6
UCI: f2f4 e7e5 f4e5 f7f6
FEN: rnbqkbnr/pppp2pp/5p2/4P3/8/8/PPPPP1PP/RNBQKBNR w KQkq –

ECO: A02
Opening Name: Bird Opening: Mujannah
SAN: 1. f4 Nf6 2. c4
UCI: f2f4 g8f6 c2c4
FEN: rnbqkb1r/pppppppp/5n2/8/2P2P2/8/PP1PP1PP/RNBQKBNR b KQkq –

ECO: A02
Opening Name: Bird Opening: Myers Defense
SAN: 1. f4 b5
UCI: f2f4 b7b5
FEN: rnbqkbnr/p1pppppp/8/1p6/5P2/8/PPPPP1PP/RNBQKBNR w KQkq –

ECO: A02
Opening Name: Bird Opening: Platz Gambit
SAN: 1. f4 e5 2. fxe5 Ne7
UCI: f2f4 e7e5 f4e5 g8e7
FEN: rnbqkb1r/ppppnppp/8/4P3/8/8/PPPPP1PP/RNBQKBNR w KQkq –

ECO: A02
Opening Name: Bird Opening: Schlechter Gambit
SAN: 1. f4 e5 2. fxe5 Nc6
UCI: f2f4 e7e5 f4e5 b8c6
FEN: r1bqkbnr/pppp1ppp/2n5/4P3/8/8/PPPPP1PP/RNBQKBNR w KQkq –

ECO: A02
Opening Name: Bird Opening: Siegener Gambit
SAN: 1. f4 e5 2. d4 exd4 3. Nf3 c5 4. c3
UCI: f2f4 e7e5 d2d4 e5d4 g1f3 c7c5 c2c3
FEN: rnbqkbnr/pp1p1ppp/8/2p5/3p1P2/2P2N2/PP2P1PP/RNBQKB1R b KQkq –

ECO: A02
Opening Name: Bird Opening: Swiss Gambit
SAN: 1. f4 f5 2. e4 fxe4 3. Nc3 Nf6 4. g4
UCI: f2f4 f7f5 e2e4 f5e4 b1c3 g8f6 g2g4
FEN: rnbqkb1r/ppppp1pp/5n2/8/4pPP1/2N5/PPPP3P/R1BQKBNR b KQkq –

ECO: A02
Opening Name: Bird Opening: Wagner-Zwitersch Gambit
SAN: 1. f4 f5 2. e4
UCI: f2f4 f7f5 e2e4
FEN: rnbqkbnr/ppppp1pp/8/5p2/4PP2/8/PPPP2PP/RNBQKBNR b KQkq –

ECO: A03
Opening Name: Bird Opening: Dutch Variation
SAN: 1. f4 d5
UCI: f2f4 d7d5
FEN: rnbqkbnr/ppp1pppp/8/3p4/5P2/8/PPPPP1PP/RNBQKBNR w KQkq –

ECO: A03
Opening Name: Bird Opening: Dutch Variation, Dudweiler Gambit
SAN: 1. f4 d5 2. g4
UCI: f2f4 d7d5 g2g4
FEN: rnbqkbnr/ppp1pppp/8/3p4/5PP1/8/PPPPP2P/RNBQKBNR b KQkq –

ECO: A03
Opening Name: Bird Opening: Lasker Variation
SAN: 1. f4 d5 2. Nf3 Nf6 3. e3 c5
UCI: f2f4 d7d5 g1f3 g8f6 e2e3 c7c5
FEN: rnbqkb1r/pp2pppp/5n2/2pp4/5P2/4PN2/PPPP2PP/RNBQKB1R w KQkq –

ECO: A03
Opening Name: Bird Opening: Sturm Gambit
SAN: 1. f4 d5 2. c4
UCI: f2f4 d7d5 c2c4
FEN: rnbqkbnr/ppp1pppp/8/3p4/2P2P2/8/PP1PP1PP/RNBQKBNR b KQkq –

ECO: A03
Opening Name: Bird Opening: Thomas Gambit
SAN: 1. f4 d5 2. b3 Nf6 3. Bb2 d4 4. Nf3 c5 5. e3
UCI: f2f4 d7d5 b2b3 g8f6 c1b2 d5d4 g1f3 c7c5 e2e3
FEN: rnbqkb1r/pp2pppp/5n2/2p5/3p1P2/1P2PN2/PBPP2PP/RN1QKB1R b KQkq –

ECO: A03
Opening Name: Bird Opening: Williams Gambit
SAN: 1. f4 d5 2. e4
UCI: f2f4 d7d5 e2e4
FEN: rnbqkbnr/ppp1pppp/8/3p4/4PP2/8/PPPP2PP/RNBQKBNR b KQkq –

ECO: A03
Opening Name: Bird Opening: Williams Gambit
SAN: 1. f4 d5 2. e4 dxe4 3. Nc3 Nf6 4. Qe2
UCI: f2f4 d7d5 e2e4 d5e4 b1c3 g8f6 d1e2
FEN: rnbqkb1r/ppp1pppp/5n2/8/4pP2/2N5/PPPPQ1PP/R1B1KBNR b KQkq –

ECO: A03
Opening Name: Bird Opening: Williams-Zilbermints Gambit
SAN: 1. f4 d5 2. e4 dxe4 3. Nc3 Nf6 4. Nge2
UCI: f2f4 d7d5 e2e4 d5e4 b1c3 g8f6 g1e2
FEN: rnbqkb1r/ppp1pppp/5n2/8/4pP2/2N5/PPPPN1PP/R1BQKB1R b KQkq –

ECO: A04
Opening Name: Colle System: Rhamphorhynchus Variation
SAN: 1. Nf3 c5 2. e3 g6 3. d4 Bg7 4. dxc5 Qa5+
UCI: g1f3 c7c5 e2e3 g7g6 d2d4 f8g7 d4c5 d8a5
FEN: rnb1k1nr/pp1pppbp/6p1/q1P5/8/4PN2/PPP2PPP/RNBQKB1R w KQkq –

ECO: A04
Opening Name: Modern Defense: Semi-Averbakh Variation, Polish Variation
SAN: 1. Nf3 c5 2. c4 g6 3. d4 Bg7 4. e4 Qb6
UCI: g1f3 c7c5 c2c4 g7g6 d2d4 f8g7 e2e4 d8b6
FEN: rnb1k1nr/pp1pppbp/1q4p1/2p5/2PPP3/5N2/PP3PPP/RNBQKB1R w KQkq –

ECO: A04
Opening Name: Modern Defense: Semi-Averbakh Variation, Pterodactyl Variation
SAN: 1. Nf3 c5 2. c4 g6 3. d4 Bg7 4. e4 Qa5+
UCI: g1f3 c7c5 c2c4 g7g6 d2d4 f8g7 e2e4 d8a5
FEN: rnb1k1nr/pp1pppbp/6p1/q1p5/2PPP3/5N2/PP3PPP/RNBQKB1R w KQkq –

ECO: A04
Opening Name: Modern Defense: Semi-Averbakh Variation, Pterodactyl Variation Accepted
SAN: 1. Nf3 g6 2. d4 Bg7 3. e4 d6 4. c4 c5 5. dxc5 Qa5+
UCI: g1f3 g7g6 d2d4 f8g7 e2e4 d7d6 c2c4 c7c5 d4c5 d8a5
FEN: rnb1k1nr/pp2ppbp/3p2p1/q1P5/2P1P3/5N2/PP3PPP/RNBQKB1R w KQkq –

ECO: A04
Opening Name: Zukertort Defense: Kingside Variation
SAN: 1. Nf3 Nh6 2. d4 g6
UCI: g1f3 g8h6 d2d4 g7g6
FEN: rnbqkb1r/pppppp1p/6pn/8/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq –

ECO: A04
Opening Name: Zukertort Defense: Sicilian Knight Variation
SAN: 1. Nf3 Na6 2. e4 c5
UCI: g1f3 b8a6 e2e4 c7c5
FEN: r1bqkbnr/pp1ppppp/n7/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq –

ECO: A04
Opening Name: Zukertort Opening
SAN: 1. Nf3
UCI: g1f3
FEN: rnbqkbnr/pppppppp/8/8/8/5N2/PPPPPPPP/RNBQKB1R b KQkq –

ECO: A04
Opening Name: Zukertort Opening: Arctic Defense
SAN: 1. Nf3 f6
UCI: g1f3 f7f6
FEN: rnbqkbnr/ppppp1pp/5p2/8/8/5N2/PPPPPPPP/RNBQKB1R w KQkq –

ECO: A04
Opening Name: Zukertort Opening: Arctic Defense, Drunken Knight Variation
SAN: 1. Nf3 f6 2. e4 Nh6 3. d4 Nf7
UCI: g1f3 f7f6 e2e4 g8h6 d2d4 h6f7
FEN: rnbqkb1r/pppppnpp/5p2/8/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq –

ECO: A04
Opening Name: Zukertort Opening: Basman Defense
SAN: 1. Nf3 h6
UCI: g1f3 h7h6
FEN: rnbqkbnr/ppppppp1/7p/8/8/5N2/PPPPPPPP/RNBQKB1R w KQkq –

ECO: A04
Opening Name: Zukertort Opening: Black Mustang Defense
SAN: 1. Nf3 Nc6
UCI: g1f3 b8c6
FEN: r1bqkbnr/pppppppp/2n5/8/8/5N2/PPPPPPPP/RNBQKB1R w KQkq –

ECO: A04
Opening Name: Zukertort Opening: Drunken Cavalry Variation
SAN: 1. Nf3 Na6 2. e4 Nh6
UCI: g1f3 b8a6 e2e4 g8h6
FEN: r1bqkb1r/pppppppp/n6n/8/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq –

ECO: A04
Opening Name: Zukertort Opening: Dutch Variation
SAN: 1. Nf3 f5
UCI: g1f3 f7f5
FEN: rnbqkbnr/ppppp1pp/8/5p2/8/5N2/PPPPPPPP/RNBQKB1R w KQkq –

ECO: A04
Opening Name: Zukertort Opening: Herrstrom Gambit
SAN: 1. Nf3 g5
UCI: g1f3 g7g5
FEN: rnbqkbnr/pppppp1p/8/6p1/8/5N2/PPPPPPPP/RNBQKB1R w KQkq –

ECO: A04
Opening Name: Zukertort Opening: Kingside Fianchetto
SAN: 1. Nf3 g6
UCI: g1f3 g7g6
FEN: rnbqkbnr/pppppp1p/6p1/8/8/5N2/PPPPPPPP/RNBQKB1R w KQkq –

ECO: A04
Opening Name: Zukertort Opening: Lisitsyn Gambit
SAN: 1. Nf3 f5 2. e4
UCI: g1f3 f7f5 e2e4
FEN: rnbqkbnr/ppppp1pp/8/5p2/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq –

ECO: A04
Opening Name: Zukertort Opening: Lisitsyn Gambit Deferred
SAN: 1. Nf3 f5 2. d3 Nf6 3. e4
UCI: g1f3 f7f5 d2d3 g8f6 e2e4
FEN: rnbqkb1r/ppppp1pp/5n2/5p2/4P3/3P1N2/PPP2PPP/RNBQKB1R b KQkq –

ECO: A04
Opening Name: Zukertort Opening: Pirc Invitation
SAN: 1. Nf3 d6
UCI: g1f3 d7d6
FEN: rnbqkbnr/ppp1pppp/3p4/8/8/5N2/PPPPPPPP/RNBQKB1R w KQkq –

ECO: A04
Opening Name: Zukertort Opening: Polish Defense
SAN: 1. Nf3 b5
UCI: g1f3 b7b5
FEN: rnbqkbnr/p1pppppp/8/1p6/8/5N2/PPPPPPPP/RNBQKB1R w KQkq –

ECO: A04
Opening Name: Zukertort Opening: Queen’s Gambit Invitation
SAN: 1. Nf3 e6
UCI: g1f3 e7e6
FEN: rnbqkbnr/pppp1ppp/4p3/8/8/5N2/PPPPPPPP/RNBQKB1R w KQkq –

ECO: A04
Opening Name: Zukertort Opening: Queenside Fianchetto Variation
SAN: 1. Nf3 b6
UCI: g1f3 b7b6
FEN: rnbqkbnr/p1pppppp/1p6/8/8/5N2/PPPPPPPP/RNBQKB1R w KQkq –

ECO: A04
Opening Name: Zukertort Opening: Ross Gambit
SAN: 1. Nf3 e5
UCI: g1f3 e7e5
FEN: rnbqkbnr/pppp1ppp/8/4p3/8/5N2/PPPPPPPP/RNBQKB1R w KQkq –

ECO: A04
Opening Name: Zukertort Opening: Shabalov Gambit
SAN: 1. Nf3 e6 2. c4 a6 3. Nc3 c5 4. g3 b5
UCI: g1f3 e7e6 c2c4 a7a6 b1c3 c7c5 g2g3 b7b5
FEN: rnbqkbnr/3p1ppp/p3p3/1pp5/2P5/2N2NP1/PP1PPP1P/R1BQKB1R w KQkq –

ECO: A04
Opening Name: Zukertort Opening: Sicilian Invitation
SAN: 1. Nf3 c5
UCI: g1f3 c7c5
FEN: rnbqkbnr/pp1ppppp/8/2p5/8/5N2/PPPPPPPP/RNBQKB1R w KQkq –

ECO: A04
Opening Name: Zukertort Opening: Slav Invitation
SAN: 1. Nf3 c6
UCI: g1f3 c7c6
FEN: rnbqkbnr/pp1ppppp/2p5/8/8/5N2/PPPPPPPP/RNBQKB1R w KQkq –

ECO: A04
Opening Name: Zukertort Opening: Speelsmet Gambit
SAN: 1. Nf3 c5 2. d4 cxd4 3. e3
UCI: g1f3 c7c5 d2d4 c5d4 e2e3
FEN: rnbqkbnr/pp1ppppp/8/8/3p4/4PN2/PPP2PPP/RNBQKB1R b KQkq –

ECO: A04
Opening Name: Zukertort Opening: St. George Defense
SAN: 1. Nf3 a6
UCI: g1f3 a7a6
FEN: rnbqkbnr/1ppppppp/p7/8/8/5N2/PPPPPPPP/RNBQKB1R w KQkq –

ECO: A04
Opening Name: Zukertort Opening: The Walrus
SAN: 1. Nf3 e5 2. Nxe5 Nc6 3. Nxc6 dxc6
UCI: g1f3 e7e5 f3e5 b8c6 e5c6 d7c6
FEN: r1bqkbnr/ppp2ppp/2p5/8/8/8/PPPPPPPP/RNBQKB1R w KQkq –

ECO: A04
Opening Name: Zukertort Opening: Vos Gambit
SAN: 1. Nf3 d6 2. d4 e5
UCI: g1f3 d7d6 d2d4 e7e5
FEN: rnbqkbnr/ppp2ppp/3p4/4p3/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq –

ECO: A04
Opening Name: Zukertort Opening: Wade Defense
SAN: 1. Nf3 d6 2. e4 Bg4
UCI: g1f3 d7d6 e2e4 c8g4
FEN: rn1qkbnr/ppp1pppp/3p4/8/4P1b1/5N2/PPPP1PPP/RNBQKB1R w KQkq –

ECO: A04
Opening Name: Zukertort Opening: Ware Defense
SAN: 1. Nf3 a5
UCI: g1f3 a7a5
FEN: rnbqkbnr/1ppppppp/8/p7/8/5N2/PPPPPPPP/RNBQKB1R w KQkq –

ECO: A05
Opening Name: King’s Indian Attack
SAN: 1. Nf3 Nf6 2. g3 d5
UCI: g1f3 g8f6 g2g3 d7d5
FEN: rnbqkb1r/ppp1pppp/5n2/3p4/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq –

ECO: A05
Opening Name: King’s Indian Attack: Smyslov Variation
SAN: 1. Nf3 Nf6 2. g3 g6 3. b4
UCI: g1f3 g8f6 g2g3 g7g6 b2b4
FEN: rnbqkb1r/pppppp1p/5np1/8/1P6/5NP1/P1PPPP1P/RNBQKB1R b KQkq –

ECO: A05
Opening Name: King’s Indian Attack: Spassky Variation
SAN: 1. Nf3 Nf6 2. g3 b5
UCI: g1f3 g8f6 g2g3 b7b5
FEN: rnbqkb1r/p1pppppp/5n2/1p6/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq –

ECO: A05
Opening Name: King’s Indian Attack: Symmetrical Defense
SAN: 1. Nf3 Nf6 2. g3 g6
UCI: g1f3 g8f6 g2g3 g7g6
FEN: rnbqkb1r/pppppp1p/5np1/8/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq –

ECO: A05
Opening Name: King’s Indian Attack: Wahls Defense
SAN: 1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. O-O O-O 5. d3 d5
UCI: g1f3 g8f6 g2g3 g7g6 f1g2 f8g7 e1g1 e8g8 d2d3 d7d5
FEN: rnbq1rk1/ppp1ppbp/5np1/3p4/8/3P1NP1/PPP1PPBP/RNBQ1RK1 w – –

ECO: A05
Opening Name: Polish Opening: Zukertort System
SAN: 1. Nf3 Nf6 2. b4
UCI: g1f3 g8f6 b2b4
FEN: rnbqkb1r/pppppppp/5n2/8/1P6/5N2/P1PPPPPP/RNBQKB1R b KQkq –

ECO: A05
Opening Name: Zukertort Opening
SAN: 1. Nf3 Nf6
UCI: g1f3 g8f6
FEN: rnbqkb1r/pppppppp/5n2/8/8/5N2/PPPPPPPP/RNBQKB1R w KQkq –

ECO: A05
Opening Name: Zukertort Opening
SAN: 1. Nf3 Nf6 2. Nc3 Nc6
UCI: g1f3 g8f6 b1c3 b8c6
FEN: r1bqkb1r/pppppppp/2n2n2/8/8/2N2N2/PPPPPPPP/R1BQKB1R w KQkq –

ECO: A05
Opening Name: Zukertort Opening: Double Fianchetto Attack
SAN: 1. Nf3 Nf6 2. g3 g6 3. b3 Bg7 4. Bb2 O-O 5. Bg2 d6 6. O-O
UCI: g1f3 g8f6 g2g3 g7g6 b2b3 f8g7 c1b2 e8g8 f1g2 d7d6 e1g1
FEN: rnbq1rk1/ppp1ppbp/3p1np1/8/8/1P3NP1/PBPPPPBP/RN1Q1RK1 b – –

ECO: A05
Opening Name: Zukertort Opening: Lemberger Gambit
SAN: 1. Nf3 Nf6 2. e4
UCI: g1f3 g8f6 e2e4
FEN: rnbqkb1r/pppppppp/5n2/8/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq –

ECO: A05
Opening Name: Zukertort Opening: Myers Polish Attack
SAN: 1. Nf3 Nf6 2. a4 g6 3. b4
UCI: g1f3 g8f6 a2a4 g7g6 b2b4
FEN: rnbqkb1r/pppppp1p/5np1/8/PP6/5N2/2PPPPPP/RNBQKB1R b KQkq –

ECO: A05
Opening Name: Zukertort Opening: Nimzo-Larsen Variation
SAN: 1. Nf3 Nf6 2. b3
UCI: g1f3 g8f6 b2b3
FEN: rnbqkb1r/pppppppp/5n2/8/8/1P3N2/P1PPPPPP/RNBQKB1R b KQkq –

ECO: A05
Opening Name: Zukertort Opening: Quiet System
SAN: 1. Nf3 Nf6 2. e3
UCI: g1f3 g8f6 e2e3
FEN: rnbqkb1r/pppppppp/5n2/8/8/4PN2/PPPP1PPP/RNBQKB1R b KQkq –

ECO: A06
Opening Name: Nimzo-Larsen Attack: Classical Variation
SAN: 1. Nf3 d5 2. b3
UCI: g1f3 d7d5 b2b3
FEN: rnbqkbnr/ppp1pppp/8/3p4/8/1P3N2/P1PPPPPP/RNBQKB1R b KQkq –

ECO: A06
Opening Name: Nimzo-Larsen Attack: Norfolk Gambit
SAN: 1. Nf3 d5 2. b3 c5 3. e4
UCI: g1f3 d7d5 b2b3 c7c5 e2e4
FEN: rnbqkbnr/pp2pppp/8/2pp4/4P3/1P3N2/P1PP1PPP/RNBQKB1R b KQkq –

ECO: A06
Opening Name: Nimzo-Larsen Attack: Norfolk Gambit
SAN: 1. Nf3 d5 2. b3 Nf6 3. Bb2 c5 4. e4
UCI: g1f3 d7d5 b2b3 g8f6 c1b2 c7c5 e2e4
FEN: rnbqkb1r/pp2pppp/5n2/2pp4/4P3/1P3N2/PBPP1PPP/RN1QKB1R b KQkq –

ECO: A06
Opening Name: Zukertort Opening
SAN: 1. Nf3 d5
UCI: g1f3 d7d5
FEN: rnbqkbnr/ppp1pppp/8/3p4/8/5N2/PPPPPPPP/RNBQKB1R w KQkq –

ECO: A06
Opening Name: Zukertort Opening: Ampel Variation
SAN: 1. Nf3 d5 2. Rg1
UCI: g1f3 d7d5 h1g1
FEN: rnbqkbnr/ppp1pppp/8/3p4/8/5N2/PPPPPPPP/RNBQKBR1 b Qkq –

ECO: A06
Opening Name: Zukertort Opening: Old Indian Attack
SAN: 1. Nf3 d5 2. d3
UCI: g1f3 d7d5 d2d3
FEN: rnbqkbnr/ppp1pppp/8/3p4/8/3P1N2/PPP1PPPP/RNBQKB1R b KQkq –

ECO: A06
Opening Name: Zukertort Opening: Pachman Gambit
SAN: 1. Nf3 d5 2. e3 c5 3. c4 dxc4 4. b3
UCI: g1f3 d7d5 e2e3 c7c5 c2c4 d5c4 b2b3
FEN: rnbqkbnr/pp2pppp/8/2p5/2p5/1P2PN2/P2P1PPP/RNBQKB1R b KQkq –

ECO: A06
Opening Name: Zukertort Opening: Regina-Nu Gambit
SAN: 1. Nf3 d5 2. b3 c5 3. c4 dxc4 4. Nc3
UCI: g1f3 d7d5 b2b3 c7c5 c2c4 d5c4 b1c3
FEN: rnbqkbnr/pp2pppp/8/2p5/2p5/1PN2N2/P2PPPPP/R1BQKB1R b KQkq –

ECO: A06
Opening Name: Zukertort Opening: Reversed Mexican Defense
SAN: 1. Nf3 d5 2. Nc3
UCI: g1f3 d7d5 b1c3
FEN: rnbqkbnr/ppp1pppp/8/3p4/8/2N2N2/PPPPPPPP/R1BQKB1R b KQkq –

ECO: A06
Opening Name: Zukertort Opening: Santasiere’s Folly
SAN: 1. b4 d5 2. Nf3
UCI: b2b4 d7d5 g1f3
FEN: rnbqkbnr/ppp1pppp/8/3p4/1P6/5N2/P1PPPPPP/RNBQKB1R b KQkq –

ECO: A06
Opening Name: Zukertort Opening: Tennison Gambit
SAN: 1. e4 d5 2. Nf3
UCI: e2e4 d7d5 g1f3
FEN: rnbqkbnr/ppp1pppp/8/3p4/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq –

ECO: A06
Opening Name: Zukertort Opening: Tennison Gambit, Brigg’s Trap
SAN: 1. e4 d5 2. Nf3 dxe4 3. Ng5 Nf6 4. Nc3 Bf5 5. Qe2 Qd4
UCI: e2e4 d7d5 g1f3 d5e4 f3g5 g8f6 b1c3 c8f5 d1e2 d8d4
FEN: rn2kb1r/ppp1pppp/5n2/5bN1/3qp3/2N5/PPPPQPPP/R1B1KB1R w KQkq –

ECO: A06
Opening Name: Zukertort Opening: The Potato
SAN: 1. Nf3 d5 2. a4
UCI: g1f3 d7d5 a2a4
FEN: rnbqkbnr/ppp1pppp/8/3p4/P7/5N2/1PPPPPPP/RNBQKB1R b KQkq –

ECO: A07
Opening Name: Hungarian Opening: Wiedenhagen-Beta Gambit
SAN: 1. g3 d5 2. Nf3 g5
UCI: g2g3 d7d5 g1f3 g7g5
FEN: rnbqkbnr/ppp1pp1p/8/3p2p1/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq –

ECO: A07
Opening Name: King’s Indian Attack
SAN: 1. Nf3 d5 2. g3
UCI: g1f3 d7d5 g2g3
FEN: rnbqkbnr/ppp1pppp/8/3p4/8/5NP1/PPPPPP1P/RNBQKB1R b KQkq –

ECO: A07
Opening Name: King’s Indian Attack: Double Fianchetto
SAN: 1. Nf3 d5 2. g3 g6
UCI: g1f3 d7d5 g2g3 g7g6
FEN: rnbqkbnr/ppp1pp1p/6p1/3p4/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq –

ECO: A07
Opening Name: King’s Indian Attack: Keres Variation
SAN: 1. Nf3 d5 2. g3 Bg4
UCI: g1f3 d7d5 g2g3 c8g4
FEN: rn1qkbnr/ppp1pppp/8/3p4/6b1/5NP1/PPPPPP1P/RNBQKB1R w KQkq –

ECO: A07
Opening Name: King’s Indian Attack: Keres Variation
SAN: 1. Nf3 d5 2. g3 Bg4 3. Bg2 Nd7
UCI: g1f3 d7d5 g2g3 c8g4 f1g2 b8d7
FEN: r2qkbnr/pppnpppp/8/3p4/6b1/5NP1/PPPPPPBP/RNBQK2R w KQkq –

ECO: A07
Opening Name: King’s Indian Attack: Omega-Delta Gambit
SAN: 1. Nf3 d5 2. g3 e5
UCI: g1f3 d7d5 g2g3 e7e5
FEN: rnbqkbnr/ppp2ppp/8/3pp3/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq –

ECO: A07
Opening Name: King’s Indian Attack: Pachman System
SAN: 1. Nf3 d5 2. g3 g6 3. Bg2 Bg7 4. O-O e5 5. d3 Ne7
UCI: g1f3 d7d5 g2g3 g7g6 f1g2 f8g7 e1g1 e7e5 d2d3 g8e7
FEN: rnbqk2r/ppp1npbp/6p1/3pp3/8/3P1NP1/PPP1PPBP/RNBQ1RK1 w kq –

ECO: A07
Opening Name: King’s Indian Attack: Sicilian Variation
SAN: 1. Nf3 d5 2. g3 c5
UCI: g1f3 d7d5 g2g3 c7c5
FEN: rnbqkbnr/pp2pppp/8/2pp4/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq –

ECO: A07
Opening Name: King’s Indian Attack: Yugoslav Variation
SAN: 1. Nf3 Nf6 2. g3 d5 3. Bg2 c6 4. O-O Bg4
UCI: g1f3 g8f6 g2g3 d7d5 f1g2 c7c6 e1g1 c8g4
FEN: rn1qkb1r/pp2pppp/2p2n2/3p4/6b1/5NP1/PPPPPPBP/RNBQ1RK1 w kq –

ECO: A08
Opening Name: King’s Indian Attack: French Variation
SAN: 1. Nf3 d5 2. g3 c5 3. Bg2 Nc6
UCI: g1f3 d7d5 g2g3 c7c5 f1g2 b8c6
FEN: r1bqkbnr/pp2pppp/2n5/2pp4/8/5NP1/PPPPPPBP/RNBQK2R w KQkq –

ECO: A08
Opening Name: King’s Indian Attack: Sicilian Variation
SAN: 1. e4 e6 2. d3 d5 3. Nd2 Nf6 4. Ngf3 c5 5. g3 Nc6 6. Bg2 Be7 7. O-O O-O 8. Re1
UCI: e2e4 e7e6 d2d3 d7d5 b1d2 g8f6 g1f3 c7c5 g2g3 b8c6 f1g2 f8e7 e1g1 e8g8 f1e1
FEN: r1bq1rk1/pp2bppp/2n1pn2/2pp4/4P3/3P1NP1/PPPN1PBP/R1BQR1K1 b – –

ECO: A08
Opening Name: King’s Indian Attack: Sicilian Variation
SAN: 1. Nf3 d5 2. g3 c5 3. Bg2
UCI: g1f3 d7d5 g2g3 c7c5 f1g2
FEN: rnbqkbnr/pp2pppp/8/2pp4/8/5NP1/PPPPPPBP/RNBQK2R b KQkq –

ECO: A08
Opening Name: King’s Indian Attack: Sicilian Variation
SAN: 1. Nf3 d5 2. g3 c5 3. Bg2 Nf6 4. O-O e6 5. d3
UCI: g1f3 d7d5 g2g3 c7c5 f1g2 g8f6 e1g1 e7e6 d2d3
FEN: rnbqkb1r/pp3ppp/4pn2/2pp4/8/3P1NP1/PPP1PPBP/RNBQ1RK1 b kq –

ECO: A08
Opening Name: Zukertort Opening: Reversed Grünfeld
SAN: 1. Nf3 d5 2. g3 c5 3. Bg2 Nc6 4. d4
UCI: g1f3 d7d5 g2g3 c7c5 f1g2 b8c6 d2d4
FEN: r1bqkbnr/pp2pppp/2n5/2pp4/3P4/5NP1/PPP1PPBP/RNBQK2R b KQkq –

ECO: A08
Opening Name: Zukertort Opening: Reversed Grünfeld
SAN: 1. Nf3 d5 2. g3 c5 3. Bg2 Nc6 4. d4 Nf6
UCI: g1f3 d7d5 g2g3 c7c5 f1g2 b8c6 d2d4 g8f6
FEN: r1bqkb1r/pp2pppp/2n2n2/2pp4/3P4/5NP1/PPP1PPBP/RNBQK2R w KQkq –

ECO: A08
Opening Name: Zukertort Opening: Reversed Grünfeld
SAN: 1. Nf3 d5 2. g3 c5 3. Bg2 Nc6 4. d4 Nf6 5. O-O
UCI: g1f3 d7d5 g2g3 c7c5 f1g2 b8c6 d2d4 g8f6 e1g1
FEN: r1bqkb1r/pp2pppp/2n2n2/2pp4/3P4/5NP1/PPP1PPBP/RNBQ1RK1 b kq –

ECO: A08
Opening Name: Zukertort Opening: Reversed Grünfeld
SAN: 1. Nf3 d5 2. g3 c5 3. Bg2 Nc6 4. d4 e6 5. O-O
UCI: g1f3 d7d5 g2g3 c7c5 f1g2 b8c6 d2d4 e7e6 e1g1
FEN: r1bqkbnr/pp3ppp/2n1p3/2pp4/3P4/5NP1/PPP1PPBP/RNBQ1RK1 b kq –

ECO: A09
Opening Name: Réti Opening
SAN: 1. Nf3 d5 2. c4
UCI: g1f3 d7d5 c2c4
FEN: rnbqkbnr/ppp1pppp/8/3p4/2P5/5N2/PP1PPPPP/RNBQKB1R b KQkq –

ECO: A09
Opening Name: Réti Opening: Advance Variation
SAN: 1. Nf3 d5 2. c4 d4
UCI: g1f3 d7d5 c2c4 d5d4
FEN: rnbqkbnr/ppp1pppp/8/8/2Pp4/5N2/PP1PPPPP/RNBQKB1R w KQkq –

ECO: A09
Opening Name: Réti Opening: Advance Variation, Michel Gambit
SAN: 1. Nf3 d5 2. c4 d4 3. b4 c5
UCI: g1f3 d7d5 c2c4 d5d4 b2b4 c7c5
FEN: rnbqkbnr/pp2pppp/8/2p5/1PPp4/5N2/P2PPPPP/RNBQKB1R w KQkq –

ECO: A09
Opening Name: Réti Opening: Penguin Variation
SAN: 1. Nf3 d5 2. c4 d4 3. Rg1
UCI: g1f3 d7d5 c2c4 d5d4 h1g1
FEN: rnbqkbnr/ppp1pppp/8/8/2Pp4/5N2/PP1PPPPP/RNBQKBR1 b Qkq –

ECO: A09
Opening Name: Réti Opening: Reversed Blumenfeld Gambit
SAN: 1. Nf3 d5 2. c4 d4 3. e3 c5 4. b4
UCI: g1f3 d7d5 c2c4 d5d4 e2e3 c7c5 b2b4
FEN: rnbqkbnr/pp2pppp/8/2p5/1PPp4/4PN2/P2P1PPP/RNBQKB1R b KQkq –

ECO: A09
Opening Name: Réti Opening: Réti Accepted
SAN: 1. Nf3 d5 2. c4 dxc4
UCI: g1f3 d7d5 c2c4 d5c4
FEN: rnbqkbnr/ppp1pppp/8/8/2p5/5N2/PP1PPPPP/RNBQKB1R w KQkq –

ECO: A09
Opening Name: Réti Opening: Réti Gambit, Keres Variation
SAN: 1. Nf3 d5 2. c4 dxc4 3. e3 Be6
UCI: g1f3 d7d5 c2c4 d5c4 e2e3 c8e6
FEN: rn1qkbnr/ppp1pppp/4b3/8/2p5/4PN2/PP1P1PPP/RNBQKB1R w KQkq –

ECO: A09
Opening Name: Réti Opening: Zilbermints Gambit
SAN: 1. Nf3 d5 2. c4 b5
UCI: g1f3 d7d5 c2c4 b7b5
FEN: rnbqkbnr/p1p1pppp/8/1p1p4/2P5/5N2/PP1PPPPP/RNBQKB1R w KQkq –

ECO: A10
Opening Name: English Opening
SAN: 1. c4
UCI: c2c4
FEN: rnbqkbnr/pppppppp/8/8/2P5/8/PP1PPPPP/RNBQKBNR b KQkq –

ECO: A10
Opening Name: English Opening: Achilles-Omega Gambit
SAN: 1. c4 Nf6 2. e4
UCI: c2c4 g8f6 e2e4
FEN: rnbqkb1r/pppppppp/5n2/8/2P1P3/8/PP1P1PPP/RNBQKBNR b KQkq –

ECO: A10
Opening Name: English Opening: Adorjan Defense
SAN: 1. c4 g6 2. e4 e5
UCI: c2c4 g7g6 e2e4 e7e5
FEN: rnbqkbnr/pppp1p1p/6p1/4p3/2P1P3/8/PP1P1PPP/RNBQKBNR w KQkq –

ECO: A10
Opening Name: English Opening: Anglo-Dutch Defense
SAN: 1. c4 f5
UCI: c2c4 f7f5
FEN: rnbqkbnr/ppppp1pp/8/5p2/2P5/8/PP1PPPPP/RNBQKBNR w KQkq –

ECO: A10
Opening Name: English Opening: Anglo-Dutch Defense, Hickmann Gambit
SAN: 1. c4 f5 2. e4
UCI: c2c4 f7f5 e2e4
FEN: rnbqkbnr/ppppp1pp/8/5p2/2P1P3/8/PP1P1PPP/RNBQKBNR b KQkq –

ECO: A10
Opening Name: English Opening: Anglo-Dutch Variation, Chabanon Gambit
SAN: 1. c4 f5 2. Nf3 d6 3. e4
UCI: c2c4 f7f5 g1f3 d7d6 e2e4
FEN: rnbqkbnr/ppp1p1pp/3p4/5p2/2P1P3/5N2/PP1P1PPP/RNBQKB1R b KQkq –

ECO: A10
Opening Name: English Opening: Anglo-Dutch Variation, Ferenc Gambit
SAN: 1. c4 f5 2. Nc3 Nf6 3. e4
UCI: c2c4 f7f5 b1c3 g8f6 e2e4
FEN: rnbqkb1r/ppppp1pp/5n2/5p2/2P1P3/2N5/PP1P1PPP/R1BQKBNR b KQkq –

ECO: A10
Opening Name: English Opening: Anglo-Lithuanian Variation
SAN: 1. c4 Nc6
UCI: c2c4 b8c6
FEN: r1bqkbnr/pppppppp/2n5/8/2P5/8/PP1PPPPP/RNBQKBNR w KQkq –

ECO: A10
Opening Name: English Opening: Anglo-Scandinavian Defense
SAN: 1. c4 d5
UCI: c2c4 d7d5
FEN: rnbqkbnr/ppp1pppp/8/3p4/2P5/8/PP1PPPPP/RNBQKBNR w KQkq –

ECO: A10
Opening Name: English Opening: Anglo-Scandinavian Defense, Löhn Gambit
SAN: 1. c4 d5 2. cxd5 e6
UCI: c2c4 d7d5 c4d5 e7e6
FEN: rnbqkbnr/ppp2ppp/4p3/3P4/8/8/PP1PPPPP/RNBQKBNR w KQkq –

ECO: A10
Opening Name: English Opening: Anglo-Scandinavian Defense, Malvinas Variation
SAN: 1. c4 d5 2. cxd5 Qxd5 3. Nc3 Qa5
UCI: c2c4 d7d5 c4d5 d8d5 b1c3 d5a5
FEN: rnb1kbnr/ppp1pppp/8/q7/8/2N5/PP1PPPPP/R1BQKBNR w KQkq –

ECO: A10
Opening Name: English Opening: Anglo-Scandinavian Defense, Schulz Gambit
SAN: 1. c4 d5 2. cxd5 Nf6
UCI: c2c4 d7d5 c4d5 g8f6
FEN: rnbqkb1r/ppp1pppp/5n2/3P4/8/8/PP1PPPPP/RNBQKBNR w KQkq –

ECO: A10
Opening Name: English Opening: Great Snake Variation
SAN: 1. c4 g6
UCI: c2c4 g7g6
FEN: rnbqkbnr/pppppp1p/6p1/8/2P5/8/PP1PPPPP/RNBQKBNR w KQkq –

ECO: A10
Opening Name: English Opening: Jaenisch Gambit
SAN: 1. c4 b5
UCI: c2c4 b7b5
FEN: rnbqkbnr/p1pppppp/8/1p6/2P5/8/PP1PPPPP/RNBQKBNR w KQkq –

ECO: A10
Opening Name: English Opening: King’s English Variation, Botvinnik System, Prickly Pawn Pass System
SAN: 1. c4 g6 2. Nc3 Bg7 3. g3 Nf6 4. Bg2 O-O 5. e4 d6 6. Nge2 e5 7. O-O c6 8. d3 a6
UCI: c2c4 g7g6 b1c3 f8g7 g2g3 g8f6 f1g2 e8g8 e2e4 d7d6 g1e2 e7e5 e1g1 c7c6 d2d3 a7a6
FEN: rnbq1rk1/1p3pbp/p1pp1np1/4p3/2P1P3/2NP2P1/PP2NPBP/R1BQ1RK1 w – –

ECO: A10
Opening Name: English Opening: Myers Defense
SAN: 1. c4 g5
UCI: c2c4 g7g5
FEN: rnbqkbnr/pppppp1p/8/6p1/2P5/8/PP1PPPPP/RNBQKBNR w KQkq –

ECO: A10
Opening Name: English Opening: Myers Gambit
SAN: 1. c4 g5 2. d4 Bg7
UCI: c2c4 g7g5 d2d4 f8g7
FEN: rnbqk1nr/ppppppbp/8/6p1/2PP4/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: A10
Opening Name: English Opening: Porcupine Variation
SAN: 1. c4 f5 2. Nc3 Nf6 3. e4 fxe4 4. g4
UCI: c2c4 f7f5 b1c3 g8f6 e2e4 f5e4 g2g4
FEN: rnbqkb1r/ppppp1pp/5n2/8/2P1p1P1/2N5/PP1P1P1P/R1BQKBNR b KQkq –

ECO: A10
Opening Name: English Opening: Wade Gambit
SAN: 1. c4 f5 2. g4
UCI: c2c4 f7f5 g2g4
FEN: rnbqkbnr/ppppp1pp/8/5p2/2P3P1/8/PP1PPP1P/RNBQKBNR b KQkq –

ECO: A10
Opening Name: English Opening: Zilbermints Gambit
SAN: 1. c4 g5 2. d4 e5
UCI: c2c4 g7g5 d2d4 e7e5
FEN: rnbqkbnr/pppp1p1p/8/4p1p1/2PP4/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: A11
Opening Name: English Opening: Caro-Kann Defensive System
SAN: 1. c4 c6
UCI: c2c4 c7c6
FEN: rnbqkbnr/pp1ppppp/2p5/8/2P5/8/PP1PPPPP/RNBQKBNR w KQkq –

ECO: A12
Opening Name: Réti Opening: Anglo-Slav Variation, Bled Variation
SAN: 1. Nf3 d5 2. b3 Nf6 3. Bb2 g6 4. c4 c6
UCI: g1f3 d7d5 b2b3 g8f6 c1b2 g7g6 c2c4 c7c6
FEN: rnbqkb1r/pp2pp1p/2p2np1/3p4/2P5/1P3N2/PB1PPPPP/RN1QKB1R w KQkq –

ECO: A12
Opening Name: Réti Opening: Anglo-Slav Variation, Bogoljubow Variation
SAN: 1. Nf3 d5 2. c4 c6 3. b3
UCI: g1f3 d7d5 c2c4 c7c6 b2b3
FEN: rnbqkbnr/pp2pppp/2p5/3p4/2P5/1P3N2/P2PPPPP/RNBQKB1R b KQkq –

ECO: A12
Opening Name: Réti Opening: Anglo-Slav Variation, Bogoljubow Variation
SAN: 1. Nf3 d5 2. c4 c6 3. b3 Bg4
UCI: g1f3 d7d5 c2c4 c7c6 b2b3 c8g4
FEN: rn1qkbnr/pp2pppp/2p5/3p4/2P3b1/1P3N2/P2PPPPP/RNBQKB1R w KQkq –

ECO: A12
Opening Name: Réti Opening: Anglo-Slav Variation, Bogoljubow Variation
SAN: 1. Nf3 Nf6 2. c4 c6 3. b3 d5 4. Bb2
UCI: g1f3 g8f6 c2c4 c7c6 b2b3 d7d5 c1b2
FEN: rnbqkb1r/pp2pppp/2p2n2/3p4/2P5/1P3N2/PB1PPPPP/RN1QKB1R b KQkq –

ECO: A12
Opening Name: Réti Opening: Anglo-Slav Variation, Capablanca Variation
SAN: 1. c4 Nf6 2. Nf3 c6 3. b3 d5 4. Bb2 Bg4
UCI: c2c4 g8f6 g1f3 c7c6 b2b3 d7d5 c1b2 c8g4
FEN: rn1qkb1r/pp2pppp/2p2n2/3p4/2P3b1/1P3N2/PB1PPPPP/RN1QKB1R w KQkq –

ECO: A12
Opening Name: Réti Opening: Anglo-Slav Variation, London Defensive System
SAN: 1. c4 Nf6 2. g3 c6 3. Nf3 d5 4. b3 Bf5
UCI: c2c4 g8f6 g2g3 c7c6 g1f3 d7d5 b2b3 c8f5
FEN: rn1qkb1r/pp2pppp/2p2n2/3p1b2/2P5/1P3NP1/P2PPP1P/RNBQKB1R w KQkq –

ECO: A12
Opening Name: Réti Opening: Anglo-Slav Variation, New York System
SAN: 1. Nf3 Nf6 2. c4 c6 3. b3 d5 4. Bb2 Bf5
UCI: g1f3 g8f6 c2c4 c7c6 b2b3 d7d5 c1b2 c8f5
FEN: rn1qkb1r/pp2pppp/2p2n2/3p1b2/2P5/1P3N2/PB1PPPPP/RN1QKB1R w KQkq –

ECO: A12
Opening Name: Réti Opening: Anglo-Slav Variation, Torre System
SAN: 1. c4 Nf6 2. g3 c6 3. Nf3 d5 4. b3 Bg4
UCI: c2c4 g8f6 g2g3 c7c6 g1f3 d7d5 b2b3 c8g4
FEN: rn1qkb1r/pp2pppp/2p2n2/3p4/2P3b1/1P3NP1/P2PPP1P/RNBQKB1R w KQkq –

ECO: A13
Opening Name: English Opening: Agincourt Defense
SAN: 1. c4 e6
UCI: c2c4 e7e6
FEN: rnbqkbnr/pppp1ppp/4p3/8/2P5/8/PP1PPPPP/RNBQKBNR w KQkq –

ECO: A13
Opening Name: English Opening: Agincourt Defense
SAN: 1. c4 e6 2. Nf3
UCI: c2c4 e7e6 g1f3
FEN: rnbqkbnr/pppp1ppp/4p3/8/2P5/5N2/PP1PPPPP/RNBQKB1R b KQkq –

ECO: A13
Opening Name: English Opening: Agincourt Defense
SAN: 1. c4 e6 2. Nf3 d5
UCI: c2c4 e7e6 g1f3 d7d5
FEN: rnbqkbnr/ppp2ppp/4p3/3p4/2P5/5N2/PP1PPPPP/RNBQKB1R w KQkq –

ECO: A13
Opening Name: English Opening: Agincourt Defense, Bogoljubow Defense
SAN: 1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Bd6
UCI: c2c4 e7e6 g1f3 d7d5 g2g3 g8f6 f1g2 f8d6
FEN: rnbqk2r/ppp2ppp/3bpn2/3p4/2P5/5NP1/PP1PPPBP/RNBQK2R w KQkq –

ECO: A13
Opening Name: English Opening: Agincourt Defense, Catalan Defense
SAN: 1. c4 e6 2. Nf3 d5 3. g3 b6 4. Bg2 Bb7 5. O-O
UCI: c2c4 e7e6 g1f3 d7d5 g2g3 b7b6 f1g2 c8b7 e1g1
FEN: rn1qkbnr/pbp2ppp/1p2p3/3p4/2P5/5NP1/PP1PPPBP/RNBQ1RK1 b kq –

ECO: A13
Opening Name: English Opening: Agincourt Defense, Catalan Defense
SAN: 1. c4 e6 2. Nf3 d5 3. g3 c5
UCI: c2c4 e7e6 g1f3 d7d5 g2g3 c7c5
FEN: rnbqkbnr/pp3ppp/4p3/2pp4/2P5/5NP1/PP1PPP1P/RNBQKB1R w KQkq –

ECO: A13
Opening Name: English Opening: Agincourt Defense, Catalan Defense Accepted
SAN: 1. c4 e6 2. Nf3 Nf6 3. g3 d5 4. Bg2 dxc4
UCI: c2c4 e7e6 g1f3 g8f6 g2g3 d7d5 f1g2 d5c4
FEN: rnbqkb1r/ppp2ppp/4pn2/8/2p5/5NP1/PP1PPPBP/RNBQK2R w KQkq –

ECO: A13
Opening Name: English Opening: Agincourt Defense, Catalan Defense, Semi-Slav Defense
SAN: 1. c4 e6 2. Nf3 Nf6 3. g3 d5 4. Bg2 c6
UCI: c2c4 e7e6 g1f3 g8f6 g2g3 d7d5 f1g2 c7c6
FEN: rnbqkb1r/pp3ppp/2p1pn2/3p4/2P5/5NP1/PP1PPPBP/RNBQK2R w KQkq –

ECO: A13
Opening Name: English Opening: Agincourt Defense, Kurajica Defense
SAN: 1. c4 e6 2. Nf3 d5 3. g3 c6
UCI: c2c4 e7e6 g1f3 d7d5 g2g3 c7c6
FEN: rnbqkbnr/pp3ppp/2p1p3/3p4/2P5/5NP1/PP1PPP1P/RNBQKB1R w KQkq –

ECO: A13
Opening Name: English Opening: Agincourt Defense, Tarrasch Defense
SAN: 1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 c5 5. b3 Nc6 6. O-O Be7
UCI: c2c4 e7e6 g1f3 d7d5 g2g3 g8f6 f1g2 c7c5 b2b3 b8c6 e1g1 f8e7
FEN: r1bqk2r/pp2bppp/2n1pn2/2pp4/2P5/1P3NP1/P2PPPBP/RNBQ1RK1 w kq –

ECO: A13
Opening Name: English Opening: Agincourt Defense, Wimpy System
SAN: 1. c4 e6 2. Nf3 Nf6 3. b3 d5 4. Bb2 c5 5. e3
UCI: c2c4 e7e6 g1f3 g8f6 b2b3 d7d5 c1b2 c7c5 e2e3
FEN: rnbqkb1r/pp3ppp/4pn2/2pp4/2P5/1P2PN2/PB1P1PPP/RN1QKB1R b KQkq –

ECO: A13
Opening Name: English Opening: Neo-Catalan
SAN: 1. c4 e6 2. Nf3 d5 3. g3 Nf6
UCI: c2c4 e7e6 g1f3 d7d5 g2g3 g8f6
FEN: rnbqkb1r/ppp2ppp/4pn2/3p4/2P5/5NP1/PP1PPP1P/RNBQKB1R w KQkq –

ECO: A13
Opening Name: English Opening: Neo-Catalan Declined
SAN: 1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Be7
UCI: c2c4 e7e6 g1f3 d7d5 g2g3 g8f6 f1g2 f8e7
FEN: rnbqk2r/ppp1bppp/4pn2/3p4/2P5/5NP1/PP1PPPBP/RNBQK2R w KQkq –

ECO: A13
Opening Name: English Opening: Romanishin Gambit
SAN: 1. c4 Nf6 2. Nf3 e6 3. g3 a6 4. Bg2 b5
UCI: c2c4 g8f6 g1f3 e7e6 g2g3 a7a6 f1g2 b7b5
FEN: rnbqkb1r/2pp1ppp/p3pn2/1p6/2P5/5NP1/PP1PPPBP/RNBQK2R w KQkq –

ECO: A14
Opening Name: English Opening: Agincourt Defense, Keres Defense
SAN: 1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Be7 5. O-O c5 6. cxd5 Nxd5 7. Nc3 Nc6
UCI: c2c4 e7e6 g1f3 d7d5 g2g3 g8f6 f1g2 f8e7 e1g1 c7c5 c4d5 f6d5 b1c3 b8c6
FEN: r1bqk2r/pp2bppp/2n1p3/2pn4/8/2N2NP1/PP1PPPBP/R1BQ1RK1 w kq –

ECO: A14
Opening Name: English Opening: Agincourt Defense, Neo-Catalan Declined
SAN: 1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Be7 5. O-O
UCI: c2c4 e7e6 g1f3 d7d5 g2g3 g8f6 f1g2 f8e7 e1g1
FEN: rnbqk2r/ppp1bppp/4pn2/3p4/2P5/5NP1/PP1PPPBP/RNBQ1RK1 b kq –

ECO: A14
Opening Name: Réti Opening: Anglo-Slav Variation, Bogoljubow Variation, Stonewall Line
SAN: 1. Nf3 d5 2. c4 e6 3. g3 Nf6 4. Bg2 Be7 5. O-O O-O 6. b3 c6 7. Bb2
UCI: g1f3 d7d5 c2c4 e7e6 g2g3 g8f6 f1g2 f8e7 e1g1 e8g8 b2b3 c7c6 c1b2
FEN: rnbq1rk1/pp2bppp/2p1pn2/3p4/2P5/1P3NP1/PB1PPPBP/RN1Q1RK1 b – –

ECO: A15
Opening Name: English Opening: Anglo-Indian Defense
SAN: 1. c4 Nf6
UCI: c2c4 g8f6
FEN: rnbqkb1r/pppppppp/5n2/8/2P5/8/PP1PPPPP/RNBQKBNR w KQkq –

ECO: A15
Opening Name: English Opening: Anglo-Indian Defense, Anti-Anti-Grünfeld
SAN: 1. c4 Nf6 2. Nc3 g6 3. Nf3 Bg7 4. e4
UCI: c2c4 g8f6 b1c3 g7g6 g1f3 f8g7 e2e4
FEN: rnbqk2r/ppppppbp/5np1/8/2P1P3/2N2N2/PP1P1PPP/R1BQKB1R b KQkq –

ECO: A15
Opening Name: English Opening: Anglo-Indian Defense, Grünfeld Formation
SAN: 1. c4 Nf6 2. Nf3 g6 3. g3 d5
UCI: c2c4 g8f6 g1f3 g7g6 g2g3 d7d5
FEN: rnbqkb1r/ppp1pp1p/5np1/3p4/2P5/5NP1/PP1PPP1P/RNBQKB1R w KQkq –

ECO: A15
Opening Name: English Opening: Anglo-Indian Defense, King’s Indian Formation
SAN: 1. c4 Nf6 2. Nf3 g6
UCI: c2c4 g8f6 g1f3 g7g6
FEN: rnbqkb1r/pppppp1p/5np1/8/2P5/5N2/PP1PPPPP/RNBQKB1R w KQkq –

ECO: A15
Opening Name: English Opening: Anglo-Indian Defense, King’s Indian Formation, Double Fianchetto
SAN: 1. c4 Nf6 2. Nf3 g6 3. g3 b6 4. Bg2 Bb7
UCI: c2c4 g8f6 g1f3 g7g6 g2g3 b7b6 f1g2 c8b7
FEN: rn1qkb1r/pbpppp1p/1p3np1/8/2P5/5NP1/PP1PPPBP/RNBQK2R w KQkq –

ECO: A15
Opening Name: English Opening: Anglo-Indian Defense, King’s Knight Variation
SAN: 1. c4 Nf6 2. Nf3
UCI: c2c4 g8f6 g1f3
FEN: rnbqkb1r/pppppppp/5n2/8/2P5/5N2/PP1PPPPP/RNBQKB1R b KQkq –

ECO: A15
Opening Name: English Opening: Anglo-Indian Defense, Old Indian Formation
SAN: 1. c4 Nf6 2. Nf3 d6
UCI: c2c4 g8f6 g1f3 d7d6
FEN: rnbqkb1r/ppp1pppp/3p1n2/8/2P5/5N2/PP1PPPPP/RNBQKB1R w KQkq –

ECO: A15
Opening Name: English Opening: Anglo-Indian Defense, Queen’s Indian Formation
SAN: 1. c4 Nf6 2. Nf3 b6
UCI: c2c4 g8f6 g1f3 b7b6
FEN: rnbqkb1r/p1pppppp/1p3n2/8/2P5/5N2/PP1PPPPP/RNBQKB1R w KQkq –

ECO: A15
Opening Name: English Opening: Anglo-Indian Defense, Queen’s Indian Formation
SAN: 1. c4 e6 2. Nf3 Nf6 3. g3 b6 4. Bg2 Bb7
UCI: c2c4 e7e6 g1f3 g8f6 g2g3 b7b6 f1g2 c8b7
FEN: rn1qkb1r/pbpp1ppp/1p2pn2/8/2P5/5NP1/PP1PPPBP/RNBQK2R w KQkq –

ECO: A15
Opening Name: English Opening: Anglo-Indian Defense, Romanishin Variation
SAN: 1. c4 e6 2. Nf3 Nf6 3. g3 a6
UCI: c2c4 e7e6 g1f3 g8f6 g2g3 a7a6
FEN: rnbqkb1r/1ppp1ppp/p3pn2/8/2P5/5NP1/PP1PPP1P/RNBQKB1R w KQkq –

ECO: A15
Opening Name: English Opening: Anglo-Indian Defense, Scandinavian Defense
SAN: 1. c4 Nf6 2. Nf3 d5
UCI: c2c4 g8f6 g1f3 d7d5
FEN: rnbqkb1r/ppp1pppp/5n2/3p4/2P5/5N2/PP1PPPPP/RNBQKB1R w KQkq –

ECO: A15
Opening Name: English Opening: Anglo-Indian Defense, Scandinavian Defense, Exchange Variation
SAN: 1. c4 Nf6 2. Nf3 d5 3. cxd5 Nxd5
UCI: c2c4 g8f6 g1f3 d7d5 c4d5 f6d5
FEN: rnbqkb1r/ppp1pppp/8/3n4/8/5N2/PP1PPPPP/RNBQKB1R w KQkq –

ECO: A15
Opening Name: English Opening: Anglo-Indian Defense, Slav Formation
SAN: 1. c4 Nf6 2. Nf3 g6 3. g3 c6
UCI: c2c4 g8f6 g1f3 g7g6 g2g3 c7c6
FEN: rnbqkb1r/pp1ppp1p/2p2np1/8/2P5/5NP1/PP1PPP1P/RNBQKB1R w KQkq –

ECO: A15
Opening Name: English Orangutan
SAN: 1. c4 Nf6 2. b4
UCI: c2c4 g8f6 b2b4
FEN: rnbqkb1r/pppppppp/5n2/8/1PP5/8/P2PPPPP/RNBQKBNR b KQkq –

ECO: A16
Opening Name: English Opening: Anglo-Grünfeld Defense
SAN: 1. c4 Nf6 2. Nc3 d5
UCI: c2c4 g8f6 b1c3 d7d5
FEN: rnbqkb1r/ppp1pppp/5n2/3p4/2P5/2N5/PP1PPPPP/R1BQKBNR w KQkq –

ECO: A16
Opening Name: English Opening: Anglo-Grünfeld Defense, Korchnoi Variation
SAN: 1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. Nf3 g6 5. g3 Bg7 6. Bg2 e5
UCI: c2c4 g8f6 b1c3 d7d5 c4d5 f6d5 g1f3 g7g6 g2g3 f8g7 f1g2 e7e5
FEN: rnbqk2r/ppp2pbp/6p1/3np3/8/2N2NP1/PP1PPPBP/R1BQK2R w KQkq –

ECO: A16
Opening Name: English Opening: Anglo-Indian Defense, Anglo-Grünfeld Variation
SAN: 1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. Nf3
UCI: c2c4 g8f6 b1c3 d7d5 c4d5 f6d5 g1f3
FEN: rnbqkb1r/ppp1pppp/8/3n4/8/2N2N2/PP1PPPPP/R1BQKB1R b KQkq –

ECO: A16
Opening Name: English Opening: Anglo-Indian Defense, Anglo-Grünfeld Variation
SAN: 1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. Nf3 g6
UCI: c2c4 g8f6 b1c3 d7d5 c4d5 f6d5 g1f3 g7g6
FEN: rnbqkb1r/ppp1pp1p/6p1/3n4/8/2N2N2/PP1PPPPP/R1BQKB1R w KQkq –

ECO: A16
Opening Name: English Opening: Anglo-Indian Defense, Anglo-Grünfeld Variation
SAN: 1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. g3 g6 5. Bg2 Nb6
UCI: c2c4 g8f6 b1c3 d7d5 c4d5 f6d5 g2g3 g7g6 f1g2 d5b6
FEN: rnbqkb1r/ppp1pp1p/1n4p1/8/8/2N3P1/PP1PPPBP/R1BQK1NR w KQkq –

ECO: A16
Opening Name: English Opening: Anglo-Indian Defense, Anglo-Grünfeld Variation
SAN: 1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. g3 g6 5. Bg2 Nxc3
UCI: c2c4 g8f6 b1c3 d7d5 c4d5 f6d5 g2g3 g7g6 f1g2 d5c3
FEN: rnbqkb1r/ppp1pp1p/6p1/8/8/2n3P1/PP1PPPBP/R1BQK1NR w KQkq –

ECO: A16
Opening Name: English Opening: Anglo-Indian Defense, Queen’s Knight Variation
SAN: 1. c4 Nf6 2. Nc3
UCI: c2c4 g8f6 b1c3
FEN: rnbqkb1r/pppppppp/5n2/8/2P5/2N5/PP1PPPPP/R1BQKBNR b KQkq –

ECO: A17
Opening Name: English Opening: Anglo-Indian Defense
SAN: 1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. Nf3 c5 5. e3 e6
UCI: c2c4 g8f6 b1c3 d7d5 c4d5 f6d5 g1f3 c7c5 e2e3 e7e6
FEN: rnbqkb1r/pp3ppp/4p3/2pn4/8/2N1PN2/PP1P1PPP/R1BQKB1R w KQkq –

ECO: A17
Opening Name: English Opening: Anglo-Indian Defense, Hedgehog System
SAN: 1. c4 Nf6 2. Nc3 e6
UCI: c2c4 g8f6 b1c3 e7e6
FEN: rnbqkb1r/pppp1ppp/4pn2/8/2P5/2N5/PP1PPPPP/R1BQKBNR w KQkq –

ECO: A17
Opening Name: English Opening: Anglo-Indian Defense, Nimzo-English
SAN: 1. c4 Nf6 2. Nc3 e6 3. Nf3 Bb4
UCI: c2c4 g8f6 b1c3 e7e6 g1f3 f8b4
FEN: rnbqk2r/pppp1ppp/4pn2/8/1bP5/2N2N2/PP1PPPPP/R1BQKB1R w KQkq –

ECO: A17
Opening Name: English Opening: Anglo-Indian Defense, Queen’s Indian Formation
SAN: 1. c4 e6 2. Nc3 Nf6 3. Nf3 b6
UCI: c2c4 e7e6 b1c3 g8f6 g1f3 b7b6
FEN: rnbqkb1r/p1pp1ppp/1p2pn2/8/2P5/2N2N2/PP1PPPPP/R1BQKB1R w KQkq –

ECO: A17
Opening Name: English Opening: Anglo-Indian Defense, Queen’s Indian Variation
SAN: 1. c4 e6 2. Nc3 Nf6 3. Nf3 b6 4. e4 Bb7 5. Bd3
UCI: c2c4 e7e6 b1c3 g8f6 g1f3 b7b6 e2e4 c8b7 f1d3
FEN: rn1qkb1r/pbpp1ppp/1p2pn2/8/2P1P3/2NB1N2/PP1P1PPP/R1BQK2R b KQkq –

ECO: A17
Opening Name: English Opening: Anglo-Indian Defense, Zvjaginsev-Krasenkow Attack
SAN: 1. c4 e6 2. Nc3 Nf6 3. Nf3 Bb4 4. g4
UCI: c2c4 e7e6 b1c3 g8f6 g1f3 f8b4 g2g4
FEN: rnbqk2r/pppp1ppp/4pn2/8/1bP3P1/2N2N2/PP1PPP1P/R1BQKB1R b KQkq –

ECO: A18
Opening Name: English Opening: Mikenas-Carls Variation
SAN: 1. c4 e6 2. Nc3 Nf6 3. e4
UCI: c2c4 e7e6 b1c3 g8f6 e2e4
FEN: rnbqkb1r/pppp1ppp/4pn2/8/2P1P3/2N5/PP1P1PPP/R1BQKBNR b KQkq –

ECO: A18
Opening Name: English Opening: Mikenas-Carls Variation
SAN: 1. c4 e6 2. Nc3 Nf6 3. e4 Nc6
UCI: c2c4 e7e6 b1c3 g8f6 e2e4 b8c6
FEN: r1bqkb1r/pppp1ppp/2n1pn2/8/2P1P3/2N5/PP1P1PPP/R1BQKBNR w KQkq –

ECO: A18
Opening Name: English Opening: Mikenas-Carls Variation
SAN: 1. c4 e6 2. Nc3 Nf6 3. e4 d5 4. e5
UCI: c2c4 e7e6 b1c3 g8f6 e2e4 d7d5 e4e5
FEN: rnbqkb1r/ppp2ppp/4pn2/3pP3/2P5/2N5/PP1P1PPP/R1BQKBNR b KQkq –

ECO: A19
Opening Name: English Opening: Anglo-Indian Defense, Flohr-Mikenas-Carls Variation, Nei Gambit
SAN: 1. c4 e6 2. Nc3 Nf6 3. e4 c5 4. e5 Ng8
UCI: c2c4 e7e6 b1c3 g8f6 e2e4 c7c5 e4e5 f6g8
FEN: rnbqkbnr/pp1p1ppp/4p3/2p1P3/2P5/2N5/PP1P1PPP/R1BQKBNR w KQkq –

ECO: A19
Opening Name: English Opening: Mikenas-Carls, Sicilian
SAN: 1. c4 e6 2. Nc3 Nf6 3. e4 c5
UCI: c2c4 e7e6 b1c3 g8f6 e2e4 c7c5
FEN: rnbqkb1r/pp1p1ppp/4pn2/2p5/2P1P3/2N5/PP1P1PPP/R1BQKBNR w KQkq –

ECO: A20
Opening Name: English Opening: Drill Variation
SAN: 1. c4 e5 2. g3 h5
UCI: c2c4 e7e5 g2g3 h7h5
FEN: rnbqkbnr/pppp1pp1/8/4p2p/2P5/6P1/PP1PPP1P/RNBQKBNR w KQkq –

ECO: A20
Opening Name: English Opening: King’s English Variation
SAN: 1. c4 e5
UCI: c2c4 e7e5
FEN: rnbqkbnr/pppp1ppp/8/4p3/2P5/8/PP1PPPPP/RNBQKBNR w KQkq –

ECO: A20
Opening Name: English Opening: King’s English Variation, Kahiko-Hula Gambit
SAN: 1. c4 e5 2. e3 Nf6 3. f4 exf4 4. Nf3
UCI: c2c4 e7e5 e2e3 g8f6 f2f4 e5f4 g1f3
FEN: rnbqkb1r/pppp1ppp/5n2/8/2P2p2/4PN2/PP1P2PP/RNBQKB1R b KQkq –

ECO: A20
Opening Name: English Opening: King’s English Variation, Nimzowitsch Variation
SAN: 1. c4 e5 2. Nf3
UCI: c2c4 e7e5 g1f3
FEN: rnbqkbnr/pppp1ppp/8/4p3/2P5/5N2/PP1PPPPP/RNBQKB1R b KQkq –

ECO: A20
Opening Name: English Opening: King’s English Variation, Nimzowitsch-Flohr Variation
SAN: 1. c4 e5 2. Nf3 e4
UCI: c2c4 e7e5 g1f3 e5e4
FEN: rnbqkbnr/pppp1ppp/8/8/2P1p3/5N2/PP1PPPPP/RNBQKB1R w KQkq –

ECO: A21
Opening Name: English Opening: King’s English Variation
SAN: 1. c4 e5 2. Nc3 d6 3. Nf3
UCI: c2c4 e7e5 b1c3 d7d6 g1f3
FEN: rnbqkbnr/ppp2ppp/3p4/4p3/2P5/2N2N2/PP1PPPPP/R1BQKB1R b KQkq –

ECO: A21
Opening Name: English Opening: King’s English Variation, Keres Defense
SAN: 1. c4 e5 2. Nc3 d6 3. g3 c6
UCI: c2c4 e7e5 b1c3 d7d6 g2g3 c7c6
FEN: rnbqkbnr/pp3ppp/2pp4/4p3/2P5/2N3P1/PP1PPP1P/R1BQKBNR w KQkq –

ECO: A21
Opening Name: English Opening: King’s English Variation, Kramnik-Shirov Counterattack
SAN: 1. c4 e5 2. Nc3 Bb4
UCI: c2c4 e7e5 b1c3 f8b4
FEN: rnbqk1nr/pppp1ppp/8/4p3/1bP5/2N5/PP1PPPPP/R1BQKBNR w KQkq –

ECO: A21
Opening Name: English Opening: King’s English Variation, Reversed Sicilian
SAN: 1. c4 e5 2. Nc3
UCI: c2c4 e7e5 b1c3
FEN: rnbqkbnr/pppp1ppp/8/4p3/2P5/2N5/PP1PPPPP/R1BQKBNR b KQkq –

ECO: A21
Opening Name: English Opening: King’s English Variation, Smyslov Defense
SAN: 1. c4 e5 2. Nc3 d6 3. Nf3 Bg4
UCI: c2c4 e7e5 b1c3 d7d6 g1f3 c8g4
FEN: rn1qkbnr/ppp2ppp/3p4/4p3/2P3b1/2N2N2/PP1PPPPP/R1BQKB1R w KQkq –

ECO: A21
Opening Name: English Opening: King’s English Variation, Troger Defense
SAN: 1. c4 e5 2. Nc3 Nc6 3. g3 d6 4. Bg2 Be6
UCI: c2c4 e7e5 b1c3 b8c6 g2g3 d7d6 f1g2 c8e6
FEN: r2qkbnr/ppp2ppp/2npb3/4p3/2P5/2N3P1/PP1PPPBP/R1BQK1NR w KQkq –

ECO: A22
Opening Name: English Opening: Carls-Bremen System
SAN: 1. c4 e5 2. Nc3 Nf6 3. g3
UCI: c2c4 e7e5 b1c3 g8f6 g2g3
FEN: rnbqkb1r/pppp1ppp/5n2/4p3/2P5/2N3P1/PP1PPP1P/R1BQKBNR b KQkq –

ECO: A22
Opening Name: English Opening: King’s English Variation, Adhiban Gambit
SAN: 1. c4 e5 2. Nc3 Nf6 3. Nf3 e4 4. Ng5 c6
UCI: c2c4 e7e5 b1c3 g8f6 g1f3 e5e4 f3g5 c7c6
FEN: rnbqkb1r/pp1p1ppp/2p2n2/6N1/2P1p3/2N5/PP1PPPPP/R1BQKB1R w KQkq –

ECO: A22
Opening Name: English Opening: King’s English Variation, Bellon Gambit
SAN: 1. c4 e5 2. Nc3 Nf6 3. Nf3 e4 4. Ng5 b5
UCI: c2c4 e7e5 b1c3 g8f6 g1f3 e5e4 f3g5 b7b5
FEN: rnbqkb1r/p1pp1ppp/5n2/1p4N1/2P1p3/2N5/PP1PPPPP/R1BQKB1R w KQkq –

ECO: A22
Opening Name: English Opening: King’s English Variation, Two Knights Variation
SAN: 1. c4 e5 2. Nc3 Nf6
UCI: c2c4 e7e5 b1c3 g8f6
FEN: rnbqkb1r/pppp1ppp/5n2/4p3/2P5/2N5/PP1PPPPP/R1BQKBNR w KQkq –

ECO: A22
Opening Name: English Opening: King’s English Variation, Two Knights Variation, Reversed Dragon
SAN: 1. c4 e5 2. Nc3 Nf6 3. g3 d5
UCI: c2c4 e7e5 b1c3 g8f6 g2g3 d7d5
FEN: rnbqkb1r/ppp2ppp/5n2/3pp3/2P5/2N3P1/PP1PPP1P/R1BQKBNR w KQkq –

ECO: A22
Opening Name: English Opening: King’s English Variation, Two Knights Variation, Smyslov System
SAN: 1. c4 e5 2. Nc3 Nf6 3. g3 Bb4
UCI: c2c4 e7e5 b1c3 g8f6 g2g3 f8b4
FEN: rnbqk2r/pppp1ppp/5n2/4p3/1bP5/2N3P1/PP1PPP1P/R1BQKBNR w KQkq –

ECO: A22
Opening Name: English Opening: King’s English, Erbenheimer Gambit
SAN: 1. c4 e5 2. Nc3 Nf6 3. Nf3 e4 4. Ng5 Ng4
UCI: c2c4 e7e5 b1c3 g8f6 g1f3 e5e4 f3g5 f6g4
FEN: rnbqkb1r/pppp1ppp/8/6N1/2P1p1n1/2N5/PP1PPPPP/R1BQKB1R w KQkq –

ECO: A22
Opening Name: English Opening: King’s English, Mazedonisch
SAN: 1. c4 e5 2. Nc3 Nf6 3. f4
UCI: c2c4 e7e5 b1c3 g8f6 f2f4
FEN: rnbqkb1r/pppp1ppp/5n2/4p3/2P2P2/2N5/PP1PP1PP/R1BQKBNR b KQkq –

ECO: A23
Opening Name: English Opening: King’s English Variation, Two Knights Variation, Keres Variation
SAN: 1. c4 e5 2. Nc3 Nf6 3. g3 c6
UCI: c2c4 e7e5 b1c3 g8f6 g2g3 c7c6
FEN: rnbqkb1r/pp1p1ppp/2p2n2/4p3/2P5/2N3P1/PP1PPP1P/R1BQKBNR w KQkq –

ECO: A23
Opening Name: English Opening: King’s English Variation, Two Knights Variation, Keres Variation
SAN: 1. c4 e5 2. Nc3 Nf6 3. g3 Bc5 4. Bg2 c6
UCI: c2c4 e7e5 b1c3 g8f6 g2g3 f8c5 f1g2 c7c6
FEN: rnbqk2r/pp1p1ppp/2p2n2/2b1p3/2P5/2N3P1/PP1PPPBP/R1BQK1NR w KQkq –

ECO: A24
Opening Name: English Opening: King’s English Variation, Two Knights Variation, Fianchetto Line
SAN: 1. c4 e5 2. Nc3 Nf6 3. g3 g6
UCI: c2c4 e7e5 b1c3 g8f6 g2g3 g7g6
FEN: rnbqkb1r/pppp1p1p/5np1/4p3/2P5/2N3P1/PP1PPP1P/R1BQKBNR w KQkq –

ECO: A25
Opening Name: English Opening: Closed, Taimanov Variation
SAN: 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Rb1 Nh6 5. Bg2 Bg7
UCI: c2c4 e7e5 b1c3 b8c6 g2g3 g7g6 a1b1 g8h6 f1g2 f8g7
FEN: r1bqk2r/pppp1pbp/2n3pn/4p3/2P5/2N3P1/PP1PPPBP/1RBQK1NR w Kkq –

ECO: A25
Opening Name: English Opening: Closed, Taimanov Variation
SAN: 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. e3 d6 6. Nge2 Nh6
UCI: c2c4 e7e5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 e2e3 d7d6 g1e2 g8h6
FEN: r1bqk2r/ppp2pbp/2np2pn/4p3/2P5/2N1P1P1/PP1PNPBP/R1BQK2R w KQkq –

ECO: A25
Opening Name: English Opening: King’s English Variation, Bremen-Hort Variation
SAN: 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. e3 d6 6. Nge2 Be6
UCI: c2c4 e7e5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 e2e3 d7d6 g1e2 c8e6
FEN: r2qk1nr/ppp2pbp/2npb1p1/4p3/2P5/2N1P1P1/PP1PNPBP/R1BQK2R w KQkq –

ECO: A25
Opening Name: English Opening: King’s English Variation, Closed System
SAN: 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3
UCI: c2c4 e7e5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 d2d3
FEN: r1bqk1nr/pppp1pbp/2n3p1/4p3/2P5/2NP2P1/PP2PPBP/R1BQK1NR b KQkq –

ECO: A25
Opening Name: English Opening: King’s English Variation, Hungarian Attack
SAN: 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Rb1
UCI: c2c4 e7e5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 a1b1
FEN: r1bqk1nr/pppp1pbp/2n3p1/4p3/2P5/2N3P1/PP1PPPBP/1RBQK1NR b Kkq –

ECO: A25
Opening Name: English Opening: King’s English Variation, Reversed Closed Sicilian
SAN: 1. c4 e5 2. Nc3 Nc6
UCI: c2c4 e7e5 b1c3 b8c6
FEN: r1bqkbnr/pppp1ppp/2n5/4p3/2P5/2N5/PP1PPPPP/R1BQKBNR w KQkq –

ECO: A25
Opening Name: English Opening: King’s English Variation, Taimanov Variation
SAN: 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7
UCI: c2c4 e7e5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7
FEN: r1bqk1nr/pppp1pbp/2n3p1/4p3/2P5/2N3P1/PP1PPPBP/R1BQK1NR w KQkq –

ECO: A26
Opening Name: English Opening: King’s English Variation, Botvinnik System
SAN: 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. e4
UCI: c2c4 e7e5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 d2d3 d7d6 e2e4
FEN: r1bqk1nr/ppp2pbp/2np2p1/4p3/2P1P3/2NP2P1/PP3PBP/R1BQK1NR b KQkq –

ECO: A26
Opening Name: English Opening: King’s English Variation, Closed System, Full Symmetry
SAN: 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6
UCI: c2c4 e7e5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 d2d3 d7d6
FEN: r1bqk1nr/ppp2pbp/2np2p1/4p3/2P5/2NP2P1/PP2PPBP/R1BQK1NR w KQkq –

ECO: A27
Opening Name: English Opening: King’s English Variation, Three Knights System
SAN: 1. c4 e5 2. Nc3 Nc6 3. Nf3
UCI: c2c4 e7e5 b1c3 b8c6 g1f3
FEN: r1bqkbnr/pppp1ppp/2n5/4p3/2P5/2N2N2/PP1PPPPP/R1BQKB1R b KQkq –

ECO: A28
Opening Name: English Opening: Four Knights System, Nimzowitsch Variation
SAN: 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. e4
UCI: c2c4 e7e5 b1c3 g8f6 g1f3 b8c6 e2e4
FEN: r1bqkb1r/pppp1ppp/2n2n2/4p3/2P1P3/2N2N2/PP1P1PPP/R1BQKB1R b KQkq –

ECO: A28
Opening Name: English Opening: King’s English Variation, Four Knights Variation
SAN: 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6
UCI: c2c4 e7e5 b1c3 g8f6 g1f3 b8c6
FEN: r1bqkb1r/pppp1ppp/2n2n2/4p3/2P5/2N2N2/PP1PPPPP/R1BQKB1R w KQkq –

ECO: A28
Opening Name: English Opening: King’s English Variation, Four Knights Variation
SAN: 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. d4 exd4 5. Nxd4 Bb4 6. Bg5 h6 7. Bh4 Bxc3+ 8. bxc3 Ne5
UCI: c2c4 e7e5 b1c3 g8f6 g1f3 b8c6 d2d4 e5d4 f3d4 f8b4 c1g5 h7h6 g5h4 b4c3 b2c3 c6e5
FEN: r1bqk2r/pppp1pp1/5n1p/4n3/2PN3B/2P5/P3PPPP/R2QKB1R w KQkq –

ECO: A28
Opening Name: English Opening: King’s English Variation, Four Knights Variation, Bradley Beach Variation
SAN: 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. d4 e4
UCI: c2c4 e7e5 b1c3 g8f6 g1f3 b8c6 d2d4 e5e4
FEN: r1bqkb1r/pppp1ppp/2n2n2/8/2PPp3/2N2N2/PP2PPPP/R1BQKB1R w KQkq –

ECO: A28
Opening Name: English Opening: King’s English Variation, Four Knights Variation, Flexible Line
SAN: 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. d3
UCI: c2c4 e7e5 b1c3 g8f6 g1f3 b8c6 d2d3
FEN: r1bqkb1r/pppp1ppp/2n2n2/4p3/2P5/2NP1N2/PP2PPPP/R1BQKB1R b KQkq –

ECO: A28
Opening Name: English Opening: King’s English Variation, Four Knights Variation, Korchnoi Line
SAN: 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. a3
UCI: c2c4 e7e5 b1c3 g8f6 g1f3 b8c6 a2a3
FEN: r1bqkb1r/pppp1ppp/2n2n2/4p3/2P5/P1N2N2/1P1PPPPP/R1BQKB1R b KQkq –

ECO: A28
Opening Name: English Opening: King’s English Variation, Four Knights Variation, Quiet Line
SAN: 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. e3
UCI: c2c4 e7e5 b1c3 g8f6 g1f3 b8c6 e2e3
FEN: r1bqkb1r/pppp1ppp/2n2n2/4p3/2P5/2N1PN2/PP1P1PPP/R1BQKB1R b KQkq –

ECO: A28
Opening Name: English Opening: King’s English Variation, Four Knights Variation, Quiet Line
SAN: 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. e3 Bb4 5. Qc2 Bxc3
UCI: c2c4 e7e5 b1c3 g8f6 g1f3 b8c6 e2e3 f8b4 d1c2 b4c3
FEN: r1bqk2r/pppp1ppp/2n2n2/4p3/2P5/2b1PN2/PPQP1PPP/R1B1KB1R w KQkq –

ECO: A28
Opening Name: English Opening: King’s English Variation, Four Knights Variation, Quiet Line
SAN: 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. e3 Bb4 5. Qc2 O-O 6. Nd5 Re8 7. Qf5
UCI: c2c4 e7e5 b1c3 g8f6 g1f3 b8c6 e2e3 f8b4 d1c2 e8g8 c3d5 f8e8 c2f5
FEN: r1bqr1k1/pppp1ppp/2n2n2/3NpQ2/1bP5/4PN2/PP1P1PPP/R1B1KB1R b KQ –

ECO: A29
Opening Name: English Opening: King’s English Variation, Four Knights Variation, Fianchetto Line
SAN: 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3
UCI: c2c4 e7e5 b1c3 g8f6 g1f3 b8c6 g2g3
FEN: r1bqkb1r/pppp1ppp/2n2n2/4p3/2P5/2N2NP1/PP1PPP1P/R1BQKB1R b KQkq –

ECO: A29
Opening Name: English Opening: King’s English Variation, Four Knights Variation, Fianchetto Line
SAN: 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Nc6
UCI: c2c4 e7e5 g2g3 g8f6 f1g2 d7d5 c4d5 f6d5 g1f3 b8c6
FEN: r1bqkb1r/ppp2ppp/2n5/3np3/8/5NP1/PP1PPPBP/RNBQK2R w KQkq –

ECO: A29
Opening Name: English Opening: King’s English Variation, Four Knights Variation, Fianchetto Line
SAN: 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Nc6 6. d3
UCI: c2c4 e7e5 g2g3 g8f6 f1g2 d7d5 c4d5 f6d5 g1f3 b8c6 d2d3
FEN: r1bqkb1r/ppp2ppp/2n5/3np3/8/3P1NP1/PP2PPBP/RNBQK2R b KQkq –

ECO: A29
Opening Name: English Opening: King’s English Variation, Four Knights Variation, Fianchetto Line
SAN: 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Nc6 6. d3 Be7 7. O-O O-O
UCI: c2c4 e7e5 g2g3 g8f6 f1g2 d7d5 c4d5 f6d5 g1f3 b8c6 d2d3 f8e7 e1g1 e8g8
FEN: r1bq1rk1/ppp1bppp/2n5/3np3/8/3P1NP1/PP2PPBP/RNBQ1RK1 w – –

ECO: A29
Opening Name: English Opening: King’s English Variation, Four Knights Variation, Fianchetto Line, Delayed .. Nc6
SAN: 1. c4 e5 2. Nc3 Nf6 3. g3 Bb4 4. Bg2 O-O 5. Nf3 Re8 6. O-O e4 7. Nd4 Nc6
UCI: c2c4 e7e5 b1c3 g8f6 g2g3 f8b4 f1g2 e8g8 g1f3 f8e8 e1g1 e5e4 f3d4 b8c6
FEN: r1bqr1k1/pppp1ppp/2n2n2/8/1bPNp3/2N3P1/PP1PPPBP/R1BQ1RK1 w – –

ECO: A29
Opening Name: English Opening: King’s English Variation, Four Knights Variation, Fianchetto Line, with Bc5
SAN: 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 d5 5. cxd5 Nxd5 6. Bg2 Bc5
UCI: c2c4 e7e5 b1c3 g8f6 g1f3 b8c6 g2g3 d7d5 c4d5 f6d5 f1g2 f8c5
FEN: r1bqk2r/ppp2ppp/2n5/2bnp3/8/2N2NP1/PP1PPPBP/R1BQK2R w KQkq –

ECO: A29
Opening Name: English Opening: King’s English Variation, Four Knights Variation, Fianchetto Line, with Nb6
SAN: 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 d5 5. cxd5 Nxd5 6. Bg2 Nb6
UCI: c2c4 e7e5 b1c3 g8f6 g1f3 b8c6 g2g3 d7d5 c4d5 f6d5 f1g2 d5b6
FEN: r1bqkb1r/ppp2ppp/1nn5/4p3/8/2N2NP1/PP1PPPBP/R1BQK2R w KQkq –

ECO: A30
Opening Name: English Opening: Symmetrical Variation
SAN: 1. c4 c5
UCI: c2c4 c7c5
FEN: rnbqkbnr/pp1ppppp/8/2p5/2P5/8/PP1PPPPP/RNBQKBNR w KQkq –

ECO: A30
Opening Name: English Opening: Symmetrical Variation
SAN: 1. c4 c5 2. Nf3
UCI: c2c4 c7c5 g1f3
FEN: rnbqkbnr/pp1ppppp/8/2p5/2P5/5N2/PP1PPPPP/RNBQKB1R b KQkq –

ECO: A30
Opening Name: English Opening: Symmetrical Variation, Hedgehog Defense
SAN: 1. c4 e6 2. Nf3 Nf6 3. Nc3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7
UCI: c2c4 e7e6 g1f3 g8f6 b1c3 c7c5 g2g3 b7b6 f1g2 c8b7 e1g1 f8e7
FEN: rn1qk2r/pb1pbppp/1p2pn2/2p5/2P5/2N2NP1/PP1PPPBP/R1BQ1RK1 w kq –

ECO: A30
Opening Name: English Opening: Symmetrical Variation, Napolitano Gambit
SAN: 1. c4 c5 2. Nf3 Nf6 3. b4
UCI: c2c4 c7c5 g1f3 g8f6 b2b4
FEN: rnbqkb1r/pp1ppppp/5n2/2p5/1PP5/5N2/P2PPPPP/RNBQKB1R b KQkq –

ECO: A30
Opening Name: English Opening: Symmetrical, Hedgehog, Flexible Formation
SAN: 1. c4 e6 2. Nf3 c5 3. Nc3 Nf6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 d6 9. Rd1 a6 10. b3 Nbd7
UCI: c2c4 e7e6 g1f3 c7c5 b1c3 g8f6 g2g3 b7b6 f1g2 c8b7 e1g1 f8e7 d2d4 c5d4 d1d4 d7d6 f1d1 a7a6 b2b3 b8d7
FEN: r2qk2r/1b1nbppp/pp1ppn2/8/2PQ4/1PN2NP1/P3PPBP/R1BR2K1 w kq –

ECO: A30
Opening Name: English Opening: Wing Gambit
SAN: 1. c4 c5 2. b4
UCI: c2c4 c7c5 b2b4
FEN: rnbqkbnr/pp1ppppp/8/2p5/1PP5/8/P2PPPPP/RNBQKBNR b KQkq –

ECO: A31
Opening Name: English Opening: Symmetrical Variation, Anti-Benoni Variation
SAN: 1. c4 Nf6 2. d4 c5 3. Nf3
UCI: c2c4 g8f6 d2d4 c7c5 g1f3
FEN: rnbqkb1r/pp1ppppp/5n2/2p5/2PP4/5N2/PP2PPPP/RNBQKB1R b KQkq –

ECO: A32
Opening Name: English Opening: Symmetrical Variation, Anti-Benoni Variation, Spielmann Defense
SAN: 1. c4 e6 2. d4 c5 3. Nf3 cxd4 4. Nxd4 Nf6
UCI: c2c4 e7e6 d2d4 c7c5 g1f3 c5d4 f3d4 g8f6
FEN: rnbqkb1r/pp1p1ppp/4pn2/8/2PN4/8/PP2PPPP/RNBQKB1R w KQkq –

ECO: A33
Opening Name: English Opening: Symmetrical Variation, Anti-Benoni Variation, Geller Variation
SAN: 1. c4 e6 2. Nf3 Nf6 3. Nc3 c5 4. d4 Nc6 5. g3 cxd4 6. Nxd4 Qb6
UCI: c2c4 e7e6 g1f3 g8f6 b1c3 c7c5 d2d4 b8c6 g2g3 c5d4 f3d4 d8b6
FEN: r1b1kb1r/pp1p1ppp/1qn1pn2/8/2PN4/2N3P1/PP2PP1P/R1BQKB1R w KQkq –

ECO: A33
Opening Name: English Opening: Symmetrical Variation, Anti-Benoni Variation, Spielmann Defense
SAN: 1. c4 e6 2. Nf3 Nf6 3. Nc3 c5 4. d4 cxd4 5. Nxd4 Nc6
UCI: c2c4 e7e6 g1f3 g8f6 b1c3 c7c5 d2d4 c5d4 f3d4 b8c6
FEN: r1bqkb1r/pp1p1ppp/2n1pn2/8/2PN4/2N5/PP2PPPP/R1BQKB1R w KQkq –

ECO: A34
Opening Name: English Opening: Symmetrical Variation
SAN: 1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. g3 d5 5. d4 cxd4
UCI: c2c4 c7c5 g1f3 g8f6 b1c3 b8c6 g2g3 d7d5 d2d4 c5d4
FEN: r1bqkb1r/pp2pppp/2n2n2/3p4/2Pp4/2N2NP1/PP2PP1P/R1BQKB1R w KQkq –

ECO: A34
Opening Name: English Opening: Symmetrical Variation, Fianchetto Variation
SAN: 1. c4 Nf6 2. Nc3 c5 3. g3
UCI: c2c4 g8f6 b1c3 c7c5 g2g3
FEN: rnbqkb1r/pp1ppppp/5n2/2p5/2P5/2N3P1/PP1PPP1P/R1BQKBNR b KQkq –

ECO: A34
Opening Name: English Opening: Symmetrical Variation, Normal Variation
SAN: 1. c4 c5 2. Nc3
UCI: c2c4 c7c5 b1c3
FEN: rnbqkbnr/pp1ppppp/8/2p5/2P5/2N5/PP1PPPPP/R1BQKBNR b KQkq –

ECO: A34
Opening Name: English Opening: Symmetrical Variation, Rubinstein Variation
SAN: 1. c4 Nf6 2. Nc3 c5 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Nc7
UCI: c2c4 g8f6 b1c3 c7c5 g2g3 d7d5 c4d5 f6d5 f1g2 d5c7
FEN: rnbqkb1r/ppn1pppp/8/2p5/8/2N3P1/PP1PPPBP/R1BQK1NR w KQkq –

ECO: A34
Opening Name: English Opening: Symmetrical Variation, Rubinstein Variation
SAN: 1. c4 c5 2. Nf3 Nf6 3. Nc3 d5 4. cxd5 Nxd5 5. g3 Nc6 6. Bg2 Nc7
UCI: c2c4 c7c5 g1f3 g8f6 b1c3 d7d5 c4d5 f6d5 g2g3 b8c6 f1g2 d5c7
FEN: r1bqkb1r/ppn1pppp/2n5/2p5/8/2N2NP1/PP1PPPBP/R1BQK2R w KQkq –

ECO: A34
Opening Name: English Opening: Symmetrical Variation, Three Knights Variation
SAN: 1. c4 c5 2. Nc3 Nf6 3. Nf3
UCI: c2c4 c7c5 b1c3 g8f6 g1f3
FEN: rnbqkb1r/pp1ppppp/5n2/2p5/2P5/2N2N2/PP1PPPPP/R1BQKB1R b KQkq –

ECO: A35
Opening Name: English Opening: Symmetrical Variation
SAN: 1. c4 c5 2. Nc3 Nf6 3. Nf3 e5
UCI: c2c4 c7c5 b1c3 g8f6 g1f3 e7e5
FEN: rnbqkb1r/pp1p1ppp/5n2/2p1p3/2P5/2N2N2/PP1PPPPP/R1BQKB1R w KQkq –

ECO: A35
Opening Name: English Opening: Symmetrical Variation, Four Knights Variation
SAN: 1. c4 Nf6 2. Nf3 c5 3. Nc3 Nc6
UCI: c2c4 g8f6 g1f3 c7c5 b1c3 b8c6
FEN: r1bqkb1r/pp1ppppp/2n2n2/2p5/2P5/2N2N2/PP1PPPPP/R1BQKB1R w KQkq –

ECO: A35
Opening Name: English Opening: Symmetrical Variation, Two Knights Variation
SAN: 1. c4 c5 2. Nc3 Nc6
UCI: c2c4 c7c5 b1c3 b8c6
FEN: r1bqkbnr/pp1ppppp/2n5/2p5/2P5/2N5/PP1PPPPP/R1BQKBNR w KQkq –

ECO: A36
Opening Name: English Opening: Symmetrical Variation, Botvinnik System
SAN: 1. c4 c5 2. e4 Nc6 3. Nc3 g6 4. g3 Bg7 5. Bg2
UCI: c2c4 c7c5 e2e4 b8c6 b1c3 g7g6 g2g3 f8g7 f1g2
FEN: r1bqk1nr/pp1pppbp/2n3p1/2p5/2P1P3/2N3P1/PP1P1PBP/R1BQK1NR b KQkq –

ECO: A36
Opening Name: English Opening: Symmetrical Variation, Botvinnik System Reversed, with e3
SAN: 1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. e3 e5
UCI: c2c4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 e2e3 e7e5
FEN: r1bqk1nr/pp1p1pbp/2n3p1/2p1p3/2P5/2N1P1P1/PP1P1PBP/R1BQK1NR w KQkq –

ECO: A36
Opening Name: English Opening: Symmetrical Variation, Two Knights, Fianchetto Variation
SAN: 1. c4 c5 2. Nc3 Nc6 3. g3
UCI: c2c4 c7c5 b1c3 b8c6 g2g3
FEN: r1bqkbnr/pp1ppppp/2n5/2p5/2P5/2N3P1/PP1PPP1P/R1BQKBNR b KQkq –

ECO: A36
Opening Name: English Opening: Symmetrical Variation, Ultra-Symmetrical Variation
SAN: 1. c4 c5 2. g3 g6 3. Bg2 Bg7 4. Nc3 Nc6
UCI: c2c4 c7c5 g2g3 g7g6 f1g2 f8g7 b1c3 b8c6
FEN: r1bqk1nr/pp1pppbp/2n3p1/2p5/2P5/2N3P1/PP1PPPBP/R1BQK1NR w KQkq –

ECO: A37
Opening Name: English Opening: Symmetrical Variation, Botvinnik System Reversed, with Nf3
SAN: 1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 e5
UCI: c2c4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 g1f3 e7e5
FEN: r1bqk1nr/pp1p1pbp/2n3p1/2p1p3/2P5/2N2NP1/PP1PPPBP/R1BQK2R w KQkq –

ECO: A37
Opening Name: English Opening: Symmetrical Variation, Three Knights, Fianchetto Variation
SAN: 1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3
UCI: c2c4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 g1f3
FEN: r1bqk1nr/pp1pppbp/2n3p1/2p5/2P5/2N2NP1/PP1PPPBP/R1BQK2R b KQkq –

ECO: A38
Opening Name: English Opening: Symmetrical Variation, Double Fianchetto
SAN: 1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 Nf6 6. O-O O-O 7. b3
UCI: c2c4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 g1f3 g8f6 e1g1 e8g8 b2b3
FEN: r1bq1rk1/pp1pppbp/2n2np1/2p5/2P5/1PN2NP1/P2PPPBP/R1BQ1RK1 b – –

ECO: A38
Opening Name: English Opening: Symmetrical Variation, Duchamp Variation
SAN: 1. c4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O c5 6. Nc3 Nc6 7. d3
UCI: c2c4 g8f6 g1f3 g7g6 g2g3 f8g7 f1g2 e8g8 e1g1 c7c5 b1c3 b8c6 d2d3
FEN: r1bq1rk1/pp1pppbp/2n2np1/2p5/2P5/2NP1NP1/PP2PPBP/R1BQ1RK1 b – –

ECO: A38
Opening Name: English Opening: Symmetrical Variation, Full Symmetry Line
SAN: 1. c4 Nf6 2. Nf3 c5 3. Nc3 Nc6 4. g3 g6 5. Bg2 Bg7
UCI: c2c4 g8f6 g1f3 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7
FEN: r1bqk2r/pp1pppbp/2n2np1/2p5/2P5/2N2NP1/PP1PPPBP/R1BQK2R w KQkq –

ECO: A39
Opening Name: English Opening: Symmetrical Variation, Mecking Variation
SAN: 1. c4 Nf6 2. Nf3 c5 3. Nc3 Nc6 4. g3 g6 5. Bg2 Bg7 6. O-O O-O 7. d4
UCI: c2c4 g8f6 g1f3 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 e1g1 e8g8 d2d4
FEN: r1bq1rk1/pp1pppbp/2n2np1/2p5/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 b – –

ECO: A40
Opening Name: Australian Defense
SAN: 1. d4 Na6
UCI: d2d4 b8a6
FEN: r1bqkbnr/pppppppp/n7/8/3P4/8/PPP1PPPP/RNBQKBNR w KQkq –

ECO: A40
Opening Name: Benoni Defense: Franco-Sicilian Hybrid
SAN: 1. d4 e6 2. c4 c5 3. d5 exd5 4. cxd5 d6 5. Nc3 g6 6. e4 Bg7 7. Nf3 Ne7
UCI: d2d4 e7e6 c2c4 c7c5 d4d5 e6d5 c4d5 d7d6 b1c3 g7g6 e2e4 f8g7 g1f3 g8e7
FEN: rnbqk2r/pp2npbp/3p2p1/2pP4/4P3/2N2N2/PP3PPP/R1BQKB1R w KQkq –

ECO: A40
Opening Name: Borg Defense: Borg Gambit
SAN: 1. d4 g5
UCI: d2d4 g7g5
FEN: rnbqkbnr/pppppp1p/8/6p1/3P4/8/PPP1PPPP/RNBQKBNR w KQkq –

ECO: A40
Opening Name: Colle System: Pterodactyl Variation
SAN: 1. d4 g6 2. Nf3 Bg7 3. e3 c5 4. Bd3 Qa5+
UCI: d2d4 g7g6 g1f3 f8g7 e2e3 c7c5 f1d3 d8a5
FEN: rnb1k1nr/pp1pppbp/6p1/q1p5/3P4/3BPN2/PPP2PPP/RNBQK2R w KQkq –

ECO: A40
Opening Name: Colle System: Siroccopteryx Variation
SAN: 1. d4 g6 2. Nf3 Bg7 3. e3 c5 4. Bd3 cxd4 5. Nxd4 Qa5+
UCI: d2d4 g7g6 g1f3 f8g7 e2e3 c7c5 f1d3 c5d4 f3d4 d8a5
FEN: rnb1k1nr/pp1pppbp/6p1/q7/3N4/3BP3/PPP2PPP/RNBQK2R w KQkq –

ECO: A40
Opening Name: English Defense
SAN: 1. d4 b6
UCI: d2d4 b7b6
FEN: rnbqkbnr/p1pppppp/1p6/8/3P4/8/PPP1PPPP/RNBQKBNR w KQkq –

ECO: A40
Opening Name: English Defense
SAN: 1. d4 e6 2. c4 b6
UCI: d2d4 e7e6 c2c4 b7b6
FEN: rnbqkbnr/p1pp1ppp/1p2p3/8/2PP4/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: A40
Opening Name: English Defense: Eastbourne Gambit
SAN: 1. d4 b6 2. c4 Bb7 3. Nc3 e5
UCI: d2d4 b7b6 c2c4 c8b7 b1c3 e7e5
FEN: rn1qkbnr/pbpp1ppp/1p6/4p3/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq –

ECO: A40
Opening Name: English Defense: Hartlaub Gambit Accepted
SAN: 1. c4 e6 2. d4 b6 3. Nc3 Bb7 4. e4 f5 5. exf5 Nf6
UCI: c2c4 e7e6 d2d4 b7b6 b1c3 c8b7 e2e4 f7f5 e4f5 g8f6
FEN: rn1qkb1r/pbpp2pp/1p2pn2/5P2/2PP4/2N5/PP3PPP/R1BQKBNR w KQkq –

ECO: A40
Opening Name: English Defense: Hartlaub Gambit Declined
SAN: 1. c4 e6 2. d4 b6 3. Nc3 Bb7 4. e4 f5 5. d5
UCI: c2c4 e7e6 d2d4 b7b6 b1c3 c8b7 e2e4 f7f5 d4d5
FEN: rn1qkbnr/pbpp2pp/1p2p3/3P1p2/2P1P3/2N5/PP3PPP/R1BQKBNR b KQkq –

ECO: A40
Opening Name: English Defense: Perrin Variation
SAN: 1. d4 e6 2. c4 b6 3. e4 Bb7 4. Bd3 Nc6
UCI: d2d4 e7e6 c2c4 b7b6 e2e4 c8b7 f1d3 b8c6
FEN: r2qkbnr/pbpp1ppp/1pn1p3/8/2PPP3/3B4/PP3PPP/RNBQK1NR w KQkq –

ECO: A40
Opening Name: English Defense: Poli Gambit
SAN: 1. d4 e6 2. c4 b6 3. e4 Bb7 4. f3 f5 5. exf5 Nh6
UCI: d2d4 e7e6 c2c4 b7b6 e2e4 c8b7 f2f3 f7f5 e4f5 g8h6
FEN: rn1qkb1r/pbpp2pp/1p2p2n/5P2/2PP4/5P2/PP4PP/RNBQKBNR w KQkq –

ECO: A40
Opening Name: Englund Gambit
SAN: 1. d4 e5
UCI: d2d4 e7e5
FEN: rnbqkbnr/pppp1ppp/8/4p3/3P4/8/PPP1PPPP/RNBQKBNR w KQkq –

ECO: A40
Opening Name: Englund Gambit Declined
SAN: 1. d4 e5 2. d5
UCI: d2d4 e7e5 d4d5
FEN: rnbqkbnr/pppp1ppp/8/3Pp3/8/8/PPP1PPPP/RNBQKBNR b KQkq –

ECO: A40
Opening Name: Englund Gambit Declined: Diemer Counterattack
SAN: 1. d4 e5 2. d5 Bc5 3. e4 Qh4
UCI: d2d4 e7e5 d4d5 f8c5 e2e4 d8h4
FEN: rnb1k1nr/pppp1ppp/8/2bPp3/4P2q/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: A40
Opening Name: Englund Gambit Declined: Reversed Alekhine
SAN: 1. d4 e5 2. Nf3
UCI: d2d4 e7e5 g1f3
FEN: rnbqkbnr/pppp1ppp/8/4p3/3P4/5N2/PPP1PPPP/RNBQKB1R b KQkq –

ECO: A40
Opening Name: Englund Gambit Declined: Reversed Brooklyn
SAN: 1. d4 e5 2. Nf3 e4 3. Ng1
UCI: d2d4 e7e5 g1f3 e5e4 f3g1
FEN: rnbqkbnr/pppp1ppp/8/8/3Pp3/8/PPP1PPPP/RNBQKBNR b KQkq –

ECO: A40
Opening Name: Englund Gambit Declined: Reversed French
SAN: 1. d4 e5 2. e3
UCI: d2d4 e7e5 e2e3
FEN: rnbqkbnr/pppp1ppp/8/4p3/3P4/4P3/PPP2PPP/RNBQKBNR b KQkq –

ECO: A40
Opening Name: Englund Gambit Declined: Reversed Krebs
SAN: 1. d4 e5 2. Nf3 e4
UCI: d2d4 e7e5 g1f3 e5e4
FEN: rnbqkbnr/pppp1ppp/8/8/3Pp3/5N2/PPP1PPPP/RNBQKB1R w KQkq –

ECO: A40
Opening Name: Englund Gambit Declined: Reversed Mokele Mbembe
SAN: 1. d4 e5 2. Nf3 e4 3. Ne5
UCI: d2d4 e7e5 g1f3 e5e4 f3e5
FEN: rnbqkbnr/pppp1ppp/8/4N3/3Pp3/8/PPP1PPPP/RNBQKB1R b KQkq –

ECO: A40
Opening Name: Englund Gambit: Felbecker Gambit
SAN: 1. d4 e5 2. dxe5 Nc6 3. Nf3 Bc5
UCI: d2d4 e7e5 d4e5 b8c6 g1f3 f8c5
FEN: r1bqk1nr/pppp1ppp/2n5/2b1P3/8/5N2/PPP1PPPP/RNBQKB1R w KQkq –

ECO: A40
Opening Name: Englund Gambit: Hartlaub-Charlick Gambit
SAN: 1. d4 e5 2. dxe5 d6
UCI: d2d4 e7e5 d4e5 d7d6
FEN: rnbqkbnr/ppp2ppp/3p4/4P3/8/8/PPP1PPPP/RNBQKBNR w KQkq –

ECO: A40
Opening Name: Englund Gambit: Main Line
SAN: 1. d4 e5 2. dxe5 Nc6 3. Nf3 Qe7
UCI: d2d4 e7e5 d4e5 b8c6 g1f3 d8e7
FEN: r1b1kbnr/ppppqppp/2n5/4P3/8/5N2/PPP1PPPP/RNBQKB1R w KQkq –

ECO: A40
Opening Name: Englund Gambit: Mosquito Gambit
SAN: 1. d4 e5 2. dxe5 Qh4
UCI: d2d4 e7e5 d4e5 d8h4
FEN: rnb1kbnr/pppp1ppp/8/4P3/7q/8/PPP1PPPP/RNBQKBNR w KQkq –

ECO: A40
Opening Name: Englund Gambit: Soller Gambit
SAN: 1. d4 e5 2. dxe5 f6
UCI: d2d4 e7e5 d4e5 f7f6
FEN: rnbqkbnr/pppp2pp/5p2/4P3/8/8/PPP1PPPP/RNBQKBNR w KQkq –

ECO: A40
Opening Name: Englund Gambit: Soller Gambit Deferred
SAN: 1. d4 e5 2. dxe5 Nc6 3. Nf3 f6
UCI: d2d4 e7e5 d4e5 b8c6 g1f3 f7f6
FEN: r1bqkbnr/pppp2pp/2n2p2/4P3/8/5N2/PPP1PPPP/RNBQKB1R w KQkq –

ECO: A40
Opening Name: Englund Gambit: Stockholm Variation
SAN: 1. d4 e5 2. dxe5 Nc6 3. Nf3 Qe7 4. Qd5
UCI: d2d4 e7e5 d4e5 b8c6 g1f3 d8e7 d1d5
FEN: r1b1kbnr/ppppqppp/2n5/3QP3/8/5N2/PPP1PPPP/RNB1KB1R b KQkq –

ECO: A40
Opening Name: Englund Gambit: Zilbermints Gambit
SAN: 1. d4 e5 2. dxe5 Nc6 3. Nf3 Nge7
UCI: d2d4 e7e5 d4e5 b8c6 g1f3 g8e7
FEN: r1bqkb1r/ppppnppp/2n5/4P3/8/5N2/PPP1PPPP/RNBQKB1R w KQkq –

ECO: A40
Opening Name: Horwitz Defense
SAN: 1. d4 e6
UCI: d2d4 e7e6
FEN: rnbqkbnr/pppp1ppp/4p3/8/3P4/8/PPP1PPPP/RNBQKBNR w KQkq –

ECO: A40
Opening Name: Horwitz Defense: Zilbermints Gambit
SAN: 1. d4 e6 2. c4 e5
UCI: d2d4 e7e6 c2c4 e6e5
FEN: rnbqkbnr/pppp1ppp/8/4p3/2PP4/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: A40
Opening Name: Kangaroo Defense
SAN: 1. d4 e6 2. c4 Bb4+
UCI: d2d4 e7e6 c2c4 f8b4
FEN: rnbqk1nr/pppp1ppp/4p3/8/1bPP4/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: A40
Opening Name: Kangaroo Defense: Keres Defense, Transpositional Variation
SAN: 1. d4 e6 2. c4 Bb4+ 3. Nc3
UCI: d2d4 e7e6 c2c4 f8b4 b1c3
FEN: rnbqk1nr/pppp1ppp/4p3/8/1bPP4/2N5/PP2PPPP/R1BQKBNR b KQkq –

ECO: A40
Opening Name: Mikenas Defense
SAN: 1. d4 Nc6
UCI: d2d4 b8c6
FEN: r1bqkbnr/pppppppp/2n5/8/3P4/8/PPP1PPPP/RNBQKBNR w KQkq –

ECO: A40
Opening Name: Mikenas Defense: Cannstatter Variation
SAN: 1. d4 Nc6 2. c4 e5 3. d5 Nd4
UCI: d2d4 b8c6 c2c4 e7e5 d4d5 c6d4
FEN: r1bqkbnr/pppp1ppp/8/3Pp3/2Pn4/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: A40
Opening Name: Mikenas Defense: Lithuanian Variation
SAN: 1. d4 Nc6 2. c4 e5 3. d5 Nce7
UCI: d2d4 b8c6 c2c4 e7e5 d4d5 c6e7
FEN: r1bqkbnr/ppppnppp/8/3Pp3/2P5/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: A40
Opening Name: Mikenas Defense: Pozarek Gambit
SAN: 1. d4 Nc6 2. c4 e5 3. dxe5 Nxe5 4. Nc3 Nxc4
UCI: d2d4 b8c6 c2c4 e7e5 d4e5 c6e5 b1c3 e5c4
FEN: r1bqkbnr/pppp1ppp/8/8/2n5/2N5/PP2PPPP/R1BQKBNR w KQkq –

ECO: A40
Opening Name: Modern Defense: Beefeater Variation
SAN: 1. d4 g6 2. c4 Bg7 3. Nc3 c5 4. d5 Bxc3+ 5. bxc3 f5
UCI: d2d4 g7g6 c2c4 f8g7 b1c3 c7c5 d4d5 g7c3 b2c3 f7f5
FEN: rnbqk1nr/pp1pp2p/6p1/2pP1p2/2P5/2P5/P3PPPP/R1BQKBNR w KQkq –

ECO: A40
Opening Name: Modern Defense: Lizard Defense, Pirc-Diemer Gambit
SAN: 1. d4 g6 2. h4 Nf6 3. h5
UCI: d2d4 g7g6 h2h4 g8f6 h4h5
FEN: rnbqkb1r/pppppp1p/5np1/7P/3P4/8/PPP1PPP1/RNBQKBNR b KQkq –

ECO: A40
Opening Name: Montevideo Defense
SAN: 1. d4 Nc6 2. d5 Nb8
UCI: d2d4 b8c6 d4d5 c6b8
FEN: rnbqkbnr/pppppppp/8/3P4/8/8/PPP1PPPP/RNBQKBNR w KQkq –

ECO: A40
Opening Name: Polish Defense
SAN: 1. d4 b5
UCI: d2d4 b7b5
FEN: rnbqkbnr/p1pppppp/8/1p6/3P4/8/PPP1PPPP/RNBQKBNR w KQkq –

ECO: A40
Opening Name: Polish Defense: Spassky Gambit Accepted
SAN: 1. d4 b5 2. e4 Bb7 3. Bxb5
UCI: d2d4 b7b5 e2e4 c8b7 f1b5
FEN: rn1qkbnr/pbpppppp/8/1B6/3PP3/8/PPP2PPP/RNBQK1NR b KQkq –

ECO: A40
Opening Name: Pterodactyl Defense: Central, Benoni Beefeater Pterodactyl
SAN: 1. d4 g6 2. c4 Bg7 3. Nc3 c5 4. d5 d6 5. e4 Bxc3+ 6. bxc3 Qa5
UCI: d2d4 g7g6 c2c4 f8g7 b1c3 c7c5 d4d5 d7d6 e2e4 g7c3 b2c3 d8a5
FEN: rnb1k1nr/pp2pp1p/3p2p1/q1pP4/2P1P3/2P5/P4PPP/R1BQKBNR w KQkq –

ECO: A40
Opening Name: Pterodactyl Defense: Central, Benoni Pterodactyl
SAN: 1. d4 g6 2. c4 Bg7 3. e4 c5 4. d5 Qa5+
UCI: d2d4 g7g6 c2c4 f8g7 e2e4 c7c5 d4d5 d8a5
FEN: rnb1k1nr/pp1pppbp/6p1/q1pP4/2P1P3/8/PP3PPP/RNBQKBNR w KQkq –

ECO: A40
Opening Name: Pterodactyl Defense: Fianchetto, Queen Benoni Pterodactyl
SAN: 1. d4 g6 2. c4 Bg7 3. Nc3 c5 4. d5 Qa5
UCI: d2d4 g7g6 c2c4 f8g7 b1c3 c7c5 d4d5 d8a5
FEN: rnb1k1nr/pp1pppbp/6p1/q1pP4/2P5/2N5/PP2PPPP/R1BQKBNR w KQkq –

ECO: A40
Opening Name: Pterodactyl Defense: Fianchetto, Queen Pteranodon
SAN: 1. d4 g6 2. c4 Bg7 3. Nc3 c5 4. d5 Bxc3+ 5. bxc3 Qa5
UCI: d2d4 g7g6 c2c4 f8g7 b1c3 c7c5 d4d5 g7c3 b2c3 d8a5
FEN: rnb1k1nr/pp1ppp1p/6p1/q1pP4/2P5/2P5/P3PPPP/R1BQKBNR w KQkq –

ECO: A40
Opening Name: Pterodactyl Defense: Fianchetto, Queen Pterodactyl
SAN: 1. d4 g6 2. Nf3 Bg7 3. g3 c5 4. Bg2 Qa5+
UCI: d2d4 g7g6 g1f3 f8g7 g2g3 c7c5 f1g2 d8a5
FEN: rnb1k1nr/pp1pppbp/6p1/q1p5/3P4/5NP1/PPP1PPBP/RNBQK2R w KQkq –

ECO: A40
Opening Name: Pterodactyl Defense: Queen Pterodactyl, Quiet Line
SAN: 1. d4 g6 2. c4 Bg7 3. Nc3 c5 4. e3
UCI: d2d4 g7g6 c2c4 f8g7 b1c3 c7c5 e2e3
FEN: rnbqk1nr/pp1pppbp/6p1/2p5/2PP4/2N1P3/PP3PPP/R1BQKBNR b KQkq –

ECO: A40
Opening Name: Queen’s Pawn Game
SAN: 1. d4
UCI: d2d4
FEN: rnbqkbnr/pppppppp/8/8/3P4/8/PPP1PPPP/RNBQKBNR b KQkq –

ECO: A40
Opening Name: Queen’s Pawn Game: Anglo-Slav Opening
SAN: 1. d4 c6 2. c4 d6
UCI: d2d4 c7c6 c2c4 d7d6
FEN: rnbqkbnr/pp2pppp/2pp4/8/2PP4/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: A40
Opening Name: Queen’s Pawn Game: Modern Defense
SAN: 1. d4 g6
UCI: d2d4 g7g6
FEN: rnbqkbnr/pppppp1p/6p1/8/3P4/8/PPP1PPPP/RNBQKBNR w KQkq –

ECO: A40
Opening Name: Slav Indian: Kudischewitsch Gambit
SAN: 1. d4 c6 2. Nf3 Nf6 3. c4 b5
UCI: d2d4 c7c6 g1f3 g8f6 c2c4 b7b5
FEN: rnbqkb1r/p2ppppp/2p2n2/1p6/2PP4/5N2/PP2PPPP/RNBQKB1R w KQkq –

ECO: A40
Opening Name: Zaire Defense
SAN: 1. d4 Nc6 2. d5 Nb8 3. e4 Nf6 4. e5 Ng8
UCI: d2d4 b8c6 d4d5 c6b8 e2e4 g8f6 e4e5 f6g8
FEN: rnbqkbnr/pppppppp/8/3PP3/8/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: A41
Opening Name: Modern Defense
SAN: 1. d4 g6 2. c4 Bg7 3. Nc3 d6
UCI: d2d4 g7g6 c2c4 f8g7 b1c3 d7d6
FEN: rnbqk1nr/ppp1ppbp/3p2p1/8/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq –

ECO: A41
Opening Name: Modern Defense: Neo-Modern Defense
SAN: 1. d4 g6 2. c4 Bg7 3. e4 e5
UCI: d2d4 g7g6 c2c4 f8g7 e2e4 e7e5
FEN: rnbqk1nr/pppp1pbp/6p1/4p3/2PPP3/8/PP3PPP/RNBQKBNR w KQkq –

ECO: A41
Opening Name: Old Indian Defense
SAN: 1. d4 d6 2. c4
UCI: d2d4 d7d6 c2c4
FEN: rnbqkbnr/ppp1pppp/3p4/8/2PP4/8/PP2PPPP/RNBQKBNR b KQkq –

ECO: A41
Opening Name: Queen’s Pawn Game
SAN: 1. d4 d6
UCI: d2d4 d7d6
FEN: rnbqkbnr/ppp1pppp/3p4/8/3P4/8/PPP1PPPP/RNBQKBNR w KQkq –

ECO: A41
Opening Name: Rat Defense: English Rat
SAN: 1. d4 d6 2. c4 e5
UCI: d2d4 d7d6 c2c4 e7e5
FEN: rnbqkbnr/ppp2ppp/3p4/4p3/2PP4/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: A41
Opening Name: Rat Defense: English Rat, Lisbon Gambit
SAN: 1. d4 d6 2. c4 e5 3. dxe5 Nc6
UCI: d2d4 d7d6 c2c4 e7e5 d4e5 b8c6
FEN: r1bqkbnr/ppp2ppp/2np4/4P3/2P5/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: A41
Opening Name: Rat Defense: English Rat, Pounds Gambit
SAN: 1. d4 d6 2. c4 e5 3. dxe5 Be6
UCI: d2d4 d7d6 c2c4 e7e5 d4e5 c8e6
FEN: rn1qkbnr/ppp2ppp/3pb3/4P3/2P5/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: A41
Opening Name: Robatsch Defense
SAN: 1. d4 d6 2. Nf3 g6 3. c4 Bg7 4. e4 Bg4
UCI: d2d4 d7d6 g1f3 g7g6 c2c4 f8g7 e2e4 c8g4
FEN: rn1qk1nr/ppp1ppbp/3p2p1/8/2PPP1b1/5N2/PP3PPP/RNBQKB1R w KQkq –

ECO: A41
Opening Name: Wade Defense
SAN: 1. d4 d6 2. Nf3 Bg4
UCI: d2d4 d7d6 g1f3 c8g4
FEN: rn1qkbnr/ppp1pppp/3p4/8/3P2b1/5N2/PPP1PPPP/RNBQKB1R w KQkq –

ECO: A41
Opening Name: Zukertort Opening: Wade Defense, Chigorin Plan
SAN: 1. d4 d6 2. Nf3 Bg4 3. c4 Nd7 4. Qb3 Rb8
UCI: d2d4 d7d6 g1f3 c8g4 c2c4 b8d7 d1b3 a8b8
FEN: 1r1qkbnr/pppnpppp/3p4/8/2PP2b1/1Q3N2/PP2PPPP/RNB1KB1R w KQk –

ECO: A42
Opening Name: Modern Defense: Averbakh System
SAN: 1. d4 g6 2. c4 Bg7 3. Nc3 d6 4. e4
UCI: d2d4 g7g6 c2c4 f8g7 b1c3 d7d6 e2e4
FEN: rnbqk1nr/ppp1ppbp/3p2p1/8/2PPP3/2N5/PP3PPP/R1BQKBNR b KQkq –

ECO: A42
Opening Name: Modern Defense: Averbakh Variation, Pseudo-Sämisch
SAN: 1. d4 g6 2. c4 Bg7 3. e4 d6 4. Be3 Nf6 5. f3
UCI: d2d4 g7g6 c2c4 f8g7 e2e4 d7d6 c1e3 g8f6 f2f3
FEN: rnbqk2r/ppp1ppbp/3p1np1/8/2PPP3/4BP2/PP4PP/RN1QKBNR b KQkq –

ECO: A42
Opening Name: Modern Defense: Kotov Variation
SAN: 1. d4 g6 2. c4 Bg7 3. Nc3 d6 4. e4 Nc6
UCI: d2d4 g7g6 c2c4 f8g7 b1c3 d7d6 e2e4 b8c6
FEN: r1bqk1nr/ppp1ppbp/2np2p1/8/2PPP3/2N5/PP3PPP/R1BQKBNR w KQkq –

ECO: A42
Opening Name: Modern Defense: Randspringer Variation
SAN: 1. d4 g6 2. c4 Bg7 3. Nc3 d6 4. e4 f5
UCI: d2d4 g7g6 c2c4 f8g7 b1c3 d7d6 e2e4 f7f5
FEN: rnbqk1nr/ppp1p1bp/3p2p1/5p2/2PPP3/2N5/PP3PPP/R1BQKBNR w KQkq –

ECO: A42
Opening Name: Pterodactyl Defense
SAN: 1. Nf3 c5 2. c4 g6 3. d4 Bg7 4. e4 Qa5+ 5. Nc3 d6
UCI: g1f3 c7c5 c2c4 g7g6 d2d4 f8g7 e2e4 d8a5 b1c3 d7d6
FEN: rnb1k1nr/pp2ppbp/3p2p1/q1p5/2PPP3/2N2N2/PP3PPP/R1BQKB1R w KQkq –

ECO: A42
Opening Name: Pterodactyl Defense: Central, Bogolubovia
SAN: 1. d4 g6 2. c4 Bg7 3. e4 d6 4. Nc3 c5 5. Nge2 Qa5
UCI: d2d4 g7g6 c2c4 f8g7 e2e4 d7d6 b1c3 c7c5 g1e2 d8a5
FEN: rnb1k1nr/pp2ppbp/3p2p1/q1p5/2PPP3/2N5/PP2NPPP/R1BQKB1R w KQkq –

ECO: A43
Opening Name: Benoni Defense: Benoni Gambit Accepted
SAN: 1. d4 c5 2. dxc5
UCI: d2d4 c7c5 d4c5
FEN: rnbqkbnr/pp1ppppp/8/2P5/8/8/PPP1PPPP/RNBQKBNR b KQkq –

ECO: A43
Opening Name: Benoni Defense: Benoni Gambit, Schlenker Defense
SAN: 1. d4 c5 2. dxc5 Na6
UCI: d2d4 c7c5 d4c5 b8a6
FEN: r1bqkbnr/pp1ppppp/n7/2P5/8/8/PPP1PPPP/RNBQKBNR w KQkq –

ECO: A43
Opening Name: Benoni Defense: Benoni-Indian Defense
SAN: 1. d4 c5 2. d5 Nf6
UCI: d2d4 c7c5 d4d5 g8f6
FEN: rnbqkb1r/pp1ppppp/5n2/2pP4/8/8/PPP1PPPP/RNBQKBNR w KQkq –

ECO: A43
Opening Name: Benoni Defense: Benoni-Indian Defense, Kingside Move Order
SAN: 1. d4 c5 2. d5 Nf6 3. Nf3
UCI: d2d4 c7c5 d4d5 g8f6 g1f3
FEN: rnbqkb1r/pp1ppppp/5n2/2pP4/8/5N2/PPP1PPPP/RNBQKB1R b KQkq –

ECO: A43
Opening Name: Benoni Defense: Benoni-Staunton Gambit
SAN: 1. d4 c5 2. d5 f5 3. e4
UCI: d2d4 c7c5 d4d5 f7f5 e2e4
FEN: rnbqkbnr/pp1pp1pp/8/2pP1p2/4P3/8/PPP2PPP/RNBQKBNR b KQkq –

ECO: A43
Opening Name: Benoni Defense: Cormorant Gambit
SAN: 1. d4 c5 2. dxc5 b6
UCI: d2d4 c7c5 d4c5 b7b6
FEN: rnbqkbnr/p2ppppp/1p6/2P5/8/8/PPP1PPPP/RNBQKBNR w KQkq –

ECO: A43
Opening Name: Benoni Defense: French Benoni
SAN: 1. e4 e6 2. d4 c5 3. d5
UCI: e2e4 e7e6 d2d4 c7c5 d4d5
FEN: rnbqkbnr/pp1p1ppp/4p3/2pP4/4P3/8/PPP2PPP/RNBQKBNR b KQkq –

ECO: A43
Opening Name: Benoni Defense: Hawk Variation
SAN: 1. d4 Nf6 2. Nf3 c5 3. d5 c4
UCI: d2d4 g8f6 g1f3 c7c5 d4d5 c5c4
FEN: rnbqkb1r/pp1ppppp/5n2/3P4/2p5/5N2/PPP1PPPP/RNBQKB1R w KQkq –

ECO: A43
Opening Name: Benoni Defense: Old Benoni
SAN: 1. d4 c5
UCI: d2d4 c7c5
FEN: rnbqkbnr/pp1ppppp/8/2p5/3P4/8/PPP1PPPP/RNBQKBNR w KQkq –

ECO: A43
Opening Name: Benoni Defense: Old Benoni
SAN: 1. d4 c5 2. d5
UCI: d2d4 c7c5 d4d5
FEN: rnbqkbnr/pp1ppppp/8/2pP4/8/8/PPP1PPPP/RNBQKBNR b KQkq –

ECO: A43
Opening Name: Benoni Defense: Old Benoni
SAN: 1. d4 c5 2. d5 d6
UCI: d2d4 c7c5 d4d5 d7d6
FEN: rnbqkbnr/pp2pppp/3p4/2pP4/8/8/PPP1PPPP/RNBQKBNR w KQkq –

ECO: A43
Opening Name: Benoni Defense: Old Benoni, Mujannah Formation
SAN: 1. d4 c5 2. d5 f5
UCI: d2d4 c7c5 d4d5 f7f5
FEN: rnbqkbnr/pp1pp1pp/8/2pP1p2/8/8/PPP1PPPP/RNBQKBNR w KQkq –

ECO: A43
Opening Name: Benoni Defense: Old Benoni, Schmid Variation
SAN: 1. d4 c5 2. d5 d6 3. Nc3 g6
UCI: d2d4 c7c5 d4d5 d7d6 b1c3 g7g6
FEN: rnbqkbnr/pp2pp1p/3p2p1/2pP4/8/2N5/PPP1PPPP/R1BQKBNR w KQkq –

ECO: A43
Opening Name: Benoni Defense: Snail Variation
SAN: 1. d4 c5 2. d5 Na6
UCI: d2d4 c7c5 d4d5 b8a6
FEN: r1bqkbnr/pp1ppppp/n7/2pP4/8/8/PPP1PPPP/RNBQKBNR w KQkq –

ECO: A43
Opening Name: Benoni Defense: Woozle
SAN: 1. d4 c5 2. d5 Nf6 3. Nc3 Qa5
UCI: d2d4 c7c5 d4d5 g8f6 b1c3 d8a5
FEN: rnb1kb1r/pp1ppppp/5n2/q1pP4/8/2N5/PPP1PPPP/R1BQKBNR w KQkq –

ECO: A43
Opening Name: Benoni Defense: Zilbermints-Benoni Gambit
SAN: 1. d4 c5 2. b4
UCI: d2d4 c7c5 b2b4
FEN: rnbqkbnr/pp1ppppp/8/2p5/1P1P4/8/P1P1PPPP/RNBQKBNR b KQkq –

ECO: A43
Opening Name: Benoni Defense: Zilbermints-Benoni Gambit
SAN: 1. d4 c5 2. Nf3 cxd4 3. b4
UCI: d2d4 c7c5 g1f3 c5d4 b2b4
FEN: rnbqkbnr/pp1ppppp/8/8/1P1p4/5N2/P1P1PPPP/RNBQKB1R b KQkq –

ECO: A43
Opening Name: Benoni Defense: Zilbermints-Benoni Gambit, Tamarkin Countergambit
SAN: 1. d4 c5 2. Nf3 cxd4 3. b4 e5
UCI: d2d4 c7c5 g1f3 c5d4 b2b4 e7e5
FEN: rnbqkbnr/pp1p1ppp/8/4p3/1P1p4/5N2/P1P1PPPP/RNBQKB1R w KQkq –

ECO: A43
Opening Name: Indian Defense: Pseudo-Benko
SAN: 1. d4 Nf6 2. Nf3 c5 3. d5 b5
UCI: d2d4 g8f6 g1f3 c7c5 d4d5 b7b5
FEN: rnbqkb1r/p2ppppp/5n2/1ppP4/8/5N2/PPP1PPPP/RNBQKB1R w KQkq –

ECO: A43
Opening Name: Queen’s Pawn Game: Liedmann Gambit
SAN: 1. d4 c5 2. c4 cxd4 3. e3
UCI: d2d4 c7c5 c2c4 c5d4 e2e3
FEN: rnbqkbnr/pp1ppppp/8/8/2Pp4/4P3/PP3PPP/RNBQKBNR b KQkq –

ECO: A44
Opening Name: Benoni Defense: Old Benoni
SAN: 1. d4 c5 2. d5 e5
UCI: d2d4 c7c5 d4d5 e7e5
FEN: rnbqkbnr/pp1p1ppp/8/2pPp3/8/8/PPP1PPPP/RNBQKBNR w KQkq e6

ECO: A44
Opening Name: Benoni Defense: Semi-Benoni
SAN: 1. d4 c5 2. d5 e5 3. e4 d6
UCI: d2d4 c7c5 d4d5 e7e5 e2e4 d7d6
FEN: rnbqkbnr/pp3ppp/3p4/2pPp3/4P3/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: A45
Opening Name: Amazon Attack: Siberian Attack
SAN: 1. d4 Nf6 2. Nc3 d5 3. Qd3
UCI: d2d4 g8f6 b1c3 d7d5 d1d3
FEN: rnbqkb1r/ppp1pppp/5n2/3p4/3P4/2NQ4/PPP1PPPP/R1B1KBNR b KQkq –

ECO: A45
Opening Name: Canard Opening
SAN: 1. d4 Nf6 2. f4
UCI: d2d4 g8f6 f2f4
FEN: rnbqkb1r/pppppppp/5n2/8/3P1P2/8/PPP1P1PP/RNBQKBNR b KQkq –

ECO: A45
Opening Name: Indian Defense
SAN: 1. d4 Nf6
UCI: d2d4 g8f6
FEN: rnbqkb1r/pppppppp/5n2/8/3P4/8/PPP1PPPP/RNBQKBNR w KQkq –

ECO: A45
Opening Name: Indian Defense: Gedult Attack, Gedult Attack
SAN: 1. d4 Nf6 2. f3 d5 3. g4
UCI: d2d4 g8f6 f2f3 d7d5 g2g4
FEN: rnbqkb1r/ppp1pppp/5n2/3p4/3P2P1/5P2/PPP1P2P/RNBQKBNR b KQkq –

ECO: A45
Opening Name: Indian Defense: Gibbins-Weidenhagen Gambit
SAN: 1. d4 Nf6 2. g4
UCI: d2d4 g8f6 g2g4
FEN: rnbqkb1r/pppppppp/5n2/8/3P2P1/8/PPP1PP1P/RNBQKBNR b KQkq –

ECO: A45
Opening Name: Indian Defense: Gibbins-Weidenhagen Gambit Accepted
SAN: 1. d4 Nf6 2. g4 Nxg4
UCI: d2d4 g8f6 g2g4 f6g4
FEN: rnbqkb1r/pppppppp/8/8/3P2n1/8/PPP1PP1P/RNBQKBNR w KQkq –

ECO: A45
Opening Name: Indian Defense: Gibbins-Weidenhagen Gambit, Maltese Falcon
SAN: 1. d4 Nf6 2. g4 Nxg4 3. f3 Nf6 4. e4
UCI: d2d4 g8f6 g2g4 f6g4 f2f3 g4f6 e2e4
FEN: rnbqkb1r/pppppppp/5n2/8/3PP3/5P2/PPP4P/RNBQKBNR b KQkq –

ECO: A45
Opening Name: Indian Defense: Gibbins-Weidenhagen Gambit, Oshima Defense
SAN: 1. d4 Nf6 2. g4 e5
UCI: d2d4 g8f6 g2g4 e7e5
FEN: rnbqkb1r/pppp1ppp/5n2/4p3/3P2P1/8/PPP1PP1P/RNBQKBNR w KQkq –

ECO: A45
Opening Name: Indian Defense: Gibbins-Weidenhagen Gambit, Stummer Gambit
SAN: 1. d4 Nf6 2. g4 Nxg4 3. e4 d6 4. Be2 Nf6 5. Nc3
UCI: d2d4 g8f6 g2g4 f6g4 e2e4 d7d6 f1e2 g4f6 b1c3
FEN: rnbqkb1r/ppp1pppp/3p1n2/8/3PP3/2N5/PPP1BP1P/R1BQK1NR b KQkq –

ECO: A45
Opening Name: Indian Defense: Lazard Gambit
SAN: 1. d4 Nf6 2. Nd2 e5
UCI: d2d4 g8f6 b1d2 e7e5
FEN: rnbqkb1r/pppp1ppp/5n2/4p3/3P4/8/PPPNPPPP/R1BQKBNR w KQkq –

ECO: A45
Opening Name: Indian Defense: Maddigan Gambit
SAN: 1. d4 Nf6 2. Nc3 e5
UCI: d2d4 g8f6 b1c3 e7e5
FEN: rnbqkb1r/pppp1ppp/5n2/4p3/3P4/2N5/PPP1PPPP/R1BQKBNR w KQkq –

ECO: A45
Opening Name: Indian Defense: Omega Gambit
SAN: 1. d4 Nf6 2. e4
UCI: d2d4 g8f6 e2e4
FEN: rnbqkb1r/pppppppp/5n2/8/3PP3/8/PPP2PPP/RNBQKBNR b KQkq –

ECO: A45
Opening Name: Indian Defense: Omega Gambit, Arafat Gambit
SAN: 1. d4 Nf6 2. e4 Nxe4 3. Bd3 Nf6 4. Bg5
UCI: d2d4 g8f6 e2e4 f6e4 f1d3 e4f6 c1g5
FEN: rnbqkb1r/pppppppp/5n2/6B1/3P4/3B4/PPP2PPP/RN1QK1NR b KQkq –

ECO: A45
Opening Name: Indian Defense: Paleface Attack, Blackmar-Diemer Gambit Deferred
SAN: 1. d4 Nf6 2. f3 d5 3. e4
UCI: d2d4 g8f6 f2f3 d7d5 e2e4
FEN: rnbqkb1r/ppp1pppp/5n2/3p4/3PP3/5P2/PPP3PP/RNBQKBNR b KQkq –

ECO: A45
Opening Name: Indian Defense: Pawn Push Variation
SAN: 1. d4 Nf6 2. d5
UCI: d2d4 g8f6 d4d5
FEN: rnbqkb1r/pppppppp/5n2/3P4/8/8/PPP1PPPP/RNBQKBNR b KQkq –

ECO: A45
Opening Name: Indian Defense: Reversed Chigorin Defense
SAN: 1. d4 Nf6 2. Nc3 c5
UCI: d2d4 g8f6 b1c3 c7c5
FEN: rnbqkb1r/pp1ppppp/5n2/2p5/3P4/2N5/PPP1PPPP/R1BQKBNR w KQkq –

ECO: A45
Opening Name: Indian Defense: Tartakower Attack
SAN: 1. d4 Nf6 2. g3
UCI: d2d4 g8f6 g2g3
FEN: rnbqkb1r/pppppppp/5n2/8/3P4/6P1/PPP1PP1P/RNBQKBNR b KQkq –

ECO: A45
Opening Name: Paleface Attack
SAN: 1. d4 Nf6 2. f3
UCI: d2d4 g8f6 f2f3
FEN: rnbqkb1r/pppppppp/5n2/8/3P4/5P2/PPP1P1PP/RNBQKBNR b KQkq –

ECO: A45
Opening Name: Queen’s Pawn Game: Chigorin Variation
SAN: 1. d4 Nf6 2. Nc3 d5
UCI: d2d4 g8f6 b1c3 d7d5
FEN: rnbqkb1r/ppp1pppp/5n2/3p4/3P4/2N5/PPP1PPPP/R1BQKBNR w KQkq –

ECO: A45
Opening Name: Queen’s Pawn Game: Veresov, Richter Attack
SAN: 1. d4 Nf6 2. f3 d5 3. Nc3
UCI: d2d4 g8f6 f2f3 d7d5 b1c3
FEN: rnbqkb1r/ppp1pppp/5n2/3p4/3P4/2N2P2/PPP1P1PP/R1BQKBNR b KQkq –

ECO: A45
Opening Name: Trompowsky Attack
SAN: 1. d4 Nf6 2. Bg5
UCI: d2d4 g8f6 c1g5
FEN: rnbqkb1r/pppppppp/5n2/6B1/3P4/8/PPP1PPPP/RN1QKBNR b KQkq –

ECO: A45
Opening Name: Trompowsky Attack: Borg Variation
SAN: 1. d4 Nf6 2. Bg5 Ne4 3. Bf4 g5
UCI: d2d4 g8f6 c1g5 f6e4 g5f4 g7g5
FEN: rnbqkb1r/pppppp1p/8/6p1/3PnB2/8/PPP1PPPP/RN1QKBNR w KQkq –

ECO: A45
Opening Name: Trompowsky Attack: Classical Defense
SAN: 1. d4 Nf6 2. Bg5 e6
UCI: d2d4 g8f6 c1g5 e7e6
FEN: rnbqkb1r/pppp1ppp/4pn2/6B1/3P4/8/PPP1PPPP/RN1QKBNR w KQkq –

ECO: A45
Opening Name: Trompowsky Attack: Classical Defense, Big Center Variation
SAN: 1. d4 Nf6 2. Bg5 e6 3. e4
UCI: d2d4 g8f6 c1g5 e7e6 e2e4
FEN: rnbqkb1r/pppp1ppp/4pn2/6B1/3PP3/8/PPP2PPP/RN1QKBNR b KQkq –

ECO: A45
Opening Name: Trompowsky Attack: Edge Variation
SAN: 1. d4 Nf6 2. Bg5 Ne4 3. Bh4
UCI: d2d4 g8f6 c1g5 f6e4 g5h4
FEN: rnbqkb1r/pppppppp/8/8/3Pn2B/8/PPP1PPPP/RN1QKBNR b KQkq –

ECO: A45
Opening Name: Trompowsky Attack: Edge Variation, Hergert Gambit
SAN: 1. d4 Nf6 2. Bg5 Ne4 3. Bh4 c6 4. Nd2 Qa5 5. c3 Nxd2 6. Qxd2 d5 7. e4
UCI: d2d4 g8f6 c1g5 f6e4 g5h4 c7c6 b1d2 d8a5 c2c3 e4d2 d1d2 d7d5 e2e4
FEN: rnb1kb1r/pp2pppp/2p5/q2p4/3PP2B/2P5/PP1Q1PPP/R3KBNR b KQkq –

ECO: A45
Opening Name: Trompowsky Attack: Edge Variation, Hergert Gambit
SAN: 1. d4 Nf6 2. Bg5 Ne4 3. Bh4 d5 4. f3 Nf6 5. Nc3 Bf5 6. e4
UCI: d2d4 g8f6 c1g5 f6e4 g5h4 d7d5 f2f3 e4f6 b1c3 c8f5 e2e4
FEN: rn1qkb1r/ppp1pppp/5n2/3p1b2/3PP2B/2N2P2/PPP3PP/R2QKBNR b KQkq –

ECO: A45
Opening Name: Trompowsky Attack: Poisoned Pawn Variation
SAN: 1. d4 Nf6 2. Bg5 c5 3. d5 Qb6 4. Nc3
UCI: d2d4 g8f6 c1g5 c7c5 d4d5 d8b6 b1c3
FEN: rnb1kb1r/pp1ppppp/1q3n2/2pP2B1/8/2N5/PPP1PPPP/R2QKBNR b KQkq –

ECO: A45
Opening Name: Trompowsky Attack: Raptor Variation
SAN: 1. d4 Nf6 2. Bg5 Ne4 3. h4
UCI: d2d4 g8f6 c1g5 f6e4 h2h4
FEN: rnbqkb1r/pppppppp/8/6B1/3Pn2P/8/PPP1PPP1/RN1QKBNR b KQkq –

ECO: A45
Opening Name: Trompowsky Attack: Raptor Variation, Hergert Gambit
SAN: 1. d4 Nf6 2. Bg5 Ne4 3. h4 Nxg5 4. hxg5 e5
UCI: d2d4 g8f6 c1g5 f6e4 h2h4 e4g5 h4g5 e7e5
FEN: rnbqkb1r/pppp1ppp/8/4p1P1/3P4/8/PPP1PPP1/RN1QKBNR w KQkq –

ECO: A46
Opening Name: Döry Defense
SAN: 1. d4 Nf6 2. Nf3 Ne4
UCI: d2d4 g8f6 g1f3 f6e4
FEN: rnbqkb1r/pppppppp/8/8/3Pn3/5N2/PPP1PPPP/RNBQKB1R w KQkq –

ECO: A46
Opening Name: Indian Defense: Czech-Indian
SAN: 1. d4 Nf6 2. Nf3 c6
UCI: d2d4 g8f6 g1f3 c7c6
FEN: rnbqkb1r/pp1ppppp/2p2n2/8/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq –

ECO: A46
Opening Name: Indian Defense: Knights Variation
SAN: 1. d4 Nf6 2. Nf3
UCI: d2d4 g8f6 g1f3
FEN: rnbqkb1r/pppppppp/5n2/8/3P4/5N2/PPP1PPPP/RNBQKB1R b KQkq –

ECO: A46
Opening Name: Indian Defense: Knights Variation, Alburt-Miles Variation
SAN: 1. d4 Nf6 2. Nf3 a6
UCI: d2d4 g8f6 g1f3 a7a6
FEN: rnbqkb1r/1ppppppp/p4n2/8/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq –

ECO: A46
Opening Name: Indian Defense: London System
SAN: 1. d4 Nf6 2. Nf3 e6 3. Bf4
UCI: d2d4 g8f6 g1f3 e7e6 c1f4
FEN: rnbqkb1r/pppp1ppp/4pn2/8/3P1B2/5N2/PPP1PPPP/RN1QKB1R b KQkq –

ECO: A46
Opening Name: Indian Defense: Polish Variation
SAN: 1. d4 Nf6 2. Nf3 b5
UCI: d2d4 g8f6 g1f3 b7b5
FEN: rnbqkb1r/p1pppppp/5n2/1p6/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq –

ECO: A46
Opening Name: Indian Defense: Spielmann-Indian
SAN: 1. d4 Nf6 2. Nf3 c5
UCI: d2d4 g8f6 g1f3 c7c5
FEN: rnbqkb1r/pp1ppppp/5n2/2p5/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq –

ECO: A46
Opening Name: Indian Defense: Wade-Tartakower Defense
SAN: 1. d4 Nf6 2. Nf3 d6
UCI: d2d4 g8f6 g1f3 d7d6
FEN: rnbqkb1r/ppp1pppp/3p1n2/8/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq –

ECO: A46
Opening Name: Queen’s Pawn Game: Torre Attack, Breyer Variation
SAN: 1. d4 Nf6 2. Nf3 e6 3. Bg5 d5 4. e3 c5 5. c3 Qb6
UCI: d2d4 g8f6 g1f3 e7e6 c1g5 d7d5 e2e3 c7c5 c2c3 d8b6
FEN: rnb1kb1r/pp3ppp/1q2pn2/2pp2B1/3P4/2P1PN2/PP3PPP/RN1QKB1R w KQkq –

ECO: A46
Opening Name: Queen’s Pawn Game: Veresov Attack, Classical Defense
SAN: 1. d4 Nf6 2. Nf3 e6 3. Nc3 d5 4. Bg5
UCI: d2d4 g8f6 g1f3 e7e6 b1c3 d7d5 c1g5
FEN: rnbqkb1r/ppp2ppp/4pn2/3p2B1/3P4/2N2N2/PPP1PPPP/R2QKB1R b KQkq –

ECO: A46
Opening Name: Torre Attack: Classical Defense
SAN: 1. d4 Nf6 2. Nf3 e6 3. Bg5
UCI: d2d4 g8f6 g1f3 e7e6 c1g5
FEN: rnbqkb1r/pppp1ppp/4pn2/6B1/3P4/5N2/PPP1PPPP/RN1QKB1R b KQkq –

ECO: A46
Opening Name: Torre Attack: Classical Defense, Nimzowitsch Variation
SAN: 1. d4 Nf6 2. Nf3 e6 3. Bg5 h6
UCI: d2d4 g8f6 g1f3 e7e6 c1g5 h7h6
FEN: rnbqkb1r/pppp1pp1/4pn1p/6B1/3P4/5N2/PPP1PPPP/RN1QKB1R w KQkq –

ECO: A46
Opening Name: Torre Attack: Classical Defense, Petrosian Gambit
SAN: 1. d4 Nf6 2. Nf3 e6 3. Bg5 c5 4. e3 b6 5. d5
UCI: d2d4 g8f6 g1f3 e7e6 c1g5 c7c5 e2e3 b7b6 d4d5
FEN: rnbqkb1r/p2p1ppp/1p2pn2/2pP2B1/8/4PN2/PPP2PPP/RN1QKB1R b KQkq –

ECO: A46
Opening Name: Torre Attack: Wagner Gambit
SAN: 1. d4 Nf6 2. Nf3 e6 3. Bg5 c5 4. e4
UCI: d2d4 g8f6 g1f3 e7e6 c1g5 c7c5 e2e4
FEN: rnbqkb1r/pp1p1ppp/4pn2/2p3B1/3PP3/5N2/PPP2PPP/RN1QKB1R b KQkq –

ECO: A46
Opening Name: Yusupov-Rubinstein System
SAN: 1. d4 Nf6 2. Nf3 e6 3. e3
UCI: d2d4 g8f6 g1f3 e7e6 e2e3
FEN: rnbqkb1r/pppp1ppp/4pn2/8/3P4/4PN2/PPP2PPP/RNBQKB1R b KQkq –

ECO: A47
Opening Name: Indian Defense: Schnepper Gambit
SAN: 1. d4 Nf6 2. Nf3 b6 3. c3 e5
UCI: d2d4 g8f6 g1f3 b7b6 c2c3 e7e5
FEN: rnbqkb1r/p1pp1ppp/1p3n2/4p3/3P4/2P2N2/PP2PPPP/RNBQKB1R w KQkq –

ECO: A47
Opening Name: Marienbad System
SAN: 1. d4 Nf6 2. Nf3 b6 3. g3 Bb7 4. Bg2 c5
UCI: d2d4 g8f6 g1f3 b7b6 g2g3 c8b7 f1g2 c7c5
FEN: rn1qkb1r/pb1ppppp/1p3n2/2p5/3P4/5NP1/PPP1PPBP/RNBQK2R w KQkq –

ECO: A47
Opening Name: Marienbad System: Berg Variation
SAN: 1. d4 Nf6 2. Nf3 b6 3. g3 Bb7 4. Bg2 c5 5. c4 cxd4 6. Qxd4
UCI: d2d4 g8f6 g1f3 b7b6 g2g3 c8b7 f1g2 c7c5 c2c4 c5d4 d1d4
FEN: rn1qkb1r/pb1ppppp/1p3n2/8/2PQ4/5NP1/PP2PPBP/RNB1K2R b KQkq –

ECO: A47
Opening Name: Pseudo Queen’s Indian Defense
SAN: 1. d4 Nf6 2. Nf3 b6
UCI: d2d4 g8f6 g1f3 b7b6
FEN: rnbqkb1r/p1pppppp/1p3n2/8/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq –

ECO: A48
Opening Name: East Indian Defense
SAN: 1. d4 Nf6 2. Nf3 g6
UCI: d2d4 g8f6 g1f3 g7g6
FEN: rnbqkb1r/pppppp1p/5np1/8/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq –

ECO: A48
Opening Name: Indian Defense: Colle System, King’s Indian Variation
SAN: 1. d4 Nf6 2. Nf3 g6 3. e3 Bg7 4. Bd3 d6
UCI: d2d4 g8f6 g1f3 g7g6 e2e3 f8g7 f1d3 d7d6
FEN: rnbqk2r/ppp1ppbp/3p1np1/8/3P4/3BPN2/PPP2PPP/RNBQK2R w KQkq –

ECO: A48
Opening Name: London System
SAN: 1. d4 Nf6 2. Nf3 g6 3. Bf4
UCI: d2d4 g8f6 g1f3 g7g6 c1f4
FEN: rnbqkb1r/pppppp1p/5np1/8/3P1B2/5N2/PPP1PPPP/RN1QKB1R b KQkq –

ECO: A48
Opening Name: Queen’s Pawn Game: Barry Attack
SAN: 1. d4 Nf6 2. Nf3 g6 3. Nc3 d5 4. Bf4
UCI: d2d4 g8f6 g1f3 g7g6 b1c3 d7d5 c1f4
FEN: rnbqkb1r/ppp1pp1p/5np1/3p4/3P1B2/2N2N2/PPP1PPPP/R2QKB1R b KQkq –

ECO: A48
Opening Name: Queen’s Pawn Game: Barry Attack
SAN: 1. d4 Nf6 2. Nf3 g6 3. Nc3 d5 4. Bf4 Bg7
UCI: d2d4 g8f6 g1f3 g7g6 b1c3 d7d5 c1f4 f8g7
FEN: rnbqk2r/ppp1ppbp/5np1/3p4/3P1B2/2N2N2/PPP1PPPP/R2QKB1R w KQkq –

ECO: A48
Opening Name: Queen’s Pawn Game: Barry Attack, Grünfeld Variation
SAN: 1. d4 Nf6 2. Nf3 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 O-O 6. Be2
UCI: d2d4 g8f6 g1f3 g7g6 b1c3 d7d5 c1f4 f8g7 e2e3 e8g8 f1e2
FEN: rnbq1rk1/ppp1ppbp/5np1/3p4/3P1B2/2N1PN2/PPP1BPPP/R2QK2R b KQ –

ECO: A48
Opening Name: Queen’s Pawn Game: Barry Attack, Tarzan Attack
SAN: 1. d4 Nf6 2. Nf3 g6 3. Nc3 d5 4. Bf4 Bg7 5. Qd2
UCI: d2d4 g8f6 g1f3 g7g6 b1c3 d7d5 c1f4 f8g7 d1d2
FEN: rnbqk2r/ppp1ppbp/5np1/3p4/3P1B2/2N2N2/PPPQPPPP/R3KB1R b KQkq –

ECO: A48
Opening Name: Queen’s Pawn Game: Torre Attack, Grünfeld Variation, Main Line
SAN: 1. d4 Nf6 2. Nf3 g6 3. Bg5 Bg7 4. Nbd2 d5 5. e3 O-O
UCI: d2d4 g8f6 g1f3 g7g6 c1g5 f8g7 b1d2 d7d5 e2e3 e8g8
FEN: rnbq1rk1/ppp1ppbp/5np1/3p2B1/3P4/4PN2/PPPN1PPP/R2QKB1R w KQ –

ECO: A48
Opening Name: Torre Attack: Fianchetto Defense
SAN: 1. d4 Nf6 2. Nf3 g6 3. Bg5
UCI: d2d4 g8f6 g1f3 g7g6 c1g5
FEN: rnbqkb1r/pppppp1p/5np1/6B1/3P4/5N2/PPP1PPPP/RN1QKB1R b KQkq –

ECO: A48
Opening Name: Torre Attack: Fianchetto Defense, Euwe Variation
SAN: 1. d4 Nf6 2. Nf3 g6 3. Bg5 Bg7 4. Nbd2 c5
UCI: d2d4 g8f6 g1f3 g7g6 c1g5 f8g7 b1d2 c7c5
FEN: rnbqk2r/pp1pppbp/5np1/2p3B1/3P4/5N2/PPPNPPPP/R2QKB1R w KQkq –

ECO: A49
Opening Name: Indian Defense: Przepiorka Variation
SAN: 1. d4 Nf6 2. Nf3 g6 3. g3
UCI: d2d4 g8f6 g1f3 g7g6 g2g3
FEN: rnbqkb1r/pppppp1p/5np1/8/3P4/5NP1/PPP1PP1P/RNBQKB1R b KQkq –

ECO: A50
Opening Name: Indian Defense: Medusa Gambit
SAN: 1. d4 Nf6 2. c4 g5
UCI: d2d4 g8f6 c2c4 g7g5
FEN: rnbqkb1r/pppppp1p/5n2/6p1/2PP4/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: A50
Opening Name: Indian Defense: Normal Variation
SAN: 1. d4 Nf6 2. c4
UCI: d2d4 g8f6 c2c4
FEN: rnbqkb1r/pppppppp/5n2/8/2PP4/8/PP2PPPP/RNBQKBNR b KQkq –

ECO: A50
Opening Name: Indian Defense: Pyrenees Gambit
SAN: 1. d4 Nf6 2. c4 b5
UCI: d2d4 g8f6 c2c4 b7b5
FEN: rnbqkb1r/p1pppppp/5n2/1p6/2PP4/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: A50
Opening Name: Mexican Defense
SAN: 1. d4 Nf6 2. c4 Nc6
UCI: d2d4 g8f6 c2c4 b8c6
FEN: r1bqkb1r/pppppppp/2n2n2/8/2PP4/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: A50
Opening Name: Mexican Defense: Horsefly Gambit
SAN: 1. d4 Nf6 2. c4 Nc6 3. d5 Ne5 4. f4
UCI: d2d4 g8f6 c2c4 b8c6 d4d5 c6e5 f2f4
FEN: r1bqkb1r/pppppppp/5n2/3Pn3/2P2P2/8/PP2P1PP/RNBQKBNR b KQkq –

ECO: A50
Opening Name: Queen’s Indian Accelerated
SAN: 1. d4 Nf6 2. c4 b6
UCI: d2d4 g8f6 c2c4 b7b6
FEN: rnbqkb1r/p1pppppp/1p3n2/8/2PP4/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: A50
Opening Name: Slav Indian
SAN: 1. d4 Nf6 2. c4 c6
UCI: d2d4 g8f6 c2c4 c7c6
FEN: rnbqkb1r/pp1ppppp/2p2n2/8/2PP4/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: A51
Opening Name: Indian Defense: Budapest Defense
SAN: 1. d4 Nf6 2. c4 e5
UCI: d2d4 g8f6 c2c4 e7e5
FEN: rnbqkb1r/pppp1ppp/5n2/4p3/2PP4/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: A51
Opening Name: Indian Defense: Budapest Defense, Fajarowicz Defense, Bonsdorf Variation
SAN: 1. d4 Nf6 2. c4 e5 3. dxe5 Ne4 4. a3 b6
UCI: d2d4 g8f6 c2c4 e7e5 d4e5 f6e4 a2a3 b7b6
FEN: rnbqkb1r/p1pp1ppp/1p6/4P3/2P1n3/P7/1P2PPPP/RNBQKBNR w KQkq –

ECO: A51
Opening Name: Indian Defense: Budapest Defense, Fajarowicz Variation
SAN: 1. d4 Nf6 2. c4 e5 3. dxe5 Ne4
UCI: d2d4 g8f6 c2c4 e7e5 d4e5 f6e4
FEN: rnbqkb1r/pppp1ppp/8/4P3/2P1n3/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: A51
Opening Name: Indian Defense: Budapest Defense, Fajarowicz-Steiner Variation
SAN: 1. d4 Nf6 2. c4 e5 3. dxe5 Ne4 4. Qc2
UCI: d2d4 g8f6 c2c4 e7e5 d4e5 f6e4 d1c2
FEN: rnbqkb1r/pppp1ppp/8/4P3/2P1n3/8/PPQ1PPPP/RNB1KBNR b KQkq –

ECO: A52
Opening Name: Indian Defense: Budapest Defense
SAN: 1. d4 Nf6 2. c4 e5 3. dxe5 Ng4
UCI: d2d4 g8f6 c2c4 e7e5 d4e5 f6g4
FEN: rnbqkb1r/pppp1ppp/8/4P3/2P3n1/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: A52
Opening Name: Indian Defense: Budapest Defense, Adler Variation
SAN: 1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. Nf3
UCI: d2d4 g8f6 c2c4 e7e5 d4e5 f6g4 g1f3
FEN: rnbqkb1r/pppp1ppp/8/4P3/2P3n1/5N2/PP2PPPP/RNBQKB1R b KQkq –

ECO: A52
Opening Name: Indian Defense: Budapest Defense, Alekhine Variation
SAN: 1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. e4
UCI: d2d4 g8f6 c2c4 e7e5 d4e5 f6g4 e2e4
FEN: rnbqkb1r/pppp1ppp/8/4P3/2P1P1n1/8/PP3PPP/RNBQKBNR b KQkq –

ECO: A52
Opening Name: Indian Defense: Budapest Defense, Alekhine Variation, Abonyi Variation
SAN: 1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. e4 Nxe5 5. f4 Nec6
UCI: d2d4 g8f6 c2c4 e7e5 d4e5 f6g4 e2e4 g4e5 f2f4 e5c6
FEN: rnbqkb1r/pppp1ppp/2n5/8/2P1PP2/8/PP4PP/RNBQKBNR w KQkq –

ECO: A52
Opening Name: Indian Defense: Budapest Defense, Alekhine Variation, Tartakower Defense
SAN: 1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. e4 d6
UCI: d2d4 g8f6 c2c4 e7e5 d4e5 f6g4 e2e4 d7d6
FEN: rnbqkb1r/ppp2ppp/3p4/4P3/2P1P1n1/8/PP3PPP/RNBQKBNR w KQkq –

ECO: A52
Opening Name: Indian Defense: Budapest Defense, Rubinstein Variation
SAN: 1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. Bf4
UCI: d2d4 g8f6 c2c4 e7e5 d4e5 f6g4 c1f4
FEN: rnbqkb1r/pppp1ppp/8/4P3/2P2Bn1/8/PP2PPPP/RN1QKBNR b KQkq –

ECO: A53
Opening Name: Old Indian Defense
SAN: 1. d4 Nf6 2. c4 d6
UCI: d2d4 g8f6 c2c4 d7d6
FEN: rnbqkb1r/ppp1pppp/3p1n2/8/2PP4/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: A53
Opening Name: Old Indian Defense: Aged Gibbon Gambit
SAN: 1. d4 Nf6 2. c4 d6 3. g4
UCI: d2d4 g8f6 c2c4 d7d6 g2g4
FEN: rnbqkb1r/ppp1pppp/3p1n2/8/2PP2P1/8/PP2PP1P/RNBQKBNR b KQkq –

ECO: A53
Opening Name: Old Indian Defense: Czech Variation, with Nc3
SAN: 1. d4 Nf6 2. c4 d6 3. Nc3 c6
UCI: d2d4 g8f6 c2c4 d7d6 b1c3 c7c6
FEN: rnbqkb1r/pp2pppp/2pp1n2/8/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq –

ECO: A53
Opening Name: Old Indian Defense: Czech Variation, with Nf3
SAN: 1. d4 Nf6 2. c4 d6 3. Nf3 c6
UCI: d2d4 g8f6 c2c4 d7d6 g1f3 c7c6
FEN: rnbqkb1r/pp2pppp/2pp1n2/8/2PP4/5N2/PP2PPPP/RNBQKB1R w KQkq –

ECO: A53
Opening Name: Old Indian Defense: Janowski Variation
SAN: 1. d4 Nf6 2. c4 d6 3. Nc3 Bf5
UCI: d2d4 g8f6 c2c4 d7d6 b1c3 c8f5
FEN: rn1qkb1r/ppp1pppp/3p1n2/5b2/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq –

ECO: A53
Opening Name: Old Indian Defense: Janowski Variation, Fianchetto Variation
SAN: 1. d4 Nf6 2. c4 d6 3. Nc3 Bf5 4. g3
UCI: d2d4 g8f6 c2c4 d7d6 b1c3 c8f5 g2g3
FEN: rn1qkb1r/ppp1pppp/3p1n2/5b2/2PP4/2N3P1/PP2PP1P/R1BQKBNR b KQkq –

ECO: A53
Opening Name: Old Indian Defense: Janowski Variation, Grinberg Gambit
SAN: 1. d4 Nf6 2. c4 d6 3. Nc3 Bf5 4. e4
UCI: d2d4 g8f6 c2c4 d7d6 b1c3 c8f5 e2e4
FEN: rn1qkb1r/ppp1pppp/3p1n2/5b2/2PPP3/2N5/PP3PPP/R1BQKBNR b KQkq –

ECO: A53
Opening Name: Old Indian Defense: Janowski Variation, Main Line
SAN: 1. d4 Nf6 2. c4 d6 3. Nc3 Bf5 4. f3
UCI: d2d4 g8f6 c2c4 d7d6 b1c3 c8f5 f2f3
FEN: rn1qkb1r/ppp1pppp/3p1n2/5b2/2PP4/2N2P2/PP2P1PP/R1BQKBNR b KQkq –

ECO: A54
Opening Name: Old Indian Defense: Duz-Khotimirsky Variation
SAN: 1. d4 Nf6 2. c4 d6 3. Nc3 e5 4. e3 Nbd7 5. Bd3
UCI: d2d4 g8f6 c2c4 d7d6 b1c3 e7e5 e2e3 b8d7 f1d3
FEN: r1bqkb1r/pppn1ppp/3p1n2/4p3/2PP4/2NBP3/PP3PPP/R1BQK1NR b KQkq –

ECO: A54
Opening Name: Old Indian Defense: Tartakower-Indian
SAN: 1. d4 Nf6 2. c4 d6 3. Nf3 Bg4
UCI: d2d4 g8f6 c2c4 d7d6 g1f3 c8g4
FEN: rn1qkb1r/ppp1pppp/3p1n2/8/2PP2b1/5N2/PP2PPPP/RNBQKB1R w KQkq –

ECO: A54
Opening Name: Old Indian Defense: Two Knights Variation
SAN: 1. d4 Nf6 2. c4 d6 3. Nc3 e5 4. Nf3
UCI: d2d4 g8f6 c2c4 d7d6 b1c3 e7e5 g1f3
FEN: rnbqkb1r/ppp2ppp/3p1n2/4p3/2PP4/2N2N2/PP2PPPP/R1BQKB1R b KQkq –

ECO: A54
Opening Name: Old Indian Defense: Ukrainian Variation
SAN: 1. d4 Nf6 2. c4 d6 3. Nc3 e5
UCI: d2d4 g8f6 c2c4 d7d6 b1c3 e7e5
FEN: rnbqkb1r/ppp2ppp/3p1n2/4p3/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq –

ECO: A55
Opening Name: Old Indian Defense: Normal Variation
SAN: 1. d4 Nf6 2. c4 d6 3. Nc3 Nbd7 4. e4 e5 5. Nf3
UCI: d2d4 g8f6 c2c4 d7d6 b1c3 b8d7 e2e4 e7e5 g1f3
FEN: r1bqkb1r/pppn1ppp/3p1n2/4p3/2PPP3/2N2N2/PP3PPP/R1BQKB1R b KQkq –

ECO: A56
Opening Name: Benoni Defense
SAN: 1. d4 Nf6 2. c4 c5
UCI: d2d4 g8f6 c2c4 c7c5
FEN: rnbqkb1r/pp1ppppp/5n2/2p5/2PP4/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: A56
Opening Name: Benoni Defense: Czech Benoni Defense
SAN: 1. d4 Nf6 2. c4 c5 3. d5 e5
UCI: d2d4 g8f6 c2c4 c7c5 d4d5 e7e5
FEN: rnbqkb1r/pp1p1ppp/5n2/2pPp3/2P5/8/PP2PPPP/RNBQKBNR w KQkq e6

ECO: A56
Opening Name: Benoni Defense: Hromádka System
SAN: 1. d4 Nf6 2. c4 c5 3. d5 d6
UCI: d2d4 g8f6 c2c4 c7c5 d4d5 d7d6
FEN: rnbqkb1r/pp2pppp/3p1n2/2pP4/2P5/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: A56
Opening Name: Benoni Defense: King’s Indian System
SAN: 1. d4 Nf6 2. c4 c5 3. d5 e5 4. Nc3 d6 5. e4 g6
UCI: d2d4 g8f6 c2c4 c7c5 d4d5 e7e5 b1c3 d7d6 e2e4 g7g6
FEN: rnbqkb1r/pp3p1p/3p1np1/2pPp3/2P1P3/2N5/PP3PPP/R1BQKBNR w KQkq –

ECO: A56
Opening Name: Benoni Defense: Weenink Variation
SAN: 1. d4 Nf6 2. c4 c5 3. dxc5 e6
UCI: d2d4 g8f6 c2c4 c7c5 d4c5 e7e6
FEN: rnbqkb1r/pp1p1ppp/4pn2/2P5/2P5/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: A56
Opening Name: Grünfeld Defense: Three Knights Variation, Burille Variation, Reversed Tarrasch
SAN: 1. d4 Nf6 2. c4 c5 3. e3 g6 4. Nc3 Bg7 5. Nf3 O-O 6. Be2 cxd4 7. exd4 d5 8. O-O Nc6
UCI: d2d4 g8f6 c2c4 c7c5 e2e3 g7g6 b1c3 f8g7 g1f3 e8g8 f1e2 c5d4 e3d4 d7d5 e1g1 b8c6
FEN: r1bq1rk1/pp2ppbp/2n2np1/3p4/2PP4/2N2N2/PP2BPPP/R1BQ1RK1 w – –

ECO: A56
Opening Name: Vulture Defense
SAN: 1. d4 Nf6 2. c4 c5 3. d5 Ne4
UCI: d2d4 g8f6 c2c4 c7c5 d4d5 f6e4
FEN: rnbqkb1r/pp1ppppp/8/2pP4/2P1n3/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: A57
Opening Name: Benko Gambit
SAN: 1. d4 Nf6 2. c4 c5 3. d5 b5
UCI: d2d4 g8f6 c2c4 c7c5 d4d5 b7b5
FEN: rnbqkb1r/p2ppppp/5n2/1ppP4/2P5/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: A57
Opening Name: Benko Gambit Accepted
SAN: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6
UCI: d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6
FEN: rnbqkb1r/3ppppp/p4n2/1PpP4/8/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: A57
Opening Name: Benko Gambit Accepted: Dlugy Variation
SAN: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. f3
UCI: d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6 f2f3
FEN: rnbqkb1r/3ppppp/p4n2/1PpP4/8/5P2/PP2P1PP/RNBQKBNR b KQkq –

ECO: A57
Opening Name: Benko Gambit Accepted: Modern Variation
SAN: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. e3
UCI: d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6 e2e3
FEN: rnbqkb1r/3ppppp/p4n2/1PpP4/8/4P3/PP3PPP/RNBQKBNR b KQkq –

ECO: A57
Opening Name: Benko Gambit Accepted: Pawn Return Variation
SAN: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. b6
UCI: d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6 b5b6
FEN: rnbqkb1r/3ppppp/pP3n2/2pP4/8/8/PP2PPPP/RNBQKBNR b KQkq –

ECO: A57
Opening Name: Benko Gambit Declined: Bishop Attack
SAN: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. Bg5
UCI: d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c1g5
FEN: rnbqkb1r/p2ppppp/5n2/1ppP2B1/2P5/8/PP2PPPP/RN1QKBNR b KQkq –

ECO: A57
Opening Name: Benko Gambit Declined: Hjørring Countergambit
SAN: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. e4
UCI: d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 e2e4
FEN: rnbqkb1r/p2ppppp/5n2/1ppP4/2P1P3/8/PP3PPP/RNBQKBNR b KQkq –

ECO: A57
Opening Name: Benko Gambit Declined: Main Line
SAN: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. Nf3
UCI: d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 g1f3
FEN: rnbqkb1r/p2ppppp/5n2/1ppP4/2P5/5N2/PP2PPPP/RNBQKB1R b KQkq –

ECO: A57
Opening Name: Benko Gambit Declined: Pseudo-Sämisch
SAN: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. f3
UCI: d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 f2f3
FEN: rnbqkb1r/p2ppppp/5n2/1ppP4/2P5/5P2/PP2P1PP/RNBQKBNR b KQkq –

ECO: A57
Opening Name: Benko Gambit Declined: Quiet Line
SAN: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. Nd2
UCI: d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 b1d2
FEN: rnbqkb1r/p2ppppp/5n2/1ppP4/2P5/8/PP1NPPPP/R1BQKBNR b KQkq –

ECO: A57
Opening Name: Benko Gambit Declined: Sosonko Variation
SAN: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. a4
UCI: d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 a2a4
FEN: rnbqkb1r/p2ppppp/5n2/1ppP4/P1P5/8/1P2PPPP/RNBQKBNR b KQkq –

ECO: A57
Opening Name: Benko Gambit: Mutkin Countergambit
SAN: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. g4
UCI: d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 g2g4
FEN: rnbqkb1r/p2ppppp/5n2/1ppP4/2P3P1/8/PP2PP1P/RNBQKBNR b KQkq –

ECO: A57
Opening Name: Benko Gambit: Nescafe Frappe Attack
SAN: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. Nc3 axb5 6. e4 b4 7. Nb5 d6 8. Bc4
UCI: d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6 b1c3 a6b5 e2e4 b5b4 c3b5 d7d6 f1c4
FEN: rnbqkb1r/4pppp/3p1n2/1NpP4/1pB1P3/8/PP3PPP/R1BQK1NR b KQkq –

ECO: A57
Opening Name: Benko Gambit: Zaitsev System
SAN: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. Nc3
UCI: d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6 b1c3
FEN: rnbqkb1r/3ppppp/p4n2/1PpP4/8/2N5/PP2PPPP/R1BQKBNR b KQkq –

ECO: A57
Opening Name: Benko Gambit: Zaitsev Variation, Nescafe Frappe Attack
SAN: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. Nc3 axb5 6. e4 b4 7. Nb5
UCI: d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6 b1c3 a6b5 e2e4 b5b4 c3b5
FEN: rnbqkb1r/3ppppp/5n2/1NpP4/1p2P3/8/PP3PPP/R1BQKBNR b KQkq –

ECO: A58
Opening Name: Benko Gambit Accepted: Central Storming Variation
SAN: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 g6 6. Nc3 Bxa6 7. f4
UCI: d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6 b5a6 g7g6 b1c3 c8a6 f2f4
FEN: rn1qkb1r/3ppp1p/b4np1/2pP4/5P2/2N5/PP2P1PP/R1BQKBNR b KQkq –

ECO: A58
Opening Name: Benko Gambit Accepted: Fianchetto Variation
SAN: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 g6 6. Nc3 Bxa6 7. g3 d6 8. Bg2 Bg7 9. Nf3
UCI: d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6 b5a6 g7g6 b1c3 c8a6 g2g3 d7d6 f1g2 f8g7 g1f3
FEN: rn1qk2r/4ppbp/b2p1np1/2pP4/8/2N2NP1/PP2PPBP/R1BQK2R b KQkq –

ECO: A58
Opening Name: Benko Gambit Accepted: Fully Accepted Variation
SAN: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6
UCI: d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6 b5a6
FEN: rnbqkb1r/3ppppp/P4n2/2pP4/8/8/PP2PPPP/RNBQKBNR b KQkq –

ECO: A58
Opening Name: Benko Gambit: Fianchetto Variation
SAN: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 Bxa6 6. Nc3 d6 7. Nf3 g6 8. g3
UCI: d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6 b5a6 c8a6 b1c3 d7d6 g1f3 g7g6 g2g3
FEN: rn1qkb1r/4pp1p/b2p1np1/2pP4/8/2N2NP1/PP2PP1P/R1BQKB1R b KQkq –

ECO: A58
Opening Name: Benko Gambit: Nd2 Variation
SAN: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 Bxa6 6. Nc3 d6 7. Nf3 g6 8. Nd2
UCI: d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6 b5a6 c8a6 b1c3 d7d6 g1f3 g7g6 f3d2
FEN: rn1qkb1r/4pp1p/b2p1np1/2pP4/8/2N5/PP1NPPPP/R1BQKB1R b KQkq –

ECO: A59
Opening Name: Benko Gambit
SAN: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 g6 6. Nc3 Bxa6 7. e4 Bxf1 8. Kxf1 d6 9. g3
UCI: d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6 b5a6 g7g6 b1c3 c8a6 e2e4 a6f1 e1f1 d7d6 g2g3
FEN: rn1qkb1r/4pp1p/3p1np1/2pP4/4P3/2N3P1/PP3P1P/R1BQ1KNR b kq –

ECO: A59
Opening Name: Benko Gambit Accepted: King Walk Variation
SAN: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 g6 6. Nc3 Bxa6 7. Nf3 d6 8. e4 Bxf1 9. Kxf1 Bg7 10. g3 O-O 11. Kg2
UCI: d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6 b5a6 g7g6 b1c3 c8a6 g1f3 d7d6 e2e4 a6f1 e1f1 f8g7 g2g3 e8g8 f1g2
FEN: rn1q1rk1/4ppbp/3p1np1/2pP4/4P3/2N2NP1/PP3PKP/R1BQ3R b – –

ECO: A59
Opening Name: Benko Gambit Accepted: Yugoslav
SAN: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 Bxa6 6. Nc3 d6 7. e4
UCI: d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6 b5a6 c8a6 b1c3 d7d6 e2e4
FEN: rn1qkb1r/4pppp/b2p1n2/2pP4/4P3/2N5/PP3PPP/R1BQKBNR b KQkq –

ECO: A59
Opening Name: Benko Gambit Accepted: Yugoslav
SAN: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 g6 6. Nc3 Bxa6 7. e4 Bxf1 8. Kxf1 d6 9. Nge2
UCI: d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6 b5a6 g7g6 b1c3 c8a6 e2e4 a6f1 e1f1 d7d6 g1e2
FEN: rn1qkb1r/4pp1p/3p1np1/2pP4/4P3/2N5/PP2NPPP/R1BQ1K1R b kq –

ECO: A60
Opening Name: Benoni Defense: Modern Variation
SAN: 1. d4 Nf6 2. c4 c5 3. d5 e6
UCI: d2d4 g8f6 c2c4 c7c5 d4d5 e7e6
FEN: rnbqkb1r/pp1p1ppp/4pn2/2pP4/2P5/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: A60
Opening Name: Benoni Defense: Modern Variation, Snake Variation
SAN: 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 Bd6
UCI: d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 f8d6
FEN: rnbqk2r/pp1p1ppp/3b1n2/2pP4/8/2N5/PP2PPPP/R1BQKBNR w KQkq –

ECO: A61
Opening Name: Benoni Defense
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 c7c5 d4d5 e6d5 c4d5 d7d6 b1c3 g7g6
FEN: rnbqkb1r/pp3p1p/3p1np1/2pP4/8/2N2N2/PP2PPPP/R1BQKB1R w KQkq –

ECO: A61
Opening Name: Benoni Defense: Fianchetto Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. g3
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 c7c5 d4d5 e6d5 c4d5 d7d6 b1c3 g7g6 g2g3
FEN: rnbqkb1r/pp3p1p/3p1np1/2pP4/8/2N2NP1/PP2PP1P/R1BQKB1R b KQkq –

ECO: A61
Opening Name: Benoni Defense: Knight’s Tour Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. Nd2
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 c7c5 d4d5 e6d5 c4d5 d7d6 b1c3 g7g6 f3d2
FEN: rnbqkb1r/pp3p1p/3p1np1/2pP4/8/2N5/PP1NPPPP/R1BQKB1R b KQkq –

ECO: A61
Opening Name: Benoni Defense: Uhlmann Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. Bg5
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 c7c5 d4d5 e6d5 c4d5 d7d6 b1c3 g7g6 c1g5
FEN: rnbqkb1r/pp3p1p/3p1np1/2pP2B1/8/2N2N2/PP2PPPP/R2QKB1R b KQkq –

ECO: A62
Opening Name: Benoni Defense: Fianchetto Variation
SAN: 1. d4 Nf6 2. c4 e6 3. g3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. Bg2 Bg7 8. Nf3 O-O
UCI: d2d4 g8f6 c2c4 e7e6 g2g3 c7c5 d4d5 e6d5 c4d5 d7d6 b1c3 g7g6 f1g2 f8g7 g1f3 e8g8
FEN: rnbq1rk1/pp3pbp/3p1np1/2pP4/8/2N2NP1/PP2PPBP/R1BQK2R w KQ –

ECO: A63
Opening Name: Benoni Defense: Fianchetto Variation, Hastings Defense
SAN: 1. d4 Nf6 2. c4 e6 3. g3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. Bg2 Bg7 8. Nf3 O-O 9. O-O Nbd7
UCI: d2d4 g8f6 c2c4 e7e6 g2g3 c7c5 d4d5 e6d5 c4d5 d7d6 b1c3 g7g6 f1g2 f8g7 g1f3 e8g8 e1g1 b8d7
FEN: r1bq1rk1/pp1n1pbp/3p1np1/2pP4/8/2N2NP1/PP2PPBP/R1BQ1RK1 w – –

ECO: A64
Opening Name: Benoni Defense: Fianchetto Variation, Hastings Defense, Main Line
SAN: 1. d4 Nf6 2. c4 e6 3. g3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. Bg2 Bg7 8. Nf3 O-O 9. O-O a6 10. a4 Nbd7 11. Nd2 Re8
UCI: d2d4 g8f6 c2c4 e7e6 g2g3 c7c5 d4d5 e6d5 c4d5 d7d6 b1c3 g7g6 f1g2 f8g7 g1f3 e8g8 e1g1 a7a6 a2a4 b8d7 f3d2 f8e8
FEN: r1bqr1k1/1p1n1pbp/p2p1np1/2pP4/P7/2N3P1/1P1NPPBP/R1BQ1RK1 w – –

ECO: A65
Opening Name: Benoni Defense: King’s Pawn Line
SAN: 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4
UCI: d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4
FEN: rnbqkb1r/pp3ppp/3p1n2/2pP4/4P3/2N5/PP3PPP/R1BQKBNR b KQkq –

ECO: A66
Opening Name: Benoni Defense: Mikenas Variation
SAN: 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f4 Bg7 8. e5
UCI: d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 f2f4 f8g7 e4e5
FEN: rnbqk2r/pp3pbp/3p1np1/2pPP3/5P2/2N5/PP4PP/R1BQKBNR b KQkq –

ECO: A66
Opening Name: Benoni Defense: Pawn Storm Variation
SAN: 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f4
UCI: d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 f2f4
FEN: rnbqkb1r/pp3p1p/3p1np1/2pP4/4PP2/2N5/PP4PP/R1BQKBNR b KQkq –

ECO: A67
Opening Name: Benoni Defense: Taimanov Variation
SAN: 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f4 Bg7 8. Bb5+
UCI: d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 f2f4 f8g7 f1b5
FEN: rnbqk2r/pp3pbp/3p1np1/1BpP4/4PP2/2N5/PP4PP/R1BQK1NR b KQkq –

ECO: A68
Opening Name: Benoni Defense: Four Pawns Attack
SAN: 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f4 Bg7 8. Nf3 O-O
UCI: d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 f2f4 f8g7 g1f3 e8g8
FEN: rnbq1rk1/pp3pbp/3p1np1/2pP4/4PP2/2N2N2/PP4PP/R1BQKB1R w KQ –

ECO: A69
Opening Name: Benoni Defense: Four Pawns Attack, Main Line
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 O-O 6. Nf3 c5 7. d5 e6 8. Be2 exd5 9. cxd5 Re8
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f4 e8g8 g1f3 c7c5 d4d5 e7e6 f1e2 e6d5 c4d5 f8e8
FEN: rnbqr1k1/pp3pbp/3p1np1/2pP4/4PP2/2N2N2/PP2B1PP/R1BQK2R w KQ –

ECO: A70
Opening Name: Benoni Defense: Classical Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. e4
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 c7c5 d4d5 e6d5 c4d5 d7d6 b1c3 g7g6 e2e4
FEN: rnbqkb1r/pp3p1p/3p1np1/2pP4/4P3/2N2N2/PP3PPP/R1BQKB1R b KQkq –

ECO: A70
Opening Name: Benoni Defense: Classical Variation, New York Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. e4 Bg7 8. h3
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 c7c5 d4d5 e6d5 c4d5 d7d6 b1c3 g7g6 e2e4 f8g7 h2h3
FEN: rnbqk2r/pp3pbp/3p1np1/2pP4/4P3/2N2N1P/PP3PP1/R1BQKB1R b KQkq –

ECO: A70
Opening Name: Benoni Defense: Classical Variation, Traditional Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. e4 Bg7 8. Be2
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 c7c5 d4d5 e6d5 c4d5 d7d6 b1c3 g7g6 e2e4 f8g7 f1e2
FEN: rnbqk2r/pp3pbp/3p1np1/2pP4/4P3/2N2N2/PP2BPPP/R1BQK2R b KQkq –

ECO: A71
Opening Name: Benoni Defense: Classical Variation, Averbakh-Grivas Attack
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. e4 Bg7 8. Bg5
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 c7c5 d4d5 e6d5 c4d5 d7d6 b1c3 g7g6 e2e4 f8g7 c1g5
FEN: rnbqk2r/pp3pbp/3p1np1/2pP2B1/4P3/2N2N2/PP3PPP/R2QKB1R b KQkq –

ECO: A72
Opening Name: Benoni Defense: Classical Variation
SAN: 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 O-O
UCI: d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 g1f3 f8g7 f1e2 e8g8
FEN: rnbq1rk1/pp3pbp/3p1np1/2pP4/4P3/2N2N2/PP2BPPP/R1BQK2R w KQ –

ECO: A73
Opening Name: Benoni Defense: Classical Variation, Main Line
SAN: 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 O-O 9. O-O
UCI: d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 g1f3 f8g7 f1e2 e8g8 e1g1
FEN: rnbq1rk1/pp3pbp/3p1np1/2pP4/4P3/2N2N2/PP2BPPP/R1BQ1RK1 b – –

ECO: A74
Opening Name: Benoni Defense: Classical Variation, Full Line
SAN: 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 O-O 9. O-O a6 10. a4
UCI: d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 g1f3 f8g7 f1e2 e8g8 e1g1 a7a6 a2a4
FEN: rnbq1rk1/1p3pbp/p2p1np1/2pP4/P3P3/2N2N2/1P2BPPP/R1BQ1RK1 b – –

ECO: A75
Opening Name: Benoni Defense: Classical Variation, Argentine Counterattack
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. e4 Bg7 8. Be2 O-O 9. O-O a6 10. a4 Bg4
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 c7c5 d4d5 e6d5 c4d5 d7d6 b1c3 g7g6 e2e4 f8g7 f1e2 e8g8 e1g1 a7a6 a2a4 c8g4
FEN: rn1q1rk1/1p3pbp/p2p1np1/2pP4/P3P1b1/2N2N2/1P2BPPP/R1BQ1RK1 w – –

ECO: A76
Opening Name: Benoni Defense: Classical Variation, Czerniak Defense
SAN: 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 O-O 9. O-O Re8
UCI: d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 g1f3 f8g7 f1e2 e8g8 e1g1 f8e8
FEN: rnbqr1k1/pp3pbp/3p1np1/2pP4/4P3/2N2N2/PP2BPPP/R1BQ1RK1 w – –

ECO: A77
Opening Name: Benoni Defense: Classical Variation, Czerniak Defense, Tal Line
SAN: 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 O-O 9. O-O Re8 10. Nd2
UCI: d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 g1f3 f8g7 f1e2 e8g8 e1g1 f8e8 f3d2
FEN: rnbqr1k1/pp3pbp/3p1np1/2pP4/4P3/2N5/PP1NBPPP/R1BQ1RK1 b – –

ECO: A78
Opening Name: Benoni Defense: Classical Variation, Czerniak Defense
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. e4 Bg7 8. Be2 O-O 9. O-O Re8 10. Nd2 Na6
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 c7c5 d4d5 e6d5 c4d5 d7d6 b1c3 g7g6 e2e4 f8g7 f1e2 e8g8 e1g1 f8e8 f3d2 b8a6
FEN: r1bqr1k1/pp3pbp/n2p1np1/2pP4/4P3/2N5/PP1NBPPP/R1BQ1RK1 w – –

ECO: A79
Opening Name: Benoni Defense: Classical Variation, Czerniak Defense
SAN: 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 O-O 9. O-O Re8 10. Nd2 Na6 11. f3
UCI: d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 g1f3 f8g7 f1e2 e8g8 e1g1 f8e8 f3d2 b8a6 f2f3
FEN: r1bqr1k1/pp3pbp/n2p1np1/2pP4/4P3/2N2P2/PP1NB1PP/R1BQ1RK1 b – –

ECO: A80
Opening Name: Dutch Defense
SAN: 1. d4 f5
UCI: d2d4 f7f5
FEN: rnbqkbnr/ppppp1pp/8/5p2/3P4/8/PPP1PPPP/RNBQKBNR w KQkq –

ECO: A80
Opening Name: Dutch Defense: Alapin Variation
SAN: 1. d4 f5 2. Qd3
UCI: d2d4 f7f5 d1d3
FEN: rnbqkbnr/ppppp1pp/8/5p2/3P4/3Q4/PPP1PPPP/RNB1KBNR b KQkq –

ECO: A80
Opening Name: Dutch Defense: Hevendehl Gambit
SAN: 1. d4 f5 2. g4 e5
UCI: d2d4 f7f5 g2g4 e7e5
FEN: rnbqkbnr/pppp2pp/8/4pp2/3P2P1/8/PPP1PP1P/RNBQKBNR w KQkq –

ECO: A80
Opening Name: Dutch Defense: Hopton Attack
SAN: 1. d4 f5 2. Bg5
UCI: d2d4 f7f5 c1g5
FEN: rnbqkbnr/ppppp1pp/8/5pB1/3P4/8/PPP1PPPP/RN1QKBNR b KQkq –

ECO: A80
Opening Name: Dutch Defense: Janzen-Korchnoi Gambit
SAN: 1. d4 f5 2. h3 Nf6 3. g4
UCI: d2d4 f7f5 h2h3 g8f6 g2g4
FEN: rnbqkb1r/ppppp1pp/5n2/5p2/3P2P1/7P/PPP1PP2/RNBQKBNR b KQkq –

ECO: A80
Opening Name: Dutch Defense: Kingfisher Gambit
SAN: 1. d4 f5 2. Nc3 d5 3. e4
UCI: d2d4 f7f5 b1c3 d7d5 e2e4
FEN: rnbqkbnr/ppp1p1pp/8/3p1p2/3PP3/2N5/PPP2PPP/R1BQKBNR b KQkq –

ECO: A80
Opening Name: Dutch Defense: Korchnoi Attack
SAN: 1. d4 f5 2. h3
UCI: d2d4 f7f5 h2h3
FEN: rnbqkbnr/ppppp1pp/8/5p2/3P4/7P/PPP1PPP1/RNBQKBNR b KQkq –

ECO: A80
Opening Name: Dutch Defense: Krejcik Gambit
SAN: 1. d4 f5 2. g4
UCI: d2d4 f7f5 g2g4
FEN: rnbqkbnr/ppppp1pp/8/5p2/3P2P1/8/PPP1PP1P/RNBQKBNR b KQkq –

ECO: A80
Opening Name: Dutch Defense: Krejcik Gambit, Tate Gambit
SAN: 1. d4 f5 2. g4 fxg4 3. e4 d5 4. Nc3
UCI: d2d4 f7f5 g2g4 f5g4 e2e4 d7d5 b1c3
FEN: rnbqkbnr/ppp1p1pp/8/3p4/3PP1p1/2N5/PPP2P1P/R1BQKBNR b KQkq –

ECO: A80
Opening Name: Dutch Defense: Manhattan Gambit, Anti-Classical Line
SAN: 1. d4 f5 2. Qd3 e6 3. g4
UCI: d2d4 f7f5 d1d3 e7e6 g2g4
FEN: rnbqkbnr/pppp2pp/4p3/5p2/3P2P1/3Q4/PPP1PP1P/RNB1KBNR b KQkq –

ECO: A80
Opening Name: Dutch Defense: Manhattan Gambit, Anti-Leningrad
SAN: 1. d4 f5 2. Qd3 g6 3. g4
UCI: d2d4 f7f5 d1d3 g7g6 g2g4
FEN: rnbqkbnr/ppppp2p/6p1/5p2/3P2P1/3Q4/PPP1PP1P/RNB1KBNR b KQkq –

ECO: A80
Opening Name: Dutch Defense: Manhattan Gambit, Anti-Modern
SAN: 1. d4 f5 2. Qd3 d6 3. g4
UCI: d2d4 f7f5 d1d3 d7d6 g2g4
FEN: rnbqkbnr/ppp1p1pp/3p4/5p2/3P2P1/3Q4/PPP1PP1P/RNB1KBNR b KQkq –

ECO: A80
Opening Name: Dutch Defense: Manhattan Gambit, Anti-Stonewall
SAN: 1. d4 f5 2. Qd3 d5 3. g4
UCI: d2d4 f7f5 d1d3 d7d5 g2g4
FEN: rnbqkbnr/ppp1p1pp/8/3p1p2/3P2P1/3Q4/PPP1PP1P/RNB1KBNR b KQkq –

ECO: A80
Opening Name: Dutch Defense: Omega-Isis Gambit
SAN: 1. d4 f5 2. Nf3 e5
UCI: d2d4 f7f5 g1f3 e7e5
FEN: rnbqkbnr/pppp2pp/8/4pp2/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq –

ECO: A80
Opening Name: Dutch Defense: Raphael Variation
SAN: 1. d4 f5 2. Nc3
UCI: d2d4 f7f5 b1c3
FEN: rnbqkbnr/ppppp1pp/8/5p2/3P4/2N5/PPP1PPPP/R1BQKBNR b KQkq –

ECO: A80
Opening Name: Dutch Defense: Senechaud Gambit
SAN: 1. d4 f5 2. Bf4 e6 3. g4
UCI: d2d4 f7f5 c1f4 e7e6 g2g4
FEN: rnbqkbnr/pppp2pp/4p3/5p2/3P1BP1/8/PPP1PP1P/RN1QKBNR b KQkq –

ECO: A80
Opening Name: Dutch Defense: Spielmann Gambit
SAN: 1. d4 f5 2. Nc3 Nf6 3. g4
UCI: d2d4 f7f5 b1c3 g8f6 g2g4
FEN: rnbqkb1r/ppppp1pp/5n2/5p2/3P2P1/2N5/PPP1PP1P/R1BQKBNR b KQkq –

ECO: A80
Opening Name: Queen’s Pawn Game: Veresov Attack, Dutch System
SAN: 1. d4 f5 2. Nc3 d5
UCI: d2d4 f7f5 b1c3 d7d5
FEN: rnbqkbnr/ppp1p1pp/8/3p1p2/3P4/2N5/PPP1PPPP/R1BQKBNR w KQkq –

ECO: A81
Opening Name: Dutch Defense: Blackburne Variation
SAN: 1. d4 f5 2. g3 Nf6 3. Bg2 e6 4. Nh3
UCI: d2d4 f7f5 g2g3 g8f6 f1g2 e7e6 g1h3
FEN: rnbqkb1r/pppp2pp/4pn2/5p2/3P4/6PN/PPP1PPBP/RNBQK2R b KQkq –

ECO: A81
Opening Name: Dutch Defense: Fianchetto Attack
SAN: 1. d4 f5 2. g3
UCI: d2d4 f7f5 g2g3
FEN: rnbqkbnr/ppppp1pp/8/5p2/3P4/6P1/PPP1PP1P/RNBQKBNR b KQkq –

ECO: A81
Opening Name: Dutch Defense: Leningrad Variation, Carlsbad Variation
SAN: 1. d4 f5 2. g3 g6 3. Bg2 Bg7 4. Nh3
UCI: d2d4 f7f5 g2g3 g7g6 f1g2 f8g7 g1h3
FEN: rnbqk1nr/ppppp1bp/6p1/5p2/3P4/6PN/PPP1PPBP/RNBQK2R b KQkq –

ECO: A81
Opening Name: Dutch Defense: Leningrad, Basman System
SAN: 1. d4 f5 2. g3 c6 3. Bg2 g6 4. Nf3 Bg7 5. O-O Nh6
UCI: d2d4 f7f5 g2g3 c7c6 f1g2 g7g6 g1f3 f8g7 e1g1 g8h6
FEN: rnbqk2r/pp1pp1bp/2p3pn/5p2/3P4/5NP1/PPP1PPBP/RNBQ1RK1 w kq –

ECO: A81
Opening Name: Dutch Defense: Semi-Leningrad Variation
SAN: 1. d4 f5 2. g3 Nf6 3. Bg2 g6
UCI: d2d4 f7f5 g2g3 g8f6 f1g2 g7g6
FEN: rnbqkb1r/ppppp2p/5np1/5p2/3P4/6P1/PPP1PPBP/RNBQK1NR w KQkq –

ECO: A82
Opening Name: Dutch Defense: Blackmar’s Second Gambit
SAN: 1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. f3
UCI: d2d4 f7f5 e2e4 f5e4 b1c3 g8f6 f2f3
FEN: rnbqkb1r/ppppp1pp/5n2/8/3Pp3/2N2P2/PPP3PP/R1BQKBNR b KQkq –

ECO: A82
Opening Name: Dutch Defense: Staunton Gambit
SAN: 1. d4 f5 2. e4
UCI: d2d4 f7f5 e2e4
FEN: rnbqkbnr/ppppp1pp/8/5p2/3PP3/8/PPP2PPP/RNBQKBNR b KQkq –

ECO: A82
Opening Name: Dutch Defense: Staunton Gambit Accepted
SAN: 1. d4 f5 2. e4 fxe4
UCI: d2d4 f7f5 e2e4 f5e4
FEN: rnbqkbnr/ppppp1pp/8/8/3Pp3/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: A82
Opening Name: Dutch Defense: Staunton Gambit, American Attack
SAN: 1. d4 f5 2. e4 fxe4 3. Nd2
UCI: d2d4 f7f5 e2e4 f5e4 b1d2
FEN: rnbqkbnr/ppppp1pp/8/8/3Pp3/8/PPPN1PPP/R1BQKBNR b KQkq –

ECO: A82
Opening Name: Dutch Defense: Staunton Gambit, Tartakower Variation
SAN: 1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. g4
UCI: d2d4 f7f5 e2e4 f5e4 b1c3 g8f6 g2g4
FEN: rnbqkb1r/ppppp1pp/5n2/8/3Pp1P1/2N5/PPP2P1P/R1BQKBNR b KQkq –

ECO: A82
Opening Name: Rat Defense: Balogh Defense
SAN: 1. e4 d6 2. d4 f5
UCI: e2e4 d7d6 d2d4 f7f5
FEN: rnbqkbnr/ppp1p1pp/3p4/5p2/3PP3/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: A83
Opening Name: Dutch Defense: Staunton Gambit
SAN: 1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. Bg5
UCI: d2d4 f7f5 e2e4 f5e4 b1c3 g8f6 c1g5
FEN: rnbqkb1r/ppppp1pp/5n2/6B1/3Pp3/2N5/PPP2PPP/R2QKBNR b KQkq –

ECO: A83
Opening Name: Dutch Defense: Staunton Gambit, Alekhine Variation
SAN: 1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. Bg5 g6 5. h4
UCI: d2d4 f7f5 e2e4 f5e4 b1c3 g8f6 c1g5 g7g6 h2h4
FEN: rnbqkb1r/ppppp2p/5np1/6B1/3Pp2P/2N5/PPP2PP1/R2QKBNR b KQkq –

ECO: A83
Opening Name: Dutch Defense: Staunton Gambit, Chigorin Variation
SAN: 1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. Bg5 c6
UCI: d2d4 f7f5 e2e4 f5e4 b1c3 g8f6 c1g5 c7c6
FEN: rnbqkb1r/pp1pp1pp/2p2n2/6B1/3Pp3/2N5/PPP2PPP/R2QKBNR w KQkq –

ECO: A83
Opening Name: Dutch Defense: Staunton Gambit, Lasker Variation
SAN: 1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. Bg5 g6 5. f3
UCI: d2d4 f7f5 e2e4 f5e4 b1c3 g8f6 c1g5 g7g6 f2f3
FEN: rnbqkb1r/ppppp2p/5np1/6B1/3Pp3/2N2P2/PPP3PP/R2QKBNR b KQkq –

ECO: A83
Opening Name: Dutch Defense: Staunton Gambit, Nimzowitsch Variation
SAN: 1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. Bg5 b6
UCI: d2d4 f7f5 e2e4 f5e4 b1c3 g8f6 c1g5 b7b6
FEN: rnbqkb1r/p1ppp1pp/1p3n2/6B1/3Pp3/2N5/PPP2PPP/R2QKBNR w KQkq –

ECO: A84
Opening Name: Dutch Defense
SAN: 1. d4 f5 2. c4
UCI: d2d4 f7f5 c2c4
FEN: rnbqkbnr/ppppp1pp/8/5p2/2PP4/8/PP2PPPP/RNBQKBNR b KQkq –

ECO: A84
Opening Name: Dutch Defense: Bellon Gambit
SAN: 1. d4 f5 2. c4 e6 3. e4
UCI: d2d4 f7f5 c2c4 e7e6 e2e4
FEN: rnbqkbnr/pppp2pp/4p3/5p2/2PPP3/8/PP3PPP/RNBQKBNR b KQkq –

ECO: A84
Opening Name: Dutch Defense: Bladel Variation
SAN: 1. d4 f5 2. c4 g6 3. Nc3 Nh6
UCI: d2d4 f7f5 c2c4 g7g6 b1c3 g8h6
FEN: rnbqkb1r/ppppp2p/6pn/5p2/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq –

ECO: A84
Opening Name: Dutch Defense: Classical Variation
SAN: 1. d4 f5 2. c4 e6
UCI: d2d4 f7f5 c2c4 e7e6
FEN: rnbqkbnr/pppp2pp/4p3/5p2/2PP4/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: A84
Opening Name: Dutch Defense: Krause Variation
SAN: 1. d4 f5 2. c4 Nf6 3. Nc3 d6 4. Nf3 Nc6
UCI: d2d4 f7f5 c2c4 g8f6 b1c3 d7d6 g1f3 b8c6
FEN: r1bqkb1r/ppp1p1pp/2np1n2/5p2/2PP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq –

ECO: A84
Opening Name: Dutch Defense: Normal Variation
SAN: 1. d4 f5 2. c4 Nf6
UCI: d2d4 f7f5 c2c4 g8f6
FEN: rnbqkb1r/ppppp1pp/5n2/5p2/2PP4/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: A84
Opening Name: Dutch Defense: Rubinstein Variation
SAN: 1. d4 f5 2. c4 e6 3. Nc3
UCI: d2d4 f7f5 c2c4 e7e6 b1c3
FEN: rnbqkbnr/pppp2pp/4p3/5p2/2PP4/2N5/PP2PPPP/R1BQKBNR b KQkq –

ECO: A85
Opening Name: Dutch Defense: Queen’s Knight Variation
SAN: 1. d4 f5 2. c4 Nf6 3. Nc3
UCI: d2d4 f7f5 c2c4 g8f6 b1c3
FEN: rnbqkb1r/ppppp1pp/5n2/5p2/2PP4/2N5/PP2PPPP/R1BQKBNR b KQkq –

ECO: A86
Opening Name: Dutch Defense: Fianchetto Variation
SAN: 1. d4 f5 2. c4 Nf6 3. g3
UCI: d2d4 f7f5 c2c4 g8f6 g2g3
FEN: rnbqkb1r/ppppp1pp/5n2/5p2/2PP4/6P1/PP2PP1P/RNBQKBNR b KQkq –

ECO: A86
Opening Name: Dutch Defense: Hort-Antoshin System
SAN: 1. d4 f5 2. c4 Nf6 3. g3 d6 4. Bg2 c6 5. Nc3 Qc7
UCI: d2d4 f7f5 c2c4 g8f6 g2g3 d7d6 f1g2 c7c6 b1c3 d8c7
FEN: rnb1kb1r/ppq1p1pp/2pp1n2/5p2/2PP4/2N3P1/PP2PPBP/R1BQK1NR w KQkq –

ECO: A86
Opening Name: Dutch Defense: Leningrad Variation
SAN: 1. d4 f5 2. c4 Nf6 3. g3 g6
UCI: d2d4 f7f5 c2c4 g8f6 g2g3 g7g6
FEN: rnbqkb1r/ppppp2p/5np1/5p2/2PP4/6P1/PP2PP1P/RNBQKBNR w KQkq –

ECO: A87
Opening Name: Dutch Defense: Leningrad Variation
SAN: 1. d4 f5 2. c4 Nf6 3. g3 g6 4. Bg2 Bg7 5. Nf3
UCI: d2d4 f7f5 c2c4 g8f6 g2g3 g7g6 f1g2 f8g7 g1f3
FEN: rnbqk2r/ppppp1bp/5np1/5p2/2PP4/5NP1/PP2PPBP/RNBQK2R b KQkq –

ECO: A88
Opening Name: Dutch Defense: Leningrad Variation, Warsaw Variation
SAN: 1. d4 f5 2. g3 Nf6 3. Bg2 g6 4. Nf3 Bg7 5. O-O O-O 6. c4 d6 7. Nc3 c6
UCI: d2d4 f7f5 g2g3 g8f6 f1g2 g7g6 g1f3 f8g7 e1g1 e8g8 c2c4 d7d6 b1c3 c7c6
FEN: rnbq1rk1/pp2p1bp/2pp1np1/5p2/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w – –

ECO: A89
Opening Name: Dutch Defense: Leningrad Variation, Matulovic Variation
SAN: 1. d4 f5 2. g3 Nf6 3. Bg2 g6 4. Nf3 Bg7 5. O-O O-O 6. c4 d6 7. Nc3 Nc6
UCI: d2d4 f7f5 g2g3 g8f6 f1g2 g7g6 g1f3 f8g7 e1g1 e8g8 c2c4 d7d6 b1c3 b8c6
FEN: r1bq1rk1/ppp1p1bp/2np1np1/5p2/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w – –

ECO: A90
Opening Name: Dutch Defense: Classical Variation
SAN: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2
UCI: d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2
FEN: rnbqkb1r/pppp2pp/4pn2/5p2/2PP4/6P1/PP2PPBP/RNBQK1NR b KQkq –

ECO: A90
Opening Name: Dutch Defense: Classical Variation
SAN: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 d5 5. Nf3
UCI: d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 d7d5 g1f3
FEN: rnbqkb1r/ppp3pp/4pn2/3p1p2/2PP4/5NP1/PP2PPBP/RNBQK2R b KQkq –

ECO: A90
Opening Name: Dutch Defense: Nimzo-Dutch Variation
SAN: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Bb4+
UCI: d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8b4
FEN: rnbqk2r/pppp2pp/4pn2/5p2/1bPP4/6P1/PP2PPBP/RNBQK1NR w KQkq –

ECO: A90
Opening Name: Dutch Defense: Nimzo-Dutch Variation, Alekhine Variation
SAN: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Bb4+ 5. Bd2 Be7
UCI: d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8b4 c1d2 b4e7
FEN: rnbqk2r/ppppb1pp/4pn2/5p2/2PP4/6P1/PP1BPPBP/RN1QK1NR w KQkq –

ECO: A90
Opening Name: Dutch Defense: Stonewall Variation, Modern Variation
SAN: 1. d4 f5 2. c4 e6 3. Nf3 Nf6 4. g3 c6 5. Bg2 d5 6. O-O Bd6
UCI: d2d4 f7f5 c2c4 e7e6 g1f3 g8f6 g2g3 c7c6 f1g2 d7d5 e1g1 f8d6
FEN: rnbqk2r/pp4pp/2pbpn2/3p1p2/2PP4/5NP1/PP2PPBP/RNBQ1RK1 w kq –

ECO: A91
Opening Name: Dutch Defense: Classical Variation
SAN: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7
UCI: d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7
FEN: rnbqk2r/ppppb1pp/4pn2/5p2/2PP4/6P1/PP2PPBP/RNBQK1NR w KQkq –

ECO: A91
Opening Name: Dutch Defense: Classical Variation, Blackburne Attack
SAN: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nh3
UCI: d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1h3
FEN: rnbqk2r/ppppb1pp/4pn2/5p2/2PP4/6PN/PP2PPBP/RNBQK2R b KQkq –

ECO: A92
Opening Name: Dutch Defense: Alekhine Variation
SAN: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O Ne4
UCI: d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 f6e4
FEN: rnbq1rk1/ppppb1pp/4p3/5p2/2PPn3/5NP1/PP2PPBP/RNBQ1RK1 w – –

ECO: A92
Opening Name: Dutch Defense: Classical Variation
SAN: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O
UCI: d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8
FEN: rnbq1rk1/ppppb1pp/4pn2/5p2/2PP4/5NP1/PP2PPBP/RNBQK2R w KQ –

ECO: A92
Opening Name: Dutch Defense: Stonewall Variation
SAN: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d5 7. Nc3
UCI: d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 d7d5 b1c3
FEN: rnbq1rk1/ppp1b1pp/4pn2/3p1p2/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 b – –

ECO: A92
Opening Name: Dutch Defense: Stonewall Variation
SAN: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d5
UCI: d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 d7d5
FEN: rnbq1rk1/ppp1b1pp/4pn2/3p1p2/2PP4/5NP1/PP2PPBP/RNBQ1RK1 w – –

ECO: A93
Opening Name: Dutch Defense: Stonewall Variation, Botvinnik Variation
SAN: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d5 7. b3
UCI: d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 d7d5 b2b3
FEN: rnbq1rk1/ppp1b1pp/4pn2/3p1p2/2PP4/1P3NP1/P3PPBP/RNBQ1RK1 b – –

ECO: A94
Opening Name: Dutch Defense: Stonewall Variation
SAN: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d5 7. b3 c6 8. Ba3
UCI: d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 d7d5 b2b3 c7c6 c1a3
FEN: rnbq1rk1/pp2b1pp/2p1pn2/3p1p2/2PP4/BP3NP1/P3PPBP/RN1Q1RK1 b – –

ECO: A95
Opening Name: Dutch Defense: Stonewall Variation
SAN: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d5 7. Nc3 c6
UCI: d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 d7d5 b1c3 c7c6
FEN: rnbq1rk1/pp2b1pp/2p1pn2/3p1p2/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w – –

ECO: A95
Opening Name: Dutch Defense: Stonewall Variation, Chekhover Variation
SAN: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d5 7. Nc3 c6 8. Qc2 Qe8 9. Bg5
UCI: d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 d7d5 b1c3 c7c6 d1c2 d8e8 c1g5
FEN: rnb1qrk1/pp2b1pp/2p1pn2/3p1pB1/2PP4/2N2NP1/PPQ1PPBP/R4RK1 b – –

ECO: A96
Opening Name: Dutch Defense: Classical Variation
SAN: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6
UCI: d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 d7d6
FEN: rnbq1rk1/ppp1b1pp/3ppn2/5p2/2PP4/5NP1/PP2PPBP/RNBQ1RK1 w – –

ECO: A96
Opening Name: Dutch Defense: Classical Variation, Buenos Aires Variation
SAN: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6 7. Nc3 a5
UCI: d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 d7d6 b1c3 a7a5
FEN: rnbq1rk1/1pp1b1pp/3ppn2/p4p2/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w – –

ECO: A96
Opening Name: Dutch Defense: Classical Variation, Huisl Variation
SAN: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6 7. Nc3 Ne4
UCI: d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 d7d6 b1c3 f6e4
FEN: rnbq1rk1/ppp1b1pp/3pp3/5p2/2PPn3/2N2NP1/PP2PPBP/R1BQ1RK1 w – –

ECO: A97
Opening Name: Dutch Defense: Classical Variation, Ilyin-Zhenevsky Variation
SAN: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6 7. Nc3 Qe8
UCI: d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 d7d6 b1c3 d8e8
FEN: rnb1qrk1/ppp1b1pp/3ppn2/5p2/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w – –

ECO: A97
Opening Name: Dutch Defense: Classical Variation, Ilyin-Zhenevsky Variation, Winter Variation
SAN: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6 7. Nc3 Qe8 8. Re1
UCI: d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 d7d6 b1c3 d8e8 f1e1
FEN: rnb1qrk1/ppp1b1pp/3ppn2/5p2/2PP4/2N2NP1/PP2PPBP/R1BQR1K1 b – –

ECO: A98
Opening Name: Dutch Defense: Classical Variation, Ilyin-Zhenevsky Variation, Alatortsev-Lisitsyn Line
SAN: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6 7. Nc3 Qe8 8. Qc2
UCI: d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 d7d6 b1c3 d8e8 d1c2
FEN: rnb1qrk1/ppp1b1pp/3ppn2/5p2/2PP4/2N2NP1/PPQ1PPBP/R1B2RK1 b – –

ECO: A99
Opening Name: Dutch Defense: Classical Variation, Ilyin-Zhenevsky Variation, Modern Main Line
SAN: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6 7. Nc3 Qe8 8. b3
UCI: d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 d7d6 b1c3 d8e8 b2b3
FEN: rnb1qrk1/ppp1b1pp/3ppn2/5p2/2PP4/1PN2NP1/P3PPBP/R1BQ1RK1 b – –

ECO: B00
Opening Name: Barnes Defense
SAN: 1. e4 f6
UCI: e2e4 f7f6
FEN: rnbqkbnr/ppppp1pp/5p2/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq –

ECO: B00
Opening Name: Borg Defense
SAN: 1. e4 g5
UCI: e2e4 g7g5
FEN: rnbqkbnr/pppppp1p/8/6p1/4P3/8/PPPP1PPP/RNBQKBNR w KQkq –

ECO: B00
Opening Name: Borg Defense: Borg Gambit
SAN: 1. e4 g5 2. d4 Bg7
UCI: e2e4 g7g5 d2d4 f8g7
FEN: rnbqk1nr/ppppppbp/8/6p1/3PP3/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: B00
Opening Name: Borg Defense: Troon Gambit
SAN: 1. e4 g5 2. d4 h6 3. h4 g4
UCI: e2e4 g7g5 d2d4 h7h6 h2h4 g5g4
FEN: rnbqkbnr/pppppp2/7p/8/3PP1pP/8/PPP2PP1/RNBQKBNR w KQkq –

ECO: B00
Opening Name: Borg Defense: Zilbermints Gambit
SAN: 1. e4 g5 2. d4 e5
UCI: e2e4 g7g5 d2d4 e7e5
FEN: rnbqkbnr/pppp1p1p/8/4p1p1/3PP3/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: B00
Opening Name: Carr Defense
SAN: 1. e4 h6
UCI: e2e4 h7h6
FEN: rnbqkbnr/ppppppp1/7p/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq –

ECO: B00
Opening Name: Carr Defense: Zilbermints Gambit
SAN: 1. e4 h6 2. d4 e5
UCI: e2e4 h7h6 d2d4 e7e5
FEN: rnbqkbnr/pppp1pp1/7p/4p3/3PP3/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: B00
Opening Name: Duras Gambit
SAN: 1. e4 f5
UCI: e2e4 f7f5
FEN: rnbqkbnr/ppppp1pp/8/5p2/4P3/8/PPPP1PPP/RNBQKBNR w KQkq –

ECO: B00
Opening Name: Fried Fox Defense
SAN: 1. e4 f6 2. d4 Kf7
UCI: e2e4 f7f6 d2d4 e8f7
FEN: rnbq1bnr/pppppkpp/5p2/8/3PP3/8/PPP2PPP/RNBQKBNR w KQ –

ECO: B00
Opening Name: Goldsmith Defense
SAN: 1. e4 h5
UCI: e2e4 h7h5
FEN: rnbqkbnr/ppppppp1/8/7p/4P3/8/PPPP1PPP/RNBQKBNR w KQkq –

ECO: B00
Opening Name: Goldsmith Defense: Picklepuss Defense
SAN: 1. e4 h5 2. d4 Nf6
UCI: e2e4 h7h5 d2d4 g8f6
FEN: rnbqkb1r/ppppppp1/5n2/7p/3PP3/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: B00
Opening Name: Guatemala Defense
SAN: 1. e4 b6 2. d4 Ba6
UCI: e2e4 b7b6 d2d4 c8a6
FEN: rn1qkbnr/p1pppppp/bp6/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: B00
Opening Name: Hippopotamus Defense
SAN: 1. e4 Nh6
UCI: e2e4 g8h6
FEN: rnbqkb1r/pppppppp/7n/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq –

ECO: B00
Opening Name: Hippopotamus Defense
SAN: 1. e4 Nh6 2. d4 g6 3. c4 f6
UCI: e2e4 g8h6 d2d4 g7g6 c2c4 f7f6
FEN: rnbqkb1r/ppppp2p/5ppn/8/2PPP3/8/PP3PPP/RNBQKBNR w KQkq –

ECO: B00
Opening Name: King’s Pawn Game
SAN: 1. e4
UCI: e2e4
FEN: rnbqkbnr/pppppppp/8/8/4P3/8/PPPP1PPP/RNBQKBNR b KQkq –

ECO: B00
Opening Name: Lemming Defense
SAN: 1. e4 Na6
UCI: e2e4 b8a6
FEN: r1bqkbnr/pppppppp/n7/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq –

ECO: B00
Opening Name: Lion Defense: Lion’s Jaw
SAN: 1. e4 d6 2. d4 Nf6 3. f3
UCI: e2e4 d7d6 d2d4 g8f6 f2f3
FEN: rnbqkb1r/ppp1pppp/3p1n2/8/3PP3/5P2/PPP3PP/RNBQKBNR b KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense
SAN: 1. e4 Nc6
UCI: e2e4 b8c6
FEN: r1bqkbnr/pppppppp/2n5/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense
SAN: 1. e4 Nc6 2. d4
UCI: e2e4 b8c6 d2d4
FEN: r1bqkbnr/pppppppp/2n5/8/3PP3/8/PPP2PPP/RNBQKBNR b KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense: Breyer Variation
SAN: 1. e4 Nc6 2. Nc3 Nf6 3. d4 e5
UCI: e2e4 b8c6 b1c3 g8f6 d2d4 e7e5
FEN: r1bqkb1r/pppp1ppp/2n2n2/4p3/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense: Colorado Countergambit
SAN: 1. e4 Nc6 2. Nf3 f5
UCI: e2e4 b8c6 g1f3 f7f5
FEN: r1bqkbnr/ppppp1pp/2n5/5p2/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense: Colorado Countergambit Accepted
SAN: 1. e4 Nc6 2. Nf3 f5 3. exf5
UCI: e2e4 b8c6 g1f3 f7f5 e4f5
FEN: r1bqkbnr/ppppp1pp/2n5/5P2/8/5N2/PPPP1PPP/RNBQKB1R b KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense: Declined Variation
SAN: 1. e4 Nc6 2. Nf3
UCI: e2e4 b8c6 g1f3
FEN: r1bqkbnr/pppppppp/2n5/8/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense: El Columpio Defense
SAN: 1. e4 Nc6 2. Nf3 Nf6 3. e5 Ng4
UCI: e2e4 b8c6 g1f3 g8f6 e4e5 f6g4
FEN: r1bqkb1r/pppppppp/2n5/4P3/6n1/5N2/PPPP1PPP/RNBQKB1R w KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense: El Columpio Defense, El Columpio Gambit
SAN: 1. e4 Nc6 2. Nf3 Nf6 3. e5 Ng4 4. d4 d6 5. h3 Nh6 6. e6
UCI: e2e4 b8c6 g1f3 g8f6 e4e5 f6g4 d2d4 d7d6 h2h3 g4h6 e5e6
FEN: r1bqkb1r/ppp1pppp/2npP2n/8/3P4/5N1P/PPP2PP1/RNBQKB1R b KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense: El Columpio Defense, Exchange Variation
SAN: 1. e4 Nc6 2. Nf3 Nf6 3. e5 Ng4 4. d4 d6 5. h3 Nh6 6. exd6
UCI: e2e4 b8c6 g1f3 g8f6 e4e5 f6g4 d2d4 d7d6 h2h3 g4h6 e5d6
FEN: r1bqkb1r/ppp1pppp/2nP3n/8/3P4/5N1P/PPP2PP1/RNBQKB1R b KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense: El Columpio Defense, Pin Variation
SAN: 1. e4 Nc6 2. Nf3 Nf6 3. e5 Ng4 4. d4 d6 5. h3 Nh6 6. Bb5
UCI: e2e4 b8c6 g1f3 g8f6 e4e5 f6g4 d2d4 d7d6 h2h3 g4h6 f1b5
FEN: r1bqkb1r/ppp1pppp/2np3n/1B2P3/3P4/5N1P/PPP2PP1/RNBQK2R b KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense: Franco-Nimzowitsch Variation
SAN: 1. e4 Nc6 2. Nf3 e6
UCI: e2e4 b8c6 g1f3 e7e6
FEN: r1bqkbnr/pppp1ppp/2n1p3/8/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense: French Connection
SAN: 1. e4 Nc6 2. Nc3 e6
UCI: e2e4 b8c6 b1c3 e7e6
FEN: r1bqkbnr/pppp1ppp/2n1p3/8/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense: Hornung Gambit
SAN: 1. e4 Nc6 2. d4 d5 3. Be3
UCI: e2e4 b8c6 d2d4 d7d5 c1e3
FEN: r1bqkbnr/ppp1pppp/2n5/3p4/3PP3/4B3/PPP2PPP/RN1QKBNR b KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense: Kennedy Variation
SAN: 1. e4 Nc6 2. d4 e5
UCI: e2e4 b8c6 d2d4 e7e5
FEN: r1bqkbnr/pppp1ppp/2n5/4p3/3PP3/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense: Kennedy Variation, Bielefelder Gambit
SAN: 1. e4 Nc6 2. d4 e5 3. dxe5 Bc5
UCI: e2e4 b8c6 d2d4 e7e5 d4e5 f8c5
FEN: r1bqk1nr/pppp1ppp/2n5/2b1P3/4P3/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense: Kennedy Variation, Hammer Gambit
SAN: 1. e4 Nc6 2. d4 e5 3. dxe5 f6
UCI: e2e4 b8c6 d2d4 e7e5 d4e5 f7f6
FEN: r1bqkbnr/pppp2pp/2n2p2/4P3/4P3/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense: Kennedy Variation, Herford Gambit
SAN: 1. e4 Nc6 2. d4 e5 3. dxe5 Qh4
UCI: e2e4 b8c6 d2d4 e7e5 d4e5 d8h4
FEN: r1b1kbnr/pppp1ppp/2n5/4P3/4P2q/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense: Kennedy Variation, Keres Attack
SAN: 1. e4 Nc6 2. d4 e5 3. dxe5 Nxe5 4. Nc3
UCI: e2e4 b8c6 d2d4 e7e5 d4e5 c6e5 b1c3
FEN: r1bqkbnr/pppp1ppp/8/4n3/4P3/2N5/PPP2PPP/R1BQKBNR b KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense: Kennedy Variation, Linksspringer Variation
SAN: 1. e4 Nc6 2. d4 e5 3. d5
UCI: e2e4 b8c6 d2d4 e7e5 d4d5
FEN: r1bqkbnr/pppp1ppp/2n5/3Pp3/4P3/8/PPP2PPP/RNBQKBNR b KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense: Kennedy Variation, Main Line
SAN: 1. e4 Nc6 2. d4 e5 3. dxe5 Nxe5 4. f4 Ng6
UCI: e2e4 b8c6 d2d4 e7e5 d4e5 c6e5 f2f4 e5g6
FEN: r1bqkbnr/pppp1ppp/6n1/8/4PP2/8/PPP3PP/RNBQKBNR w KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense: Kennedy Variation, Paulsen Attack
SAN: 1. e4 Nc6 2. d4 e5 3. dxe5 Nxe5 4. Nf3
UCI: e2e4 b8c6 d2d4 e7e5 d4e5 c6e5 g1f3
FEN: r1bqkbnr/pppp1ppp/8/4n3/4P3/5N2/PPP2PPP/RNBQKB1R b KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense: Kennedy Variation, Riemann Defense
SAN: 1. e4 Nc6 2. d4 e5 3. dxe5 Nxe5 4. f4 Nc6
UCI: e2e4 b8c6 d2d4 e7e5 d4e5 c6e5 f2f4 e5c6
FEN: r1bqkbnr/pppp1ppp/2n5/8/4PP2/8/PPP3PP/RNBQKBNR w KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense: Kennedy Variation, de Smet Gambit
SAN: 1. e4 Nc6 2. d4 e5 3. dxe5 d6
UCI: e2e4 b8c6 d2d4 e7e5 d4e5 d7d6
FEN: r1bqkbnr/ppp2ppp/2np4/4P3/4P3/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense: Mikenas Variation
SAN: 1. e4 Nc6 2. d4 d6
UCI: e2e4 b8c6 d2d4 d7d6
FEN: r1bqkbnr/ppp1pppp/2np4/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense: Neo-Mongoloid Defense
SAN: 1. e4 Nc6 2. d4 f6
UCI: e2e4 b8c6 d2d4 f7f6
FEN: r1bqkbnr/ppppp1pp/2n2p2/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense: Pirc Connection
SAN: 1. e4 Nc6 2. Nc3 g6
UCI: e2e4 b8c6 b1c3 g7g6
FEN: r1bqkbnr/pppppp1p/2n3p1/8/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense: Pseudo-Spanish Variation
SAN: 1. e4 Nc6 2. Bb5
UCI: e2e4 b8c6 f1b5
FEN: r1bqkbnr/pppppppp/2n5/1B6/4P3/8/PPPP1PPP/RNBQK1NR b KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense: Scandinavian Variation
SAN: 1. e4 Nc6 2. d4 d5
UCI: e2e4 b8c6 d2d4 d7d5
FEN: r1bqkbnr/ppp1pppp/2n5/3p4/3PP3/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense: Scandinavian Variation, Aachen Gambit
SAN: 1. e4 Nc6 2. d4 d5 3. exd5 Nb4
UCI: e2e4 b8c6 d2d4 d7d5 e4d5 c6b4
FEN: r1bqkbnr/ppp1pppp/8/3P4/1n1P4/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense: Scandinavian Variation, Advance Variation
SAN: 1. e4 Nc6 2. d4 d5 3. e5
UCI: e2e4 b8c6 d2d4 d7d5 e4e5
FEN: r1bqkbnr/ppp1pppp/2n5/3pP3/3P4/8/PPP2PPP/RNBQKBNR b KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense: Scandinavian Variation, Bogoljubow Variation
SAN: 1. e4 Nc6 2. d4 d5 3. Nc3
UCI: e2e4 b8c6 d2d4 d7d5 b1c3
FEN: r1bqkbnr/ppp1pppp/2n5/3p4/3PP3/2N5/PPP2PPP/R1BQKBNR b KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense: Scandinavian Variation, Bogoljubow Variation
SAN: 1. e4 Nc6 2. d4 d5 3. Nc3 dxe4
UCI: e2e4 b8c6 d2d4 d7d5 b1c3 d5e4
FEN: r1bqkbnr/ppp1pppp/2n5/8/3Pp3/2N5/PPP2PPP/R1BQKBNR w KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense: Scandinavian Variation, Bogoljubow Variation, Brandics Gambit
SAN: 1. e4 Nc6 2. d4 d5 3. Nc3 a6
UCI: e2e4 b8c6 d2d4 d7d5 b1c3 a7a6
FEN: r1bqkbnr/1pp1pppp/p1n5/3p4/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense: Scandinavian Variation, Bogoljubow Variation, Erben Gambit
SAN: 1. e4 Nc6 2. d4 d5 3. Nc3 g6
UCI: e2e4 b8c6 d2d4 d7d5 b1c3 g7g6
FEN: r1bqkbnr/ppp1pp1p/2n3p1/3p4/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense: Scandinavian Variation, Bogoljubow Variation, Heinola-Deppe Gambit
SAN: 1. e4 Nc6 2. d4 d5 3. Nc3 e5
UCI: e2e4 b8c6 d2d4 d7d5 b1c3 e7e5
FEN: r1bqkbnr/ppp2ppp/2n5/3pp3/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense: Scandinavian Variation, Bogoljubow Variation, Nimzowitsch Gambit
SAN: 1. e4 Nc6 2. d4 d5 3. Nc3 dxe4 4. d5 Ne5
UCI: e2e4 b8c6 d2d4 d7d5 b1c3 d5e4 d4d5 c6e5
FEN: r1bqkbnr/ppp1pppp/8/3Pn3/4p3/2N5/PPP2PPP/R1BQKBNR w KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense: Scandinavian Variation, Bogoljubow Variation, Richter Gambit
SAN: 1. e4 Nc6 2. d4 d5 3. Nc3 dxe4 4. d5 Nb8 5. f3
UCI: e2e4 b8c6 d2d4 d7d5 b1c3 d5e4 d4d5 c6b8 f2f3
FEN: rnbqkbnr/ppp1pppp/8/3P4/4p3/2N2P2/PPP3PP/R1BQKBNR b KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense: Scandinavian Variation, Bogoljubow Variation, Vehre Variation
SAN: 1. e4 Nc6 2. d4 d5 3. Nc3 Nf6
UCI: e2e4 b8c6 d2d4 d7d5 b1c3 g8f6
FEN: r1bqkb1r/ppp1pppp/2n2n2/3p4/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense: Scandinavian Variation, Exchange Variation
SAN: 1. e4 Nc6 2. d4 d5 3. exd5 Qxd5
UCI: e2e4 b8c6 d2d4 d7d5 e4d5 d8d5
FEN: r1b1kbnr/ppp1pppp/2n5/3q4/3P4/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense: Scandinavian Variation, Exchange Variation, Marshall Gambit
SAN: 1. e4 Nc6 2. d4 d5 3. exd5 Qxd5 4. Nc3
UCI: e2e4 b8c6 d2d4 d7d5 e4d5 d8d5 b1c3
FEN: r1b1kbnr/ppp1pppp/2n5/3q4/3P4/2N5/PPP2PPP/R1BQKBNR b KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense: Wheeler Gambit
SAN: 1. e4 Nc6 2. b4
UCI: e2e4 b8c6 b2b4
FEN: r1bqkbnr/pppppppp/2n5/8/1P2P3/8/P1PP1PPP/RNBQKBNR b KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense: Williams Variation
SAN: 1. e4 Nc6 2. Nf3 d6
UCI: e2e4 b8c6 g1f3 d7d6
FEN: r1bqkbnr/ppp1pppp/2np4/8/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq –

ECO: B00
Opening Name: Nimzowitsch Defense: Woodchuck Variation
SAN: 1. e4 Nc6 2. d4 a6
UCI: e2e4 b8c6 d2d4 a7a6
FEN: r1bqkbnr/1ppppppp/p1n5/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: B00
Opening Name: Owen Defense
SAN: 1. e4 b6
UCI: e2e4 b7b6
FEN: rnbqkbnr/p1pppppp/1p6/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq –

ECO: B00
Opening Name: Owen Defense: Hekili-Loa Gambit
SAN: 1. e4 b6 2. d4 c5 3. dxc5 Nc6
UCI: e2e4 b7b6 d2d4 c7c5 d4c5 b8c6
FEN: r1bqkbnr/p2ppppp/1pn5/2P5/4P3/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: B00
Opening Name: Owen Defense: Matovinsky Gambit
SAN: 1. e4 b6 2. d4 Bb7 3. Bd3 f5 4. exf5 Bxg2 5. Qh5+ g6
UCI: e2e4 b7b6 d2d4 c8b7 f1d3 f7f5 e4f5 b7g2 d1h5 g7g6
FEN: rn1qkbnr/p1ppp2p/1p4p1/5P1Q/3P4/3B4/PPP2PbP/RNB1K1NR w KQkq –

ECO: B00
Opening Name: Owen Defense: Naselwaus Gambit
SAN: 1. e4 b6 2. d4 Bb7 3. Bg5
UCI: e2e4 b7b6 d2d4 c8b7 c1g5
FEN: rn1qkbnr/pbpppppp/1p6/6B1/3PP3/8/PPP2PPP/RN1QKBNR b KQkq –

ECO: B00
Opening Name: Owen Defense: Smith Gambit
SAN: 1. e4 b6 2. d4 Bb7 3. Nf3
UCI: e2e4 b7b6 d2d4 c8b7 g1f3
FEN: rn1qkbnr/pbpppppp/1p6/8/3PP3/5N2/PPP2PPP/RNBQKB1R b KQkq –

ECO: B00
Opening Name: Owen Defense: Unicorn Variation
SAN: 1. e4 f6 2. d4 b6 3. c4 Bb7
UCI: e2e4 f7f6 d2d4 b7b6 c2c4 c8b7
FEN: rn1qkbnr/pbppp1pp/1p3p2/8/2PPP3/8/PP3PPP/RNBQKBNR w KQkq –

ECO: B00
Opening Name: Owen Defense: Wind Gambit
SAN: 1. e4 b6 2. d4 Bb7 3. f3 e5
UCI: e2e4 b7b6 d2d4 c8b7 f2f3 e7e5
FEN: rn1qkbnr/pbpp1ppp/1p6/4p3/3PP3/5P2/PPP3PP/RNBQKBNR w KQkq –

ECO: B00
Opening Name: Pirc Defense
SAN: 1. e4 d6
UCI: e2e4 d7d6
FEN: rnbqkbnr/ppp1pppp/3p4/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq –

ECO: B00
Opening Name: Pirc Defense
SAN: 1. e4 d6 2. d4
UCI: e2e4 d7d6 d2d4
FEN: rnbqkbnr/ppp1pppp/3p4/8/3PP3/8/PPP2PPP/RNBQKBNR b KQkq –

ECO: B00
Opening Name: Pirc Defense
SAN: 1. e4 d6 2. d4 Nf6
UCI: e2e4 d7d6 d2d4 g8f6
FEN: rnbqkb1r/ppp1pppp/3p1n2/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: B00
Opening Name: Pirc Defense: Roscher Gambit
SAN: 1. e4 d6 2. d4 Nf6 3. Nf3
UCI: e2e4 d7d6 d2d4 g8f6 g1f3
FEN: rnbqkb1r/ppp1pppp/3p1n2/8/3PP3/5N2/PPP2PPP/RNBQKB1R b KQkq –

ECO: B00
Opening Name: Rat Defense: Antal Defense
SAN: 1. e4 d6 2. d4 Nd7
UCI: e2e4 d7d6 d2d4 b8d7
FEN: r1bqkbnr/pppnpppp/3p4/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: B00
Opening Name: Rat Defense: Fuller Gambit
SAN: 1. e4 d6 2. f4 d5 3. exd5 Nf6
UCI: e2e4 d7d6 f2f4 d6d5 e4d5 g8f6
FEN: rnbqkb1r/ppp1pppp/5n2/3P4/5P2/8/PPPP2PP/RNBQKBNR w KQkq –

ECO: B00
Opening Name: Rat Defense: Harmonist
SAN: 1. e4 d6 2. f4
UCI: e2e4 d7d6 f2f4
FEN: rnbqkbnr/ppp1pppp/3p4/8/4PP2/8/PPPP2PP/RNBQKBNR b KQkq –

ECO: B00
Opening Name: Rat Defense: Petruccioli Attack
SAN: 1. e4 d6 2. h4
UCI: e2e4 d7d6 h2h4
FEN: rnbqkbnr/ppp1pppp/3p4/8/4P2P/8/PPPP1PP1/RNBQKBNR b KQkq –

ECO: B00
Opening Name: Rat Defense: Spike Attack
SAN: 1. e4 d6 2. g4
UCI: e2e4 d7d6 g2g4
FEN: rnbqkbnr/ppp1pppp/3p4/8/4P1P1/8/PPPP1P1P/RNBQKBNR b KQkq –

ECO: B00
Opening Name: St. George Defense
SAN: 1. e4 a6
UCI: e2e4 a7a6
FEN: rnbqkbnr/1ppppppp/p7/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq –

ECO: B00
Opening Name: St. George Defense: Polish Variation
SAN: 1. e4 a6 2. d4 b5 3. Nf3 Bb7 4. Bd3 e6
UCI: e2e4 a7a6 d2d4 b7b5 g1f3 c8b7 f1d3 e7e6
FEN: rn1qkbnr/1bpp1ppp/p3p3/1p6/3PP3/3B1N2/PPP2PPP/RNBQK2R w KQkq –

ECO: B00
Opening Name: St. George Defense: San Jorge Variation
SAN: 1. e4 a6 2. d4 b5 3. Nf3 Bb7 4. Bd3 d6 5. O-O g6 6. c3 Bg7
UCI: e2e4 a7a6 d2d4 b7b5 g1f3 c8b7 f1d3 d7d6 e1g1 g7g6 c2c3 f8g7
FEN: rn1qk1nr/1bp1ppbp/p2p2p1/1p6/3PP3/2PB1N2/PP3PPP/RNBQ1RK1 w kq –

ECO: B00
Opening Name: St. George Defense: Zilbermints Gambit
SAN: 1. e4 a6 2. d4 e5
UCI: e2e4 a7a6 d2d4 e7e5
FEN: rnbqkbnr/1ppp1ppp/p7/4p3/3PP3/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: B00
Opening Name: Van Geet Opening: Berlin Gambit
SAN: 1. e4 Nc6 2. d4 d5 3. Nc3 dxe4 4. d5
UCI: e2e4 b8c6 d2d4 d7d5 b1c3 d5e4 d4d5
FEN: r1bqkbnr/ppp1pppp/2n5/3P4/4p3/2N5/PPP2PPP/R1BQKBNR b KQkq –

ECO: B00
Opening Name: Ware Defense
SAN: 1. e4 a5
UCI: e2e4 a7a5
FEN: rnbqkbnr/1ppppppp/8/p7/4P3/8/PPPP1PPP/RNBQKBNR w KQkq –

ECO: B00
Opening Name: Ware Defense: Snagglepuss Defense
SAN: 1. e4 a5 2. d4 Nc6
UCI: e2e4 a7a5 d2d4 b8c6
FEN: r1bqkbnr/1ppppppp/2n5/p7/3PP3/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: B01
Opening Name: Scandinavian Defense
SAN: 1. e4 d5
UCI: e2e4 d7d5
FEN: rnbqkbnr/ppp1pppp/8/3p4/4P3/8/PPPP1PPP/RNBQKBNR w KQkq –

ECO: B01
Opening Name: Scandinavian Defense
SAN: 1. e4 d5 2. b3
UCI: e2e4 d7d5 b2b3
FEN: rnbqkbnr/ppp1pppp/8/3p4/4P3/1P6/P1PP1PPP/RNBQKBNR b KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Anderssen Counterattack
SAN: 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 e5
UCI: e2e4 d7d5 e4d5 d8d5 b1c3 d5a5 d2d4 e7e5
FEN: rnb1kbnr/ppp2ppp/8/q3p3/3P4/2N5/PPP2PPP/R1BQKBNR w KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Anderssen Counterattack, Collijn Variation
SAN: 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 e5 5. Nf3 Bg4
UCI: e2e4 d7d5 e4d5 d8d5 b1c3 d5a5 d2d4 e7e5 g1f3 c8g4
FEN: rn2kbnr/ppp2ppp/8/q3p3/3P2b1/2N2N2/PPP2PPP/R1BQKB1R w KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Anderssen Counterattack, Goteborg System
SAN: 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 e5 5. Nf3
UCI: e2e4 d7d5 e4d5 d8d5 b1c3 d5a5 d2d4 e7e5 g1f3
FEN: rnb1kbnr/ppp2ppp/8/q3p3/3P4/2N2N2/PPP2PPP/R1BQKB1R b KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Anderssen Counterattack, Orthodox Attack
SAN: 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 e5 5. dxe5 Nc6 6. Nf3 Bb4 7. Bd2
UCI: e2e4 d7d5 e4d5 d8d5 b1c3 d5a5 d2d4 e7e5 d4e5 b8c6 g1f3 f8b4 c1d2
FEN: r1b1k1nr/ppp2ppp/2n5/q3P3/1b6/2N2N2/PPPB1PPP/R2QKB1R b KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Blackburne Gambit
SAN: 1. e4 d5 2. exd5 c6 3. dxc6 Nxc6
UCI: e2e4 d7d5 e4d5 c7c6 d5c6 b8c6
FEN: r1bqkbnr/pp2pppp/2n5/8/8/8/PPPP1PPP/RNBQKBNR w KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Blackburne-Kloosterboer Gambit
SAN: 1. e4 d5 2. exd5 c6
UCI: e2e4 d7d5 e4d5 c7c6
FEN: rnbqkbnr/pp2pppp/2p5/3P4/8/8/PPPP1PPP/RNBQKBNR w KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Boehnke Gambit
SAN: 1. e4 d5 2. exd5 e5 3. dxe6 Bxe6
UCI: e2e4 d7d5 e4d5 e7e5 d5e6 c8e6
FEN: rn1qkbnr/ppp2ppp/4b3/8/8/8/PPPP1PPP/RNBQKBNR w KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Bronstein Variation
SAN: 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd6 4. d4 Nf6 5. Nf3 a6
UCI: e2e4 d7d5 e4d5 d8d5 b1c3 d5d6 d2d4 g8f6 g1f3 a7a6
FEN: rnb1kb1r/1pp1pppp/p2q1n2/8/3P4/2N2N2/PPP2PPP/R1BQKB1R w KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Classical Variation
SAN: 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Nf3 Bf5
UCI: e2e4 d7d5 e4d5 d8d5 b1c3 d5a5 d2d4 g8f6 g1f3 c8f5
FEN: rn2kb1r/ppp1pppp/5n2/q4b2/3P4/2N2N2/PPP2PPP/R1BQKB1R w KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Grünfeld Variation
SAN: 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Nf3 Bf5 6. Ne5 c6 7. g4
UCI: e2e4 d7d5 e4d5 d8d5 b1c3 d5a5 d2d4 g8f6 g1f3 c8f5 f3e5 c7c6 g2g4
FEN: rn2kb1r/pp2pppp/2p2n2/q3Nb2/3P2P1/2N5/PPP2P1P/R1BQKB1R b KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Gubinsky-Melts Defense
SAN: 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd6
UCI: e2e4 d7d5 e4d5 d8d5 b1c3 d5d6
FEN: rnb1kbnr/ppp1pppp/3q4/8/8/2N5/PPPP1PPP/R1BQKBNR w KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Icelandic-Palme Gambit
SAN: 1. e4 d5 2. exd5 Nf6 3. c4 e6
UCI: e2e4 d7d5 e4d5 g8f6 c2c4 e7e6
FEN: rnbqkb1r/ppp2ppp/4pn2/3P4/2P5/8/PP1P1PPP/RNBQKBNR w KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Kiel Variation
SAN: 1. e4 d5 2. exd5 Nf6 3. d4 Nxd5 4. c4 Nb4
UCI: e2e4 d7d5 e4d5 g8f6 d2d4 f6d5 c2c4 d5b4
FEN: rnbqkb1r/ppp1pppp/8/8/1nPP4/8/PP3PPP/RNBQKBNR w KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Kloosterboer Gambit
SAN: 1. e4 d5 2. exd5 c6 3. dxc6 e5
UCI: e2e4 d7d5 e4d5 c7c6 d5c6 e7e5
FEN: rnbqkbnr/pp3ppp/2P5/4p3/8/8/PPPP1PPP/RNBQKBNR w KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Kádas Gambit
SAN: 1. e4 d5 2. exd5 Nf6 3. d4 c6 4. dxc6 e5
UCI: e2e4 d7d5 e4d5 g8f6 d2d4 c7c6 d5c6 e7e5
FEN: rnbqkb1r/pp3ppp/2P2n2/4p3/3P4/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Lasker Variation
SAN: 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Nf3 Bg4 6. h3
UCI: e2e4 d7d5 e4d5 d8d5 b1c3 d5a5 d2d4 g8f6 g1f3 c8g4 h2h3
FEN: rn2kb1r/ppp1pppp/5n2/q7/3P2b1/2N2N1P/PPP2PP1/R1BQKB1R b KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Main Line
SAN: 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5
UCI: e2e4 d7d5 e4d5 d8d5 b1c3 d5a5
FEN: rnb1kbnr/ppp1pppp/8/q7/8/2N5/PPPP1PPP/R1BQKBNR w KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Main Line, Leonhardt Gambit
SAN: 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. b4
UCI: e2e4 d7d5 e4d5 d8d5 b1c3 d5a5 b2b4
FEN: rnb1kbnr/ppp1pppp/8/q7/1P6/2N5/P1PP1PPP/R1BQKBNR b KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Main Line, Mieses Variation
SAN: 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6
UCI: e2e4 d7d5 e4d5 d8d5 b1c3 d5a5 d2d4 g8f6
FEN: rnb1kb1r/ppp1pppp/5n2/q7/3P4/2N5/PPP2PPP/R1BQKBNR w KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Marshall Variation
SAN: 1. e4 d5 2. exd5 Nf6 3. d4 Nxd5
UCI: e2e4 d7d5 e4d5 g8f6 d2d4 f6d5
FEN: rnbqkb1r/ppp1pppp/8/3n4/3P4/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Mieses-Kotroc Variation
SAN: 1. e4 d5 2. exd5 Qxd5
UCI: e2e4 d7d5 e4d5 d8d5
FEN: rnb1kbnr/ppp1pppp/8/3q4/8/8/PPPP1PPP/RNBQKBNR w KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Modern Variation
SAN: 1. e4 d5 2. exd5 Nf6
UCI: e2e4 d7d5 e4d5 g8f6
FEN: rnbqkb1r/ppp1pppp/5n2/3P4/8/8/PPPP1PPP/RNBQKBNR w KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Modern Variation
SAN: 1. e4 d5 2. exd5 Nf6 3. d4
UCI: e2e4 d7d5 e4d5 g8f6 d2d4
FEN: rnbqkb1r/ppp1pppp/5n2/3P4/3P4/8/PPP2PPP/RNBQKBNR b KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Modern Variation, Gipslis Variation
SAN: 1. e4 d5 2. exd5 Nf6 3. d4 Nxd5 4. Nf3 Bg4
UCI: e2e4 d7d5 e4d5 g8f6 d2d4 f6d5 g1f3 c8g4
FEN: rn1qkb1r/ppp1pppp/8/3n4/3P2b1/5N2/PPP2PPP/RNBQKB1R w KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Modern Variation, Wing Gambit
SAN: 1. e4 d5 2. exd5 Nf6 3. d4 g6 4. c4 b5
UCI: e2e4 d7d5 e4d5 g8f6 d2d4 g7g6 c2c4 b7b5
FEN: rnbqkb1r/p1p1pp1p/5np1/1p1P4/2PP4/8/PP3PPP/RNBQKBNR w KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Panov Transfer
SAN: 1. e4 d5 2. exd5 Nf6 3. c4 c6
UCI: e2e4 d7d5 e4d5 g8f6 c2c4 c7c6
FEN: rnbqkb1r/pp2pppp/2p2n2/3P4/2P5/8/PP1P1PPP/RNBQKBNR w KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Portuguese Gambit
SAN: 1. e4 d5 2. exd5 Nf6 3. d4 Bg4
UCI: e2e4 d7d5 e4d5 g8f6 d2d4 c8g4
FEN: rn1qkb1r/ppp1pppp/5n2/3P4/3P2b1/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Portuguese Gambit, Banker Variation
SAN: 1. e4 d5 2. exd5 Nf6 3. d4 Bg4 4. f3 Bf5 5. c4
UCI: e2e4 d7d5 e4d5 g8f6 d2d4 c8g4 f2f3 g4f5 c2c4
FEN: rn1qkb1r/ppp1pppp/5n2/3P1b2/2PP4/5P2/PP4PP/RNBQKBNR b KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Portuguese Gambit, Classical Variation
SAN: 1. e4 d5 2. exd5 Nf6 3. d4 Bg4 4. Nf3
UCI: e2e4 d7d5 e4d5 g8f6 d2d4 c8g4 g1f3
FEN: rn1qkb1r/ppp1pppp/5n2/3P4/3P2b1/5N2/PPP2PPP/RNBQKB1R b KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Portuguese Gambit, Correspondence Refutation
SAN: 1. e4 d5 2. exd5 Nf6 3. d4 Bg4 4. f3 Bf5 5. g4
UCI: e2e4 d7d5 e4d5 g8f6 d2d4 c8g4 f2f3 g4f5 g2g4
FEN: rn1qkb1r/ppp1pppp/5n2/3P1b2/3P2P1/5P2/PPP4P/RNBQKBNR b KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Portuguese Gambit, Elbow Variation
SAN: 1. e4 d5 2. exd5 Nf6 3. d4 Bg4 4. Bb5+ c6
UCI: e2e4 d7d5 e4d5 g8f6 d2d4 c8g4 f1b5 c7c6
FEN: rn1qkb1r/pp2pppp/2p2n2/1B1P4/3P2b1/8/PPP2PPP/RNBQK1NR w KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Portuguese Gambit, Jadoul Variation
SAN: 1. e4 d5 2. exd5 Nf6 3. d4 Bg4 4. f3 Bf5 5. Bb5+ Nbd7 6. c4
UCI: e2e4 d7d5 e4d5 g8f6 d2d4 c8g4 f2f3 g4f5 f1b5 b8d7 c2c4
FEN: r2qkb1r/pppnpppp/5n2/1B1P1b2/2PP4/5P2/PP4PP/RNBQK1NR b KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Portuguese Gambit, Lusophobe Variation
SAN: 1. e4 d5 2. exd5 Nf6 3. d4 Bg4 4. Bb5+ Nbd7 5. Be2
UCI: e2e4 d7d5 e4d5 g8f6 d2d4 c8g4 f1b5 b8d7 b5e2
FEN: r2qkb1r/pppnpppp/5n2/3P4/3P2b1/8/PPP1BPPP/RNBQK1NR b KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Portuguese Gambit, Melbourne Shuffle Variation
SAN: 1. e4 d5 2. exd5 Nf6 3. d4 Bg4 4. f3 Bf5 5. Bb5+ Nbd7 6. Nc3
UCI: e2e4 d7d5 e4d5 g8f6 d2d4 c8g4 f2f3 g4f5 f1b5 b8d7 b1c3
FEN: r2qkb1r/pppnpppp/5n2/1B1P1b2/3P4/2N2P2/PPP3PP/R1BQK1NR b KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Portuguese Gambit, Wuss Variation
SAN: 1. e4 d5 2. exd5 Nf6 3. d4 Bg4 4. Be2
UCI: e2e4 d7d5 e4d5 g8f6 d2d4 c8g4 f1e2
FEN: rn1qkb1r/ppp1pppp/5n2/3P4/3P2b1/8/PPP1BPPP/RNBQK1NR b KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Richter Variation
SAN: 1. e4 d5 2. exd5 Nf6 3. d4 Nxd5 4. Nf3 g6
UCI: e2e4 d7d5 e4d5 g8f6 d2d4 f6d5 g1f3 g7g6
FEN: rnbqkb1r/ppp1pp1p/6p1/3n4/3P4/5N2/PPP2PPP/RNBQKB1R w KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Richter Variation
SAN: 1. e4 d5 2. exd5 Nf6 3. d4 g6
UCI: e2e4 d7d5 e4d5 g8f6 d2d4 g7g6
FEN: rnbqkb1r/ppp1pp1p/5np1/3P4/3P4/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Schiller-Pytel Variation
SAN: 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd6 4. d4 c6
UCI: e2e4 d7d5 e4d5 d8d5 b1c3 d5d6 d2d4 c7c6
FEN: rnb1kbnr/pp2pppp/2pq4/8/3P4/2N5/PPP2PPP/R1BQKBNR w KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Schiller-Pytel Variation, Modern Variation
SAN: 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd6 4. d4 Nf6 5. Bc4 c6 6. Nge2 Bf5 7. Bf4 Qb4
UCI: e2e4 d7d5 e4d5 d8d5 b1c3 d5d6 d2d4 g8f6 f1c4 c7c6 g1e2 c8f5 c1f4 d6b4
FEN: rn2kb1r/pp2pppp/2p2n2/5b2/1qBP1B2/2N5/PPP1NPPP/R2QK2R w KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Valencian Variation
SAN: 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd8
UCI: e2e4 d7d5 e4d5 d8d5 b1c3 d5d8
FEN: rnbqkbnr/ppp1pppp/8/8/8/2N5/PPPP1PPP/R1BQKBNR w KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Valencian Variation, Ilundain Variation
SAN: 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd8 4. d4 Nf6 5. Nf3 c6
UCI: e2e4 d7d5 e4d5 d8d5 b1c3 d5d8 d2d4 g8f6 g1f3 c7c6
FEN: rnbqkb1r/pp2pppp/2p2n2/8/3P4/2N2N2/PPP2PPP/R1BQKB1R w KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Valencian Variation, Main Line
SAN: 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd8 4. d4 Nf6 5. Nf3 Bg4
UCI: e2e4 d7d5 e4d5 d8d5 b1c3 d5d8 d2d4 g8f6 g1f3 c8g4
FEN: rn1qkb1r/ppp1pppp/5n2/8/3P2b1/2N2N2/PPP2PPP/R1BQKB1R w KQkq –

ECO: B01
Opening Name: Scandinavian Defense: Zilbermints Gambit
SAN: 1. e4 d5 2. b4
UCI: e2e4 d7d5 b2b4
FEN: rnbqkbnr/ppp1pppp/8/3p4/1P2P3/8/P1PP1PPP/RNBQKBNR b KQkq –

ECO: B01
Opening Name: Van Geet Opening: Grünfeld Defense
SAN: 1. e4 d5 2. Nc3 dxe4 3. Nxe4 e5
UCI: e2e4 d7d5 b1c3 d5e4 c3e4 e7e5
FEN: rnbqkbnr/ppp2ppp/8/4p3/4N3/8/PPPP1PPP/R1BQKBNR w KQkq –

ECO: B02
Opening Name: Alekhine Defense
SAN: 1. e4 Nf6
UCI: e2e4 g8f6
FEN: rnbqkb1r/pppppppp/5n2/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq –

ECO: B02
Opening Name: Alekhine Defense: Brooklyn Variation
SAN: 1. e4 Nf6 2. e5 Ng8
UCI: e2e4 g8f6 e4e5 f6g8
FEN: rnbqkbnr/pppppppp/8/4P3/8/8/PPPP1PPP/RNBQKBNR w KQkq –

ECO: B02
Opening Name: Alekhine Defense: Brooklyn Variation, Everglades Variation
SAN: 1. e4 Nf6 2. e5 Ng8 3. d4 f5
UCI: e2e4 g8f6 e4e5 f6g8 d2d4 f7f5
FEN: rnbqkbnr/ppppp1pp/8/4Pp2/3P4/8/PPP2PPP/RNBQKBNR w KQkq f6

ECO: B02
Opening Name: Alekhine Defense: Buckley Attack
SAN: 1. e4 Nf6 2. e5 Nd5 3. Na3
UCI: e2e4 g8f6 e4e5 f6d5 b1a3
FEN: rnbqkb1r/pppppppp/8/3nP3/8/N7/PPPP1PPP/R1BQKBNR b KQkq –

ECO: B02
Opening Name: Alekhine Defense: Hunt Variation, Lasker Simul Gambit
SAN: 1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. c5 Nd5 5. Bc4 e6 6. Nc3
UCI: e2e4 g8f6 e4e5 f6d5 c2c4 d5b6 c4c5 b6d5 f1c4 e7e6 b1c3
FEN: rnbqkb1r/pppp1ppp/4p3/2PnP3/2B5/2N5/PP1P1PPP/R1BQK1NR b KQkq –

ECO: B02
Opening Name: Alekhine Defense: Hunt Variation, Matsukevich Gambit
SAN: 1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. c5 Nd5 5. Nc3 Nxc3 6. dxc3 d6 7. Bg5
UCI: e2e4 g8f6 e4e5 f6d5 c2c4 d5b6 c4c5 b6d5 b1c3 d5c3 d2c3 d7d6 c1g5
FEN: rnbqkb1r/ppp1pppp/3p4/2P1P1B1/8/2P5/PP3PPP/R2QKBNR b KQkq –

ECO: B02
Opening Name: Alekhine Defense: Hunt Variation, Mikenas Gambit
SAN: 1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. c5 Nd5 5. Bc4 e6 6. Nc3 d6 7. Nxd5 exd5 8. Bxd5
UCI: e2e4 g8f6 e4e5 f6d5 c2c4 d5b6 c4c5 b6d5 f1c4 e7e6 b1c3 d7d6 c3d5 e6d5 c4d5
FEN: rnbqkb1r/ppp2ppp/3p4/2PBP3/8/8/PP1P1PPP/R1BQK1NR b KQkq –

ECO: B02
Opening Name: Alekhine Defense: Kmoch Variation
SAN: 1. e4 Nf6 2. e5 Nd5 3. Bc4 Nb6 4. Bb3 c5 5. d3
UCI: e2e4 g8f6 e4e5 f6d5 f1c4 d5b6 c4b3 c7c5 d2d3
FEN: rnbqkb1r/pp1ppppp/1n6/2p1P3/8/1B1P4/PPP2PPP/RNBQK1NR b KQkq –

ECO: B02
Opening Name: Alekhine Defense: Krejcik Variation
SAN: 1. e4 Nf6 2. Bc4
UCI: e2e4 g8f6 f1c4
FEN: rnbqkb1r/pppppppp/5n2/8/2B1P3/8/PPPP1PPP/RNBQK1NR b KQkq –

ECO: B02
Opening Name: Alekhine Defense: Krejcik Variation, Krejcik Gambit
SAN: 1. e4 Nf6 2. Bc4 Nxe4 3. Bxf7+
UCI: e2e4 g8f6 f1c4 f6e4 c4f7
FEN: rnbqkb1r/pppppBpp/8/8/4n3/8/PPPP1PPP/RNBQK1NR b KQkq –

ECO: B02
Opening Name: Alekhine Defense: Maróczy Variation
SAN: 1. e4 Nf6 2. d3
UCI: e2e4 g8f6 d2d3
FEN: rnbqkb1r/pppppppp/5n2/8/4P3/3P4/PPP2PPP/RNBQKBNR b KQkq –

ECO: B02
Opening Name: Alekhine Defense: Mokele Mbembe
SAN: 1. e4 Nf6 2. e5 Ne4
UCI: e2e4 g8f6 e4e5 f6e4
FEN: rnbqkb1r/pppppppp/8/4P3/4n3/8/PPPP1PPP/RNBQKBNR w KQkq –

ECO: B02
Opening Name: Alekhine Defense: Mokele Mbembe, Modern Line
SAN: 1. e4 Nf6 2. e5 Ne4 3. d4 f6
UCI: e2e4 g8f6 e4e5 f6e4 d2d4 f7f6
FEN: rnbqkb1r/ppppp1pp/5p2/4P3/3Pn3/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: B02
Opening Name: Alekhine Defense: Mokele Mbembe, Vavra Defense
SAN: 1. e4 Nf6 2. e5 Ne4 3. d4 e6
UCI: e2e4 g8f6 e4e5 f6e4 d2d4 e7e6
FEN: rnbqkb1r/pppp1ppp/4p3/4P3/3Pn3/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: B02
Opening Name: Alekhine Defense: Normal Variation
SAN: 1. e4 Nf6 2. e5 Nd5
UCI: e2e4 g8f6 e4e5 f6d5
FEN: rnbqkb1r/pppppppp/8/3nP3/8/8/PPPP1PPP/RNBQKBNR w KQkq –

ECO: B02
Opening Name: Alekhine Defense: Scandinavian Variation
SAN: 1. e4 Nf6 2. Nc3 d5
UCI: e2e4 g8f6 b1c3 d7d5
FEN: rnbqkb1r/ppp1pppp/5n2/3p4/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq –

ECO: B02
Opening Name: Alekhine Defense: Scandinavian Variation, Geschev Gambit
SAN: 1. e4 Nf6 2. Nc3 d5 3. exd5 c6
UCI: e2e4 g8f6 b1c3 d7d5 e4d5 c7c6
FEN: rnbqkb1r/pp2pppp/2p2n2/3P4/8/2N5/PPPP1PPP/R1BQKBNR w KQkq –

ECO: B02
Opening Name: Alekhine Defense: Scandinavian Variation, Myers Gambit
SAN: 1. e4 Nf6 2. Nc3 d5 3. d3 dxe4 4. Bg5
UCI: e2e4 g8f6 b1c3 d7d5 d2d3 d5e4 c1g5
FEN: rnbqkb1r/ppp1pppp/5n2/6B1/4p3/2NP4/PPP2PPP/R2QKBNR b KQkq –

ECO: B02
Opening Name: Alekhine Defense: Spielmann Gambit
SAN: 1. e4 Nf6 2. Nc3 d5 3. e5 Nfd7 4. e6
UCI: e2e4 g8f6 b1c3 d7d5 e4e5 f6d7 e5e6
FEN: rnbqkb1r/pppnpppp/4P3/3p4/8/2N5/PPPP1PPP/R1BQKBNR b KQkq –

ECO: B02
Opening Name: Alekhine Defense: Steiner Variation
SAN: 1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. b3
UCI: e2e4 g8f6 e4e5 f6d5 c2c4 d5b6 b2b3
FEN: rnbqkb1r/pppppppp/1n6/4P3/2P5/1P6/P2P1PPP/RNBQKBNR b KQkq –

ECO: B02
Opening Name: Alekhine Defense: Sämisch Attack
SAN: 1. e4 Nf6 2. e5 Nd5 3. Nc3
UCI: e2e4 g8f6 e4e5 f6d5 b1c3
FEN: rnbqkb1r/pppppppp/8/3nP3/8/2N5/PPPP1PPP/R1BQKBNR b KQkq –

ECO: B02
Opening Name: Alekhine Defense: The Squirrel
SAN: 1. e4 Nf6 2. e5 Nd5 3. c4 Nf4
UCI: e2e4 g8f6 e4e5 f6d5 c2c4 d5f4
FEN: rnbqkb1r/pppppppp/8/4P3/2P2n2/8/PP1P1PPP/RNBQKBNR w KQkq –

ECO: B02
Opening Name: Alekhine Defense: Two Pawns Attack
SAN: 1. e4 Nf6 2. e5 Nd5 3. c4
UCI: e2e4 g8f6 e4e5 f6d5 c2c4
FEN: rnbqkb1r/pppppppp/8/3nP3/2P5/8/PP1P1PPP/RNBQKBNR b KQkq –

ECO: B02
Opening Name: Alekhine Defense: Two Pawns Attack, Lasker Variation
SAN: 1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. c5
UCI: e2e4 g8f6 e4e5 f6d5 c2c4 d5b6 c4c5
FEN: rnbqkb1r/pppppppp/1n6/2P1P3/8/8/PP1P1PPP/RNBQKBNR b KQkq –

ECO: B02
Opening Name: Alekhine Defense: Two Pawns Attack, Mikenas Variation
SAN: 1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. c5 Nd5 5. Bc4 e6 6. Nc3 d6
UCI: e2e4 g8f6 e4e5 f6d5 c2c4 d5b6 c4c5 b6d5 f1c4 e7e6 b1c3 d7d6
FEN: rnbqkb1r/ppp2ppp/3pp3/2PnP3/2B5/2N5/PP1P1PPP/R1BQK1NR w KQkq –

ECO: B02
Opening Name: Alekhine Defense: Two Pawns Attack, Tate Variation
SAN: 1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. a4
UCI: e2e4 g8f6 e4e5 f6d5 c2c4 d5b6 a2a4
FEN: rnbqkb1r/pppppppp/1n6/4P3/P1P5/8/1P1P1PPP/RNBQKBNR b KQkq –

ECO: B02
Opening Name: Alekhine Defense: Welling Variation
SAN: 1. e4 Nf6 2. e5 Nd5 3. b3
UCI: e2e4 g8f6 e4e5 f6d5 b2b3
FEN: rnbqkb1r/pppppppp/8/3nP3/8/1P6/P1PP1PPP/RNBQKBNR b KQkq –

ECO: B03
Opening Name: Alekhine Defense
SAN: 1. e4 Nf6 2. e5 Nd5 3. d4
UCI: e2e4 g8f6 e4e5 f6d5 d2d4
FEN: rnbqkb1r/pppppppp/8/3nP3/3P4/8/PPP2PPP/RNBQKBNR b KQkq –

ECO: B03
Opening Name: Alekhine Defense
SAN: 1. e4 Nf6 2. e5 Nd5 3. d4 d6
UCI: e2e4 g8f6 e4e5 f6d5 d2d4 d7d6
FEN: rnbqkb1r/ppp1pppp/3p4/3nP3/3P4/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: B03
Opening Name: Alekhine Defense
SAN: 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4
UCI: e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4
FEN: rnbqkb1r/ppp1pppp/3p4/3nP3/2PP4/8/PP3PPP/RNBQKBNR b KQkq –

ECO: B03
Opening Name: Alekhine Defense: Balogh Variation
SAN: 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Bc4
UCI: e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 f1c4
FEN: rnbqkb1r/ppp1pppp/3p4/3nP3/2BP4/8/PPP2PPP/RNBQK1NR b KQkq –

ECO: B03
Opening Name: Alekhine Defense: Exchange Variation
SAN: 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. exd6
UCI: e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 e5d6
FEN: rnbqkb1r/ppp1pppp/1n1P4/8/2PP4/8/PP3PPP/RNBQKBNR b KQkq –

ECO: B03
Opening Name: Alekhine Defense: Exchange Variation, Karpov Variation
SAN: 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. exd6 cxd6 6. Nc3 g6 7. h3 Bg7 8. Nf3 O-O 9. Be2 Nc6 10. O-O Bf5 11. Bf4
UCI: e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 e5d6 c7d6 b1c3 g7g6 h2h3 f8g7 g1f3 e8g8 f1e2 b8c6 e1g1 c8f5 c1f4
FEN: r2q1rk1/pp2ppbp/1nnp2p1/5b2/2PP1B2/2N2N1P/PP2BPP1/R2Q1RK1 b – –

ECO: B03
Opening Name: Alekhine Defense: Exchange Variation, Voronezh Variation
SAN: 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. exd6 cxd6 6. Nc3 g6 7. Be3 Bg7 8. Rc1 O-O 9. b3
UCI: e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 e5d6 c7d6 b1c3 g7g6 c1e3 f8g7 a1c1 e8g8 b2b3
FEN: rnbq1rk1/pp2ppbp/1n1p2p1/8/2PP4/1PN1B3/P4PPP/2RQKBNR b K –

ECO: B03
Opening Name: Alekhine Defense: Four Pawns Attack
SAN: 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4
UCI: e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 f2f4
FEN: rnbqkb1r/ppp1pppp/1n1p4/4P3/2PP1P2/8/PP4PP/RNBQKBNR b KQkq –

ECO: B03
Opening Name: Alekhine Defense: Four Pawns Attack, Cambridge Gambit
SAN: 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 g5
UCI: e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 f2f4 g7g5
FEN: rnbqkb1r/ppp1pp1p/1n1p4/4P1p1/2PP1P2/8/PP4PP/RNBQKBNR w KQkq –

ECO: B03
Opening Name: Alekhine Defense: Four Pawns Attack, Fianchetto Variation
SAN: 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 g6
UCI: e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 f2f4 g7g6
FEN: rnbqkb1r/ppp1pp1p/1n1p2p1/4P3/2PP1P2/8/PP4PP/RNBQKBNR w KQkq –

ECO: B03
Opening Name: Alekhine Defense: Four Pawns Attack, Ilyin-Zhenevsky Variation
SAN: 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 dxe5 6. fxe5 Nc6 7. Nf3 Bg4 8. e6 fxe6 9. c5
UCI: e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 f2f4 d6e5 f4e5 b8c6 g1f3 c8g4 e5e6 f7e6 c4c5
FEN: r2qkb1r/ppp1p1pp/1nn1p3/2P5/3P2b1/5N2/PP4PP/RNBQKB1R b KQkq –

ECO: B03
Opening Name: Alekhine Defense: Four Pawns Attack, Korchnoi Variation
SAN: 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 dxe5 6. fxe5 Bf5 7. Nc3 e6 8. Nf3 Be7 9. Be2 O-O 10. O-O f6
UCI: e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 f2f4 d6e5 f4e5 c8f5 b1c3 e7e6 g1f3 f8e7 f1e2 e8g8 e1g1 f7f6
FEN: rn1q1rk1/ppp1b1pp/1n2pp2/4Pb2/2PP4/2N2N2/PP2B1PP/R1BQ1RK1 w – –

ECO: B03
Opening Name: Alekhine Defense: Four Pawns Attack, Main Line
SAN: 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 dxe5 6. fxe5 Nc6 7. Be3
UCI: e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 f2f4 d6e5 f4e5 b8c6 c1e3
FEN: r1bqkb1r/ppp1pppp/1nn5/4P3/2PP4/4B3/PP4PP/RN1QKBNR b KQkq –

ECO: B03
Opening Name: Alekhine Defense: Four Pawns Attack, Tartakower Variation
SAN: 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 dxe5 6. fxe5 Nc6 7. Be3 Bf5 8. Nc3 e6 9. Nf3 Qd7 10. Be2 O-O-O 11. O-O Be7
UCI: e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 f2f4 d6e5 f4e5 b8c6 c1e3 c8f5 b1c3 e7e6 g1f3 d8d7 f1e2 e8c8 e1g1 f8e7
FEN: 2kr3r/pppqbppp/1nn1p3/4Pb2/2PP4/2N1BN2/PP2B1PP/R2Q1RK1 w – –

ECO: B03
Opening Name: Alekhine Defense: Four Pawns Attack, Trifunovic Variation
SAN: 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 Bf5
UCI: e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 f2f4 c8f5
FEN: rn1qkb1r/ppp1pppp/1n1p4/4Pb2/2PP1P2/8/PP4PP/RNBQKBNR w KQkq –

ECO: B03
Opening Name: Alekhine Defense: Hunt Variation
SAN: 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. c5
UCI: e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 c4c5
FEN: rnbqkb1r/ppp1pppp/1n1p4/2P1P3/3P4/8/PP3PPP/RNBQKBNR b KQkq –

ECO: B03
Opening Name: Alekhine Defense: Modern Variation, Alekhine Gambit
SAN: 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. Nf3 Bg4 6. Be2
UCI: e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 g1f3 c8g4 f1e2
FEN: rn1qkb1r/ppp1pppp/1n1p4/4P3/2PP2b1/5N2/PP2BPPP/RNBQK2R b KQkq –

ECO: B03
Opening Name: Alekhine Defense: O’Sullivan Gambit
SAN: 1. e4 Nf6 2. e5 Nd5 3. d4 b5
UCI: e2e4 g8f6 e4e5 f6d5 d2d4 b7b5
FEN: rnbqkb1r/p1pppppp/8/1p1nP3/3P4/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: B04
Opening Name: Alekhine Defense: Modern Variation
SAN: 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3
UCI: e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 g1f3
FEN: rnbqkb1r/ppp1pppp/3p4/3nP3/3P4/5N2/PPP2PPP/RNBQKB1R b KQkq –

ECO: B04
Opening Name: Alekhine Defense: Modern Variation, Alburt Variation
SAN: 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 g6
UCI: e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 g1f3 g7g6
FEN: rnbqkb1r/ppp1pp1p/3p2p1/3nP3/3P4/5N2/PPP2PPP/RNBQKB1R w KQkq –

ECO: B04
Opening Name: Alekhine Defense: Modern Variation, Keres Variation
SAN: 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 g6 5. Bc4 Nb6 6. Bb3 Bg7 7. a4
UCI: e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 g1f3 g7g6 f1c4 d5b6 c4b3 f8g7 a2a4
FEN: rnbqk2r/ppp1ppbp/1n1p2p1/4P3/P2P4/1B3N2/1PP2PPP/RNBQK2R b KQkq –

ECO: B04
Opening Name: Alekhine Defense: Modern Variation, Larsen Variation
SAN: 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 dxe5
UCI: e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 g1f3 d6e5
FEN: rnbqkb1r/ppp1pppp/8/3np3/3P4/5N2/PPP2PPP/RNBQKB1R w KQkq –

ECO: B04
Opening Name: Alekhine Defense: Modern Variation, Larsen-Haakert Variation
SAN: 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Nc6
UCI: e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 g1f3 b8c6
FEN: r1bqkb1r/ppp1pppp/2np4/3nP3/3P4/5N2/PPP2PPP/RNBQKB1R w KQkq –

ECO: B04
Opening Name: Alekhine Defense: Modern Variation, Schmid Variation
SAN: 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Nb6
UCI: e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 g1f3 d5b6
FEN: rnbqkb1r/ppp1pppp/1n1p4/4P3/3P4/5N2/PPP2PPP/RNBQKB1R w KQkq –

ECO: B05
Opening Name: Alekhine Defense: Modern Variation, Alekhine Variation
SAN: 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4 5. c4
UCI: e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 g1f3 c8g4 c2c4
FEN: rn1qkb1r/ppp1pppp/3p4/3nP3/2PP2b1/5N2/PP3PPP/RNBQKB1R b KQkq –

ECO: B05
Opening Name: Alekhine Defense: Modern Variation, Flohr Variation
SAN: 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4 5. Be2 c6
UCI: e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 g1f3 c8g4 f1e2 c7c6
FEN: rn1qkb1r/pp2pppp/2pp4/3nP3/3P2b1/5N2/PPP1BPPP/RNBQK2R w KQkq –

ECO: B05
Opening Name: Alekhine Defense: Modern Variation, Main Line
SAN: 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4
UCI: e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 g1f3 c8g4
FEN: rn1qkb1r/ppp1pppp/3p4/3nP3/3P2b1/5N2/PPP2PPP/RNBQKB1R w KQkq –

ECO: B05
Opening Name: Alekhine Defense: Modern Variation, Panov Variation
SAN: 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4 5. h3
UCI: e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 g1f3 c8g4 h2h3
FEN: rn1qkb1r/ppp1pppp/3p4/3nP3/3P2b1/5N1P/PPP2PP1/RNBQKB1R b KQkq –

ECO: B05
Opening Name: Alekhine Defense: Modern Variation, Vitolins Attack
SAN: 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4 5. c4 Nb6 6. d5
UCI: e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 g1f3 c8g4 c2c4 d5b6 d4d5
FEN: rn1qkb1r/ppp1pppp/1n1p4/3PP3/2P3b1/5N2/PP3PPP/RNBQKB1R b KQkq –

ECO: B06
Opening Name: Modern Defense
SAN: 1. e4 g6
UCI: e2e4 g7g6
FEN: rnbqkbnr/pppppp1p/6p1/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq –

ECO: B06
Opening Name: Modern Defense
SAN: 1. e4 g6 2. d4 Bg7
UCI: e2e4 g7g6 d2d4 f8g7
FEN: rnbqk1nr/ppppppbp/6p1/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: B06
Opening Name: Modern Defense: Anti-Modern
SAN: 1. e4 g6 2. d4 Bg7 3. Nc3 c6 4. Bc4 d6 5. Qe2
UCI: e2e4 g7g6 d2d4 f8g7 b1c3 c7c6 f1c4 d7d6 d1e2
FEN: rnbqk1nr/pp2ppbp/2pp2p1/8/2BPP3/2N5/PPP1QPPP/R1B1K1NR b KQkq –

ECO: B06
Opening Name: Modern Defense: Bishop Attack
SAN: 1. e4 g6 2. d4 Bg7 3. Bc4
UCI: e2e4 g7g6 d2d4 f8g7 f1c4
FEN: rnbqk1nr/ppppppbp/6p1/8/2BPP3/8/PPP2PPP/RNBQK1NR b KQkq –

ECO: B06
Opening Name: Modern Defense: Bishop Attack, Bücker Gambit
SAN: 1. e4 g6 2. d4 Bg7 3. Bc4 b5
UCI: e2e4 g7g6 d2d4 f8g7 f1c4 b7b5
FEN: rnbqk1nr/p1ppppbp/6p1/1p6/2BPP3/8/PPP2PPP/RNBQK1NR w KQkq –

ECO: B06
Opening Name: Modern Defense: Bishop Attack, Monkey’s Bum
SAN: 1. e4 g6 2. Bc4 Bg7 3. Qf3 e6 4. d4 Bxd4
UCI: e2e4 g7g6 f1c4 f8g7 d1f3 e7e6 d2d4 g7d4
FEN: rnbqk1nr/pppp1p1p/4p1p1/8/2BbP3/5Q2/PPP2PPP/RNB1K1NR w KQkq –

ECO: B06
Opening Name: Modern Defense: Dunworthy Variation
SAN: 1. e4 g6 2. d4 Bg7 3. c4 d5 4. exd5 c6 5. dxc6 Bxd4
UCI: e2e4 g7g6 d2d4 f8g7 c2c4 d7d5 e4d5 c7c6 d5c6 g7d4
FEN: rnbqk1nr/pp2pp1p/2P3p1/8/2Pb4/8/PP3PPP/RNBQKBNR w KQkq –

ECO: B06
Opening Name: Modern Defense: Fianchetto Gambit
SAN: 1. e4 g6 2. d4 f5
UCI: e2e4 g7g6 d2d4 f7f5
FEN: rnbqkbnr/ppppp2p/6p1/5p2/3PP3/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: B06
Opening Name: Modern Defense: Gurgenidze Defense
SAN: 1. e4 g6 2. d4 Bg7 3. Nc3 c6 4. f4 d5 5. e5 h5
UCI: e2e4 g7g6 d2d4 f8g7 b1c3 c7c6 f2f4 d7d5 e4e5 h7h5
FEN: rnbqk1nr/pp2ppb1/2p3p1/3pP2p/3P1P2/2N5/PPP3PP/R1BQKBNR w KQkq –

ECO: B06
Opening Name: Modern Defense: Lizard Defense, Mittenberger Gambit
SAN: 1. e4 g6 2. d4 Bg7 3. Nc3 d5
UCI: e2e4 g7g6 d2d4 f8g7 b1c3 d7d5
FEN: rnbqk1nr/ppp1ppbp/6p1/3p4/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq –

ECO: B06
Opening Name: Modern Defense: Masur Gambit
SAN: 1. e4 g6 2. d4 Nh6 3. Nc3 f5 4. Bxh6 Bxh6 5. exf5 O-O
UCI: e2e4 g7g6 d2d4 g8h6 b1c3 f7f5 c1h6 f8h6 e4f5 e8g8
FEN: rnbq1rk1/ppppp2p/6pb/5P2/3P4/2N5/PPP2PPP/R2QKBNR w KQ –

ECO: B06
Opening Name: Modern Defense: Modern Pterodactyl
SAN: 1. e4 g6 2. d4 Bg7 3. Nc3 c5
UCI: e2e4 g7g6 d2d4 f8g7 b1c3 c7c5
FEN: rnbqk1nr/pp1pppbp/6p1/2p5/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq –

ECO: B06
Opening Name: Modern Defense: Mongredien Defense, with Nc3
SAN: 1. e4 g6 2. d4 Bg7 3. Nc3 b6
UCI: e2e4 g7g6 d2d4 f8g7 b1c3 b7b6
FEN: rnbqk1nr/p1ppppbp/1p4p1/8/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq –

ECO: B06
Opening Name: Modern Defense: Mongredien Defense, with Nf3
SAN: 1. e4 g6 2. d4 Bg7 3. Nf3 b6
UCI: e2e4 g7g6 d2d4 f8g7 g1f3 b7b6
FEN: rnbqk1nr/p1ppppbp/1p4p1/8/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq –

ECO: B06
Opening Name: Modern Defense: Norwegian Defense
SAN: 1. e4 g6 2. d4 Nf6
UCI: e2e4 g7g6 d2d4 g8f6
FEN: rnbqkb1r/pppppp1p/5np1/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: B06
Opening Name: Modern Defense: Norwegian Defense, Norwegian Gambit
SAN: 1. e4 g6 2. d4 Nf6 3. e5 Nh5 4. Be2 d6
UCI: e2e4 g7g6 d2d4 g8f6 e4e5 f6h5 f1e2 d7d6
FEN: rnbqkb1r/ppp1pp1p/3p2p1/4P2n/3P4/8/PPP1BPPP/RNBQK1NR w KQkq –

ECO: B06
Opening Name: Modern Defense: Pseudo-Austrian Attack
SAN: 1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. f4
UCI: e2e4 g7g6 d2d4 f8g7 b1c3 d7d6 f2f4
FEN: rnbqk1nr/ppp1ppbp/3p2p1/8/3PPP2/2N5/PPP3PP/R1BQKBNR b KQkq –

ECO: B06
Opening Name: Modern Defense: Semi-Averbakh Variation, Pterodactyl Variation Declined
SAN: 1. e4 g6 2. d4 Bg7 3. c4 c5 4. Nf3 d6 5. Be2 Qa5+
UCI: e2e4 g7g6 d2d4 f8g7 c2c4 c7c5 g1f3 d7d6 f1e2 d8a5
FEN: rnb1k1nr/pp2ppbp/3p2p1/q1p5/2PPP3/5N2/PP2BPPP/RNBQK2R w KQkq –

ECO: B06
Opening Name: Modern Defense: Standard Defense
SAN: 1. e4 g6 2. d4 Bg7 3. Nc3 d6
UCI: e2e4 g7g6 d2d4 f8g7 b1c3 d7d6
FEN: rnbqk1nr/ppp1ppbp/3p2p1/8/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq –

ECO: B06
Opening Name: Modern Defense: Standard Line
SAN: 1. e4 g6 2. d4 Bg7 3. Nc3
UCI: e2e4 g7g6 d2d4 f8g7 b1c3
FEN: rnbqk1nr/ppppppbp/6p1/8/3PP3/2N5/PPP2PPP/R1BQKBNR b KQkq –

ECO: B06
Opening Name: Modern Defense: Three Pawns Attack
SAN: 1. e4 g6 2. d4 Bg7 3. f4
UCI: e2e4 g7g6 d2d4 f8g7 f2f4
FEN: rnbqk1nr/ppppppbp/6p1/8/3PPP2/8/PPP3PP/RNBQKBNR b KQkq –

ECO: B06
Opening Name: Modern Defense: Two Knights Variation
SAN: 1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. Nf3
UCI: e2e4 g7g6 d2d4 f8g7 b1c3 d7d6 g1f3
FEN: rnbqk1nr/ppp1ppbp/3p2p1/8/3PP3/2N2N2/PPP2PPP/R1BQKB1R b KQkq –

ECO: B06
Opening Name: Modern Defense: Two Knights Variation, Suttles Variation
SAN: 1. e4 g6 2. d4 Bg7 3. Nc3 c6 4. Nf3 d6
UCI: e2e4 g7g6 d2d4 f8g7 b1c3 c7c6 g1f3 d7d6
FEN: rnbqk1nr/pp2ppbp/2pp2p1/8/3PP3/2N2N2/PPP2PPP/R1BQKB1R w KQkq –

ECO: B06
Opening Name: Modern Defense: Two Knights Variation, Suttles Variation, Tal Gambit
SAN: 1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. Nf3 c6 5. Bg5 Qb6 6. Qd2 Qxb2
UCI: e2e4 g7g6 d2d4 f8g7 b1c3 d7d6 g1f3 c7c6 c1g5 d8b6 d1d2 b6b2
FEN: rnb1k1nr/pp2ppbp/2pp2p1/6B1/3PP3/2N2N2/PqPQ1PPP/R3KB1R w KQkq –

ECO: B06
Opening Name: Modern Defense: Westermann Gambit
SAN: 1. e4 g6 2. d4 Bg7 3. Bd2
UCI: e2e4 g7g6 d2d4 f8g7 c1d2
FEN: rnbqk1nr/ppppppbp/6p1/8/3PP3/8/PPPB1PPP/RN1QKBNR b KQkq –

ECO: B06
Opening Name: Modern Defense: Wind Gambit
SAN: 1. e4 g6 2. d4 Bg7 3. Bd3
UCI: e2e4 g7g6 d2d4 f8g7 f1d3
FEN: rnbqk1nr/ppppppbp/6p1/8/3PP3/3B4/PPP2PPP/RNBQK1NR b KQkq –

ECO: B06
Opening Name: Pterodactyl Defense: Austrian, Austriadactylus Western
SAN: 1. e4 g6 2. d4 Bg7 3. f4 c5 4. Nf3 Qa5+
UCI: e2e4 g7g6 d2d4 f8g7 f2f4 c7c5 g1f3 d8a5
FEN: rnb1k1nr/pp1pppbp/6p1/q1p5/3PPP2/5N2/PPP3PP/RNBQKB1R w KQkq –

ECO: B06
Opening Name: Pterodactyl Defense: Austrian, Grand Prix Pterodactyl
SAN: 1. e4 g6 2. Nc3 Bg7 3. f4 c5 4. Nf3 Qa5
UCI: e2e4 g7g6 b1c3 f8g7 f2f4 c7c5 g1f3 d8a5
FEN: rnb1k1nr/pp1pppbp/6p1/q1p5/4PP2/2N2N2/PPPP2PP/R1BQKB1R w KQkq –

ECO: B06
Opening Name: Pterodactyl Defense: Austrian, Pteranodon
SAN: 1. e4 g6 2. d4 Bg7 3. f4 c5 4. c3 Qa5
UCI: e2e4 g7g6 d2d4 f8g7 f2f4 c7c5 c2c3 d8a5
FEN: rnb1k1nr/pp1pppbp/6p1/q1p5/3PPP2/2P5/PP4PP/RNBQKBNR w KQkq –

ECO: B06
Opening Name: Pterodactyl Defense: Central, Anhanguera
SAN: 1. e4 g6 2. d4 Bg7 3. c4 c5 4. Nc3 d6 5. Be3 Qa5
UCI: e2e4 g7g6 d2d4 f8g7 c2c4 c7c5 b1c3 d7d6 c1e3 d8a5
FEN: rnb1k1nr/pp2ppbp/3p2p1/q1p5/2PPP3/2N1B3/PP3PPP/R2QKBNR w KQkq –

ECO: B06
Opening Name: Pterodactyl Defense: Central, Benoni Quetzalcoatlus
SAN: 1. e4 g6 2. d4 Bg7 3. c4 c5 4. d5 d6 5. Nc3 Qa5
UCI: e2e4 g7g6 d2d4 f8g7 c2c4 c7c5 d4d5 d7d6 b1c3 d8a5
FEN: rnb1k1nr/pp2ppbp/3p2p1/q1pP4/2P1P3/2N5/PP3PPP/R1BQKBNR w KQkq –

ECO: B06
Opening Name: Pterodactyl Defense: Central, Quetzalcoatlus Gambit
SAN: 1. e4 g6 2. d4 Bg7 3. c4 c5 4. Nc3 d6 5. dxc5 Qa5
UCI: e2e4 g7g6 d2d4 f8g7 c2c4 c7c5 b1c3 d7d6 d4c5 d8a5
FEN: rnb1k1nr/pp2ppbp/3p2p1/q1P5/2P1P3/2N5/PP3PPP/R1BQKBNR w KQkq –

ECO: B06
Opening Name: Pterodactyl Defense: Eastern, Anhanguera
SAN: 1. e4 g6 2. d4 Bg7 3. Nc3 c5 4. Be3
UCI: e2e4 g7g6 d2d4 f8g7 b1c3 c7c5 c1e3
FEN: rnbqk1nr/pp1pppbp/6p1/2p5/3PP3/2N1B3/PPP2PPP/R2QKBNR b KQkq –

ECO: B06
Opening Name: Pterodactyl Defense: Eastern, Benoni
SAN: 1. d4 g6 2. e4 Bg7 3. Nc3 c5 4. d5
UCI: d2d4 g7g6 e2e4 f8g7 b1c3 c7c5 d4d5
FEN: rnbqk1nr/pp1pppbp/6p1/2pP4/4P3/2N5/PPP2PPP/R1BQKBNR b KQkq –

ECO: B06
Opening Name: Pterodactyl Defense: Eastern, Benoni Pteranodon
SAN: 1. e4 g6 2. d4 Bg7 3. Nc3 c5 4. d5 Bxc3+ 5. bxc3 Qa5
UCI: e2e4 g7g6 d2d4 f8g7 b1c3 c7c5 d4d5 g7c3 b2c3 d8a5
FEN: rnb1k1nr/pp1ppp1p/6p1/q1pP4/4P3/2P5/P1P2PPP/R1BQKBNR w KQkq –

ECO: B06
Opening Name: Pterodactyl Defense: Eastern, Benoni Pterodactyl
SAN: 1. d4 g6 2. Nc3 Bg7 3. e4 c5 4. d5 Qa5
UCI: d2d4 g7g6 b1c3 f8g7 e2e4 c7c5 d4d5 d8a5
FEN: rnb1k1nr/pp1pppbp/6p1/q1pP4/4P3/2N5/PPP2PPP/R1BQKBNR w KQkq –

ECO: B06
Opening Name: Pterodactyl Defense: Eastern, Pteranodon
SAN: 1. e4 g6 2. d4 Bg7 3. Nc3 c5 4. dxc5 Bxc3+ 5. bxc3 Qa5
UCI: e2e4 g7g6 d2d4 f8g7 b1c3 c7c5 d4c5 g7c3 b2c3 d8a5
FEN: rnb1k1nr/pp1ppp1p/6p1/q1P5/4P3/2P5/P1P2PPP/R1BQKBNR w KQkq –

ECO: B06
Opening Name: Pterodactyl Defense: Eastern, Pterodactyl
SAN: 1. e4 g6 2. d4 Bg7 3. Nc3 c5 4. dxc5 Qa5
UCI: e2e4 g7g6 d2d4 f8g7 b1c3 c7c5 d4c5 d8a5
FEN: rnb1k1nr/pp1pppbp/6p1/q1P5/4P3/2N5/PPP2PPP/R1BQKBNR w KQkq –

ECO: B06
Opening Name: Pterodactyl Defense: Eastern, Rhamphorhynchus
SAN: 1. e4 g6 2. d4 Bg7 3. Nc3 c5 4. dxc5
UCI: e2e4 g7g6 d2d4 f8g7 b1c3 c7c5 d4c5
FEN: rnbqk1nr/pp1pppbp/6p1/2P5/4P3/2N5/PPP2PPP/R1BQKBNR b KQkq –

ECO: B06
Opening Name: Pterodactyl Defense: Fianchetto, King Pterodactyl
SAN: 1. e4 g6 2. d4 Bg7 3. g3 c5 4. Nf3 Qa5+
UCI: e2e4 g7g6 d2d4 f8g7 g2g3 c7c5 g1f3 d8a5
FEN: rnb1k1nr/pp1pppbp/6p1/q1p5/3PP3/5NP1/PPP2P1P/RNBQKB1R w KQkq –

ECO: B06
Opening Name: Pterodactyl Defense: Fianchetto, Rhamphorhynchus
SAN: 1. e4 g6 2. d4 Bg7 3. g3 c5 4. dxc5 Qa5+
UCI: e2e4 g7g6 d2d4 f8g7 g2g3 c7c5 d4c5 d8a5
FEN: rnb1k1nr/pp1pppbp/6p1/q1P5/4P3/6P1/PPP2P1P/RNBQKBNR w KQkq –

ECO: B06
Opening Name: Pterodactyl Defense: Sicilian, Quetzalcoatlus
SAN: 1. e4 g6 2. d4 Bg7 3. Nc3 c5 4. Nf3 Qa5 5. Be2 d6
UCI: e2e4 g7g6 d2d4 f8g7 b1c3 c7c5 g1f3 d8a5 f1e2 d7d6
FEN: rnb1k1nr/pp2ppbp/3p2p1/q1p5/3PP3/2N2N2/PPP1BPPP/R1BQK2R w KQkq –

ECO: B06
Opening Name: Pterodactyl Defense: Sicilian, Siroccopteryx
SAN: 1. e4 g6 2. d4 Bg7 3. Nc3 c5 4. Nf3 Qa5 5. Bc4
UCI: e2e4 g7g6 d2d4 f8g7 b1c3 c7c5 g1f3 d8a5 f1c4
FEN: rnb1k1nr/pp1pppbp/6p1/q1p5/2BPP3/2N2N2/PPP2PPP/R1BQK2R b KQkq –

ECO: B06
Opening Name: Pterodactyl Defense: Western, Anhanguera
SAN: 1. e4 g6 2. d4 Bg7 3. Nf3 c5 4. Be3 Qa5+
UCI: e2e4 g7g6 d2d4 f8g7 g1f3 c7c5 c1e3 d8a5
FEN: rnb1k1nr/pp1pppbp/6p1/q1p5/3PP3/4BN2/PPP2PPP/RN1QKB1R w KQkq –

ECO: B06
Opening Name: Pterodactyl Defense: Western, Siroccopteryx
SAN: 1. e4 g6 2. Nf3 Bg7 3. d4 c5 4. Bc4 cxd4 5. Nxd4 Qa5+
UCI: e2e4 g7g6 g1f3 f8g7 d2d4 c7c5 f1c4 c5d4 f3d4 d8a5
FEN: rnb1k1nr/pp1pppbp/6p1/q7/2BNP3/8/PPP2PPP/RNBQK2R w KQkq –

ECO: B06
Opening Name: Rat Defense: Accelerated Gurgenidze
SAN: 1. e4 g6 2. d4 d6 3. Nc3 c6
UCI: e2e4 g7g6 d2d4 d7d6 b1c3 c7c6
FEN: rnbqkbnr/pp2pp1p/2pp2p1/8/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq –

ECO: B07
Opening Name: Czech Defense
SAN: 1. e4 d6 2. d4 Nf6 3. Nc3 c6
UCI: e2e4 d7d6 d2d4 g8f6 b1c3 c7c6
FEN: rnbqkb1r/pp2pppp/2pp1n2/8/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq –

ECO: B07
Opening Name: King’s Pawn Game: Maróczy Defense
SAN: 1. e4 d6 2. d4 e5
UCI: e2e4 d7d6 d2d4 e7e5
FEN: rnbqkbnr/ppp2ppp/3p4/4p3/3PP3/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: B07
Opening Name: Lion Defense: Anti-Philidor
SAN: 1. e4 d6 2. d4 Nf6 3. Nc3 Nbd7 4. f4
UCI: e2e4 d7d6 d2d4 g8f6 b1c3 b8d7 f2f4
FEN: r1bqkb1r/pppnpppp/3p1n2/8/3PPP2/2N5/PPP3PP/R1BQKBNR b KQkq –

ECO: B07
Opening Name: Lion Defense: Anti-Philidor, Lion’s Cave
SAN: 1. e4 d6 2. d4 Nf6 3. Nc3 Nbd7 4. f4 e5
UCI: e2e4 d7d6 d2d4 g8f6 b1c3 b8d7 f2f4 e7e5
FEN: r1bqkb1r/pppn1ppp/3p1n2/4p3/3PPP2/2N5/PPP3PP/R1BQKBNR w KQkq –

ECO: B07
Opening Name: Lion Defense: Anti-Philidor, Lion’s Cave, Lion Claw Gambit
SAN: 1. e4 d6 2. d4 Nf6 3. Nc3 Nbd7 4. f4 e5 5. Nf3 exd4 6. Qxd4 c6 7. Bc4 d5
UCI: e2e4 d7d6 d2d4 g8f6 b1c3 b8d7 f2f4 e7e5 g1f3 e5d4 d1d4 c7c6 f1c4 d6d5
FEN: r1bqkb1r/pp1n1ppp/2p2n2/3p4/2BQPP2/2N2N2/PPP3PP/R1B1K2R w KQkq –

ECO: B07
Opening Name: Lion Defense: Bayonet Attack
SAN: 1. e4 d6 2. d4 Nf6 3. Nc3 Nbd7 4. g4
UCI: e2e4 d7d6 d2d4 g8f6 b1c3 b8d7 g2g4
FEN: r1bqkb1r/pppnpppp/3p1n2/8/3PP1P1/2N5/PPP2P1P/R1BQKBNR b KQkq –

ECO: B07
Opening Name: Modern Defense: Geller’s System
SAN: 1. e4 g6 2. d4 Bg7 3. Nf3 d6 4. c3
UCI: e2e4 g7g6 d2d4 f8g7 g1f3 d7d6 c2c3
FEN: rnbqk1nr/ppp1ppbp/3p2p1/8/3PP3/2P2N2/PP3PPP/RNBQKB1R b KQkq –

ECO: B07
Opening Name: Pirc Defense
SAN: 1. e4 d6 2. d4 Nf6 3. Nc3 g6
UCI: e2e4 d7d6 d2d4 g8f6 b1c3 g7g6
FEN: rnbqkb1r/ppp1pp1p/3p1np1/8/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq –

ECO: B07
Opening Name: Pirc Defense: 150 Attack
SAN: 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Be3 c6 5. Qd2
UCI: e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 c1e3 c7c6 d1d2
FEN: rnbqkb1r/pp2pp1p/2pp1np1/8/3PP3/2N1B3/PPPQ1PPP/R3KBNR b KQkq –

ECO: B07
Opening Name: Pirc Defense: 150 Attack, Inner Doll Defense
SAN: 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Be3 c6 5. Qd2 Bg4
UCI: e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 c1e3 c7c6 d1d2 c8g4
FEN: rn1qkb1r/pp2pp1p/2pp1np1/8/3PP1b1/2N1B3/PPPQ1PPP/R3KBNR w KQkq –

ECO: B07
Opening Name: Pirc Defense: 150 Attack, Sveshnikov-Jansa Attack
SAN: 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Be3 c6 5. h3
UCI: e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 c1e3 c7c6 h2h3
FEN: rnbqkb1r/pp2pp1p/2pp1np1/8/3PP3/2N1B2P/PPP2PP1/R2QKBNR b KQkq –

ECO: B07
Opening Name: Pirc Defense: Bayonet Attack
SAN: 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Be2 Bg7 5. h4
UCI: e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 f1e2 f8g7 h2h4
FEN: rnbqk2r/ppp1ppbp/3p1np1/8/3PP2P/2N5/PPP1BPP1/R1BQK1NR b KQkq –

ECO: B07
Opening Name: Pirc Defense: Byrne Variation
SAN: 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Bg5
UCI: e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 c1g5
FEN: rnbqkb1r/ppp1pp1p/3p1np1/6B1/3PP3/2N5/PPP2PPP/R2QKBNR b KQkq –

ECO: B07
Opening Name: Pirc Defense: Chinese Variation
SAN: 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Be2 Bg7 5. g4
UCI: e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 f1e2 f8g7 g2g4
FEN: rnbqk2r/ppp1ppbp/3p1np1/8/3PP1P1/2N5/PPP1BP1P/R1BQK1NR b KQkq –

ECO: B07
Opening Name: Pirc Defense: Kholmov System
SAN: 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Bc4
UCI: e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 f1c4
FEN: rnbqkb1r/ppp1pp1p/3p1np1/8/2BPP3/2N5/PPP2PPP/R1BQK1NR b KQkq –

ECO: B07
Opening Name: Pirc Defense: Sveshnikov System
SAN: 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. g3
UCI: e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 g2g3
FEN: rnbqkb1r/ppp1pp1p/3p1np1/8/3PP3/2N3P1/PPP2P1P/R1BQKBNR b KQkq –

ECO: B08
Opening Name: Pirc Defense: Classical Variation
SAN: 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Nf3
UCI: e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 g1f3
FEN: rnbqkb1r/ppp1pp1p/3p1np1/8/3PP3/2N2N2/PPP2PPP/R1BQKB1R b KQkq –

ECO: B08
Opening Name: Pirc Defense: Classical Variation
SAN: 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Nf3 Bg7
UCI: e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 g1f3 f8g7
FEN: rnbqk2r/ppp1ppbp/3p1np1/8/3PP3/2N2N2/PPP2PPP/R1BQKB1R w KQkq –

ECO: B08
Opening Name: Pirc Defense: Classical Variation, Quiet System
SAN: 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Nf3 Bg7 5. Be2
UCI: e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 g1f3 f8g7 f1e2
FEN: rnbqk2r/ppp1ppbp/3p1np1/8/3PP3/2N2N2/PPP1BPPP/R1BQK2R b KQkq –

ECO: B08
Opening Name: Pirc Defense: Classical Variation, Quiet System, Chigorin Line
SAN: 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Nf3 Bg7 5. Be2 O-O 6. O-O Nc6
UCI: e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 g1f3 f8g7 f1e2 e8g8 e1g1 b8c6
FEN: r1bq1rk1/ppp1ppbp/2np1np1/8/3PP3/2N2N2/PPP1BPPP/R1BQ1RK1 w – –

ECO: B08
Opening Name: Pirc Defense: Classical Variation, Quiet System, Czech Defense
SAN: 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Nf3 Bg7 5. Be2 O-O 6. O-O c6
UCI: e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 g1f3 f8g7 f1e2 e8g8 e1g1 c7c6
FEN: rnbq1rk1/pp2ppbp/2pp1np1/8/3PP3/2N2N2/PPP1BPPP/R1BQ1RK1 w – –

ECO: B08
Opening Name: Pirc Defense: Classical Variation, Quiet System, Parma Defense
SAN: 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Nf3 Bg7 5. Be2 O-O 6. O-O Bg4
UCI: e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 g1f3 f8g7 f1e2 e8g8 e1g1 c8g4
FEN: rn1q1rk1/ppp1ppbp/3p1np1/8/3PP1b1/2N2N2/PPP1BPPP/R1BQ1RK1 w – –

ECO: B08
Opening Name: Pirc Defense: Classical Variation, Schlechter Variation
SAN: 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Nf3 Bg7 5. h3
UCI: e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 g1f3 f8g7 h2h3
FEN: rnbqk2r/ppp1ppbp/3p1np1/8/3PP3/2N2N1P/PPP2PP1/R1BQKB1R b KQkq –

ECO: B09
Opening Name: Pirc Defense: Austrian Attack
SAN: 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4
UCI: e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 f2f4
FEN: rnbqkb1r/ppp1pp1p/3p1np1/8/3PPP2/2N5/PPP3PP/R1BQKBNR b KQkq –

ECO: B09
Opening Name: Pirc Defense: Austrian Attack
SAN: 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 O-O
UCI: e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 f2f4 f8g7 g1f3 e8g8
FEN: rnbq1rk1/ppp1ppbp/3p1np1/8/3PPP2/2N2N2/PPP3PP/R1BQKB1R w KQ –

ECO: B09
Opening Name: Pirc Defense: Austrian Attack, Dragon Formation
SAN: 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 c5
UCI: e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 f2f4 f8g7 g1f3 c7c5
FEN: rnbqk2r/pp2ppbp/3p1np1/2p5/3PPP2/2N2N2/PPP3PP/R1BQKB1R w KQkq –

ECO: B09
Opening Name: Pirc Defense: Austrian Attack, Kurajica Variation
SAN: 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 O-O 6. Be3
UCI: e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 f2f4 f8g7 g1f3 e8g8 c1e3
FEN: rnbq1rk1/ppp1ppbp/3p1np1/8/3PPP2/2N1BN2/PPP3PP/R2QKB1R b KQ –

ECO: B09
Opening Name: Pirc Defense: Austrian Attack, Ljubojevic Variation
SAN: 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Bc4
UCI: e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 f2f4 f8g7 f1c4
FEN: rnbqk2r/ppp1ppbp/3p1np1/8/2BPPP2/2N5/PPP3PP/R1BQK1NR b KQkq –

ECO: B09
Opening Name: Pirc Defense: Austrian Attack, Unzicker Attack
SAN: 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 O-O 6. e5
UCI: e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 f2f4 f8g7 g1f3 e8g8 e4e5
FEN: rnbq1rk1/ppp1ppbp/3p1np1/4P3/3P1P2/2N2N2/PPP3PP/R1BQKB1R b KQ –

ECO: B09
Opening Name: Pirc Defense: Austrian Attack, Unzicker Attack, Bronstein Variation
SAN: 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 O-O 6. e5 Nfd7 7. h4
UCI: e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 f2f4 f8g7 g1f3 e8g8 e4e5 f6d7 h2h4
FEN: rnbq1rk1/pppnppbp/3p2p1/4P3/3P1P1P/2N2N2/PPP3P1/R1BQKB1R b KQ –

ECO: B09
Opening Name: Pirc Defense: Austrian Attack, Weiss Variation
SAN: 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 O-O 6. Bd3
UCI: e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 f2f4 f8g7 g1f3 e8g8 f1d3
FEN: rnbq1rk1/ppp1ppbp/3p1np1/8/3PPP2/2NB1N2/PPP3PP/R1BQK2R b KQ –

ECO: B10
Opening Name: Caro-Kann Defense
SAN: 1. e4 c6
UCI: e2e4 c7c6
FEN: rnbqkbnr/pp1ppppp/2p5/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq –

ECO: B10
Opening Name: Caro-Kann Defense
SAN: 1. e4 c6 2. Nc3
UCI: e2e4 c7c6 b1c3
FEN: rnbqkbnr/pp1ppppp/2p5/8/4P3/2N5/PPPP1PPP/R1BQKBNR b KQkq –

ECO: B10
Opening Name: Caro-Kann Defense
SAN: 1. e4 c6 2. Nc3 d5
UCI: e2e4 c7c6 b1c3 d7d5
FEN: rnbqkbnr/pp2pppp/2p5/3p4/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq –

ECO: B10
Opening Name: Caro-Kann Defense: Accelerated Panov Attack
SAN: 1. e4 c6 2. c4
UCI: e2e4 c7c6 c2c4
FEN: rnbqkbnr/pp1ppppp/2p5/8/2P1P3/8/PP1P1PPP/RNBQKBNR b KQkq –

ECO: B10
Opening Name: Caro-Kann Defense: Accelerated Panov Attack
SAN: 1. e4 c6 2. c4 d5
UCI: e2e4 c7c6 c2c4 d7d5
FEN: rnbqkbnr/pp2pppp/2p5/3p4/2P1P3/8/PP1P1PPP/RNBQKBNR w KQkq –

ECO: B10
Opening Name: Caro-Kann Defense: Accelerated Panov Attack, Modern Variation
SAN: 1. e4 c6 2. c4 d5 3. exd5 cxd5 4. cxd5 Nf6
UCI: e2e4 c7c6 c2c4 d7d5 e4d5 c6d5 c4d5 g8f6
FEN: rnbqkb1r/pp2pppp/5n2/3P4/8/8/PP1P1PPP/RNBQKBNR w KQkq –

ECO: B10
Opening Name: Caro-Kann Defense: Accelerated Panov Attack, Open Variation
SAN: 1. e4 c6 2. c4 e5
UCI: e2e4 c7c6 c2c4 e7e5
FEN: rnbqkbnr/pp1p1ppp/2p5/4p3/2P1P3/8/PP1P1PPP/RNBQKBNR w KQkq –

ECO: B10
Opening Name: Caro-Kann Defense: Accelerated Panov Attack, Pseudo-Scandinavian
SAN: 1. e4 c6 2. c4 d5 3. exd5 Qxd5
UCI: e2e4 c7c6 c2c4 d7d5 e4d5 d8d5
FEN: rnb1kbnr/pp2pppp/2p5/3q4/2P5/8/PP1P1PPP/RNBQKBNR w KQkq –

ECO: B10
Opening Name: Caro-Kann Defense: Accelerated Panov Attack, Van Weersel Attack
SAN: 1. e4 c6 2. c4 d5 3. cxd5 cxd5 4. Qb3
UCI: e2e4 c7c6 c2c4 d7d5 c4d5 c6d5 d1b3
FEN: rnbqkbnr/pp2pppp/8/3p4/4P3/1Q6/PP1P1PPP/RNB1KBNR b KQkq –

ECO: B10
Opening Name: Caro-Kann Defense: Apocalypse Attack
SAN: 1. e4 c6 2. Nf3 d5 3. exd5 cxd5 4. Ne5
UCI: e2e4 c7c6 g1f3 d7d5 e4d5 c6d5 f3e5
FEN: rnbqkbnr/pp2pppp/8/3pN3/8/8/PPPP1PPP/RNBQKB1R b KQkq –

ECO: B10
Opening Name: Caro-Kann Defense: Breyer Variation
SAN: 1. e4 c6 2. d3
UCI: e2e4 c7c6 d2d3
FEN: rnbqkbnr/pp1ppppp/2p5/8/4P3/3P4/PPP2PPP/RNBQKBNR b KQkq –

ECO: B10
Opening Name: Caro-Kann Defense: Breyer Variation, Stein Attack
SAN: 1. e4 c6 2. d3 d5 3. Nd2 g6 4. Ngf3 Bg7 5. g3 e5 6. Bg2 Ne7 7. O-O O-O 8. b4
UCI: e2e4 c7c6 d2d3 d7d5 b1d2 g7g6 g1f3 f8g7 g2g3 e7e5 f1g2 g8e7 e1g1 e8g8 b2b4
FEN: rnbq1rk1/pp2npbp/2p3p1/3pp3/1P2P3/3P1NP1/P1PN1PBP/R1BQ1RK1 b – –

ECO: B10
Opening Name: Caro-Kann Defense: Endgame Offer
SAN: 1. e4 c6 2. Nf3 d5 3. d3
UCI: e2e4 c7c6 g1f3 d7d5 d2d3
FEN: rnbqkbnr/pp2pppp/2p5/3p4/4P3/3P1N2/PPP2PPP/RNBQKB1R b KQkq –

ECO: B10
Opening Name: Caro-Kann Defense: Endgame Variation
SAN: 1. e4 c6 2. Nf3 d5 3. d3 dxe4 4. dxe4 Qxd1+ 5. Kxd1
UCI: e2e4 c7c6 g1f3 d7d5 d2d3 d5e4 d3e4 d8d1 e1d1
FEN: rnb1kbnr/pp2pppp/2p5/8/4P3/5N2/PPP2PPP/RNBK1B1R b kq –

ECO: B10
Opening Name: Caro-Kann Defense: Euwe Attack
SAN: 1. e4 c6 2. b3
UCI: e2e4 c7c6 b2b3
FEN: rnbqkbnr/pp1ppppp/2p5/8/4P3/1P6/P1PP1PPP/RNBQKBNR b KQkq –

ECO: B10
Opening Name: Caro-Kann Defense: Goldman Variation
SAN: 1. e4 c6 2. Nc3 d5 3. Qf3
UCI: e2e4 c7c6 b1c3 d7d5 d1f3
FEN: rnbqkbnr/pp2pppp/2p5/3p4/4P3/2N2Q2/PPPP1PPP/R1B1KBNR b KQkq –

ECO: B10
Opening Name: Caro-Kann Defense: Hector Gambit
SAN: 1. e4 c6 2. Nc3 d5 3. Nf3 dxe4 4. Ng5
UCI: e2e4 c7c6 b1c3 d7d5 g1f3 d5e4 f3g5
FEN: rnbqkbnr/pp2pppp/2p5/6N1/4p3/2N5/PPPP1PPP/R1BQKB1R b KQkq –

ECO: B10
Opening Name: Caro-Kann Defense: Hillbilly Attack
SAN: 1. e4 c6 2. Bc4
UCI: e2e4 c7c6 f1c4
FEN: rnbqkbnr/pp1ppppp/2p5/8/2B1P3/8/PPPP1PPP/RNBQK1NR b KQkq –

ECO: B10
Opening Name: Caro-Kann Defense: Hillbilly Attack, Schaeffer Gambit
SAN: 1. e4 c6 2. Bc4 d5 3. Bb3 dxe4 4. Qh5
UCI: e2e4 c7c6 f1c4 d7d5 c4b3 d5e4 d1h5
FEN: rnbqkbnr/pp2pppp/2p5/7Q/4p3/1B6/PPPP1PPP/RNB1K1NR b KQkq –

ECO: B10
Opening Name: Caro-Kann Defense: Labahn Attack
SAN: 1. e4 c6 2. b4
UCI: e2e4 c7c6 b2b4
FEN: rnbqkbnr/pp1ppppp/2p5/8/1P2P3/8/P1PP1PPP/RNBQKBNR b KQkq –

ECO: B10
Opening Name: Caro-Kann Defense: Labahn Attack, Double Gambit
SAN: 1. e4 c6 2. b4 d5 3. b5
UCI: e2e4 c7c6 b2b4 d7d5 b4b5
FEN: rnbqkbnr/pp2pppp/2p5/1P1p4/4P3/8/P1PP1PPP/RNBQKBNR b KQkq –

ECO: B10
Opening Name: Caro-Kann Defense: Labahn Attack, Polish Variation
SAN: 1. e4 c6 2. b4 e5 3. Bb2
UCI: e2e4 c7c6 b2b4 e7e5 c1b2
FEN: rnbqkbnr/pp1p1ppp/2p5/4p3/1P2P3/8/PBPP1PPP/RN1QKBNR b KQkq –

ECO: B10
Opening Name: Caro-Kann Defense: Scorpion-Horus Gambit
SAN: 1. e4 c6 2. Nc3 d5 3. d3 dxe4 4. Bg5
UCI: e2e4 c7c6 b1c3 d7d5 d2d3 d5e4 c1g5
FEN: rnbqkbnr/pp2pppp/2p5/6B1/4p3/2NP4/PPP2PPP/R2QKBNR b KQkq –

ECO: B10
Opening Name: Caro-Kann Defense: Spike Variation
SAN: 1. e4 c6 2. g4
UCI: e2e4 c7c6 g2g4
FEN: rnbqkbnr/pp1ppppp/2p5/8/4P1P1/8/PPPP1P1P/RNBQKBNR b KQkq –

ECO: B10
Opening Name: Caro-Kann Defense: Spike Variation, Scorpion-Grob Gambit
SAN: 1. e4 c6 2. g4 d5 3. Nc3 dxe4 4. d3
UCI: e2e4 c7c6 g2g4 d7d5 b1c3 d5e4 d2d3
FEN: rnbqkbnr/pp2pppp/2p5/8/4p1P1/2NP4/PPP2P1P/R1BQKBNR b KQkq –

ECO: B10
Opening Name: Caro-Kann Defense: St. Patrick’s Attack
SAN: 1. e4 c6 2. Nc3 d5 3. h3
UCI: e2e4 c7c6 b1c3 d7d5 h2h3
FEN: rnbqkbnr/pp2pppp/2p5/3p4/4P3/2N4P/PPPP1PP1/R1BQKBNR b KQkq –

ECO: B10
Opening Name: Caro-Kann Defense: Toikkanen Gambit
SAN: 1. e4 c6 2. c4 d5 3. e5
UCI: e2e4 c7c6 c2c4 d7d5 e4e5
FEN: rnbqkbnr/pp2pppp/2p5/3pP3/2P5/8/PP1P1PPP/RNBQKBNR b KQkq –

ECO: B10
Opening Name: Caro-Kann Defense: Two Knights Attack
SAN: 1. e4 c6 2. Nc3 d5 3. Nf3
UCI: e2e4 c7c6 b1c3 d7d5 g1f3
FEN: rnbqkbnr/pp2pppp/2p5/3p4/4P3/2N2N2/PPPP1PPP/R1BQKB1R b KQkq –

ECO: B11
Opening Name: Caro-Kann Defense: Two Knights Attack, Mindeno Variation
SAN: 1. e4 c6 2. Nc3 d5 3. Nf3 Bg4
UCI: e2e4 c7c6 b1c3 d7d5 g1f3 c8g4
FEN: rn1qkbnr/pp2pppp/2p5/3p4/4P1b1/2N2N2/PPPP1PPP/R1BQKB1R w KQkq –

ECO: B11
Opening Name: Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Exchange Line
SAN: 1. e4 c6 2. Nc3 d5 3. Nf3 Bg4 4. h3 Bxf3
UCI: e2e4 c7c6 b1c3 d7d5 g1f3 c8g4 h2h3 g4f3
FEN: rn1qkbnr/pp2pppp/2p5/3p4/4P3/2N2b1P/PPPP1PP1/R1BQKB1R w KQkq –

ECO: B11
Opening Name: Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Retreat Line
SAN: 1. e4 c6 2. Nc3 d5 3. Nf3 Bg4 4. h3 Bh5
UCI: e2e4 c7c6 b1c3 d7d5 g1f3 c8g4 h2h3 g4h5
FEN: rn1qkbnr/pp2pppp/2p5/3p3b/4P3/2N2N1P/PPPP1PP1/R1BQKB1R w KQkq –

ECO: B12
Opening Name: Caro-Kann Defense
SAN: 1. e4 c6 2. d4
UCI: e2e4 c7c6 d2d4
FEN: rnbqkbnr/pp1ppppp/2p5/8/3PP3/8/PPP2PPP/RNBQKBNR b KQkq –

ECO: B12
Opening Name: Caro-Kann Defense
SAN: 1. e4 c6 2. d4 d5
UCI: e2e4 c7c6 d2d4 d7d5
FEN: rnbqkbnr/pp2pppp/2p5/3p4/3PP3/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: B12
Opening Name: Caro-Kann Defense: Advance Variation
SAN: 1. e4 c6 2. d4 d5 3. e5
UCI: e2e4 c7c6 d2d4 d7d5 e4e5
FEN: rnbqkbnr/pp2pppp/2p5/3pP3/3P4/8/PPP2PPP/RNBQKBNR b KQkq –

ECO: B12
Opening Name: Caro-Kann Defense: Advance Variation, Bayonet Attack
SAN: 1. e4 c6 2. d4 d5 3. e5 Bf5 4. g4
UCI: e2e4 c7c6 d2d4 d7d5 e4e5 c8f5 g2g4
FEN: rn1qkbnr/pp2pppp/2p5/3pPb2/3P2P1/8/PPP2P1P/RNBQKBNR b KQkq –

ECO: B12
Opening Name: Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense
SAN: 1. e4 c6 2. d4 d5 3. e5 c5
UCI: e2e4 c7c6 d2d4 d7d5 e4e5 c6c5
FEN: rnbqkbnr/pp2pppp/8/2ppP3/3P4/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: B12
Opening Name: Caro-Kann Defense: Advance Variation, Bronstein Variation
SAN: 1. e4 c6 2. d4 d5 3. e5 Bf5 4. Ne2
UCI: e2e4 c7c6 d2d4 d7d5 e4e5 c8f5 g1e2
FEN: rn1qkbnr/pp2pppp/2p5/3pPb2/3P4/8/PPP1NPPP/RNBQKB1R b KQkq –

ECO: B12
Opening Name: Caro-Kann Defense: Advance Variation, Prins Attack
SAN: 1. e4 c6 2. d4 d5 3. e5 Bf5 4. b4
UCI: e2e4 c7c6 d2d4 d7d5 e4e5 c8f5 b2b4
FEN: rn1qkbnr/pp2pppp/2p5/3pPb2/1P1P4/8/P1P2PPP/RNBQKBNR b KQkq –

ECO: B12
Opening Name: Caro-Kann Defense: Advance Variation, Short Variation
SAN: 1. e4 c6 2. d4 d5 3. e5 Bf5 4. Nf3
UCI: e2e4 c7c6 d2d4 d7d5 e4e5 c8f5 g1f3
FEN: rn1qkbnr/pp2pppp/2p5/3pPb2/3P4/5N2/PPP2PPP/RNBQKB1R b KQkq –

ECO: B12
Opening Name: Caro-Kann Defense: Advance Variation, Tal Variation
SAN: 1. e4 c6 2. d4 d5 3. e5 Bf5 4. h4
UCI: e2e4 c7c6 d2d4 d7d5 e4e5 c8f5 h2h4
FEN: rn1qkbnr/pp2pppp/2p5/3pPb2/3P3P/8/PPP2PP1/RNBQKBNR b KQkq –

ECO: B12
Opening Name: Caro-Kann Defense: Advance Variation, Van der Wiel Attack
SAN: 1. e4 c6 2. d4 d5 3. e5 Bf5 4. Nc3
UCI: e2e4 c7c6 d2d4 d7d5 e4e5 c8f5 b1c3
FEN: rn1qkbnr/pp2pppp/2p5/3pPb2/3P4/2N5/PPP2PPP/R1BQKBNR b KQkq –

ECO: B12
Opening Name: Caro-Kann Defense: Advance Variation, Van der Wiel Attack
SAN: 1. e4 c6 2. d4 d5 3. e5 Bf5 4. Nc3 e6 5. g4 Bg6 6. Nge2 c5 7. h4
UCI: e2e4 c7c6 d2d4 d7d5 e4e5 c8f5 b1c3 e7e6 g2g4 f5g6 g1e2 c6c5 h2h4
FEN: rn1qkbnr/pp3ppp/4p1b1/2ppP3/3P2PP/2N5/PPP1NP2/R1BQKB1R b KQkq –

ECO: B12
Opening Name: Caro-Kann Defense: Advance Variation, Van der Wiel Attack, Dreyev Defense
SAN: 1. e4 c6 2. d4 d5 3. e5 Bf5 4. Nc3 Qb6
UCI: e2e4 c7c6 d2d4 d7d5 e4e5 c8f5 b1c3 d8b6
FEN: rn2kbnr/pp2pppp/1qp5/3pPb2/3P4/2N5/PPP2PPP/R1BQKBNR w KQkq –

ECO: B12
Opening Name: Caro-Kann Defense: Advance, Short Variation
SAN: 1. e4 c6 2. d4 d5 3. e5 Bf5 4. c3 e6 5. Be2
UCI: e2e4 c7c6 d2d4 d7d5 e4e5 c8f5 c2c3 e7e6 f1e2
FEN: rn1qkbnr/pp3ppp/2p1p3/3pPb2/3P4/2P5/PP2BPPP/RNBQK1NR b KQkq –

ECO: B12
Opening Name: Caro-Kann Defense: De Bruycker Defense
SAN: 1. e4 c6 2. d4 Na6
UCI: e2e4 c7c6 d2d4 b8a6
FEN: r1bqkbnr/pp1ppppp/n1p5/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: B12
Opening Name: Caro-Kann Defense: De Bruycker Defense
SAN: 1. e4 c6 2. d4 Na6 3. Nc3 Nc7
UCI: e2e4 c7c6 d2d4 b8a6 b1c3 a6c7
FEN: r1bqkbnr/ppnppppp/2p5/8/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq –

ECO: B12
Opening Name: Caro-Kann Defense: Edinburgh Variation
SAN: 1. e4 c6 2. d4 d5 3. Nd2 Qb6
UCI: e2e4 c7c6 d2d4 d7d5 b1d2 d8b6
FEN: rnb1kbnr/pp2pppp/1qp5/3p4/3PP3/8/PPPN1PPP/R1BQKBNR w KQkq –

ECO: B12
Opening Name: Caro-Kann Defense: Maróczy Variation
SAN: 1. e4 c6 2. d4 d5 3. f3
UCI: e2e4 c7c6 d2d4 d7d5 f2f3
FEN: rnbqkbnr/pp2pppp/2p5/3p4/3PP3/5P2/PPP3PP/RNBQKBNR b KQkq –

ECO: B12
Opening Name: Caro-Kann Defense: Maróczy Variation, Maróczy Gambit
SAN: 1. e4 c6 2. d4 d5 3. f3 dxe4 4. fxe4 e5 5. Nf3 exd4 6. Bc4
UCI: e2e4 c7c6 d2d4 d7d5 f2f3 d5e4 f3e4 e7e5 g1f3 e5d4 f1c4
FEN: rnbqkbnr/pp3ppp/2p5/8/2BpP3/5N2/PPP3PP/RNBQK2R b KQkq –

ECO: B12
Opening Name: Caro-Kann Defense: Masi Variation
SAN: 1. e4 c6 2. d4 Nf6
UCI: e2e4 c7c6 d2d4 g8f6
FEN: rnbqkb1r/pp1ppppp/2p2n2/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: B12
Opening Name: Caro-Kann Defense: Massachusetts Defense
SAN: 1. e4 c6 2. d4 f5
UCI: e2e4 c7c6 d2d4 f7f5
FEN: rnbqkbnr/pp1pp1pp/2p5/5p2/3PP3/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: B12
Opening Name: Caro-Kann Defense: Mieses Attack, Landau Gambit
SAN: 1. e4 c6 2. d4 d5 3. Bd3 Nf6 4. e5 Nfd7 5. e6
UCI: e2e4 c7c6 d2d4 d7d5 f1d3 g8f6 e4e5 f6d7 e5e6
FEN: rnbqkb1r/pp1npppp/2p1P3/3p4/3P4/3B4/PPP2PPP/RNBQK1NR b KQkq –

ECO: B12
Opening Name: Caro-Kann Defense: Mieses Gambit
SAN: 1. e4 c6 2. d4 d5 3. Be3
UCI: e2e4 c7c6 d2d4 d7d5 c1e3
FEN: rnbqkbnr/pp2pppp/2p5/3p4/3PP3/4B3/PPP2PPP/RN1QKBNR b KQkq –

ECO: B12
Opening Name: Caro-Kann Defense: Modern Variation
SAN: 1. e4 c6 2. d4 d5 3. Nd2
UCI: e2e4 c7c6 d2d4 d7d5 b1d2
FEN: rnbqkbnr/pp2pppp/2p5/3p4/3PP3/8/PPPN1PPP/R1BQKBNR b KQkq –

ECO: B12
Opening Name: Caro-Kann Defense: Ulysses Gambit
SAN: 1. e4 c6 2. d4 d5 3. Nf3 dxe4 4. Ng5
UCI: e2e4 c7c6 d2d4 d7d5 g1f3 d5e4 f3g5
FEN: rnbqkbnr/pp2pppp/2p5/6N1/3Pp3/8/PPP2PPP/RNBQKB1R b KQkq –

ECO: B13
Opening Name: Caro-Kann Defense: Exchange Variation
SAN: 1. e4 c6 2. d4 d5 3. exd5
UCI: e2e4 c7c6 d2d4 d7d5 e4d5
FEN: rnbqkbnr/pp2pppp/2p5/3P4/3P4/8/PPP2PPP/RNBQKBNR b KQkq –

ECO: B13
Opening Name: Caro-Kann Defense: Exchange Variation
SAN: 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. Nf3 Nc6
UCI: e2e4 c7c6 d2d4 d7d5 e4d5 c6d5 g1f3 b8c6
FEN: r1bqkbnr/pp2pppp/2n5/3p4/3P4/5N2/PPP2PPP/RNBQKB1R w KQkq –

ECO: B13
Opening Name: Caro-Kann Defense: Exchange Variation, Bulla Attack
SAN: 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. g4
UCI: e2e4 c7c6 d2d4 d7d5 e4d5 c6d5 g2g4
FEN: rnbqkbnr/pp2pppp/8/3p4/3P2P1/8/PPP2P1P/RNBQKBNR b KQkq –

ECO: B13
Opening Name: Caro-Kann Defense: Exchange Variation, Rubinstein Variation
SAN: 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. Bd3 Nc6 5. c3 Nf6 6. Bf4
UCI: e2e4 c7c6 d2d4 d7d5 e4d5 c6d5 f1d3 b8c6 c2c3 g8f6 c1f4
FEN: r1bqkb1r/pp2pppp/2n2n2/3p4/3P1B2/2PB4/PP3PPP/RN1QK1NR b KQkq –

ECO: B13
Opening Name: Caro-Kann Defense: Panov Attack
SAN: 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4
UCI: e2e4 c7c6 d2d4 d7d5 e4d5 c6d5 c2c4
FEN: rnbqkbnr/pp2pppp/8/3p4/2PP4/8/PP3PPP/RNBQKBNR b KQkq –

ECO: B13
Opening Name: Caro-Kann Defense: Panov Attack
SAN: 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3
UCI: e2e4 c7c6 d2d4 d7d5 e4d5 c6d5 c2c4 g8f6 b1c3
FEN: rnbqkb1r/pp2pppp/5n2/3p4/2PP4/2N5/PP3PPP/R1BQKBNR b KQkq –

ECO: B13
Opening Name: Caro-Kann Defense: Panov Attack, Gunderam Attack
SAN: 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. c5
UCI: e2e4 c7c6 d2d4 d7d5 e4d5 c6d5 c2c4 g8f6 c4c5
FEN: rnbqkb1r/pp2pppp/5n2/2Pp4/3P4/8/PP3PPP/RNBQKBNR b KQkq –

ECO: B13
Opening Name: Caro-Kann Defense: Panov Attack, Modern Defense
SAN: 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 Nc6
UCI: e2e4 c7c6 d2d4 d7d5 e4d5 c6d5 c2c4 g8f6 b1c3 b8c6
FEN: r1bqkb1r/pp2pppp/2n2n2/3p4/2PP4/2N5/PP3PPP/R1BQKBNR w KQkq –

ECO: B13
Opening Name: Caro-Kann Defense: Panov Attack, Modern Defense, Carlsbad Line
SAN: 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 Nc6 6. Bg5 e6
UCI: e2e4 c7c6 d2d4 d7d5 e4d5 c6d5 c2c4 g8f6 b1c3 b8c6 c1g5 e7e6
FEN: r1bqkb1r/pp3ppp/2n1pn2/3p2B1/2PP4/2N5/PP3PPP/R2QKBNR w KQkq –

ECO: B13
Opening Name: Caro-Kann Defense: Panov Attack, Modern Defense, Czerniak Line
SAN: 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 Nc6 6. Bg5 Qa5
UCI: e2e4 c7c6 d2d4 d7d5 e4d5 c6d5 c2c4 g8f6 b1c3 b8c6 c1g5 d8a5
FEN: r1b1kb1r/pp2pppp/2n2n2/q2p2B1/2PP4/2N5/PP3PPP/R2QKBNR w KQkq –

ECO: B13
Opening Name: Caro-Kann Defense: Panov Attack, Modern Defense, Mieses Line
SAN: 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 Nc6 6. Nf3 Bg4
UCI: e2e4 c7c6 d2d4 d7d5 e4d5 c6d5 c2c4 g8f6 b1c3 b8c6 g1f3 c8g4
FEN: r2qkb1r/pp2pppp/2n2n2/3p4/2PP2b1/2N2N2/PP3PPP/R1BQKB1R w KQkq –

ECO: B13
Opening Name: Caro-Kann Defense: Panov Attack, Modern Defense, Reifir-Spielmann Line
SAN: 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 Nc6 6. Bg5 Qb6
UCI: e2e4 c7c6 d2d4 d7d5 e4d5 c6d5 c2c4 g8f6 b1c3 b8c6 c1g5 d8b6
FEN: r1b1kb1r/pp2pppp/1qn2n2/3p2B1/2PP4/2N5/PP3PPP/R2QKBNR w KQkq –

ECO: B13
Opening Name: Caro-Kann Defense: Panov-Botvinnik, Herzog Defense
SAN: 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 Nc6 6. Bg5 dxc4 7. d5 Na5
UCI: e2e4 c7c6 d2d4 d7d5 e4d5 c6d5 c2c4 g8f6 b1c3 b8c6 c1g5 d5c4 d4d5 c6a5
FEN: r1bqkb1r/pp2pppp/5n2/n2P2B1/2p5/2N5/PP3PPP/R2QKBNR w KQkq –

ECO: B14
Opening Name: Caro-Kann Defense: Panov Attack
SAN: 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 e6
UCI: e2e4 c7c6 d2d4 d7d5 e4d5 c6d5 c2c4 g8f6 b1c3 e7e6
FEN: rnbqkb1r/pp3ppp/4pn2/3p4/2PP4/2N5/PP3PPP/R1BQKBNR w KQkq –

ECO: B14
Opening Name: Caro-Kann Defense: Panov Attack, Fianchetto Defense
SAN: 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 g6
UCI: e2e4 c7c6 d2d4 d7d5 e4d5 c6d5 c2c4 g8f6 b1c3 g7g6
FEN: rnbqkb1r/pp2pp1p/5np1/3p4/2PP4/2N5/PP3PPP/R1BQKBNR w KQkq –

ECO: B14
Opening Name: Caro-Kann Defense: Panov Attack, Fianchetto Defense, Fianchetto Gambit
SAN: 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 g6 6. cxd5 Bg7
UCI: e2e4 c7c6 d2d4 d7d5 e4d5 c6d5 c2c4 g8f6 b1c3 g7g6 c4d5 f8g7
FEN: rnbqk2r/pp2ppbp/5np1/3P4/3P4/2N5/PP3PPP/R1BQKBNR w KQkq –

ECO: B14
Opening Name: Caro-Kann Defense: Panov Attack, Main Line
SAN: 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 e6 6. Nf3 Bb4
UCI: e2e4 c7c6 d2d4 d7d5 e4d5 c6d5 c2c4 g8f6 b1c3 e7e6 g1f3 f8b4
FEN: rnbqk2r/pp3ppp/4pn2/3p4/1bPP4/2N2N2/PP3PPP/R1BQKB1R w KQkq –

ECO: B15
Opening Name: Caro-Kann Defense
SAN: 1. e4 c6 2. d4 d5 3. Nc3
UCI: e2e4 c7c6 d2d4 d7d5 b1c3
FEN: rnbqkbnr/pp2pppp/2p5/3p4/3PP3/2N5/PPP2PPP/R1BQKBNR b KQkq –

ECO: B15
Opening Name: Caro-Kann Defense
SAN: 1. e4 c6 2. d4 d5 3. Nc3 dxe4
UCI: e2e4 c7c6 d2d4 d7d5 b1c3 d5e4
FEN: rnbqkbnr/pp2pppp/2p5/8/3Pp3/2N5/PPP2PPP/R1BQKBNR w KQkq –

ECO: B15
Opening Name: Caro-Kann Defense: Alekhine Gambit
SAN: 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Bd3
UCI: e2e4 c7c6 d2d4 d7d5 b1c3 d5e4 c3e4 g8f6 f1d3
FEN: rnbqkb1r/pp2pppp/2p2n2/8/3PN3/3B4/PPP2PPP/R1BQK1NR b KQkq –

ECO: B15
Opening Name: Caro-Kann Defense: Alien Gambit
SAN: 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Ng5 h6 6. Nxf7
UCI: e2e4 c7c6 d2d4 d7d5 b1c3 d5e4 c3e4 g8f6 e4g5 h7h6 g5f7
FEN: rnbqkb1r/pp2pNp1/2p2n1p/8/3P4/8/PPP2PPP/R1BQKBNR b KQkq –

ECO: B15
Opening Name: Caro-Kann Defense: Campomanes Attack
SAN: 1. e4 c6 2. d4 d5 3. Nc3 Nf6
UCI: e2e4 c7c6 d2d4 d7d5 b1c3 g8f6
FEN: rnbqkb1r/pp2pppp/2p2n2/3p4/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq –

ECO: B15
Opening Name: Caro-Kann Defense: Forgacs Variation
SAN: 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Nxf6+ exf6 6. Bc4
UCI: e2e4 c7c6 d2d4 d7d5 b1c3 d5e4 c3e4 g8f6 e4f6 e7f6 f1c4
FEN: rnbqkb1r/pp3ppp/2p2p2/8/2BP4/8/PPP2PPP/R1BQK1NR b KQkq –

ECO: B15
Opening Name: Caro-Kann Defense: Gurgenidze Counterattack
SAN: 1. e4 c6 2. d4 d5 3. Nc3 b5
UCI: e2e4 c7c6 d2d4 d7d5 b1c3 b7b5
FEN: rnbqkbnr/p3pppp/2p5/1p1p4/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq –

ECO: B15
Opening Name: Caro-Kann Defense: Gurgenidze System
SAN: 1. e4 c6 2. d4 d5 3. Nc3 g6
UCI: e2e4 c7c6 d2d4 d7d5 b1c3 g7g6
FEN: rnbqkbnr/pp2pp1p/2p3p1/3p4/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq –

ECO: B15
Opening Name: Caro-Kann Defense: Main Line
SAN: 1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4
UCI: e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4
FEN: rnbqkbnr/pp2pppp/2p5/8/3PN3/8/PPP2PPP/R1BQKBNR b KQkq –

ECO: B15
Opening Name: Caro-Kann Defense: Rasa-Studier Gambit
SAN: 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. f3
UCI: e2e4 c7c6 d2d4 d7d5 b1c3 d5e4 f2f3
FEN: rnbqkbnr/pp2pppp/2p5/8/3Pp3/2N2P2/PPP3PP/R1BQKBNR b KQkq –

ECO: B15
Opening Name: Caro-Kann Defense: Tartakower Variation
SAN: 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Nxf6+ exf6
UCI: e2e4 c7c6 d2d4 d7d5 b1c3 d5e4 c3e4 g8f6 e4f6 e7f6
FEN: rnbqkb1r/pp3ppp/2p2p2/8/3P4/8/PPP2PPP/R1BQKBNR w KQkq –

ECO: B15
Opening Name: Caro-Kann Defense: von Hennig Gambit
SAN: 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Bc4
UCI: e2e4 c7c6 d2d4 d7d5 b1c3 d5e4 f1c4
FEN: rnbqkbnr/pp2pppp/2p5/8/2BPp3/2N5/PPP2PPP/R1BQK1NR b KQkq –

ECO: B16
Opening Name: Caro-Kann Defense: Bronstein-Larsen Variation
SAN: 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Nxf6+ gxf6
UCI: e2e4 c7c6 d2d4 d7d5 b1c3 d5e4 c3e4 g8f6 e4f6 g7f6
FEN: rnbqkb1r/pp2pp1p/2p2p2/8/3P4/8/PPP2PPP/R1BQKBNR w KQkq –

ECO: B16
Opening Name: Caro-Kann Defense: Finnish Variation
SAN: 1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 h6
UCI: e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 h7h6
FEN: rnbqkbnr/pp2ppp1/2p4p/8/3PN3/8/PPP2PPP/R1BQKBNR w KQkq –

ECO: B17
Opening Name: Caro-Kann Defense: Karpov Variation
SAN: 1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nd7
UCI: e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 b8d7
FEN: r1bqkbnr/pp1npppp/2p5/8/3PN3/8/PPP2PPP/R1BQKBNR w KQkq –

ECO: B17
Opening Name: Caro-Kann Defense: Karpov Variation, Modern Main Line
SAN: 1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nd7 5. Ng5 Ngf6 6. Bd3 e6 7. N1f3 Bd6 8. Qe2 h6 9. Ne4 Nxe4 10. Qxe4
UCI: e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 b8d7 e4g5 g8f6 f1d3 e7e6 g1f3 f8d6 d1e2 h7h6 g5e4 f6e4 e2e4
FEN: r1bqk2r/pp1n1pp1/2pbp2p/8/3PQ3/3B1N2/PPP2PPP/R1B1K2R b KQkq –

ECO: B17
Opening Name: Caro-Kann Defense: Karpov Variation, Modern Variation
SAN: 1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nd7 5. Ng5
UCI: e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 b8d7 e4g5
FEN: r1bqkbnr/pp1npppp/2p5/6N1/3P4/8/PPP2PPP/R1BQKBNR b KQkq –

ECO: B17
Opening Name: Caro-Kann Defense: Karpov Variation, Modern Variation, Ivanchuk Defense
SAN: 1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nd7 5. Ng5 Ndf6
UCI: e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 b8d7 e4g5 d7f6
FEN: r1bqkbnr/pp2pppp/2p2n2/6N1/3P4/8/PPP2PPP/R1BQKBNR w KQkq –

ECO: B17
Opening Name: Caro-Kann Defense: Karpov Variation, Modern Variation, Kasparov Attack
SAN: 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nd7 5. Nf3 Ngf6 6. Ng3
UCI: e2e4 c7c6 d2d4 d7d5 b1c3 d5e4 c3e4 b8d7 g1f3 g8f6 e4g3
FEN: r1bqkb1r/pp1npppp/2p2n2/8/3P4/5NN1/PPP2PPP/R1BQKB1R b KQkq –

ECO: B17
Opening Name: Caro-Kann Defense: Karpov Variation, Smyslov Variation
SAN: 1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nd7 5. Bc4 Ngf6 6. Ng5 e6 7. Qe2 Nb6
UCI: e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 b8d7 f1c4 g8f6 e4g5 e7e6 d1e2 d7b6
FEN: r1bqkb1r/pp3ppp/1np1pn2/6N1/2BP4/8/PPP1QPPP/R1B1K1NR w KQkq –

ECO: B17
Opening Name: Caro-Kann Defense: Karpov Variation, Smyslov Variation, Main Line
SAN: 1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nd7 5. Bc4 Ngf6 6. Ng5 e6 7. Qe2 Nb6 8. Bb3
UCI: e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 b8d7 f1c4 g8f6 e4g5 e7e6 d1e2 d7b6 c4b3
FEN: r1bqkb1r/pp3ppp/1np1pn2/6N1/3P4/1B6/PPP1QPPP/R1B1K1NR b KQkq –

ECO: B17
Opening Name: Caro-Kann Defense: Karpov Variation, Tiviakov-Fischer Attack
SAN: 1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nd7 5. Bc4 Ngf6 6. Nxf6+ Nxf6
UCI: e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 b8d7 f1c4 g8f6 e4f6 d7f6
FEN: r1bqkb1r/pp2pppp/2p2n2/8/2BP4/8/PPP2PPP/R1BQK1NR w KQkq –

ECO: B18
Opening Name: Caro-Kann Defense: Classical Variation
SAN: 1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Bf5
UCI: e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 c8f5
FEN: rn1qkbnr/pp2pppp/2p5/5b2/3PN3/8/PPP2PPP/R1BQKBNR w KQkq –

ECO: B18
Opening Name: Caro-Kann Defense: Classical Variation, Flohr Variation
SAN: 1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. Nh3
UCI: e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 c8f5 e4g3 f5g6 g1h3
FEN: rn1qkbnr/pp2pppp/2p3b1/8/3P4/6NN/PPP2PPP/R1BQKB1R b KQkq –

ECO: B18
Opening Name: Caro-Kann Defense: Classical Variation, Main Line
SAN: 1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4
UCI: e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 c8f5 e4g3 f5g6 h2h4
FEN: rn1qkbnr/pp2pppp/2p3b1/8/3P3P/6N1/PPP2PP1/R1BQKBNR b KQkq –

ECO: B18
Opening Name: Caro-Kann Defense: Classical Variation, Maróczy Attack
SAN: 1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. f4
UCI: e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 c8f5 e4g3 f5g6 f2f4
FEN: rn1qkbnr/pp2pppp/2p3b1/8/3P1P2/6N1/PPP3PP/R1BQKBNR b KQkq –

ECO: B18
Opening Name: Caro-Kann Defense: Martian Gambit
SAN: 1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Bf5 5. Ng5 Bg6 6. N1f3 h6 7. Ne6
UCI: e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 c8f5 e4g5 f5g6 g1f3 h7h6 g5e6
FEN: rn1qkbnr/pp2ppp1/2p1N1bp/8/3P4/5N2/PPP2PPP/R1BQKB1R b KQkq –

ECO: B19
Opening Name: Caro-Kann Defense: Classical Variation
SAN: 1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. Nf3 Nd7
UCI: e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 c8f5 e4g3 f5g6 h2h4 h7h6 g1f3 b8d7
FEN: r2qkbnr/pp1nppp1/2p3bp/8/3P3P/5NN1/PPP2PP1/R1BQKB1R w KQkq –

ECO: B19
Opening Name: Caro-Kann Defense: Classical Variation, Lobron System
SAN: 1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. Nf3 Nd7 8. h5 Bh7 9. Bd3 Bxd3 10. Qxd3 e6 11. Bd2 Ngf6 12. O-O-O Be7
UCI: e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 c8f5 e4g3 f5g6 h2h4 h7h6 g1f3 b8d7 h4h5 g6h7 f1d3 h7d3 d1d3 e7e6 c1d2 g8f6 e1c1 f8e7
FEN: r2qk2r/pp1nbpp1/2p1pn1p/7P/3P4/3Q1NN1/PPPB1PP1/2KR3R w kq –

ECO: B19
Opening Name: Caro-Kann Defense: Classical Variation, Seirawan Variation
SAN: 1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. Nf3 Nd7 8. h5 Bh7 9. Bd3 Bxd3 10. Qxd3 Ngf6 11. Bd2 e6 12. O-O-O Bd6
UCI: e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 c8f5 e4g3 f5g6 h2h4 h7h6 g1f3 b8d7 h4h5 g6h7 f1d3 h7d3 d1d3 g8f6 c1d2 e7e6 e1c1 f8d6
FEN: r2qk2r/pp1n1pp1/2pbpn1p/7P/3P4/3Q1NN1/PPPB1PP1/2KR3R w kq –

ECO: B19
Opening Name: Caro-Kann Defense: Classical Variation, Spassky Variation
SAN: 1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. Nf3 Nd7 8. h5
UCI: e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 c8f5 e4g3 f5g6 h2h4 h7h6 g1f3 b8d7 h4h5
FEN: r2qkbnr/pp1nppp1/2p3bp/7P/3P4/5NN1/PPP2PP1/R1BQKB1R b KQkq –

ECO: B20
Opening Name: Sicilian Defense
SAN: 1. e4 c5
UCI: e2e4 c7c5
FEN: rnbqkbnr/pp1ppppp/8/2p5/4P3/8/PPPP1PPP/RNBQKBNR w KQkq –

ECO: B20
Opening Name: Sicilian Defense: Amazon Attack
SAN: 1. e4 c5 2. Qg4
UCI: e2e4 c7c5 d1g4
FEN: rnbqkbnr/pp1ppppp/8/2p5/4P1Q1/8/PPPP1PPP/RNB1KBNR b KQkq –

ECO: B20
Opening Name: Sicilian Defense: Big Clamp Formation
SAN: 1. e4 c5 2. d3 Nc6 3. c3 d6 4. f4
UCI: e2e4 c7c5 d2d3 b8c6 c2c3 d7d6 f2f4
FEN: r1bqkbnr/pp2pppp/2np4/2p5/4PP2/2PP4/PP4PP/RNBQKBNR b KQkq –

ECO: B20
Opening Name: Sicilian Defense: Bowdler Attack
SAN: 1. e4 c5 2. Bc4
UCI: e2e4 c7c5 f1c4
FEN: rnbqkbnr/pp1ppppp/8/2p5/2B1P3/8/PPPP1PPP/RNBQK1NR b KQkq –

ECO: B20
Opening Name: Sicilian Defense: Brick Variation
SAN: 1. e4 c5 2. Nh3
UCI: e2e4 c7c5 g1h3
FEN: rnbqkbnr/pp1ppppp/8/2p5/4P3/7N/PPPP1PPP/RNBQKB1R b KQkq –

ECO: B20
Opening Name: Sicilian Defense: Euwe Attack, Prins Gambit
SAN: 1. e4 c5 2. b3 d5 3. Bb2
UCI: e2e4 c7c5 b2b3 d7d5 c1b2
FEN: rnbqkbnr/pp2pppp/8/2pp4/4P3/1P6/PBPP1PPP/RN1QKBNR b KQkq –

ECO: B20
Opening Name: Sicilian Defense: Gloria Variation
SAN: 1. e4 c5 2. c4 d6 3. Nc3 Nc6 4. g3 h5
UCI: e2e4 c7c5 c2c4 d7d6 b1c3 b8c6 g2g3 h7h5
FEN: r1bqkbnr/pp2ppp1/2np4/2p4p/2P1P3/2N3P1/PP1P1P1P/R1BQKBNR w KQkq –

ECO: B20
Opening Name: Sicilian Defense: Grob Variation
SAN: 1. e4 c5 2. g4
UCI: e2e4 c7c5 g2g4
FEN: rnbqkbnr/pp1ppppp/8/2p5/4P1P1/8/PPPP1P1P/RNBQKBNR b KQkq –

ECO: B20
Opening Name: Sicilian Defense: Keres Variation
SAN: 1. e4 c5 2. Ne2
UCI: e2e4 c7c5 g1e2
FEN: rnbqkbnr/pp1ppppp/8/2p5/4P3/8/PPPPNPPP/RNBQKB1R b KQkq –

ECO: B20
Opening Name: Sicilian Defense: King David’s Opening
SAN: 1. e4 c5 2. Ke2
UCI: e2e4 c7c5 e1e2
FEN: rnbqkbnr/pp1ppppp/8/2p5/4P3/8/PPPPKPPP/RNBQ1BNR b kq –

ECO: B20
Opening Name: Sicilian Defense: Kronberger Variation
SAN: 1. e4 c5 2. Na3
UCI: e2e4 c7c5 b1a3
FEN: rnbqkbnr/pp1ppppp/8/2p5/4P3/N7/PPPP1PPP/R1BQKBNR b KQkq –

ECO: B20
Opening Name: Sicilian Defense: Kronberger Variation, Nemeth Gambit
SAN: 1. e4 c5 2. Na3 Nc6 3. d4 cxd4 4. Bc4
UCI: e2e4 c7c5 b1a3 b8c6 d2d4 c5d4 f1c4
FEN: r1bqkbnr/pp1ppppp/2n5/8/2BpP3/N7/PPP2PPP/R1BQK1NR b KQkq –

ECO: B20
Opening Name: Sicilian Defense: Lasker-Dunne Attack
SAN: 1. e4 c5 2. g3
UCI: e2e4 c7c5 g2g3
FEN: rnbqkbnr/pp1ppppp/8/2p5/4P3/6P1/PPPP1P1P/RNBQKBNR b KQkq –

ECO: B20
Opening Name: Sicilian Defense: Mengarini Variation
SAN: 1. e4 c5 2. a3
UCI: e2e4 c7c5 a2a3
FEN: rnbqkbnr/pp1ppppp/8/2p5/4P3/P7/1PPP1PPP/RNBQKBNR b KQkq –

ECO: B20
Opening Name: Sicilian Defense: Myers Attack, with a4
SAN: 1. e4 c5 2. a4
UCI: e2e4 c7c5 a2a4
FEN: rnbqkbnr/pp1ppppp/8/2p5/P3P3/8/1PPP1PPP/RNBQKBNR b KQkq –

ECO: B20
Opening Name: Sicilian Defense: Myers Attack, with h4
SAN: 1. e4 c5 2. h4
UCI: e2e4 c7c5 h2h4
FEN: rnbqkbnr/pp1ppppp/8/2p5/4P2P/8/PPPP1PP1/RNBQKBNR b KQkq –

ECO: B20
Opening Name: Sicilian Defense: Snyder Variation
SAN: 1. e4 c5 2. b3
UCI: e2e4 c7c5 b2b3
FEN: rnbqkbnr/pp1ppppp/8/2p5/4P3/1P6/P1PP1PPP/RNBQKBNR b KQkq –

ECO: B20
Opening Name: Sicilian Defense: Snyder Variation, Queen Fianchetto Variation
SAN: 1. e4 c5 2. b3 b6
UCI: e2e4 c7c5 b2b3 b7b6
FEN: rnbqkbnr/p2ppppp/1p6/2p5/4P3/1P6/P1PP1PPP/RNBQKBNR w KQkq –

ECO: B20
Opening Name: Sicilian Defense: Staunton-Cochrane Variation
SAN: 1. e4 c5 2. c4
UCI: e2e4 c7c5 c2c4
FEN: rnbqkbnr/pp1ppppp/8/2p5/2P1P3/8/PP1P1PPP/RNBQKBNR b KQkq –

ECO: B20
Opening Name: Sicilian Defense: Wing Gambit
SAN: 1. e4 c5 2. b4
UCI: e2e4 c7c5 b2b4
FEN: rnbqkbnr/pp1ppppp/8/2p5/1P2P3/8/P1PP1PPP/RNBQKBNR b KQkq –

ECO: B20
Opening Name: Sicilian Defense: Wing Gambit, Abrahams Variation
SAN: 1. e4 c5 2. b4 cxb4 3. Bb2
UCI: e2e4 c7c5 b2b4 c5b4 c1b2
FEN: rnbqkbnr/pp1ppppp/8/8/1p2P3/8/PBPP1PPP/RN1QKBNR b KQkq –

ECO: B20
Opening Name: Sicilian Defense: Wing Gambit, Carlsbad Variation
SAN: 1. e4 c5 2. b4 cxb4 3. a3 bxa3
UCI: e2e4 c7c5 b2b4 c5b4 a2a3 b4a3
FEN: rnbqkbnr/pp1ppppp/8/8/4P3/p7/2PP1PPP/RNBQKBNR w KQkq –

ECO: B20
Opening Name: Sicilian Defense: Wing Gambit, Marienbad Variation
SAN: 1. e4 c5 2. b4 cxb4 3. a3 d5 4. exd5 Qxd5 5. Bb2
UCI: e2e4 c7c5 b2b4 c5b4 a2a3 d7d5 e4d5 d8d5 c1b2
FEN: rnb1kbnr/pp2pppp/8/3q4/1p6/P7/1BPP1PPP/RN1QKBNR b KQkq –

ECO: B20
Opening Name: Sicilian Defense: Wing Gambit, Marshall Variation
SAN: 1. e4 c5 2. b4 cxb4 3. a3
UCI: e2e4 c7c5 b2b4 c5b4 a2a3
FEN: rnbqkbnr/pp1ppppp/8/8/1p2P3/P7/2PP1PPP/RNBQKBNR b KQkq –

ECO: B20
Opening Name: Sicilian Defense: Wing Gambit, Nanu Gambit
SAN: 1. e4 c5 2. b4 cxb4 3. a3 d5 4. exd5 Qxd5 5. Nf3 e5 6. c4 Qe6 7. Bd3
UCI: e2e4 c7c5 b2b4 c5b4 a2a3 d7d5 e4d5 d8d5 g1f3 e7e5 c2c4 d5e6 f1d3
FEN: rnb1kbnr/pp3ppp/4q3/4p3/1pP5/P2B1N2/3P1PPP/RNBQK2R b KQkq –

ECO: B20
Opening Name: Sicilian Defense: Wing Gambit, Romanian Defense
SAN: 1. e4 c5 2. b4 cxb4 3. a3 d5 4. exd5 Qxd5 5. Nf3 e5 6. Bb2 Nc6 7. c4 Qe6
UCI: e2e4 c7c5 b2b4 c5b4 a2a3 d7d5 e4d5 d8d5 g1f3 e7e5 c1b2 b8c6 c2c4 d5e6
FEN: r1b1kbnr/pp3ppp/2n1q3/4p3/1pP5/P4N2/1B1P1PPP/RN1QKB1R w KQkq –

ECO: B20
Opening Name: Sicilian Defense: Wing Gambit, Santasiere Variation
SAN: 1. e4 c5 2. b4 cxb4 3. c4
UCI: e2e4 c7c5 b2b4 c5b4 c2c4
FEN: rnbqkbnr/pp1ppppp/8/8/1pP1P3/8/P2P1PPP/RNBQKBNR b KQkq c3

ECO: B21
Opening Name: Bird Opening: Dutch Variation, Batavo Gambit
SAN: 1. e4 c5 2. f4 d5 3. Nf3 dxe4
UCI: e2e4 c7c5 f2f4 d7d5 g1f3 d5e4
FEN: rnbqkbnr/pp2pppp/8/2p5/4pP2/5N2/PPPP2PP/RNBQKB1R w KQkq –

ECO: B21
Opening Name: Sicilian Defense: Coles Sicilian Gambit
SAN: 1. e4 c5 2. d4 cxd4 3. Qxd4 Nc6 4. Qd1 Nf6 5. Bc4
UCI: e2e4 c7c5 d2d4 c5d4 d1d4 b8c6 d4d1 g8f6 f1c4
FEN: r1bqkb1r/pp1ppppp/2n2n2/8/2B1P3/8/PPP2PPP/RNBQK1NR b KQkq –

ECO: B21
Opening Name: Sicilian Defense: Halasz Gambit
SAN: 1. e4 c5 2. d4 cxd4 3. f4
UCI: e2e4 c7c5 d2d4 c5d4 f2f4
FEN: rnbqkbnr/pp1ppppp/8/8/3pPP2/8/PPP3PP/RNBQKBNR b KQkq –

ECO: B21
Opening Name: Sicilian Defense: McDonnell Attack
SAN: 1. e4 c5 2. f4
UCI: e2e4 c7c5 f2f4
FEN: rnbqkbnr/pp1ppppp/8/2p5/4PP2/8/PPPP2PP/RNBQKBNR b KQkq –

ECO: B21
Opening Name: Sicilian Defense: McDonnell Attack, Tal Gambit
SAN: 1. e4 c5 2. f4 d5 3. exd5 Nf6
UCI: e2e4 c7c5 f2f4 d7d5 e4d5 g8f6
FEN: rnbqkb1r/pp2pppp/5n2/2pP4/5P2/8/PPPP2PP/RNBQKBNR w KQkq –

ECO: B21
Opening Name: Sicilian Defense: Morphy Gambit
SAN: 1. e4 c5 2. d4 cxd4 3. Nf3
UCI: e2e4 c7c5 d2d4 c5d4 g1f3
FEN: rnbqkbnr/pp1ppppp/8/8/3pP3/5N2/PPP2PPP/RNBQKB1R b KQkq –

ECO: B21
Opening Name: Sicilian Defense: Morphy Gambit, Andreaschek Gambit
SAN: 1. e4 c5 2. d4 cxd4 3. Nf3 e5 4. c3
UCI: e2e4 c7c5 d2d4 c5d4 g1f3 e7e5 c2c3
FEN: rnbqkbnr/pp1p1ppp/8/4p3/3pP3/2P2N2/PP3PPP/RNBQKB1R b KQkq –

ECO: B21
Opening Name: Sicilian Defense: Smith-Morra Gambit
SAN: 1. e4 c5 2. d4
UCI: e2e4 c7c5 d2d4
FEN: rnbqkbnr/pp1ppppp/8/2p5/3PP3/8/PPP2PPP/RNBQKBNR b KQkq –

ECO: B21
Opening Name: Sicilian Defense: Smith-Morra Gambit
SAN: 1. e4 c5 2. d4 cxd4 3. c3
UCI: e2e4 c7c5 d2d4 c5d4 c2c3
FEN: rnbqkbnr/pp1ppppp/8/8/3pP3/2P5/PP3PPP/RNBQKBNR b KQkq –

ECO: B21
Opening Name: Sicilian Defense: Smith-Morra Gambit Accepted
SAN: 1. e4 c5 2. d4 cxd4 3. c3 dxc3
UCI: e2e4 c7c5 d2d4 c5d4 c2c3 d4c3
FEN: rnbqkbnr/pp1ppppp/8/8/4P3/2p5/PP3PPP/RNBQKBNR w KQkq –

ECO: B21
Opening Name: Sicilian Defense: Smith-Morra Gambit Accepted, Chicago Defense
SAN: 1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Bc4 e6 6. Nf3 d6 7. O-O a6 8. Qe2 b5 9. Bb3 Ra7
UCI: e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 b8c6 f1c4 e7e6 g1f3 d7d6 e1g1 a7a6 d1e2 b7b5 c4b3 a8a7
FEN: 2bqkbnr/r4ppp/p1npp3/1p6/4P3/1BN2N2/PP2QPPP/R1B2RK1 w k –

ECO: B21
Opening Name: Sicilian Defense: Smith-Morra Gambit Accepted, Chicago Defense
SAN: 1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 d6 5. Nf3 e6 6. Bc4 Nf6 7. O-O a6
UCI: e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 d7d6 g1f3 e7e6 f1c4 g8f6 e1g1 a7a6
FEN: rnbqkb1r/1p3ppp/p2ppn2/8/2B1P3/2N2N2/PP3PPP/R1BQ1RK1 w kq –

ECO: B21
Opening Name: Sicilian Defense: Smith-Morra Gambit Accepted, Classical Formation
SAN: 1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 d6 6. Bc4 a6 7. O-O Nf6
UCI: e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 b8c6 g1f3 d7d6 f1c4 a7a6 e1g1 g8f6
FEN: r1bqkb1r/1p2pppp/p1np1n2/8/2B1P3/2N2N2/PP3PPP/R1BQ1RK1 w kq –

ECO: B21
Opening Name: Sicilian Defense: Smith-Morra Gambit Accepted, Danish Variation
SAN: 1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nf3
UCI: e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 g1f3
FEN: rnbqkbnr/pp1ppppp/8/8/4P3/2p2N2/PP3PPP/RNBQKB1R b KQkq –

ECO: B21
Opening Name: Sicilian Defense: Smith-Morra Gambit Accepted, Fianchetto Defense
SAN: 1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 g6
UCI: e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 b8c6 g1f3 g7g6
FEN: r1bqkbnr/pp1ppp1p/2n3p1/8/4P3/2N2N2/PP3PPP/R1BQKB1R w KQkq –

ECO: B21
Opening Name: Sicilian Defense: Smith-Morra Gambit Accepted, Finegold Defense
SAN: 1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 e6 5. Nf3 d6 6. Bc4 a6 7. O-O Be7 8. Qe2 Nf6
UCI: e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 e7e6 g1f3 d7d6 f1c4 a7a6 e1g1 f8e7 d1e2 g8f6
FEN: rnbqk2r/1p2bppp/p2ppn2/8/2B1P3/2N2N2/PP2QPPP/R1B2RK1 w kq –

ECO: B21
Opening Name: Sicilian Defense: Smith-Morra Gambit Accepted, Kan Formation
SAN: 1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 e6 5. Nf3 a6
UCI: e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 e7e6 g1f3 a7a6
FEN: rnbqkbnr/1p1p1ppp/p3p3/8/4P3/2N2N2/PP3PPP/R1BQKB1R w KQkq –

ECO: B21
Opening Name: Sicilian Defense: Smith-Morra Gambit Accepted, Larsen Defense
SAN: 1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 e6 6. Bc4 Qc7 7. Qe2 a6 8. O-O Bd6
UCI: e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 b8c6 g1f3 e7e6 f1c4 d8c7 d1e2 a7a6 e1g1 f8d6
FEN: r1b1k1nr/1pqp1ppp/p1nbp3/8/2B1P3/2N2N2/PP2QPPP/R1B2RK1 w kq –

ECO: B21
Opening Name: Sicilian Defense: Smith-Morra Gambit Accepted, Morphy Defense
SAN: 1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 e6 6. Bc4 Bc5
UCI: e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 b8c6 g1f3 e7e6 f1c4 f8c5
FEN: r1bqk1nr/pp1p1ppp/2n1p3/2b5/2B1P3/2N2N2/PP3PPP/R1BQK2R w KQkq –

ECO: B21
Opening Name: Sicilian Defense: Smith-Morra Gambit Accepted, Morphy Defense Deferred
SAN: 1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 e6 6. Bc4 a6 7. O-O b5 8. Bb3 Bc5
UCI: e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 b8c6 g1f3 e7e6 f1c4 a7a6 e1g1 b7b5 c4b3 f8c5
FEN: r1bqk1nr/3p1ppp/p1n1p3/1pb5/4P3/1BN2N2/PP3PPP/R1BQ1RK1 w kq –

ECO: B21
Opening Name: Sicilian Defense: Smith-Morra Gambit Accepted, Paulsen Formation
SAN: 1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 e6 6. Bc4 a6
UCI: e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 b8c6 g1f3 e7e6 f1c4 a7a6
FEN: r1bqkbnr/1p1p1ppp/p1n1p3/8/2B1P3/2N2N2/PP3PPP/R1BQK2R w KQkq –

ECO: B21
Opening Name: Sicilian Defense: Smith-Morra Gambit Accepted, Pin Defense
SAN: 1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 e6 6. Bc4 Bb4
UCI: e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 b8c6 g1f3 e7e6 f1c4 f8b4
FEN: r1bqk1nr/pp1p1ppp/2n1p3/8/1bB1P3/2N2N2/PP3PPP/R1BQK2R w KQkq –

ECO: B21
Opening Name: Sicilian Defense: Smith-Morra Gambit Accepted, Scheveningen Formation
SAN: 1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 d6 6. Bc4 e6
UCI: e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 b8c6 g1f3 d7d6 f1c4 e7e6
FEN: r1bqkbnr/pp3ppp/2npp3/8/2B1P3/2N2N2/PP3PPP/R1BQK2R w KQkq –

ECO: B21
Opening Name: Sicilian Defense: Smith-Morra Gambit Accepted, Siberian Variation
SAN: 1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 e6 6. Bc4 Qc7
UCI: e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 b8c6 g1f3 e7e6 f1c4 d8c7
FEN: r1b1kbnr/ppqp1ppp/2n1p3/8/2B1P3/2N2N2/PP3PPP/R1BQK2R w KQkq –

ECO: B21
Opening Name: Sicilian Defense: Smith-Morra Gambit Accepted, Siberian Variation, Siberian Trap
SAN: 1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 e6 6. Bc4 Qc7 7. Qe2 Nf6 8. O-O Ng4
UCI: e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 b8c6 g1f3 e7e6 f1c4 d8c7 d1e2 g8f6 e1g1 f6g4
FEN: r1b1kb1r/ppqp1ppp/2n1p3/8/2B1P1n1/2N2N2/PP2QPPP/R1B2RK1 w kq –

ECO: B21
Opening Name: Sicilian Defense: Smith-Morra Gambit Accepted, Sozin Formation
SAN: 1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Bc4 e6 6. Nf3 d6 7. O-O a6 8. Qe2 b5
UCI: e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 b8c6 f1c4 e7e6 g1f3 d7d6 e1g1 a7a6 d1e2 b7b5
FEN: r1bqkbnr/5ppp/p1npp3/1p6/2B1P3/2N2N2/PP2QPPP/R1B2RK1 w kq –

ECO: B21
Opening Name: Sicilian Defense: Smith-Morra Gambit Accepted, Taimanov Formation
SAN: 1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 e6 5. Bc4 a6 6. Nf3 Ne7
UCI: e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 e7e6 f1c4 a7a6 g1f3 g8e7
FEN: rnbqkb1r/1p1pnppp/p3p3/8/2B1P3/2N2N2/PP3PPP/R1BQK2R w KQkq –

ECO: B21
Opening Name: Sicilian Defense: Smith-Morra Gambit Declined, Alapin Formation
SAN: 1. e4 c5 2. d4 cxd4 3. c3 Nf6
UCI: e2e4 c7c5 d2d4 c5d4 c2c3 g8f6
FEN: rnbqkb1r/pp1ppppp/5n2/8/3pP3/2P5/PP3PPP/RNBQKBNR w KQkq –

ECO: B21
Opening Name: Sicilian Defense: Smith-Morra Gambit Declined, Center Formation
SAN: 1. e4 c5 2. d4 cxd4 3. c3 e5
UCI: e2e4 c7c5 d2d4 c5d4 c2c3 e7e5
FEN: rnbqkbnr/pp1p1ppp/8/4p3/3pP3/2P5/PP3PPP/RNBQKBNR w KQkq –

ECO: B21
Opening Name: Sicilian Defense: Smith-Morra Gambit Declined, Dubois Variation
SAN: 1. e4 c5 2. d4 cxd4 3. c3 d3 4. c4
UCI: e2e4 c7c5 d2d4 c5d4 c2c3 d4d3 c3c4
FEN: rnbqkbnr/pp1ppppp/8/8/2P1P3/3p4/PP3PPP/RNBQKBNR b KQkq –

ECO: B21
Opening Name: Sicilian Defense: Smith-Morra Gambit Declined, Push Variation
SAN: 1. e4 c5 2. d4 cxd4 3. c3 d3
UCI: e2e4 c7c5 d2d4 c5d4 c2c3 d4d3
FEN: rnbqkbnr/pp1ppppp/8/8/4P3/2Pp4/PP3PPP/RNBQKBNR w KQkq –

ECO: B21
Opening Name: Sicilian Defense: Smith-Morra Gambit Declined, Scandinavian Formation
SAN: 1. e4 c5 2. d4 cxd4 3. c3 d5
UCI: e2e4 c7c5 d2d4 c5d4 c2c3 d7d5
FEN: rnbqkbnr/pp2pppp/8/3p4/3pP3/2P5/PP3PPP/RNBQKBNR w KQkq –

ECO: B21
Opening Name: Sicilian Defense: Smith-Morra Gambit Declined, Wing Formation
SAN: 1. e4 c5 2. d4 cxd4 3. c3 Qa5
UCI: e2e4 c7c5 d2d4 c5d4 c2c3 d8a5
FEN: rnb1kbnr/pp1ppppp/8/q7/3pP3/2P5/PP3PPP/RNBQKBNR w KQkq –

ECO: B22
Opening Name: Sicilian Defense: Alapin Variation
SAN: 1. e4 c5 2. c3
UCI: e2e4 c7c5 c2c3
FEN: rnbqkbnr/pp1ppppp/8/2p5/4P3/2P5/PP1P1PPP/RNBQKBNR b KQkq –

ECO: B22
Opening Name: Sicilian Defense: Alapin Variation, Barmen Defense
SAN: 1. e4 c5 2. c3 d5 3. exd5 Qxd5
UCI: e2e4 c7c5 c2c3 d7d5 e4d5 d8d5
FEN: rnb1kbnr/pp2pppp/8/2pq4/8/2P5/PP1P1PPP/RNBQKBNR w KQkq –

ECO: B22
Opening Name: Sicilian Defense: Alapin Variation, Barmen Defense, Central Exchange
SAN: 1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 cxd4 5. cxd4 Nc6 6. Nf3 Bg4
UCI: e2e4 c7c5 c2c3 d7d5 e4d5 d8d5 d2d4 c5d4 c3d4 b8c6 g1f3 c8g4
FEN: r3kbnr/pp2pppp/2n5/3q4/3P2b1/5N2/PP3PPP/RNBQKB1R w KQkq –

ECO: B22
Opening Name: Sicilian Defense: Alapin Variation, Barmen Defense, Endgame Variation
SAN: 1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 cxd4 5. cxd4 Nc6 6. Nf3 Bg4 7. Nc3 Bxf3 8. gxf3 Qxd4 9. Qxd4 Nxd4
UCI: e2e4 c7c5 c2c3 d7d5 e4d5 d8d5 d2d4 c5d4 c3d4 b8c6 g1f3 c8g4 b1c3 g4f3 g2f3 d5d4 d1d4 c6d4
FEN: r3kbnr/pp2pppp/8/8/3n4/2N2P2/PP3P1P/R1B1KB1R w KQkq –

ECO: B22
Opening Name: Sicilian Defense: Alapin Variation, Barmen Defense, Milner-Barry Attack
SAN: 1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 Nc6 5. Nf3 cxd4 6. cxd4 e5 7. Nc3 Bb4 8. Be2
UCI: e2e4 c7c5 c2c3 d7d5 e4d5 d8d5 d2d4 b8c6 g1f3 c5d4 c3d4 e7e5 b1c3 f8b4 f1e2
FEN: r1b1k1nr/pp3ppp/2n5/3qp3/1b1P4/2N2N2/PP2BPPP/R1BQK2R b KQkq –

ECO: B22
Opening Name: Sicilian Defense: Alapin Variation, Barmen Defense, Modern Line
SAN: 1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 Nf6 5. Nf3 Bg4
UCI: e2e4 c7c5 c2c3 d7d5 e4d5 d8d5 d2d4 g8f6 g1f3 c8g4
FEN: rn2kb1r/pp2pppp/5n2/2pq4/3P2b1/2P2N2/PP3PPP/RNBQKB1R w KQkq –

ECO: B22
Opening Name: Sicilian Defense: Alapin Variation, Smith-Morra Declined
SAN: 1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. d4 cxd4
UCI: e2e4 c7c5 c2c3 g8f6 e4e5 f6d5 d2d4 c5d4
FEN: rnbqkb1r/pp1ppppp/8/3nP3/3p4/2P5/PP3PPP/RNBQKBNR w KQkq –

ECO: B22
Opening Name: Sicilian Defense: Alapin Variation, Stoltz Attack
SAN: 1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. Nf3 Nc6 5. Bc4 Nb6 6. Bb3
UCI: e2e4 c7c5 c2c3 g8f6 e4e5 f6d5 g1f3 b8c6 f1c4 d5b6 c4b3
FEN: r1bqkb1r/pp1ppppp/1nn5/2p1P3/8/1BP2N2/PP1P1PPP/RNBQK2R b KQkq –

ECO: B22
Opening Name: Sicilian Defense: Alapin Variation, Stoltz Attack, Ivanchuk Line
SAN: 1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. Nf3 Nc6 5. Bc4 Nb6 6. Bb3 c4 7. Bc2 Qc7 8. Qe2 g5
UCI: e2e4 c7c5 c2c3 g8f6 e4e5 f6d5 g1f3 b8c6 f1c4 d5b6 c4b3 c5c4 b3c2 d8c7 d1e2 g7g5
FEN: r1b1kb1r/ppqppp1p/1nn5/4P1p1/2p5/2P2N2/PPBPQPPP/RNB1K2R w KQkq –

ECO: B22
Opening Name: Sicilian Defense: Delayed Alapin Variation
SAN: 1. e4 c5 2. Nf3 e6 3. c3 d5 4. exd5 Qxd5 5. d4 Nf6
UCI: e2e4 c7c5 g1f3 e7e6 c2c3 d7d5 e4d5 d8d5 d2d4 g8f6
FEN: rnb1kb1r/pp3ppp/4pn2/2pq4/3P4/2P2N2/PP3PPP/RNBQKB1R w KQkq –

ECO: B22
Opening Name: Sicilian Defense: Heidenfeld Variation
SAN: 1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. Nf3 Nc6 5. Na3
UCI: e2e4 c7c5 c2c3 g8f6 e4e5 f6d5 g1f3 b8c6 b1a3
FEN: r1bqkb1r/pp1ppppp/2n5/2pnP3/8/N1P2N2/PP1P1PPP/R1BQKB1R b KQkq –

ECO: B23
Opening Name: Sicilian Defense: Closed
SAN: 1. e4 c5 2. Nc3
UCI: e2e4 c7c5 b1c3
FEN: rnbqkbnr/pp1ppppp/8/2p5/4P3/2N5/PPPP1PPP/R1BQKBNR b KQkq –

ECO: B23
Opening Name: Sicilian Defense: Closed
SAN: 1. e4 c5 2. Nc3 e6
UCI: e2e4 c7c5 b1c3 e7e6
FEN: rnbqkbnr/pp1p1ppp/4p3/2p5/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq –

ECO: B23
Opening Name: Sicilian Defense: Closed
SAN: 1. e4 c5 2. Nc3 e6 3. g3
UCI: e2e4 c7c5 b1c3 e7e6 g2g3
FEN: rnbqkbnr/pp1p1ppp/4p3/2p5/4P3/2N3P1/PPPP1P1P/R1BQKBNR b KQkq –

ECO: B23
Opening Name: Sicilian Defense: Closed, Chameleon Variation
SAN: 1. e4 c5 2. Nc3 Nc6 3. Nge2
UCI: e2e4 c7c5 b1c3 b8c6 g1e2
FEN: r1bqkbnr/pp1ppppp/2n5/2p5/4P3/2N5/PPPPNPPP/R1BQKB1R b KQkq –

ECO: B23
Opening Name: Sicilian Defense: Closed, Grob Attack
SAN: 1. e4 c5 2. Nc3 Nc6 3. g4
UCI: e2e4 c7c5 b1c3 b8c6 g2g4
FEN: r1bqkbnr/pp1ppppp/2n5/2p5/4P1P1/2N5/PPPP1P1P/R1BQKBNR b KQkq –

ECO: B23
Opening Name: Sicilian Defense: Closed, Korchnoi Defense
SAN: 1. e4 c5 2. Nc3 e6 3. g3 d5
UCI: e2e4 c7c5 b1c3 e7e6 g2g3 d7d5
FEN: rnbqkbnr/pp3ppp/4p3/2pp4/4P3/2N3P1/PPPP1P1P/R1BQKBNR w KQkq –

ECO: B23
Opening Name: Sicilian Defense: Closed, Traditional
SAN: 1. e4 c5 2. Nc3 Nc6
UCI: e2e4 c7c5 b1c3 b8c6
FEN: r1bqkbnr/pp1ppppp/2n5/2p5/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq –

ECO: B23
Opening Name: Sicilian Defense: Grand Prix Attack
SAN: 1. e4 c5 2. Nc3 Nc6 3. f4
UCI: e2e4 c7c5 b1c3 b8c6 f2f4
FEN: r1bqkbnr/pp1ppppp/2n5/2p5/4PP2/2N5/PPPP2PP/R1BQKBNR b KQkq –

ECO: B23
Opening Name: Sicilian Defense: Grand Prix Attack, Schofman Variation
SAN: 1. e4 c5 2. Nc3 Nc6 3. f4 g6 4. Nf3 Bg7 5. Bc4 e6 6. f5
UCI: e2e4 c7c5 b1c3 b8c6 f2f4 g7g6 g1f3 f8g7 f1c4 e7e6 f4f5
FEN: r1bqk1nr/pp1p1pbp/2n1p1p1/2p2P2/2B1P3/2N2N2/PPPP2PP/R1BQK2R b KQkq –

ECO: B24
Opening Name: Sicilian Defense: Closed
SAN: 1. e4 c5 2. Nc3 Nc6 3. g3 g6
UCI: e2e4 c7c5 b1c3 b8c6 g2g3 g7g6
FEN: r1bqkbnr/pp1ppp1p/2n3p1/2p5/4P3/2N3P1/PPPP1P1P/R1BQKBNR w KQkq –

ECO: B24
Opening Name: Sicilian Defense: Closed
SAN: 1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7
UCI: e2e4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7
FEN: r1bqk1nr/pp1pppbp/2n3p1/2p5/4P3/2N3P1/PPPP1PBP/R1BQK1NR w KQkq –

ECO: B24
Opening Name: Sicilian Defense: Closed, Fianchetto Variation
SAN: 1. e4 c5 2. Nc3 Nc6 3. g3
UCI: e2e4 c7c5 b1c3 b8c6 g2g3
FEN: r1bqkbnr/pp1ppppp/2n5/2p5/4P3/2N3P1/PPPP1P1P/R1BQKBNR b KQkq –

ECO: B24
Opening Name: Sicilian Defense: Closed, Smyslov Variation
SAN: 1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 e6 6. Be3 Nd4 7. Nce2
UCI: e2e4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 d2d3 e7e6 c1e3 c6d4 c3e2
FEN: r1bqk1nr/pp1p1pbp/4p1p1/2p5/3nP3/3PB1P1/PPP1NPBP/R2QK1NR b KQkq –

ECO: B25
Opening Name: Sicilian Defense: Closed
SAN: 1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6
UCI: e2e4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 d2d3 d7d6
FEN: r1bqk1nr/pp2ppbp/2np2p1/2p5/4P3/2NP2P1/PPP2PBP/R1BQK1NR w KQkq –

ECO: B25
Opening Name: Sicilian Defense: Closed
SAN: 1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. f4
UCI: e2e4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 d2d3 d7d6 f2f4
FEN: r1bqk1nr/pp2ppbp/2np2p1/2p5/4PP2/2NP2P1/PPP3BP/R1BQK1NR b KQkq –

ECO: B25
Opening Name: Sicilian Defense: Closed, Botvinnik Defense, Edge Variation
SAN: 1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. f4 e5 7. Nh3 Nge7
UCI: e2e4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 d2d3 d7d6 f2f4 e7e5 g1h3 g8e7
FEN: r1bqk2r/pp2npbp/2np2p1/2p1p3/4PP2/2NP2PN/PPP3BP/R1BQK2R w KQkq –

ECO: B25
Opening Name: Sicilian Defense: Closed, Botvinnik Defense, with Nge2
SAN: 1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. Nge2 e5
UCI: e2e4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 d2d3 d7d6 g1e2 e7e5
FEN: r1bqk1nr/pp3pbp/2np2p1/2p1p3/4P3/2NP2P1/PPP1NPBP/R1BQK2R w KQkq –

ECO: B25
Opening Name: Sicilian Defense: Closed, Botvinnik Defense, with f4
SAN: 1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. f4 e5
UCI: e2e4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 d2d3 d7d6 f2f4 e7e5
FEN: r1bqk1nr/pp3pbp/2np2p1/2p1p3/4PP2/2NP2P1/PPP3BP/R1BQK1NR w KQkq –

ECO: B26
Opening Name: Sicilian Defense: Closed
SAN: 1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. Be3
UCI: e2e4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 d2d3 d7d6 c1e3
FEN: r1bqk1nr/pp2ppbp/2np2p1/2p5/4P3/2NPB1P1/PPP2PBP/R2QK1NR b KQkq –

ECO: B27
Opening Name: Modern Defense: Pterodactyl Variation
SAN: 1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. Nc3 Qa5
UCI: e2e4 c7c5 g1f3 g7g6 d2d4 f8g7 b1c3 d8a5
FEN: rnb1k1nr/pp1pppbp/6p1/q1p5/3PP3/2N2N2/PPP2PPP/R1BQKB1R w KQkq –

ECO: B27
Opening Name: Pterodactyl Defense: Sicilian, Anhanguera
SAN: 1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. Nc3 Qa5 5. Be3
UCI: e2e4 c7c5 g1f3 g7g6 d2d4 f8g7 b1c3 d8a5 c1e3
FEN: rnb1k1nr/pp1pppbp/6p1/q1p5/3PP3/2N1BN2/PPP2PPP/R2QKB1R b KQkq –

ECO: B27
Opening Name: Pterodactyl Defense: Sicilian, Benoni Gambit
SAN: 1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. Nc3 Qa5 5. d5
UCI: e2e4 c7c5 g1f3 g7g6 d2d4 f8g7 b1c3 d8a5 d4d5
FEN: rnb1k1nr/pp1pppbp/6p1/q1pP4/4P3/2N2N2/PPP2PPP/R1BQKB1R b KQkq –

ECO: B27
Opening Name: Pterodactyl Defense: Sicilian, Pteranodon
SAN: 1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. dxc5 Qa5+ 5. Nc3 Bxc3+ 6. bxc3
UCI: e2e4 c7c5 g1f3 g7g6 d2d4 f8g7 d4c5 d8a5 b1c3 g7c3 b2c3
FEN: rnb1k1nr/pp1ppp1p/6p1/q1P5/4P3/2P2N2/P1P2PPP/R1BQKB1R b KQkq –

ECO: B27
Opening Name: Pterodactyl Defense: Sicilian, Rhamphorhynchus
SAN: 1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. dxc5 Qa5+ 5. Nc3
UCI: e2e4 c7c5 g1f3 g7g6 d2d4 f8g7 d4c5 d8a5 b1c3
FEN: rnb1k1nr/pp1pppbp/6p1/q1P5/4P3/2N2N2/PPP2PPP/R1BQKB1R b KQkq –

ECO: B27
Opening Name: Pterodactyl Defense: Sicilian, Unpin
SAN: 1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. Nc3 Qa5 5. Bd2
UCI: e2e4 c7c5 g1f3 g7g6 d2d4 f8g7 b1c3 d8a5 c1d2
FEN: rnb1k1nr/pp1pppbp/6p1/q1p5/3PP3/2N2N2/PPPB1PPP/R2QKB1R b KQkq –

ECO: B27
Opening Name: Pterodactyl Defense: Western, Pterodactyl
SAN: 1. e4 c5 2. Nf3 g6 3. c3 Bg7 4. d4 Qa5
UCI: e2e4 c7c5 g1f3 g7g6 c2c3 f8g7 d2d4 d8a5
FEN: rnb1k1nr/pp1pppbp/6p1/q1p5/3PP3/2P2N2/PP3PPP/RNBQKB1R w KQkq –

ECO: B27
Opening Name: Pterodactyl Defense: Western, Rhamphorhynchus
SAN: 1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. dxc5 Qa5+
UCI: e2e4 c7c5 g1f3 g7g6 d2d4 f8g7 d4c5 d8a5
FEN: rnb1k1nr/pp1pppbp/6p1/q1P5/4P3/5N2/PPP2PPP/RNBQKB1R w KQkq –

ECO: B27
Opening Name: Sicilian Defense
SAN: 1. e4 c5 2. Nf3
UCI: e2e4 c7c5 g1f3
FEN: rnbqkbnr/pp1ppppp/8/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq –

ECO: B27
Opening Name: Sicilian Defense: Acton Extension
SAN: 1. e4 c5 2. Nf3 g6 3. c4 Bh6
UCI: e2e4 c7c5 g1f3 g7g6 c2c4 f8h6
FEN: rnbqk1nr/pp1ppp1p/6pb/2p5/2P1P3/5N2/PP1P1PPP/RNBQKB1R w KQkq –

ECO: B27
Opening Name: Sicilian Defense: Brussels Gambit
SAN: 1. e4 c5 2. Nf3 f5
UCI: e2e4 c7c5 g1f3 f7f5
FEN: rnbqkbnr/pp1pp1pp/8/2p2p2/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq –

ECO: B27
Opening Name: Sicilian Defense: Bücker Variation
SAN: 1. e4 c5 2. Nf3 h6
UCI: e2e4 c7c5 g1f3 h7h6
FEN: rnbqkbnr/pp1pppp1/7p/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq –

ECO: B27
Opening Name: Sicilian Defense: Double-Dutch Gambit
SAN: 1. e4 c5 2. Nf3 f5 3. exf5 Nh6
UCI: e2e4 c7c5 g1f3 f7f5 e4f5 g8h6
FEN: rnbqkb1r/pp1pp1pp/7n/2p2P2/8/5N2/PPPP1PPP/RNBQKB1R w KQkq –

ECO: B27
Opening Name: Sicilian Defense: Frederico Variation
SAN: 1. e4 c5 2. Nf3 g6 3. d4 f5
UCI: e2e4 c7c5 g1f3 g7g6 d2d4 f7f5
FEN: rnbqkbnr/pp1pp2p/6p1/2p2p2/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq –

ECO: B27
Opening Name: Sicilian Defense: Hyperaccelerated Dragon
SAN: 1. e4 c5 2. Nf3 g6
UCI: e2e4 c7c5 g1f3 g7g6
FEN: rnbqkbnr/pp1ppp1p/6p1/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq –

ECO: B27
Opening Name: Sicilian Defense: Hyperaccelerated Fianchetto
SAN: 1. e4 c5 2. Nf3 g6 3. d4
UCI: e2e4 c7c5 g1f3 g7g6 d2d4
FEN: rnbqkbnr/pp1ppp1p/6p1/2p5/3PP3/5N2/PPP2PPP/RNBQKB1R b KQkq –

ECO: B27
Opening Name: Sicilian Defense: Hyperaccelerated Pterodactyl
SAN: 1. e4 c5 2. Nf3 g6 3. d4 Bg7
UCI: e2e4 c7c5 g1f3 g7g6 d2d4 f8g7
FEN: rnbqk1nr/pp1pppbp/6p1/2p5/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq –

ECO: B27
Opening Name: Sicilian Defense: Hyperaccelerated Pterodactyl, Exchange Variation
SAN: 1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. dxc5 Qa5+ 5. Nc3 Bxc3+ 6. bxc3 Qxc3+
UCI: e2e4 c7c5 g1f3 g7g6 d2d4 f8g7 d4c5 d8a5 b1c3 g7c3 b2c3 a5c3
FEN: rnb1k1nr/pp1ppp1p/6p1/2P5/4P3/2q2N2/P1P2PPP/R1BQKB1R w KQkq –

ECO: B27
Opening Name: Sicilian Defense: Jalalabad Variation
SAN: 1. e4 c5 2. Nf3 e5
UCI: e2e4 c7c5 g1f3 e7e5
FEN: rnbqkbnr/pp1p1ppp/8/2p1p3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq –

ECO: B27
Opening Name: Sicilian Defense: Katalimov Variation
SAN: 1. e4 c5 2. Nf3 b6
UCI: e2e4 c7c5 g1f3 b7b6
FEN: rnbqkbnr/p2ppppp/1p6/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq –

ECO: B27
Opening Name: Sicilian Defense: Mongoose Variation
SAN: 1. e4 c5 2. Nf3 Qa5
UCI: e2e4 c7c5 g1f3 d8a5
FEN: rnb1kbnr/pp1ppppp/8/q1p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq –

ECO: B27
Opening Name: Sicilian Defense: Polish Gambit
SAN: 1. e4 c5 2. Nf3 b5
UCI: e2e4 c7c5 g1f3 b7b5
FEN: rnbqkbnr/p2ppppp/8/1pp5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq –

ECO: B27
Opening Name: Sicilian Defense: Quinteros Variation
SAN: 1. e4 c5 2. Nf3 Qc7
UCI: e2e4 c7c5 g1f3 d8c7
FEN: rnb1kbnr/ppqppppp/8/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq –

ECO: B28
Opening Name: Sicilian Defense: O’Kelly Variation
SAN: 1. e4 c5 2. Nf3 a6
UCI: e2e4 c7c5 g1f3 a7a6
FEN: rnbqkbnr/1p1ppppp/p7/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq –

ECO: B28
Opening Name: Sicilian Defense: O’Kelly Variation, Aronin System
SAN: 1. e4 c5 2. Nf3 a6 3. Be2
UCI: e2e4 c7c5 g1f3 a7a6 f1e2
FEN: rnbqkbnr/1p1ppppp/p7/2p5/4P3/5N2/PPPPBPPP/RNBQK2R b KQkq –

ECO: B28
Opening Name: Sicilian Defense: O’Kelly Variation, Kieseritzky System
SAN: 1. e4 c5 2. Nf3 a6 3. b3
UCI: e2e4 c7c5 g1f3 a7a6 b2b3
FEN: rnbqkbnr/1p1ppppp/p7/2p5/4P3/1P3N2/P1PP1PPP/RNBQKB1R b KQkq –

ECO: B28
Opening Name: Sicilian Defense: O’Kelly Variation, Maróczy Bind
SAN: 1. e4 c5 2. Nf3 a6 3. c4
UCI: e2e4 c7c5 g1f3 a7a6 c2c4
FEN: rnbqkbnr/1p1ppppp/p7/2p5/2P1P3/5N2/PP1P1PPP/RNBQKB1R b KQkq –

ECO: B28
Opening Name: Sicilian Defense: O’Kelly Variation, Maróczy Bind, Paulsen Line
SAN: 1. e4 c5 2. Nf3 a6 3. c4 e6
UCI: e2e4 c7c5 g1f3 a7a6 c2c4 e7e6
FEN: rnbqkbnr/1p1p1ppp/p3p3/2p5/2P1P3/5N2/PP1P1PPP/RNBQKB1R w KQkq –

ECO: B28
Opening Name: Sicilian Defense: O’Kelly Variation, Maróczy Bind, Robatsch Line
SAN: 1. e4 c5 2. Nf3 a6 3. c4 d6
UCI: e2e4 c7c5 g1f3 a7a6 c2c4 d7d6
FEN: rnbqkbnr/1p2pppp/p2p4/2p5/2P1P3/5N2/PP1P1PPP/RNBQKB1R w KQkq –

ECO: B28
Opening Name: Sicilian Defense: O’Kelly Variation, Normal System
SAN: 1. e4 c5 2. Nf3 a6 3. d4
UCI: e2e4 c7c5 g1f3 a7a6 d2d4
FEN: rnbqkbnr/1p1ppppp/p7/2p5/3PP3/5N2/PPP2PPP/RNBQKB1R b KQkq –

ECO: B28
Opening Name: Sicilian Defense: O’Kelly Variation, Normal System, Cortlever Gambit
SAN: 1. e4 c5 2. Nf3 a6 3. d4 cxd4 4. Bc4
UCI: e2e4 c7c5 g1f3 a7a6 d2d4 c5d4 f1c4
FEN: rnbqkbnr/1p1ppppp/p7/8/2BpP3/5N2/PPP2PPP/RNBQK2R b KQkq –

ECO: B28
Opening Name: Sicilian Defense: O’Kelly Variation, Normal System, Smith-Morra Line
SAN: 1. e4 c5 2. Nf3 a6 3. d4 cxd4 4. c3
UCI: e2e4 c7c5 g1f3 a7a6 d2d4 c5d4 c2c3
FEN: rnbqkbnr/1p1ppppp/p7/8/3pP3/2P2N2/PP3PPP/RNBQKB1R b KQkq –

ECO: B28
Opening Name: Sicilian Defense: O’Kelly Variation, Normal System, Taimanov Line
SAN: 1. e4 c5 2. Nf3 a6 3. d4 cxd4 4. Nxd4 e5
UCI: e2e4 c7c5 g1f3 a7a6 d2d4 c5d4 f3d4 e7e5
FEN: rnbqkbnr/1p1p1ppp/p7/4p3/3NP3/8/PPP2PPP/RNBQKB1R w KQkq –

ECO: B28
Opening Name: Sicilian Defense: O’Kelly Variation, Normal System, Zagorovsky Line
SAN: 1. e4 c5 2. Nf3 a6 3. d4 cxd4 4. Qxd4
UCI: e2e4 c7c5 g1f3 a7a6 d2d4 c5d4 d1d4
FEN: rnbqkbnr/1p1ppppp/p7/8/3QP3/5N2/PPP2PPP/RNB1KB1R b KQkq –

ECO: B28
Opening Name: Sicilian Defense: O’Kelly Variation, Quiet System
SAN: 1. e4 c5 2. Nf3 a6 3. d3
UCI: e2e4 c7c5 g1f3 a7a6 d2d3
FEN: rnbqkbnr/1p1ppppp/p7/2p5/4P3/3P1N2/PPP2PPP/RNBQKB1R b KQkq –

ECO: B28
Opening Name: Sicilian Defense: O’Kelly Variation, Réti System
SAN: 1. e4 c5 2. Nf3 a6 3. g3
UCI: e2e4 c7c5 g1f3 a7a6 g2g3
FEN: rnbqkbnr/1p1ppppp/p7/2p5/4P3/5NP1/PPPP1P1P/RNBQKB1R b KQkq –

ECO: B28
Opening Name: Sicilian Defense: O’Kelly Variation, Venice System
SAN: 1. e4 c5 2. Nf3 a6 3. c3
UCI: e2e4 c7c5 g1f3 a7a6 c2c3
FEN: rnbqkbnr/1p1ppppp/p7/2p5/4P3/2P2N2/PP1P1PPP/RNBQKB1R b KQkq –

ECO: B28
Opening Name: Sicilian Defense: O’Kelly Variation, Venice System, Barcza Line
SAN: 1. e4 c5 2. Nf3 a6 3. c3 Nf6
UCI: e2e4 c7c5 g1f3 a7a6 c2c3 g8f6
FEN: rnbqkb1r/1p1ppppp/p4n2/2p5/4P3/2P2N2/PP1P1PPP/RNBQKB1R w KQkq –

ECO: B28
Opening Name: Sicilian Defense: O’Kelly Variation, Venice System, Gambit Line
SAN: 1. e4 c5 2. Nf3 a6 3. c3 d5 4. exd5 Nf6
UCI: e2e4 c7c5 g1f3 a7a6 c2c3 d7d5 e4d5 g8f6
FEN: rnbqkb1r/1p2pppp/p4n2/2pP4/8/2P2N2/PP1P1PPP/RNBQKB1R w KQkq –

ECO: B28
Opening Name: Sicilian Defense: O’Kelly Variation, Venice System, Ljubojevic Line
SAN: 1. e4 c5 2. Nf3 a6 3. c3 b5
UCI: e2e4 c7c5 g1f3 a7a6 c2c3 b7b5
FEN: rnbqkbnr/3ppppp/p7/1pp5/4P3/2P2N2/PP1P1PPP/RNBQKB1R w KQkq –

ECO: B28
Opening Name: Sicilian Defense: O’Kelly Variation, Venice System, Steiner Line
SAN: 1. e4 c5 2. Nf3 a6 3. c3 d6
UCI: e2e4 c7c5 g1f3 a7a6 c2c3 d7d6
FEN: rnbqkbnr/1p2pppp/p2p4/2p5/4P3/2P2N2/PP1P1PPP/RNBQKB1R w KQkq –

ECO: B28
Opening Name: Sicilian Defense: O’Kelly Variation, Wing Gambit
SAN: 1. e4 c5 2. Nf3 a6 3. b4
UCI: e2e4 c7c5 g1f3 a7a6 b2b4
FEN: rnbqkbnr/1p1ppppp/p7/2p5/1P2P3/5N2/P1PP1PPP/RNBQKB1R b KQkq –

ECO: B28
Opening Name: Sicilian Defense: O’Kelly Variation, Yerevan System
SAN: 1. e4 c5 2. Nf3 a6 3. Nc3
UCI: e2e4 c7c5 g1f3 a7a6 b1c3
FEN: rnbqkbnr/1p1ppppp/p7/2p5/4P3/2N2N2/PPPP1PPP/R1BQKB1R b KQkq –

ECO: B29
Opening Name: Sicilian Defense: Nimzowitsch Variation
SAN: 1. e4 c5 2. Nf3 Nf6
UCI: e2e4 c7c5 g1f3 g8f6
FEN: rnbqkb1r/pp1ppppp/5n2/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq –

ECO: B29
Opening Name: Sicilian Defense: Nimzowitsch Variation, Advance Variation
SAN: 1. e4 c5 2. Nf3 Nf6 3. e5
UCI: e2e4 c7c5 g1f3 g8f6 e4e5
FEN: rnbqkb1r/pp1ppppp/5n2/2p1P3/8/5N2/PPPP1PPP/RNBQKB1R b KQkq –

ECO: B29
Opening Name: Sicilian Defense: Nimzowitsch Variation, Closed Variation
SAN: 1. e4 c5 2. Nf3 Nf6 3. Nc3
UCI: e2e4 c7c5 g1f3 g8f6 b1c3
FEN: rnbqkb1r/pp1ppppp/5n2/2p5/4P3/2N2N2/PPPP1PPP/R1BQKB1R b KQkq –

ECO: B29
Opening Name: Sicilian Defense: Nimzowitsch Variation, Exchange Variation
SAN: 1. e4 c5 2. Nf3 Nf6 3. e5 Nd5 4. Nc3 Nxc3
UCI: e2e4 c7c5 g1f3 g8f6 e4e5 f6d5 b1c3 d5c3
FEN: rnbqkb1r/pp1ppppp/8/2p1P3/8/2n2N2/PPPP1PPP/R1BQKB1R w KQkq –

ECO: B29
Opening Name: Sicilian Defense: Nimzowitsch Variation, Main Line
SAN: 1. e4 c5 2. Nf3 Nf6 3. e5 Nd5 4. Nc3 e6 5. Nxd5 exd5 6. d4 Nc6
UCI: e2e4 c7c5 g1f3 g8f6 e4e5 f6d5 b1c3 e7e6 c3d5 e6d5 d2d4 b8c6
FEN: r1bqkb1r/pp1p1ppp/2n5/2ppP3/3P4/5N2/PPP2PPP/R1BQKB1R w KQkq –

ECO: B30
Opening Name: Sicilian Defense: Closed, Anti-Sveshnikov Variation, Kharlov-Kramnik Line
SAN: 1. e4 c5 2. Nf3 Nc6 3. Nc3 e5 4. Bc4 Be7 5. d3 d6 6. Nd2 Bg5
UCI: e2e4 c7c5 g1f3 b8c6 b1c3 e7e5 f1c4 f8e7 d2d3 d7d6 f3d2 e7g5
FEN: r1bqk1nr/pp3ppp/2np4/2p1p1b1/2B1P3/2NP4/PPPN1PPP/R1BQK2R w KQkq –

ECO: B30
Opening Name: Sicilian Defense: Closed, Anti-Sveshnikov Variation, with Nf6
SAN: 1. e4 c5 2. Nf3 Nc6 3. Nc3 e5 4. Bc4 Be7 5. d3 Nf6
UCI: e2e4 c7c5 g1f3 b8c6 b1c3 e7e5 f1c4 f8e7 d2d3 g8f6
FEN: r1bqk2r/pp1pbppp/2n2n2/2p1p3/2B1P3/2NP1N2/PPP2PPP/R1BQK2R w KQkq –

ECO: B30
Opening Name: Sicilian Defense: Closed, Anti-Sveshnikov Variation, with d6
SAN: 1. e4 c5 2. Nf3 Nc6 3. Nc3 e5 4. Bc4 Be7 5. d3 d6
UCI: e2e4 c7c5 g1f3 b8c6 b1c3 e7e5 f1c4 f8e7 d2d3 d7d6
FEN: r1bqk1nr/pp2bppp/2np4/2p1p3/2B1P3/2NP1N2/PPP2PPP/R1BQK2R w KQkq –

ECO: B30
Opening Name: Sicilian Defense: Nyezhmetdinov-Rossolimo Attack
SAN: 1. e4 c5 2. Nf3 Nc6 3. Bb5
UCI: e2e4 c7c5 g1f3 b8c6 f1b5
FEN: r1bqkbnr/pp1ppppp/2n5/1Bp5/4P3/5N2/PPPP1PPP/RNBQK2R b KQkq –

ECO: B30
Opening Name: Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, San Francisco Gambit
SAN: 1. e4 c5 2. Nf3 Nc6 3. Bb5 Na5 4. b4
UCI: e2e4 c7c5 g1f3 b8c6 f1b5 c6a5 b2b4
FEN: r1bqkbnr/pp1ppppp/8/nBp5/1P2P3/5N2/P1PP1PPP/RNBQK2R b KQkq –

ECO: B30
Opening Name: Sicilian Defense: Old Sicilian
SAN: 1. e4 c5 2. Nf3 Nc6
UCI: e2e4 c7c5 g1f3 b8c6
FEN: r1bqkbnr/pp1ppppp/2n5/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq –

ECO: B30
Opening Name: Sicilian Defense: Portsmouth Gambit
SAN: 1. e4 c5 2. Nf3 Nc6 3. b4
UCI: e2e4 c7c5 g1f3 b8c6 b2b4
FEN: r1bqkbnr/pp1ppppp/2n5/2p5/1P2P3/5N2/P1PP1PPP/RNBQKB1R b KQkq –

ECO: B30
Opening Name: Sicilian Defense: Rossolimo Variation, Brooklyn Retreat Defense
SAN: 1. e4 c5 2. Nf3 Nc6 3. Bb5 Nb8
UCI: e2e4 c7c5 g1f3 b8c6 f1b5 c6b8
FEN: rnbqkbnr/pp1ppppp/8/1Bp5/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: B31
Opening Name: Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation
SAN: 1. e4 c5 2. Nf3 Nc6 3. Bb5 g6
UCI: e2e4 c7c5 g1f3 b8c6 f1b5 g7g6
FEN: r1bqkbnr/pp1ppp1p/2n3p1/1Bp5/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: B31
Opening Name: Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation, Gufeld Gambit
SAN: 1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. O-O Bg7 5. c3 e5 6. d4
UCI: e2e4 c7c5 g1f3 b8c6 f1b5 g7g6 e1g1 f8g7 c2c3 e7e5 d2d4
FEN: r1bqk1nr/pp1p1pbp/2n3p1/1Bp1p3/3PP3/2P2N2/PP3PPP/RNBQ1RK1 b kq –

ECO: B31
Opening Name: Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation, Lutikov Gambit
SAN: 1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. O-O Bg7 5. c3 Nf6 6. d4
UCI: e2e4 c7c5 g1f3 b8c6 f1b5 g7g6 e1g1 f8g7 c2c3 g8f6 d2d4
FEN: r1bqk2r/pp1pppbp/2n2np1/1Bp5/3PP3/2P2N2/PP3PPP/RNBQ1RK1 b kq –

ECO: B31
Opening Name: Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation, Totsky Attack
SAN: 1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. O-O Bg7 5. c3 Nf6 6. Qa4
UCI: e2e4 c7c5 g1f3 b8c6 f1b5 g7g6 e1g1 f8g7 c2c3 g8f6 d1a4
FEN: r1bqk2r/pp1pppbp/2n2np1/1Bp5/Q3P3/2P2N2/PP1P1PPP/RNB2RK1 b kq –

ECO: B31
Opening Name: Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Gurgenidze Variation
SAN: 1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. O-O Bg7 5. Re1 e5 6. b4
UCI: e2e4 c7c5 g1f3 b8c6 f1b5 g7g6 e1g1 f8g7 f1e1 e7e5 b2b4
FEN: r1bqk1nr/pp1p1pbp/2n3p1/1Bp1p3/1P2P3/5N2/P1PP1PPP/RNBQR1K1 b kq –

ECO: B32
Opening Name: Sicilian Defense: Accelerated Dragon
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6
FEN: r1bqkbnr/pp1ppp1p/2n3p1/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq –

ECO: B32
Opening Name: Sicilian Defense: Flohr Variation
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Qc7
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 d8c7
FEN: r1b1kbnr/ppqppppp/2n5/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq –

ECO: B32
Opening Name: Sicilian Defense: Franco-Sicilian Variation
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 e6
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 e7e6
FEN: r1bqkbnr/pp1p1ppp/2n1p3/2p5/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq –

ECO: B32
Opening Name: Sicilian Defense: Godiva Variation
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Qb6
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 d8b6
FEN: r1b1kbnr/pp1ppppp/1qn5/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq –

ECO: B32
Opening Name: Sicilian Defense: Kalashnikov Variation
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 5. Nb5 d6
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 e7e5 d4b5 d7d6
FEN: r1bqkbnr/pp3ppp/2np4/1N2p3/4P3/8/PPP2PPP/RNBQKB1R w KQkq –

ECO: B32
Opening Name: Sicilian Defense: Löwenthal Variation
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 e7e5
FEN: r1bqkbnr/pp1p1ppp/2n5/4p3/3NP3/8/PPP2PPP/RNBQKB1R w KQkq –

ECO: B32
Opening Name: Sicilian Defense: Nimzo-American Variation
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 d5
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 d7d5
FEN: r1bqkbnr/pp2pppp/2n5/3p4/3NP3/8/PPP2PPP/RNBQKB1R w KQkq –

ECO: B32
Opening Name: Sicilian Defense: O’Kelly Variation, Maróczy Bind, Geller Line
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 a6 5. c4 e5
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 a7a6 c2c4 e7e5
FEN: r1bqkbnr/1p1p1ppp/p1n5/4p3/2PNP3/8/PP3PPP/RNBQKB1R w KQkq –

ECO: B32
Opening Name: Sicilian Defense: Open
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4
UCI: e2e4 c7c5 g1f3 b8c6 d2d4
FEN: r1bqkbnr/pp1ppppp/2n5/2p5/3PP3/5N2/PPP2PPP/RNBQKB1R b KQkq –

ECO: B32
Opening Name: Sicilian Defense: Open
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4
FEN: r1bqkbnr/pp1ppppp/2n5/8/3pP3/5N2/PPP2PPP/RNBQKB1R w KQkq –

ECO: B32
Opening Name: Sicilian Defense: Open
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4
FEN: r1bqkbnr/pp1ppppp/2n5/8/3NP3/8/PPP2PPP/RNBQKB1R b KQkq –

ECO: B33
Opening Name: Sicilian Defense: Four Knights Variation, Cobra Variation
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bc5
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e6 d4b5 f8c5
FEN: r1bqk2r/pp1p1ppp/2n1pn2/1Nb5/4P3/2N5/PPP2PPP/R1BQKB1R w KQkq –

ECO: B33
Opening Name: Sicilian Defense: Lasker-Pelikan Variation
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e5
FEN: r1bqkb1r/pp1p1ppp/2n2n2/4p3/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq –

ECO: B33
Opening Name: Sicilian Defense: Lasker-Pelikan Variation, Bird Variation
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 Be6
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e5 d4b5 d7d6 c1g5 a7a6 b5a3 c8e6
FEN: r2qkb1r/1p3ppp/p1npbn2/4p1B1/4P3/N1N5/PPP2PPP/R2QKB1R w KQkq –

ECO: B33
Opening Name: Sicilian Defense: Lasker-Pelikan Variation, Exchange Variation
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Nxc6
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e5 d4c6
FEN: r1bqkb1r/pp1p1ppp/2N2n2/4p3/4P3/2N5/PPP2PPP/R1BQKB1R b KQkq –

ECO: B33
Opening Name: Sicilian Defense: Lasker-Pelikan Variation, Retreat Variation
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Nf3
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e5 d4f3
FEN: r1bqkb1r/pp1p1ppp/2n2n2/4p3/4P3/2N2N2/PPP2PPP/R1BQKB1R b KQkq –

ECO: B33
Opening Name: Sicilian Defense: Lasker-Pelikan Variation, Schlechter Variation
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Nb3
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e5 d4b3
FEN: r1bqkb1r/pp1p1ppp/2n2n2/4p3/4P3/1NN5/PPP2PPP/R1BQKB1R b KQkq –

ECO: B33
Opening Name: Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e5 d4b5 d7d6 c1g5 a7a6 b5a3 b7b5
FEN: r1bqkb1r/5ppp/p1np1n2/1p2p1B1/4P3/N1N5/PPP2PPP/R2QKB1R w KQkq –

ECO: B33
Opening Name: Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5 9. Bxf6 gxf6 10. Nd5 f5
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e5 d4b5 d7d6 c1g5 a7a6 b5a3 b7b5 g5f6 g7f6 c3d5 f6f5
FEN: r1bqkb1r/5p1p/p1np4/1p1Npp2/4P3/N7/PPP2PPP/R2QKB1R w KQkq –

ECO: B33
Opening Name: Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Chelyabinsk Variation
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5 9. Nd5
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e5 d4b5 d7d6 c1g5 a7a6 b5a3 b7b5 c3d5
FEN: r1bqkb1r/5ppp/p1np1n2/1p1Np1B1/4P3/N7/PPP2PPP/R2QKB1R b KQkq –

ECO: B33
Opening Name: Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Novosibirsk Variation
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5 9. Bxf6 gxf6 10. Nd5 Bg7
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e5 d4b5 d7d6 c1g5 a7a6 b5a3 b7b5 g5f6 g7f6 c3d5 f8g7
FEN: r1bqk2r/5pbp/p1np1p2/1p1Np3/4P3/N7/PPP2PPP/R2QKB1R w KQkq –

ECO: B33
Opening Name: Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Peresypkin’s Sacrifice
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5 9. Bxf6 gxf6 10. Nd5 f5 11. Bxb5
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e5 d4b5 d7d6 c1g5 a7a6 b5a3 b7b5 g5f6 g7f6 c3d5 f6f5 f1b5
FEN: r1bqkb1r/5p1p/p1np4/1B1Npp2/4P3/N7/PPP2PPP/R2QK2R b KQkq –

ECO: B33
Opening Name: Sicilian Defense: Open
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6
FEN: r1bqkb1r/pp1ppppp/2n2n2/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq –

ECO: B34
Opening Name: Sicilian Defense: Accelerated Dragon, Exchange Variation
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nxc6
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 d4c6
FEN: r1bqkbnr/pp1ppp1p/2N3p1/8/4P3/8/PPP2PPP/RNBQKB1R b KQkq –

ECO: B34
Opening Name: Sicilian Defense: Accelerated Dragon, Modern Variation
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 b1c3
FEN: r1bqkbnr/pp1ppp1p/2n3p1/8/3NP3/2N5/PPP2PPP/R1BQKB1R b KQkq –

ECO: B35
Opening Name: Sicilian Defense: Accelerated Dragon, Modern Bc4 Variation
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 Nf6 7. Bc4
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 b1c3 f8g7 c1e3 g8f6 f1c4
FEN: r1bqk2r/pp1pppbp/2n2np1/8/2BNP3/2N1B3/PPP2PPP/R2QK2R b KQkq –

ECO: B35
Opening Name: Sicilian Defense: Dragon Variation, Modern Bc4 Variation
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 Nf6 7. Bc4 d6
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 b1c3 f8g7 c1e3 g8f6 f1c4 d7d6
FEN: r1bqk2r/pp2ppbp/2np1np1/8/2BNP3/2N1B3/PPP2PPP/R2QK2R w KQkq –

ECO: B36
Opening Name: Sicilian Defense: Accelerated Dragon, Maróczy Bind
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 c2c4
FEN: r1bqkbnr/pp1ppp1p/2n3p1/8/2PNP3/8/PP3PPP/RNBQKB1R b KQkq –

ECO: B36
Opening Name: Sicilian Defense: Accelerated Dragon, Maróczy Bind, Gurgenidze Variation
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 Nf6 6. Nc3 Nxd4 7. Qxd4 d6
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 c2c4 g8f6 b1c3 c6d4 d1d4 d7d6
FEN: r1bqkb1r/pp2pp1p/3p1np1/8/2PQP3/2N5/PP3PPP/R1B1KB1R w KQkq –

ECO: B37
Opening Name: Sicilian Defense: Accelerated Dragon, Maróczy Bind
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 Bg7
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 c2c4 f8g7
FEN: r1bqk1nr/pp1pppbp/2n3p1/8/2PNP3/8/PP3PPP/RNBQKB1R w KQkq –

ECO: B37
Opening Name: Sicilian Defense: Accelerated Dragon, Simagin Variation
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 Bg7 6. Nc2 d6 7. Be2 Nh6
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 c2c4 f8g7 d4c2 d7d6 f1e2 g8h6
FEN: r1bqk2r/pp2ppbp/2np2pn/8/2P1P3/8/PPN1BPPP/RNBQK2R w KQkq –

ECO: B38
Opening Name: Sicilian Defense: Accelerated Dragon, Maróczy Bind
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 Bg7 6. Be3
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 c2c4 f8g7 c1e3
FEN: r1bqk1nr/pp1pppbp/2n3p1/8/2PNP3/4B3/PP3PPP/RN1QKB1R b KQkq –

ECO: B39
Opening Name: Sicilian Defense: Accelerated Dragon, Maróczy Bind, Breyer Variation
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 Bg7 6. Be3 Nf6 7. Nc3 Ng4
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 c2c4 f8g7 c1e3 g8f6 b1c3 f6g4
FEN: r1bqk2r/pp1pppbp/2n3p1/8/2PNP1n1/2N1B3/PP3PPP/R2QKB1R w KQkq –

ECO: B40
Opening Name: Sicilian Defense: Alapin Variation, Sherzer Variation
SAN: 1. e4 c5 2. Nf3 e6 3. c3 Nf6 4. e5 Nd5 5. d4 Nc6
UCI: e2e4 c7c5 g1f3 e7e6 c2c3 g8f6 e4e5 f6d5 d2d4 b8c6
FEN: r1bqkb1r/pp1p1ppp/2n1p3/2pnP3/3P4/2P2N2/PP3PPP/RNBQKB1R w KQkq –

ECO: B40
Opening Name: Sicilian Defense: Delayed Alapin Variation, with e6
SAN: 1. e4 c5 2. Nf3 e6 3. c3
UCI: e2e4 c7c5 g1f3 e7e6 c2c3
FEN: rnbqkbnr/pp1p1ppp/4p3/2p5/4P3/2P2N2/PP1P1PPP/RNBQKB1R b KQkq –

ECO: B40
Opening Name: Sicilian Defense: Drazic Variation
SAN: 1. e4 c5 2. Nf3 e6 3. d4 a6
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 a7a6
FEN: rnbqkbnr/1p1p1ppp/p3p3/2p5/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq –

ECO: B40
Opening Name: Sicilian Defense: Four Knights Variation
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6
FEN: r1bqkb1r/pp1p1ppp/2n1pn2/8/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq –

ECO: B40
Opening Name: Sicilian Defense: Four Knights Variation, Exchange Variation
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Nxc6
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 d4c6
FEN: r1bqkb1r/pp1p1ppp/2N1pn2/8/4P3/2N5/PPP2PPP/R1BQKB1R b KQkq –

ECO: B40
Opening Name: Sicilian Defense: French Variation
SAN: 1. e4 c5 2. Nf3 e6
UCI: e2e4 c7c5 g1f3 e7e6
FEN: rnbqkbnr/pp1p1ppp/4p3/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq –

ECO: B40
Opening Name: Sicilian Defense: French Variation, Normal
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6
FEN: rnbqkb1r/pp1p1ppp/4pn2/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq –

ECO: B40
Opening Name: Sicilian Defense: French Variation, Open
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4
FEN: rnbqkbnr/pp1p1ppp/4p3/8/3pP3/5N2/PPP2PPP/RNBQKB1R w KQkq –

ECO: B40
Opening Name: Sicilian Defense: French Variation, Westerinen Attack
SAN: 1. e4 c5 2. Nf3 e6 3. b3
UCI: e2e4 c7c5 g1f3 e7e6 b2b3
FEN: rnbqkbnr/pp1p1ppp/4p3/2p5/4P3/1P3N2/P1PP1PPP/RNBQKB1R b KQkq –

ECO: B40
Opening Name: Sicilian Defense: Gaw-Paw Variation
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Qb6
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 d8b6
FEN: rnb1kb1r/pp1p1ppp/1q2pn2/8/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq –

ECO: B40
Opening Name: Sicilian Defense: Kan Variation, Wing Attack, Fianchetto Variation
SAN: 1. e4 c5 2. Nf3 e6 3. Nc3 a6 4. g3 b5 5. d4 cxd4 6. Nxd4
UCI: e2e4 c7c5 g1f3 e7e6 b1c3 a7a6 g2g3 b7b5 d2d4 c5d4 f3d4
FEN: rnbqkbnr/3p1ppp/p3p3/1p6/3NP3/2N3P1/PPP2P1P/R1BQKB1R b KQkq –

ECO: B40
Opening Name: Sicilian Defense: Kramnik Variation
SAN: 1. e4 c5 2. Nf3 e6 3. c4
UCI: e2e4 c7c5 g1f3 e7e6 c2c4
FEN: rnbqkbnr/pp1p1ppp/4p3/2p5/2P1P3/5N2/PP1P1PPP/RNBQKB1R b KQkq –

ECO: B40
Opening Name: Sicilian Defense: Kveinis Variation
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Qb6
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 d8b6
FEN: rnb1kbnr/pp1p1ppp/1q2p3/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq –

ECO: B40
Opening Name: Sicilian Defense: Marshall Counterattack
SAN: 1. e4 c5 2. Nf3 e6 3. d4 d5
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 d7d5
FEN: rnbqkbnr/pp3ppp/4p3/2pp4/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq –

ECO: B40
Opening Name: Sicilian Defense: Paulsen-Basman Defense
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Bc5
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 f8c5
FEN: rnbqk1nr/pp1p1ppp/4p3/2b5/3NP3/8/PPP2PPP/RNBQKB1R w KQkq –

ECO: B40
Opening Name: Sicilian Defense: Pin Variation
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Bb4
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 f8b4
FEN: rnbqk2r/pp1p1ppp/4pn2/8/1b1NP3/2N5/PPP2PPP/R1BQKB1R w KQkq –

ECO: B40
Opening Name: Sicilian Defense: Pin Variation, Jaffe Variation
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Bb4 6. Bd3 e5
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 f8b4 f1d3 e6e5
FEN: rnbqk2r/pp1p1ppp/5n2/4p3/1b1NP3/2NB4/PPP2PPP/R1BQK2R w KQkq –

ECO: B40
Opening Name: Sicilian Defense: Pin Variation, Koch Variation
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Bb4 6. e5
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 f8b4 e4e5
FEN: rnbqk2r/pp1p1ppp/4pn2/4P3/1b1N4/2N5/PPP2PPP/R1BQKB1R b KQkq –

ECO: B40
Opening Name: Sicilian Defense: Smith-Morra Gambit Deferred
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. c3
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 c2c3
FEN: rnbqkbnr/pp1p1ppp/4p3/8/3pP3/2P2N2/PP3PPP/RNBQKB1R b KQkq –

ECO: B40
Opening Name: Sicilian Defense: Wing Gambit Deferred
SAN: 1. e4 c5 2. Nf3 e6 3. b4
UCI: e2e4 c7c5 g1f3 e7e6 b2b4
FEN: rnbqkbnr/pp1p1ppp/4p3/2p5/1P2P3/5N2/P1PP1PPP/RNBQKB1R b KQkq –

ECO: B41
Opening Name: Sicilian Defense: Kan Variation
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 a7a6
FEN: rnbqkbnr/1p1p1ppp/p3p3/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq –

ECO: B41
Opening Name: Sicilian Defense: Kan Variation, Maróczy Bind, Bronstein Variation
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. c4 Nf6 6. Nc3 Bb4 7. Bd3 Nc6
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 a7a6 c2c4 g8f6 b1c3 f8b4 f1d3 b8c6
FEN: r1bqk2r/1p1p1ppp/p1n1pn2/8/1bPNP3/2NB4/PP3PPP/R1BQK2R w KQkq –

ECO: B41
Opening Name: Sicilian Defense: Kan Variation, Maróczy Bind, Bronstein Variation
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. c4 Nf6 6. Nc3 Bb4 7. Bd3 Nc6 8. Bc2
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 a7a6 c2c4 g8f6 b1c3 f8b4 f1d3 b8c6 d3c2
FEN: r1bqk2r/1p1p1ppp/p1n1pn2/8/1bPNP3/2N5/PPB2PPP/R1BQK2R b KQkq –

ECO: B41
Opening Name: Sicilian Defense: Kan Variation, Maróczy Bind, Hedgehog Variation
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. c4 g6
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 a7a6 c2c4 g7g6
FEN: rnbqkbnr/1p1p1p1p/p3p1p1/8/2PNP3/8/PP3PPP/RNBQKB1R w KQkq –

ECO: B41
Opening Name: Sicilian Defense: Kan Variation, Maróczy Bind, Réti Variation
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. c4
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 a7a6 c2c4
FEN: rnbqkbnr/1p1p1ppp/p3p3/8/2PNP3/8/PP3PPP/RNBQKB1R b KQkq –

ECO: B42
Opening Name: Sicilian Defense: Kan Variation, Gipslis Variation
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Nf6 6. O-O d6 7. c4 g6
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 a7a6 f1d3 g8f6 e1g1 d7d6 c2c4 g7g6
FEN: rnbqkb1r/1p3p1p/p2ppnp1/8/2PNP3/3B4/PP3PPP/RNBQ1RK1 w kq –

ECO: B42
Opening Name: Sicilian Defense: Kan Variation, Modern Variation
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 a7a6 f1d3
FEN: rnbqkbnr/1p1p1ppp/p3p3/8/3NP3/3B4/PPP2PPP/RNBQK2R b KQkq –

ECO: B42
Opening Name: Sicilian Defense: Kan Variation, Polugaevsky Variation
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Bc5
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 a7a6 f1d3 f8c5
FEN: rnbqk1nr/1p1p1ppp/p3p3/2b5/3NP3/3B4/PPP2PPP/RNBQK2R w KQkq –

ECO: B42
Opening Name: Sicilian Defense: Kan Variation, Swiss Cheese Variation
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 g6
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 a7a6 f1d3 g7g6
FEN: rnbqkbnr/1p1p1p1p/p3p1p1/8/3NP3/3B4/PPP2PPP/RNBQK2R w KQkq –

ECO: B43
Opening Name: Sicilian Defense: Kan Variation, Knight Variation
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 a7a6 b1c3
FEN: rnbqkbnr/1p1p1ppp/p3p3/8/3NP3/2N5/PPP2PPP/R1BQKB1R b KQkq –

ECO: B43
Opening Name: Sicilian Defense: Kan Variation, Wing Attack
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 b5
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 a7a6 b1c3 b7b5
FEN: rnbqkbnr/3p1ppp/p3p3/1p6/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq –

ECO: B43
Opening Name: Sicilian Defense: Kan Variation, Wing Attack, Christiansen’s Dream
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 b5 6. Bd3 Qb6 7. Be3 Bc5 8. Qg4
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 a7a6 b1c3 b7b5 f1d3 d8b6 c1e3 f8c5 d1g4
FEN: rnb1k1nr/3p1ppp/pq2p3/1pb5/3NP1Q1/2NBB3/PPP2PPP/R3K2R b KQkq –

ECO: B43
Opening Name: Sicilian Defense: Kan Variation, Wing Attack, Spraggett Attack
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 b5 6. Bd3 Qb6 7. Nf3
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 a7a6 b1c3 b7b5 f1d3 d8b6 d4f3
FEN: rnb1kbnr/3p1ppp/pq2p3/1p6/4P3/2NB1N2/PPP2PPP/R1BQK2R b KQkq –

ECO: B44
Opening Name: Sicilian Defense: Taimanov Variation
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6
FEN: r1bqkbnr/pp1p1ppp/2n1p3/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq –

ECO: B44
Opening Name: Sicilian Defense: Taimanov Variation, Gary Gambit
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nb5 d6 6. c4 Nf6 7. N1c3 a6 8. Na3 d5
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 d4b5 d7d6 c2c4 g8f6 b1c3 a7a6 b5a3 d6d5
FEN: r1bqkb1r/1p3ppp/p1n1pn2/3p4/2P1P3/N1N5/PP3PPP/R1BQKB1R w KQkq –

ECO: B44
Opening Name: Sicilian Defense: Taimanov Variation, Modern Line
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nb5 d6 6. c4 Nf6 7. N1c3 a6 8. Na3 Be7 9. Be2 O-O 10. O-O b6
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 d4b5 d7d6 c2c4 g8f6 b1c3 a7a6 b5a3 f8e7 f1e2 e8g8 e1g1 b7b6
FEN: r1bq1rk1/4bppp/ppnppn2/8/2P1P3/N1N5/PP2BPPP/R1BQ1RK1 w – –

ECO: B44
Opening Name: Sicilian Defense: Taimanov Variation, Szén Variation
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nb5
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 d4b5
FEN: r1bqkbnr/pp1p1ppp/2n1p3/1N6/4P3/8/PPP2PPP/RNBQKB1R b KQkq –

ECO: B45
Opening Name: Sicilian Defense: Taimanov Variation, American Attack
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Nf6 6. Ndb5 Bb4 7. Nd6+
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 b1c3 g8f6 d4b5 f8b4 b5d6
FEN: r1bqk2r/pp1p1ppp/2nNpn2/8/1b2P3/2N5/PPP2PPP/R1BQKB1R b KQkq –

ECO: B45
Opening Name: Sicilian Defense: Taimanov Variation, Normal Variation
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 b1c3
FEN: r1bqkbnr/pp1p1ppp/2n1p3/8/3NP3/2N5/PPP2PPP/R1BQKB1R b KQkq –

ECO: B46
Opening Name: Sicilian Defense: Taimanov Variation
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 a6
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 b1c3 a7a6
FEN: r1bqkbnr/1p1p1ppp/p1n1p3/8/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq –

ECO: B47
Opening Name: Sicilian Defense: Taimanov Variation, Bastrikov Variation
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 b1c3 d8c7
FEN: r1b1kbnr/ppqp1ppp/2n1p3/8/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq –

ECO: B47
Opening Name: Sicilian Defense: Taimanov Variation, Bastrikov Variation, Ponomariov Gambit
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Ndb5 Qb8 7. Be3 a6 8. Bb6
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 b1c3 d8c7 d4b5 c7b8 c1e3 a7a6 e3b6
FEN: rqb1kbnr/1p1p1ppp/pBn1p3/1N6/4P3/2N5/PPP2PPP/R2QKB1R b KQkq –

ECO: B48
Opening Name: Sicilian Defense: Taimanov Variation, Bastrikov Variation, English Attack
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be3
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 b1c3 d8c7 c1e3
FEN: r1b1kbnr/ppqp1ppp/2n1p3/8/3NP3/2N1B3/PPP2PPP/R2QKB1R b KQkq –

ECO: B49
Opening Name: Sicilian Defense: Taimanov Variation, Bastrikov Variation
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be3 a6 7. Be2
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 b1c3 d8c7 c1e3 a7a6 f1e2
FEN: r1b1kbnr/1pqp1ppp/p1n1p3/8/3NP3/2N1B3/PPP1BPPP/R2QK2R b KQkq –

ECO: B50
Opening Name: Sicilian Defense
SAN: 1. e4 c5 2. Nf3 d6 3. d4
UCI: e2e4 c7c5 g1f3 d7d6 d2d4
FEN: rnbqkbnr/pp2pppp/3p4/2p5/3PP3/5N2/PPP2PPP/RNBQKB1R b KQkq –

ECO: B50
Opening Name: Sicilian Defense
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4
FEN: rnbqkbnr/pp2pppp/3p4/8/3pP3/5N2/PPP2PPP/RNBQKB1R w KQkq –

ECO: B50
Opening Name: Sicilian Defense: Delayed Alapin Variation, Basman-Palatnik Double Gambit
SAN: 1. e4 c5 2. Nf3 d6 3. c3 Nf6 4. Be2 Nc6 5. d4 cxd4 6. cxd4 Nxe4 7. d5 Qa5+ 8. Nc3 Nxc3 9. bxc3
UCI: e2e4 c7c5 g1f3 d7d6 c2c3 g8f6 f1e2 b8c6 d2d4 c5d4 c3d4 f6e4 d4d5 d8a5 b1c3 e4c3 b2c3
FEN: r1b1kb1r/pp2pppp/2np4/q2P4/8/2P2N2/P3BPPP/R1BQK2R b KQkq –

ECO: B50
Opening Name: Sicilian Defense: Delayed Alapin Variation, Basman-Palatnik Gambit
SAN: 1. e4 c5 2. Nf3 d6 3. c3 Nf6 4. Be2 Nc6 5. d4 cxd4 6. cxd4 Nxe4
UCI: e2e4 c7c5 g1f3 d7d6 c2c3 g8f6 f1e2 b8c6 d2d4 c5d4 c3d4 f6e4
FEN: r1bqkb1r/pp2pppp/2np4/8/3Pn3/5N2/PP2BPPP/RNBQK2R w KQkq –

ECO: B50
Opening Name: Sicilian Defense: Delayed Alapin Variation, with d6
SAN: 1. e4 c5 2. Nf3 d6 3. c3
UCI: e2e4 c7c5 g1f3 d7d6 c2c3
FEN: rnbqkbnr/pp2pppp/3p4/2p5/4P3/2P2N2/PP1P1PPP/RNBQKB1R b KQkq –

ECO: B50
Opening Name: Sicilian Defense: Kopec System
SAN: 1. e4 c5 2. Nf3 d6 3. Bd3
UCI: e2e4 c7c5 g1f3 d7d6 f1d3
FEN: rnbqkbnr/pp2pppp/3p4/2p5/4P3/3B1N2/PPPP1PPP/RNBQK2R b KQkq –

ECO: B50
Opening Name: Sicilian Defense: Kotov Gambit
SAN: 1. e4 c5 2. Nf3 d6 3. g3 b5
UCI: e2e4 c7c5 g1f3 d7d6 g2g3 b7b5
FEN: rnbqkbnr/p3pppp/3p4/1pp5/4P3/5NP1/PPPP1P1P/RNBQKB1R w KQkq –

ECO: B50
Opening Name: Sicilian Defense: Modern Variations
SAN: 1. e4 c5 2. Nf3 d6
UCI: e2e4 c7c5 g1f3 d7d6
FEN: rnbqkbnr/pp2pppp/3p4/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq –

ECO: B50
Opening Name: Sicilian Defense: Modern Variations, Anti-Qxd4 Move Order
SAN: 1. e4 c5 2. Nf3 d6 3. d4 Nf6
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 g8f6
FEN: rnbqkb1r/pp2pppp/3p1n2/2p5/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq –

ECO: B50
Opening Name: Sicilian Defense: Modern Variations, Anti-Qxd4 Move Order Accepted
SAN: 1. e4 c5 2. Nf3 d6 3. d4 Nf6 4. dxc5 Nxe4
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 g8f6 d4c5 f6e4
FEN: rnbqkb1r/pp2pppp/3p4/2P5/4n3/5N2/PPP2PPP/RNBQKB1R w KQkq –

ECO: B50
Opening Name: Sicilian Defense: Modern Variations, Tartakower
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. c3
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 c2c3
FEN: rnbqkbnr/pp2pppp/3p4/8/3pP3/2P2N2/PP3PPP/RNBQKB1R b KQkq –

ECO: B50
Opening Name: Sicilian Defense: Wing Gambit, Deferred Variation
SAN: 1. e4 c5 2. Nf3 d6 3. b4
UCI: e2e4 c7c5 g1f3 d7d6 b2b4
FEN: rnbqkbnr/pp2pppp/3p4/2p5/1P2P3/5N2/P1PP1PPP/RNBQKB1R b KQkq –

ECO: B51
Opening Name: Sicilian Defense: Moscow Variation
SAN: 1. e4 c5 2. Nf3 d6 3. Bb5+
UCI: e2e4 c7c5 g1f3 d7d6 f1b5
FEN: rnbqkbnr/pp2pppp/3p4/1Bp5/4P3/5N2/PPPP1PPP/RNBQK2R b KQkq –

ECO: B51
Opening Name: Sicilian Defense: Moscow Variation, Dorfman Gambit
SAN: 1. e4 c5 2. Nf3 d6 3. Bb5+ Nc6 4. O-O Bd7 5. Qe2 g6 6. e5
UCI: e2e4 c7c5 g1f3 d7d6 f1b5 b8c6 e1g1 c8d7 d1e2 g7g6 e4e5
FEN: r2qkbnr/pp1bpp1p/2np2p1/1Bp1P3/8/5N2/PPPPQPPP/RNB2RK1 b kq –

ECO: B51
Opening Name: Sicilian Defense: Moscow Variation, Moscow Gambit
SAN: 1. e4 c5 2. Nf3 d6 3. Bb5+ Nc6 4. O-O Bd7 5. c3 Nf6 6. Re1 a6 7. Bxc6 Bxc6 8. d4 Bxe4 9. Bg5
UCI: e2e4 c7c5 g1f3 d7d6 f1b5 b8c6 e1g1 c8d7 c2c3 g8f6 f1e1 a7a6 b5c6 d7c6 d2d4 c6e4 c1g5
FEN: r2qkb1r/1p2pppp/p2p1n2/2p3B1/3Pb3/2P2N2/PP3PPP/RN1QR1K1 b kq –

ECO: B52
Opening Name: Sicilian Defense: Moscow Variation, Haag Gambit
SAN: 1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. O-O Nc6 6. c3 Nf6 7. d4
UCI: e2e4 c7c5 g1f3 d7d6 f1b5 c8d7 b5d7 d8d7 e1g1 b8c6 c2c3 g8f6 d2d4
FEN: r3kb1r/pp1qpppp/2np1n2/2p5/3PP3/2P2N2/PP3PPP/RNBQ1RK1 b kq –

ECO: B52
Opening Name: Sicilian Defense: Moscow Variation, Main Line
SAN: 1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7
UCI: e2e4 c7c5 g1f3 d7d6 f1b5 c8d7
FEN: rn1qkbnr/pp1bpppp/3p4/1Bp5/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: B52
Opening Name: Sicilian Defense: Moscow Variation, Sokolsky Variation
SAN: 1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. c4
UCI: e2e4 c7c5 g1f3 d7d6 f1b5 c8d7 b5d7 d8d7 c2c4
FEN: rn2kbnr/pp1qpppp/3p4/2p5/2P1P3/5N2/PP1P1PPP/RNBQK2R b KQkq –

ECO: B53
Opening Name: Sicilian Defense: Chekhover Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 d1d4
FEN: rnbqkbnr/pp2pppp/3p4/8/3QP3/5N2/PPP2PPP/RNB1KB1R b KQkq –

ECO: B53
Opening Name: Sicilian Defense: Chekhover Variation, Zaitsev Defense
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 Qd7
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 d1d4 b8c6 f1b5 d8d7
FEN: r1b1kbnr/pp1qpppp/2np4/1B6/3QP3/5N2/PPP2PPP/RNB1K2R w KQkq –

ECO: B54
Opening Name: Sicilian Defense: Dragon Variation, Accelerated Dragon
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 g6
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g7g6
FEN: rnbqkbnr/pp2pp1p/3p2p1/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq –

ECO: B54
Opening Name: Sicilian Defense: Modern Variations, Ginsberg Gambit
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Bc4
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 f1c4
FEN: rnbqkb1r/pp2pppp/3p1n2/8/2BNP3/8/PPP2PPP/RNBQK2R b KQkq –

ECO: B54
Opening Name: Sicilian Defense: Modern Variations, Main Line
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6
FEN: rnbqkb1r/pp2pppp/3p1n2/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq –

ECO: B54
Opening Name: Sicilian Defense: Prins Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. f3
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 f2f3
FEN: rnbqkb1r/pp2pppp/3p1n2/8/3NP3/5P2/PPP3PP/RNBQKB1R b KQkq –

ECO: B55
Opening Name: Sicilian Defense: Prins Variation, Venice Attack
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. f3 e5 6. Bb5+
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 f2f3 e7e5 f1b5
FEN: rnbqkb1r/pp3ppp/3p1n2/1B2p3/3NP3/5P2/PPP3PP/RNBQK2R b KQkq –

ECO: B56
Opening Name: Sicilian Defense: Classical Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6
FEN: r1bqkb1r/pp2pppp/2np1n2/8/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq –

ECO: B56
Opening Name: Sicilian Defense: Classical Variation, Fianchetto Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. g3
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 g2g3
FEN: r1bqkb1r/pp2pppp/2np1n2/8/3NP3/2N3P1/PPP2P1P/R1BQKB1R b KQkq –

ECO: B56
Opening Name: Sicilian Defense: Kupreichik Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Bd7
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 c8d7
FEN: rn1qkb1r/pp1bpppp/3p1n2/8/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq –

ECO: B56
Opening Name: Sicilian Defense: Spielmann Variation
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Nde2
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 d4e2
FEN: r1bqkb1r/pp2pppp/2np1n2/8/4P3/2N5/PPP1NPPP/R1BQKB1R b KQkq –

ECO: B56
Opening Name: Sicilian Defense: Venice Attack
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Bb5+
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e5 f1b5
FEN: rnbqkb1r/pp3ppp/3p1n2/1B2p3/3NP3/2N5/PPP2PPP/R1BQK2R b KQkq –

ECO: B56
Opening Name: Sicilian Defense: Yates Variation
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bd3
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1d3
FEN: r1bqkb1r/pp2pppp/2np1n2/8/3NP3/2NB4/PPP2PPP/R1BQK2R b KQkq –

ECO: B57
Opening Name: Sicilian Defense: Classical Variation, Anti-Sozin Variation
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bc4 Qb6
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1c4 d8b6
FEN: r1b1kb1r/pp2pppp/1qnp1n2/8/2BNP3/2N5/PPP2PPP/R1BQK2R w KQkq –

ECO: B57
Opening Name: Sicilian Defense: Classical Variation, Sozin Attack
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bc4
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 f1c4
FEN: r1bqkb1r/pp2pppp/2np1n2/8/2BNP3/2N5/PPP2PPP/R1BQK2R b KQkq –

ECO: B57
Opening Name: Sicilian Defense: Magnus Smith Trap
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bc4 g6 7. Nxc6 bxc6 8. e5
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1c4 g7g6 d4c6 b7c6 e4e5
FEN: r1bqkb1r/p3pp1p/2pp1np1/4P3/2B5/2N5/PPP2PPP/R1BQK2R b KQkq –

ECO: B58
Opening Name: Sicilian Defense: Boleslavsky Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Be2 e5
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 f1e2 e7e5
FEN: r1bqkb1r/pp3ppp/2np1n2/4p3/3NP3/2N5/PPP1BPPP/R1BQK2R w KQkq –

ECO: B58
Opening Name: Sicilian Defense: Boleslavsky Variation, Louma Variation
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1e2 e7e5 d4c6
FEN: r1bqkb1r/pp3ppp/2Np1n2/4p3/4P3/2N5/PPP1BPPP/R1BQK2R b KQkq –

ECO: B58
Opening Name: Sicilian Defense: Classical Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Be2
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 f1e2
FEN: r1bqkb1r/pp2pppp/2np1n2/8/3NP3/2N5/PPP1BPPP/R1BQK2R b KQkq –

ECO: B58
Opening Name: Sicilian Defense: Classical Variation, Dragon Transfer
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Be2 Nxd4 7. Qxd4 g6
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 f1e2 c6d4 d1d4 g7g6
FEN: r1bqkb1r/pp2pp1p/3p1np1/8/3QP3/2N5/PPP1BPPP/R1B1K2R w KQkq –

ECO: B59
Opening Name: Sicilian Defense: Boleslavsky Variation
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nb3
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1e2 e7e5 d4b3
FEN: r1bqkb1r/pp3ppp/2np1n2/4p3/4P3/1NN5/PPP1BPPP/R1BQK2R b KQkq –

ECO: B60
Opening Name: Sicilian Defense: Richter-Rauzer Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5
FEN: r1bqkb1r/pp2pppp/2np1n2/6B1/3NP3/2N5/PPP2PPP/R2QKB1R b KQkq –

ECO: B60
Opening Name: Sicilian Defense: Richter-Rauzer Variation, Dragon Variation
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 g6
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 c1g5 g7g6
FEN: r1bqkb1r/pp2pp1p/2np1np1/6B1/3NP3/2N5/PPP2PPP/R2QKB1R w KQkq –

ECO: B60
Opening Name: Sicilian Defense: Richter-Rauzer Variation, Modern Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 Bd7
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 c8d7
FEN: r2qkb1r/pp1bpppp/2np1n2/6B1/3NP3/2N5/PPP2PPP/R2QKB1R w KQkq –

ECO: B61
Opening Name: Sicilian Defense: Richter-Rauzer Variation, Modern Variation
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 Bd7 7. Qd2
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 c1g5 c8d7 d1d2
FEN: r2qkb1r/pp1bpppp/2np1n2/6B1/3NP3/2N5/PPPQ1PPP/R3KB1R b KQkq –

ECO: B62
Opening Name: Sicilian Defense: Richter-Rauzer Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6
FEN: r1bqkb1r/pp3ppp/2nppn2/6B1/3NP3/2N5/PPP2PPP/R2QKB1R w KQkq –

ECO: B62
Opening Name: Sicilian Defense: Richter-Rauzer Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd3
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 d1d3
FEN: r1bqkb1r/pp3ppp/2nppn2/6B1/3NP3/2NQ4/PPP2PPP/R3KB1R b KQkq –

ECO: B62
Opening Name: Sicilian Defense: Richter-Rauzer Variation, Exchange Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Nxc6
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 d4c6
FEN: r1bqkb1r/pp3ppp/2Nppn2/6B1/4P3/2N5/PPP2PPP/R2QKB1R b KQkq –

ECO: B62
Opening Name: Sicilian Defense: Richter-Rauzer Variation, Podebrady Variation
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 e6 7. Nb3
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 c1g5 e7e6 d4b3
FEN: r1bqkb1r/pp3ppp/2nppn2/6B1/4P3/1NN5/PPP2PPP/R2QKB1R b KQkq –

ECO: B62
Opening Name: Sicilian Defense: Richter-Rauzer Variation, Vitolins Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Bb5
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 f1b5
FEN: r1bqkb1r/pp3ppp/2nppn2/1B4B1/3NP3/2N5/PPP2PPP/R2QK2R b KQkq –

ECO: B63
Opening Name: Sicilian Defense: Richter-Rauzer Variation, Classical Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 Be7
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 d1d2 f8e7
FEN: r1bqk2r/pp2bppp/2nppn2/6B1/3NP3/2N5/PPPQ1PPP/R3KB1R w KQkq –

ECO: B63
Opening Name: Sicilian Defense: Richter-Rauzer Variation, Classical Variation, Kantscher Line
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 Be7 8. O-O-O Nxd4 9. Qxd4 a6 10. f4 b5
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 d1d2 f8e7 e1c1 c6d4 d2d4 a7a6 f2f4 b7b5
FEN: r1bqk2r/4bppp/p2ppn2/1p4B1/3QPP2/2N5/PPP3PP/2KR1B1R w kq –

ECO: B63
Opening Name: Sicilian Defense: Richter-Rauzer Variation, Ivanov Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 Qb6
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 d1d2 d8b6
FEN: r1b1kb1r/pp3ppp/1qnppn2/6B1/3NP3/2N5/PPPQ1PPP/R3KB1R w KQkq –

ECO: B63
Opening Name: Sicilian Defense: Richter-Rauzer Variation, Traditional Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 d1d2
FEN: r1bqkb1r/pp3ppp/2nppn2/6B1/3NP3/2N5/PPPQ1PPP/R3KB1R b KQkq –

ECO: B64
Opening Name: Sicilian Defense: Richter-Rauzer Variation, Classical Variation
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 e6 7. Qd2 Be7 8. O-O-O O-O 9. f4 e5
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 c1g5 e7e6 d1d2 f8e7 e1c1 e8g8 f2f4 e6e5
FEN: r1bq1rk1/pp2bppp/2np1n2/4p1B1/3NPP2/2N5/PPPQ2PP/2KR1B1R w – –

ECO: B64
Opening Name: Sicilian Defense: Richter-Rauzer Variation, Classical Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 Be7 8. O-O-O O-O 9. f4
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 d1d2 f8e7 e1c1 e8g8 f2f4
FEN: r1bq1rk1/pp2bppp/2nppn2/6B1/3NPP2/2N5/PPPQ2PP/2KR1B1R b – –

ECO: B65
Opening Name: Sicilian Defense: Richter-Rauzer Variation, Classical Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 Be7 8. O-O-O O-O 9. f4 Nxd4 10. Qxd4
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 d1d2 f8e7 e1c1 e8g8 f2f4 c6d4 d2d4
FEN: r1bq1rk1/pp2bppp/3ppn2/6B1/3QPP2/2N5/PPP3PP/2KR1B1R b – –

ECO: B65
Opening Name: Sicilian Defense: Richter-Rauzer Variation, Rauzer Attack
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 Be7 8. O-O-O O-O 9. f4 Nxd4
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 d1d2 f8e7 e1c1 e8g8 f2f4 c6d4
FEN: r1bq1rk1/pp2bppp/3ppn2/6B1/3nPP2/2N5/PPPQ2PP/2KR1B1R w – –

ECO: B66
Opening Name: Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation, Early Deviations
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 a6
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 d1d2 a7a6
FEN: r1bqkb1r/1p3ppp/p1nppn2/6B1/3NP3/2N5/PPPQ1PPP/R3KB1R w KQkq –

ECO: B67
Opening Name: Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 e6 7. Qd2 a6 8. O-O-O Bd7
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 c1g5 e7e6 d1d2 a7a6 e1c1 c8d7
FEN: r2qkb1r/1p1b1ppp/p1nppn2/6B1/3NP3/2N5/PPPQ1PPP/2KR1B1R w kq –

ECO: B68
Opening Name: Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 e6 7. Qd2 a6 8. O-O-O Bd7 9. f4 Be7
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 c1g5 e7e6 d1d2 a7a6 e1c1 c8d7 f2f4 f8e7
FEN: r2qk2r/1p1bbppp/p1nppn2/6B1/3NPP2/2N5/PPPQ2PP/2KR1B1R w kq –

ECO: B69
Opening Name: Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation, Nyezhmetdinov Attack
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 e6 7. Qd2 a6 8. O-O-O Bd7 9. f4 Be7 10. Nf3 b5 11. Bxf6
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 c1g5 e7e6 d1d2 a7a6 e1c1 c8d7 f2f4 f8e7 d4f3 b7b5 g5f6
FEN: r2qk2r/3bbppp/p1nppB2/1p6/4PP2/2N2N2/PPPQ2PP/2KR1B1R b kq –

ECO: B70
Opening Name: Sicilian Defense: Dragon Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6
FEN: rnbqkb1r/pp2pp1p/3p1np1/8/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq –

ECO: B70
Opening Name: Sicilian Defense: Dragon Variation, Classical Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be2
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 f1e2
FEN: rnbqkb1r/pp2pp1p/3p1np1/8/3NP3/2N5/PPP1BPPP/R1BQK2R b KQkq –

ECO: B70
Opening Name: Sicilian Defense: Dragon Variation, Fianchetto Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. g3
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 g2g3
FEN: rnbqkb1r/pp2pp1p/3p1np1/8/3NP3/2N3P1/PPP2P1P/R1BQKB1R b KQkq –

ECO: B71
Opening Name: Sicilian Defense: Dragon Variation, Levenfish Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. f4
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 f2f4
FEN: rnbqkb1r/pp2pp1p/3p1np1/8/3NPP2/2N5/PPP3PP/R1BQKB1R b KQkq –

ECO: B71
Opening Name: Sicilian Defense: Dragon Variation, Levenfish Variation, Main Line
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. f4 Nbd7
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 f2f4 b8d7
FEN: r1bqkb1r/pp1npp1p/3p1np1/8/3NPP2/2N5/PPP3PP/R1BQKB1R w KQkq –

ECO: B72
Opening Name: Sicilian Defense: Dragon Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3
FEN: rnbqkb1r/pp2pp1p/3p1np1/8/3NP3/2N1B3/PPP2PPP/R2QKB1R b KQkq –

ECO: B72
Opening Name: Sicilian Defense: Dragon Variation, Classical Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f1e2
FEN: rnbqk2r/pp2ppbp/3p1np1/8/3NP3/2N1B3/PPP1BPPP/R2QK2R b KQkq –

ECO: B72
Opening Name: Sicilian Defense: Dragon Variation, Classical Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 Nc6
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f1e2 b8c6
FEN: r1bqk2r/pp2ppbp/2np1np1/8/3NP3/2N1B3/PPP1BPPP/R2QK2R w KQkq –

ECO: B72
Opening Name: Sicilian Defense: Dragon Variation, Classical Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 Nc6 8. Nb3
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f1e2 b8c6 d4b3
FEN: r1bqk2r/pp2ppbp/2np1np1/8/4P3/1NN1B3/PPP1BPPP/R2QK2R b KQkq –

ECO: B72
Opening Name: Sicilian Defense: Dragon Variation, Classical Variation, Amsterdam Variation
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 g6 7. Be3 Bg7 8. Qd2
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1e2 g7g6 c1e3 f8g7 d1d2
FEN: r1bqk2r/pp2ppbp/2np1np1/8/3NP3/2N1B3/PPPQBPPP/R3K2R b KQkq –

ECO: B72
Opening Name: Sicilian Defense: Dragon Variation, Classical Variation, Grigoriev Variation
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 g6 7. Be3 Bg7 8. Qd2 O-O 9. O-O-O
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1e2 g7g6 c1e3 f8g7 d1d2 e8g8 e1c1
FEN: r1bq1rk1/pp2ppbp/2np1np1/8/3NP3/2N1B3/PPPQBPPP/2KR3R b – –

ECO: B73
Opening Name: Sicilian Defense: Dragon Variation, Classical Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be2 Bg7 7. O-O Nc6 8. Be3
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 f1e2 f8g7 e1g1 b8c6 c1e3
FEN: r1bqk2r/pp2ppbp/2np1np1/8/3NP3/2N1B3/PPP1BPPP/R2Q1RK1 b kq –

ECO: B73
Opening Name: Sicilian Defense: Dragon Variation, Classical Variation, Battery Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be2 Bg7 7. O-O O-O 8. Be3 Nc6 9. Qd2
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 f1e2 f8g7 e1g1 e8g8 c1e3 b8c6 d1d2
FEN: r1bq1rk1/pp2ppbp/2np1np1/8/3NP3/2N1B3/PPPQBPPP/R4RK1 b – –

ECO: B73
Opening Name: Sicilian Defense: Dragon Variation, Classical Variation, Zollner Gambit
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Be3 Bg7 6. Be2 Nf6 7. Nc3 O-O 8. O-O d6 9. f4 Qb6 10. e5
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 c1e3 f8g7 f1e2 g8f6 b1c3 e8g8 e1g1 d7d6 f2f4 d8b6 e4e5
FEN: r1b2rk1/pp2ppbp/1qnp1np1/4P3/3N1P2/2N1B3/PPP1B1PP/R2Q1RK1 b – –

ECO: B74
Opening Name: Sicilian Defense: Dragon Variation, Classical Variation, Alekhine Line
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 Nf6 7. Be2 O-O 8. O-O d6 9. Nb3 a5
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 b1c3 f8g7 c1e3 g8f6 f1e2 e8g8 e1g1 d7d6 d4b3 a7a5
FEN: r1bq1rk1/1p2ppbp/2np1np1/p7/4P3/1NN1B3/PPP1BPPP/R2Q1RK1 w – –

ECO: B74
Opening Name: Sicilian Defense: Dragon Variation, Classical Variation, Bernard Defense
SAN: 1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 Bg7 7. O-O O-O 8. Be3 Nc6 9. Nb3 Be6 10. f4 Na5 11. f5 Bc4 12. Bd3 Bxd3 13. cxd3 d5
UCI: e2e4 c7c5 g1f3 g7g6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1e2 f8g7 e1g1 e8g8 c1e3 b8c6 d4b3 c8e6 f2f4 c6a5 f4f5 e6c4 e2d3 c4d3 c2d3 d6d5
FEN: r2q1rk1/pp2ppbp/5np1/n2p1P2/4P3/1NNPB3/PP4PP/R2Q1RK1 w – –

ECO: B74
Opening Name: Sicilian Defense: Dragon Variation, Classical Variation, Maróczy Line
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be2 Bg7 7. O-O O-O 8. Be3 Nc6 9. Nb3 Be6 10. f4 Na5
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 f1e2 f8g7 e1g1 e8g8 c1e3 b8c6 d4b3 c8e6 f2f4 c6a5
FEN: r2q1rk1/pp2ppbp/3pbnp1/n7/4PP2/1NN1B3/PPP1B1PP/R2Q1RK1 w – –

ECO: B74
Opening Name: Sicilian Defense: Dragon Variation, Classical Variation, Normal Line
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be2 Bg7 7. O-O O-O 8. Be3 Nc6 9. Nb3
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 f1e2 f8g7 e1g1 e8g8 c1e3 b8c6 d4b3
FEN: r1bq1rk1/pp2ppbp/2np1np1/8/4P3/1NN1B3/PPP1BPPP/R2Q1RK1 b – –

ECO: B74
Opening Name: Sicilian Defense: Dragon Variation, Classical Variation, Spielmann Variation
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 Nf6 7. Be2 O-O 8. Nb3 d6 9. O-O Be6 10. f4 Na5 11. f5 Bc4 12. Bd3
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 b1c3 f8g7 c1e3 g8f6 f1e2 e8g8 d4b3 d7d6 e1g1 c8e6 f2f4 c6a5 f4f5 e6c4 e2d3
FEN: r2q1rk1/pp2ppbp/3p1np1/n4P2/2b1P3/1NNBB3/PPP3PP/R2Q1RK1 b – –

ECO: B74
Opening Name: Sicilian Defense: Dragon Variation, Classical Variation, Stockholm Attack
SAN: 1. e4 c5 2. Nc3 d6 3. f4 Nc6 4. Nf3 g6 5. d4 cxd4 6. Nxd4 Bg7 7. Be3 Nf6 8. Be2 O-O 9. Nb3 Be6 10. O-O Na5 11. f5 Bc4 12. Nxa5 Bxe2 13. Qxe2 Qxa5 14. g4
UCI: e2e4 c7c5 b1c3 d7d6 f2f4 b8c6 g1f3 g7g6 d2d4 c5d4 f3d4 f8g7 c1e3 g8f6 f1e2 e8g8 d4b3 c8e6 e1g1 c6a5 f4f5 e6c4 b3a5 c4e2 d1e2 d8a5 g2g4
FEN: r4rk1/pp2ppbp/3p1np1/q4P2/4P1P1/2N1B3/PPP1Q2P/R4RK1 b – –

ECO: B74
Opening Name: Sicilian Defense: Dragon Variation, Classical Variation, Tartakower Line
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be2 Bg7 7. O-O O-O 8. Be3 Nc6 9. Nb3 Be6 10. f4 Qc8
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 f1e2 f8g7 e1g1 e8g8 c1e3 b8c6 d4b3 c8e6 f2f4 d8c8
FEN: r1q2rk1/pp2ppbp/2npbnp1/8/4PP2/1NN1B3/PPP1B1PP/R2Q1RK1 w – –

ECO: B75
Opening Name: Sicilian Defense: Dragon Variation, Yugoslav Attack, Belezky Line
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 Nc6
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 b8c6
FEN: r1bqk2r/pp2ppbp/2np1np1/8/3NP3/2N1BP2/PPP3PP/R2QKB1R w KQkq –

ECO: B75
Opening Name: Sicilian Defense: Dragon Variation, Yugoslav Attack, Early Deviations
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3
FEN: rnbqk2r/pp2ppbp/3p1np1/8/3NP3/2N1BP2/PPP3PP/R2QKB1R b KQkq –

ECO: B76
Opening Name: Sicilian Defense: Dragon Variation, Yugoslav Attack
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 e8g8
FEN: rnbq1rk1/pp2ppbp/3p1np1/8/3NP3/2N1BP2/PPP3PP/R2QKB1R w KQ –

ECO: B76
Opening Name: Sicilian Defense: Dragon Variation, Yugoslav Attack
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2 Nc6
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 e8g8 d1d2 b8c6
FEN: r1bq1rk1/pp2ppbp/2np1np1/8/3NP3/2N1BP2/PPPQ2PP/R3KB1R w KQ –

ECO: B76
Opening Name: Sicilian Defense: Dragon Variation, Yugoslav Attack, Modern Line
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 Nc6 8. Qd2 O-O 9. O-O-O
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 b8c6 d1d2 e8g8 e1c1
FEN: r1bq1rk1/pp2ppbp/2np1np1/8/3NP3/2N1BP2/PPPQ2PP/2KR1B1R b – –

ECO: B76
Opening Name: Sicilian Defense: Dragon Variation, Yugoslav Attack, Panov Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2 Nc6 9. g4
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 e8g8 d1d2 b8c6 g2g4
FEN: r1bq1rk1/pp2ppbp/2np1np1/8/3NP1P1/2N1BP2/PPPQ3P/R3KB1R b KQ –

ECO: B77
Opening Name: Sicilian Defense: Dragon Variation, Yugoslav Attack
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2 Nc6 9. Bc4 Bd7
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 e8g8 d1d2 b8c6 f1c4 c8d7
FEN: r2q1rk1/pp1bppbp/2np1np1/8/2BNP3/2N1BP2/PPPQ2PP/R3K2R w KQ –

ECO: B77
Opening Name: Sicilian Defense: Dragon Variation, Yugoslav Attack, Byrne Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2 Nc6 9. Bc4 a5
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 e8g8 d1d2 b8c6 f1c4 a7a5
FEN: r1bq1rk1/1p2ppbp/2np1np1/p7/2BNP3/2N1BP2/PPPQ2PP/R3K2R w KQ –

ECO: B77
Opening Name: Sicilian Defense: Dragon Variation, Yugoslav Attack, Czerniak Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 Nc6 8. Qd2 O-O 9. Bc4 Nxd4 10. Bxd4 Be6
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 b8c6 d1d2 e8g8 f1c4 c6d4 e3d4 c8e6
FEN: r2q1rk1/pp2ppbp/3pbnp1/8/2BBP3/2N2P2/PPPQ2PP/R3K2R w KQ –

ECO: B77
Opening Name: Sicilian Defense: Dragon Variation, Yugoslav Attack, Main Line
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2 Nc6 9. Bc4
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 e8g8 d1d2 b8c6 f1c4
FEN: r1bq1rk1/pp2ppbp/2np1np1/8/2BNP3/2N1BP2/PPPQ2PP/R3K2R b KQ –

ECO: B77
Opening Name: Sicilian Defense: Dragon Variation, Yugoslav Attack, Sosonko Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 Nc6 8. Qd2 O-O 9. Bc4 Nd7
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 b8c6 d1d2 e8g8 f1c4 f6d7
FEN: r1bq1rk1/pp1nppbp/2np2p1/8/2BNP3/2N1BP2/PPPQ2PP/R3K2R w KQ –

ECO: B78
Opening Name: Sicilian Defense: Dragon Variation, Yugoslav Attack
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2 Nc6 9. Bc4 Bd7 10. O-O-O
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 e8g8 d1d2 b8c6 f1c4 c8d7 e1c1
FEN: r2q1rk1/pp1bppbp/2np1np1/8/2BNP3/2N1BP2/PPPQ2PP/2KR3R b – –

ECO: B78
Opening Name: Sicilian Defense: Dragon Variation, Yugoslav Attack, Old Line
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2 Nc6 9. Bc4 Bd7 10. O-O-O Rc8
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 e8g8 d1d2 b8c6 f1c4 c8d7 e1c1 a8c8
FEN: 2rq1rk1/pp1bppbp/2np1np1/8/2BNP3/2N1BP2/PPPQ2PP/2KR3R w – –

ECO: B79
Opening Name: Sicilian Defense: Dragon Variation, Yugoslav Attack
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2 Nc6 9. Bc4 Bd7 10. h4 Qa5 11. O-O-O Rfc8 12. Bb3
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 e8g8 d1d2 b8c6 f1c4 c8d7 h2h4 d8a5 e1c1 f8c8 c4b3
FEN: r1r3k1/pp1bppbp/2np1np1/q7/3NP2P/1BN1BP2/PPPQ2P1/2KR3R b – –

ECO: B79
Opening Name: Sicilian Defense: Dragon Variation, Yugoslav Attack, Soltis Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2 Nc6 9. Bc4 Bd7 10. O-O-O Qa5 11. h4 Rfc8 12. Bb3 h5
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 e8g8 d1d2 b8c6 f1c4 c8d7 e1c1 d8a5 h2h4 f8c8 c4b3 h7h5
FEN: r1r3k1/pp1bppb1/2np1np1/q6p/3NP2P/1BN1BP2/PPPQ2P1/2KR3R w – –

ECO: B80
Opening Name: Sicilian Defense: Scheveningen Variation
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6
FEN: rnbqkb1r/pp3ppp/3ppn2/8/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq –

ECO: B80
Opening Name: Sicilian Defense: Scheveningen Variation, English Attack, with Qd2
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e6 7. Qd2
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1e3 e7e6 d1d2
FEN: rnbqkb1r/1p3ppp/p2ppn2/8/3NP3/2N1B3/PPPQ1PPP/R3KB1R b KQkq –

ECO: B80
Opening Name: Sicilian Defense: Scheveningen Variation, Fianchetto Variation
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. g3
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 g2g3
FEN: rnbqkb1r/pp3ppp/3ppn2/8/3NP3/2N3P1/PPP2P1P/R1BQKB1R b KQkq –

ECO: B80
Opening Name: Sicilian Defense: Scheveningen Variation, Vitolins Variation
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bb5+
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1b5
FEN: rnbqkb1r/pp3ppp/3ppn2/1B6/3NP3/2N5/PPP2PPP/R1BQK2R b KQkq –

ECO: B81
Opening Name: Sicilian Defense: Scheveningen Variation, Keres Attack
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. g4
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 g2g4
FEN: rnbqkb1r/pp3ppp/3ppn2/8/3NP1P1/2N5/PPP2P1P/R1BQKB1R b KQkq –

ECO: B82
Opening Name: Sicilian Defense: Scheveningen Variation, Matanovic Attack
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. f4
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f2f4
FEN: rnbqkb1r/pp3ppp/3ppn2/8/3NPP2/2N5/PPP3PP/R1BQKB1R b KQkq –

ECO: B82
Opening Name: Sicilian Defense: Scheveningen Variation, Tal Variation
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. f4 Nc6 7. Be3 Be7 8. Qf3
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f2f4 b8c6 c1e3 f8e7 d1f3
FEN: r1bqk2r/pp2bppp/2nppn2/8/3NPP2/2N1BQ2/PPP3PP/R3KB1R b KQkq –

ECO: B83
Opening Name: Sicilian Defense: Scheveningen Variation, Classical Variation
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1e2
FEN: rnbqkb1r/pp3ppp/3ppn2/8/3NP3/2N5/PPP1BPPP/R1BQK2R b KQkq –

ECO: B83
Opening Name: Sicilian Defense: Scheveningen Variation, Modern Variation
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 d6 6. Be2 Nf6
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 b1c3 d7d6 f1e2 g8f6
FEN: r1bqkb1r/pp3ppp/2nppn2/8/3NP3/2N5/PPP1BPPP/R1BQK2R w KQkq –

ECO: B83
Opening Name: Sicilian Defense: Scheveningen Variation, Modern Variation
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 Be7 7. O-O O-O 8. f4 Nc6 9. Be3
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1e2 f8e7 e1g1 e8g8 f2f4 b8c6 c1e3
FEN: r1bq1rk1/pp2bppp/2nppn2/8/3NPP2/2N1B3/PPP1B1PP/R2Q1RK1 b – –

ECO: B83
Opening Name: Sicilian Defense: Scheveningen Variation, Modern Variation
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 Be7 7. O-O O-O 8. f4 Nc6 9. Be3 Bd7 10. Nb3
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1e2 f8e7 e1g1 e8g8 f2f4 b8c6 c1e3 c8d7 d4b3
FEN: r2q1rk1/pp1bbppp/2nppn2/8/4PP2/1NN1B3/PPP1B1PP/R2Q1RK1 b – –

ECO: B84
Opening Name: Sicilian Defense: Najdorf Variation, Scheveningen Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e6 7. O-O Nbd7
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 f1e2 e7e6 e1g1 b8d7
FEN: r1bqkb1r/1p1n1ppp/p2ppn2/8/3NP3/2N5/PPP1BPPP/R1BQ1RK1 w kq –

ECO: B84
Opening Name: Sicilian Defense: Scheveningen Variation, Classical Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e6
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 f1e2 e7e6
FEN: rnbqkb1r/1p3ppp/p2ppn2/8/3NP3/2N5/PPP1BPPP/R1BQK2R w KQkq –

ECO: B84
Opening Name: Sicilian Defense: Scheveningen Variation, Classical Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e6 7. O-O Qc7
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 f1e2 e7e6 e1g1 d8c7
FEN: rnb1kb1r/1pq2ppp/p2ppn2/8/3NP3/2N5/PPP1BPPP/R1BQ1RK1 w kq –

ECO: B85
Opening Name: Sicilian Defense: Scheveningen Variation, Classical Main Line
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be2 a6 7. O-O Nf6 8. Be3 Be7 9. f4 d6 10. Qe1 O-O
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 b1c3 d8c7 f1e2 a7a6 e1g1 g8f6 c1e3 f8e7 f2f4 d7d6 d1e1 e8g8
FEN: r1b2rk1/1pq1bppp/p1nppn2/8/3NPP2/2N1B3/PPP1B1PP/R3QRK1 w – –

ECO: B85
Opening Name: Sicilian Defense: Scheveningen Variation, Classical Variation, Paulsen Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f4 e6 7. Be2 Qc7 8. O-O Nc6
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 f2f4 e7e6 f1e2 d8c7 e1g1 b8c6
FEN: r1b1kb1r/1pq2ppp/p1nppn2/8/3NPP2/2N5/PPP1B1PP/R1BQ1RK1 w kq –

ECO: B85
Opening Name: Sicilian Defense: Scheveningen Variation, Classical Variation, Paulsen Variation
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be2 a6 7. O-O Nf6 8. Be3 d6 9. f4
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 b1c3 d8c7 f1e2 a7a6 e1g1 g8f6 c1e3 d7d6 f2f4
FEN: r1b1kb1r/1pq2ppp/p1nppn2/8/3NPP2/2N1B3/PPP1B1PP/R2Q1RK1 b kq –

ECO: B85
Opening Name: Sicilian Defense: Scheveningen Variation, Classical Variation, Paulsen Variation
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be2 a6 7. O-O Nf6 8. Kh1 Be7 9. f4 d6 10. a4
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 b1c3 d8c7 f1e2 a7a6 e1g1 g8f6 g1h1 f8e7 f2f4 d7d6 a2a4
FEN: r1b1k2r/1pq1bppp/p1nppn2/8/P2NPP2/2N5/1PP1B1PP/R1BQ1R1K b kq –

ECO: B86
Opening Name: Sicilian Defense: Sozin Attack
SAN: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bc4
UCI: e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1c4
FEN: rnbqkb1r/pp3ppp/3ppn2/8/2BNP3/2N5/PPP2PPP/R1BQK2R b KQkq –

ECO: B87
Opening Name: Sicilian Defense: Sozin Attack, Flank Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bc4 e6 7. Bb3 b5
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 f1c4 e7e6 c4b3 b7b5
FEN: rnbqkb1r/5ppp/p2ppn2/1p6/3NP3/1BN5/PPP2PPP/R1BQK2R w KQkq –

ECO: B88
Opening Name: Sicilian Defense: Sozin Attack, Fischer Variation
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bc4 e6 7. Bb3 Be7 8. Be3 O-O 9. f4
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1c4 e7e6 c4b3 f8e7 c1e3 e8g8 f2f4
FEN: r1bq1rk1/pp2bppp/2nppn2/8/3NPP2/1BN1B3/PPP3PP/R2QK2R b KQ –

ECO: B88
Opening Name: Sicilian Defense: Sozin Attack, Leonhardt Variation
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bc4 e6
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1c4 e7e6
FEN: r1bqkb1r/pp3ppp/2nppn2/8/2BNP3/2N5/PPP2PPP/R1BQK2R w KQkq –

ECO: B89
Opening Name: Sicilian Defense: Sozin Attack, Main Line
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bc4 e6 7. Be3
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1c4 e7e6 c1e3
FEN: r1bqkb1r/pp3ppp/2nppn2/8/2BNP3/2N1B3/PPP2PPP/R2QK2R b KQkq –

ECO: B89
Opening Name: Sicilian Defense: Sozin Attack, Main Line, Sherbakov Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bc4 e6 7. Be3 Be7 8. Bb3 O-O 9. O-O Na5 10. f4 b6
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 f1c4 e7e6 c1e3 f8e7 c4b3 e8g8 e1g1 c6a5 f2f4 b7b6
FEN: r1bq1rk1/p3bppp/1p1ppn2/n7/3NPP2/1BN1B3/PPP3PP/R2Q1RK1 w – –

ECO: B89
Opening Name: Sicilian Defense: Velimirovic Attack
SAN: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bc4 e6 7. Be3 Be7 8. Qe2
UCI: e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1c4 e7e6 c1e3 f8e7 d1e2
FEN: r1bqk2r/pp2bppp/2nppn2/8/2BNP3/2N1B3/PPP1QPPP/R3K2R b KQkq –

ECO: B90
Opening Name: Sicilian Defense: Najdorf Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6
FEN: rnbqkb1r/1p2pppp/p2p1n2/8/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq –

ECO: B90
Opening Name: Sicilian Defense: Najdorf Variation, Adams Attack
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. h3
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 h2h3
FEN: rnbqkb1r/1p2pppp/p2p1n2/8/3NP3/2N4P/PPP2PP1/R1BQKB1R b KQkq –

ECO: B90
Opening Name: Sicilian Defense: Najdorf Variation, Dekker Gambit
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g4
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 g2g4
FEN: rnbqkb1r/1p2pppp/p2p1n2/8/3NP1P1/2N5/PPP2P1P/R1BQKB1R b KQkq –

ECO: B90
Opening Name: Sicilian Defense: Najdorf Variation, English Attack
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1e3
FEN: rnbqkb1r/1p2pppp/p2p1n2/8/3NP3/2N1B3/PPP2PPP/R2QKB1R b KQkq –

ECO: B90
Opening Name: Sicilian Defense: Najdorf Variation, English Attack, Anti-English
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 Ng4
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1e3 f6g4
FEN: rnbqkb1r/1p2pppp/p2p4/8/3NP1n1/2N1B3/PPP2PPP/R2QKB1R w KQkq –

ECO: B90
Opening Name: Sicilian Defense: Najdorf Variation, Freak Attack
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Rg1
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 h1g1
FEN: rnbqkb1r/1p2pppp/p2p1n2/8/3NP3/2N5/PPP2PPP/R1BQKBR1 b Qkq –

ECO: B90
Opening Name: Sicilian Defense: Najdorf Variation, Lipnitsky Attack
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bc4
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 f1c4
FEN: rnbqkb1r/1p2pppp/p2p1n2/8/2BNP3/2N5/PPP2PPP/R1BQK2R b KQkq –

ECO: B90
Opening Name: Sicilian Defense: Scheveningen Variation, Delayed Keres Attack
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e6 7. g4
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1e3 e7e6 g2g4
FEN: rnbqkb1r/1p3ppp/p2ppn2/8/3NP1P1/2N1B3/PPP2P1P/R2QKB1R b KQkq –

ECO: B90
Opening Name: Sicilian Defense: Scheveningen Variation, Delayed Keres Attack, Perenyi Gambit
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e6 7. g4 e5 8. Nf5 g6 9. g5
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1e3 e7e6 g2g4 e6e5 d4f5 g7g6 g4g5
FEN: rnbqkb1r/1p3p1p/p2p1np1/4pNP1/4P3/2N1B3/PPP2P1P/R2QKB1R b KQkq –

ECO: B90
Opening Name: Sicilian Defense: Scheveningen Variation, English Attack, with f3
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e6 7. f3
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1e3 e7e6 f2f3
FEN: rnbqkb1r/1p3ppp/p2ppn2/8/3NP3/2N1BP2/PPP3PP/R2QKB1R b KQkq –

ECO: B91
Opening Name: Sicilian Defense: Najdorf Variation, Zagreb Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 g2g3
FEN: rnbqkb1r/1p2pppp/p2p1n2/8/3NP3/2N3P1/PPP2P1P/R1BQKB1R b KQkq –

ECO: B92
Opening Name: Sicilian Defense: Najdorf Variation, Opocensky Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 f1e2
FEN: rnbqkb1r/1p2pppp/p2p1n2/8/3NP3/2N5/PPP1BPPP/R1BQK2R b KQkq –

ECO: B92
Opening Name: Sicilian Defense: Najdorf Variation, Opocensky Variation
SAN: 1. e4 c5 2. Nf3 Nf6 3. Nc3 d6 4. d4 cxd4 5. Nxd4 a6 6. Be2 e5 7. Nb3 Be6 8. Be3
UCI: e2e4 c7c5 g1f3 g8f6 b1c3 d7d6 d2d4 c5d4 f3d4 a7a6 f1e2 e7e5 d4b3 c8e6 c1e3
FEN: rn1qkb1r/1p3ppp/p2pbn2/4p3/4P3/1NN1B3/PPP1BPPP/R2QK2R b KQkq –

ECO: B92
Opening Name: Sicilian Defense: Najdorf Variation, Opocensky Variation, Modern Line
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be7 8. O-O Be6
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 f1e2 e7e5 d4b3 f8e7 e1g1 c8e6
FEN: rn1qk2r/1p2bppp/p2pbn2/4p3/4P3/1NN5/PPP1BPPP/R1BQ1RK1 w kq –

ECO: B92
Opening Name: Sicilian Defense: Najdorf Variation, Opocensky Variation, Traditional Line
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be7 8. O-O O-O
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 f1e2 e7e5 d4b3 f8e7 e1g1 e8g8
FEN: rnbq1rk1/1p2bppp/p2p1n2/4p3/4P3/1NN5/PPP1BPPP/R1BQ1RK1 w – –

ECO: B93
Opening Name: Sicilian Defense: Najdorf Variation, Amsterdam Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f4
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 f2f4
FEN: rnbqkb1r/1p2pppp/p2p1n2/8/3NPP2/2N5/PPP3PP/R1BQKB1R b KQkq –

ECO: B94
Opening Name: Sicilian Defense: Najdorf Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5
FEN: rnbqkb1r/1p2pppp/p2p1n2/6B1/3NP3/2N5/PPP2PPP/R2QKB1R b KQkq –

ECO: B94
Opening Name: Sicilian Defense: Najdorf Variation, Ivkov Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 Nbd7 7. Bc4 Qa5 8. Qd2 e6 9. O-O-O b5 10. Bb3 Bb7 11. Rhe1 Nc5 12. e5
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5 b8d7 f1c4 d8a5 d1d2 e7e6 e1c1 b7b5 c4b3 c8b7 h1e1 d7c5 e4e5
FEN: r3kb1r/1b3ppp/p2ppn2/qpn1P1B1/3N4/1BN5/PPPQ1PPP/2KRR3 b kq –

ECO: B95
Opening Name: Sicilian Defense: Najdorf Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5 e7e6
FEN: rnbqkb1r/1p3ppp/p2ppn2/6B1/3NP3/2N5/PPP2PPP/R2QKB1R w KQkq –

ECO: B96
Opening Name: Sicilian Defense: Najdorf Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5 e7e6 f2f4
FEN: rnbqkb1r/1p3ppp/p2ppn2/6B1/3NPP2/2N5/PPP3PP/R2QKB1R b KQkq –

ECO: B96
Opening Name: Sicilian Defense: Najdorf Variation, Neo-Classical Defense
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Nc6
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5 e7e6 f2f4 b8c6
FEN: r1bqkb1r/1p3ppp/p1nppn2/6B1/3NPP2/2N5/PPP3PP/R2QKB1R w KQkq –

ECO: B96
Opening Name: Sicilian Defense: Najdorf Variation, Polugaevsky Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 b5
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5 e7e6 f2f4 b7b5
FEN: rnbqkb1r/5ppp/p2ppn2/1p4B1/3NPP2/2N5/PPP3PP/R2QKB1R w KQkq –

ECO: B96
Opening Name: Sicilian Defense: Najdorf Variation, Polugaevsky Variation, Simagin Line
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 b5 8. e5 dxe5 9. fxe5 Qc7 10. Qe2
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5 e7e6 f2f4 b7b5 e4e5 d6e5 f4e5 d8c7 d1e2
FEN: rnb1kb1r/2q2ppp/p3pn2/1p2P1B1/3N4/2N5/PPP1Q1PP/R3KB1R b KQkq –

ECO: B97
Opening Name: Sicilian Defense: Najdorf Variation, Poisoned Pawn Accepted
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Qb6 8. Qd2 Qxb2 9. Rb1 Qa3
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5 e7e6 f2f4 d8b6 d1d2 b6b2 a1b1 b2a3
FEN: rnb1kb1r/1p3ppp/p2ppn2/6B1/3NPP2/q1N5/P1PQ2PP/1R2KB1R w Kkq –

ECO: B97
Opening Name: Sicilian Defense: Najdorf Variation, Poisoned Pawn Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Qb6
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5 e7e6 f2f4 d8b6
FEN: rnb1kb1r/1p3ppp/pq1ppn2/6B1/3NPP2/2N5/PPP3PP/R2QKB1R w KQkq –

ECO: B98
Opening Name: Sicilian Defense: Najdorf Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5 e7e6 f2f4 f8e7
FEN: rnbqk2r/1p2bppp/p2ppn2/6B1/3NPP2/2N5/PPP3PP/R2QKB1R w KQkq –

ECO: B98
Opening Name: Sicilian Defense: Najdorf Variation, Browne Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Qf3 h6 9. Bh4 Qc7
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5 e7e6 f2f4 f8e7 d1f3 h7h6 g5h4 d8c7
FEN: rnb1k2r/1pq1bpp1/p2ppn1p/8/3NPP1B/2N2Q2/PPP3PP/R3KB1R w KQkq –

ECO: B98
Opening Name: Sicilian Defense: Najdorf Variation, Goteborg Variation
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Qf3 h6 9. Bh4 g5
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5 e7e6 f2f4 f8e7 d1f3 h7h6 g5h4 g7g5
FEN: rnbqk2r/1p2bp2/p2ppn1p/6p1/3NPP1B/2N2Q2/PPP3PP/R3KB1R w KQkq –

ECO: B98
Opening Name: Sicilian Defense: Najdorf Variation, Traditional Line
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Qf3 Qc7
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5 e7e6 f2f4 f8e7 d1f3 d8c7
FEN: rnb1k2r/1pq1bppp/p2ppn2/6B1/3NPP2/2N2Q2/PPP3PP/R3KB1R w KQkq –

ECO: B99
Opening Name: Sicilian Defense: Najdorf Variation, Main Line
SAN: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Qf3 Qc7 9. O-O-O Nbd7
UCI: e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5 e7e6 f2f4 f8e7 d1f3 d8c7 e1c1 b8d7
FEN: r1b1k2r/1pqnbppp/p2ppn2/6B1/3NPP2/2N2Q2/PPP3PP/2KR1B1R w kq –

ECO: C00
Opening Name: French Defense
SAN: 1. e4 e6
UCI: e2e4 e7e6
FEN: rnbqkbnr/pppp1ppp/4p3/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq –

ECO: C00
Opening Name: French Defense
SAN: 1. e4 e6 2. d4 d5
UCI: e2e4 e7e6 d2d4 d7d5
FEN: rnbqkbnr/ppp2ppp/4p3/3p4/3PP3/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: C00
Opening Name: French Defense: Alapin Gambit
SAN: 1. e4 e6 2. d4 d5 3. Be3
UCI: e2e4 e7e6 d2d4 d7d5 c1e3
FEN: rnbqkbnr/ppp2ppp/4p3/3p4/3PP3/4B3/PPP2PPP/RN1QKBNR b KQkq –

ECO: C00
Opening Name: French Defense: Baeuerle Gambit
SAN: 1. e4 e6 2. d4 b5
UCI: e2e4 e7e6 d2d4 b7b5
FEN: rnbqkbnr/p1pp1ppp/4p3/1p6/3PP3/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: C00
Opening Name: French Defense: Banzai-Leong Gambit
SAN: 1. e4 e6 2. b4
UCI: e2e4 e7e6 b2b4
FEN: rnbqkbnr/pppp1ppp/4p3/8/1P2P3/8/P1PP1PPP/RNBQKBNR b KQkq –

ECO: C00
Opening Name: French Defense: Banzai-Leong Gambit, Pinova Gambit
SAN: 1. e4 e6 2. b4 Bxb4 3. e5
UCI: e2e4 e7e6 b2b4 f8b4 e4e5
FEN: rnbqk1nr/pppp1ppp/4p3/4P3/1b6/8/P1PP1PPP/RNBQKBNR b KQkq –

ECO: C00
Opening Name: French Defense: Bird Invitation
SAN: 1. e4 e6 2. Bb5
UCI: e2e4 e7e6 f1b5
FEN: rnbqkbnr/pppp1ppp/4p3/1B6/4P3/8/PPPP1PPP/RNBQK1NR b KQkq –

ECO: C00
Opening Name: French Defense: Carlson Gambit
SAN: 1. e4 e6 2. d4 d5 3. Nf3 dxe4 4. Ne5
UCI: e2e4 e7e6 d2d4 d7d5 g1f3 d5e4 f3e5
FEN: rnbqkbnr/ppp2ppp/4p3/4N3/3Pp3/8/PPP2PPP/RNBQKB1R b KQkq –

ECO: C00
Opening Name: French Defense: Chigorin Variation
SAN: 1. e4 e6 2. Qe2
UCI: e2e4 e7e6 d1e2
FEN: rnbqkbnr/pppp1ppp/4p3/8/4P3/8/PPPPQPPP/RNB1KBNR b KQkq –

ECO: C00
Opening Name: French Defense: Diemer-Duhm Gambit
SAN: 1. e4 e6 2. d4 d5 3. c4
UCI: e2e4 e7e6 d2d4 d7d5 c2c4
FEN: rnbqkbnr/ppp2ppp/4p3/3p4/2PPP3/8/PP3PPP/RNBQKBNR b KQkq –

ECO: C00
Opening Name: French Defense: Diemer-Duhm Gambit Accepted
SAN: 1. e4 e6 2. d4 d5 3. c4 dxe4
UCI: e2e4 e7e6 d2d4 d7d5 c2c4 d5e4
FEN: rnbqkbnr/ppp2ppp/4p3/8/2PPp3/8/PP3PPP/RNBQKBNR w KQkq –

ECO: C00
Opening Name: French Defense: Franco-Hiva Gambit
SAN: 1. e4 e6 2. d4 f5
UCI: e2e4 e7e6 d2d4 f7f5
FEN: rnbqkbnr/pppp2pp/4p3/5p2/3PP3/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: C00
Opening Name: French Defense: Franco-Hiva Gambit Accepted
SAN: 1. e4 e6 2. d4 f5 3. exf5
UCI: e2e4 e7e6 d2d4 f7f5 e4f5
FEN: rnbqkbnr/pppp2pp/4p3/5P2/3P4/8/PPP2PPP/RNBQKBNR b KQkq –

ECO: C00
Opening Name: French Defense: Franco-Sicilian Defense
SAN: 1. e4 e6 2. d4 c5
UCI: e2e4 e7e6 d2d4 c7c5
FEN: rnbqkbnr/pp1p1ppp/4p3/2p5/3PP3/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: C00
Opening Name: French Defense: Hoffmann Gambit
SAN: 1. e4 e6 2. d4 d5 3. Qe2 e5 4. f4 exf4
UCI: e2e4 e7e6 d2d4 d7d5 d1e2 e6e5 f2f4 e5f4
FEN: rnbqkbnr/ppp2ppp/8/3p4/3PPp2/8/PPP1Q1PP/RNB1KBNR w KQkq –

ECO: C00
Opening Name: French Defense: Horwitz Attack
SAN: 1. e4 e6 2. b3
UCI: e2e4 e7e6 b2b3
FEN: rnbqkbnr/pppp1ppp/4p3/8/4P3/1P6/P1PP1PPP/RNBQKBNR b KQkq –

ECO: C00
Opening Name: French Defense: Horwitz Attack, Papa-Ticulat Gambit
SAN: 1. e4 e6 2. b3 d5 3. Bb2
UCI: e2e4 e7e6 b2b3 d7d5 c1b2
FEN: rnbqkbnr/ppp2ppp/4p3/3p4/4P3/1P6/PBPP1PPP/RN1QKBNR b KQkq –

ECO: C00
Opening Name: French Defense: King’s Indian Attack
SAN: 1. e4 e6 2. d3
UCI: e2e4 e7e6 d2d3
FEN: rnbqkbnr/pppp1ppp/4p3/8/4P3/3P4/PPP2PPP/RNBQKBNR b KQkq –

ECO: C00
Opening Name: French Defense: King’s Indian Attack, Franco-Hiva Gambit
SAN: 1. e4 e6 2. d3 f5
UCI: e2e4 e7e6 d2d3 f7f5
FEN: rnbqkbnr/pppp2pp/4p3/5p2/4P3/3P4/PPP2PPP/RNBQKBNR w KQkq –

ECO: C00
Opening Name: French Defense: Knight Variation
SAN: 1. e4 e6 2. Nf3
UCI: e2e4 e7e6 g1f3
FEN: rnbqkbnr/pppp1ppp/4p3/8/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq –

ECO: C00
Opening Name: French Defense: Knight Variation, Franco-Hiva Gambit
SAN: 1. e4 e6 2. Nf3 f5
UCI: e2e4 e7e6 g1f3 f7f5
FEN: rnbqkbnr/pppp2pp/4p3/5p2/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq –

ECO: C00
Opening Name: French Defense: La Bourdonnais Variation
SAN: 1. e4 e6 2. f4
UCI: e2e4 e7e6 f2f4
FEN: rnbqkbnr/pppp1ppp/4p3/8/4PP2/8/PPPP2PP/RNBQKBNR b KQkq –

ECO: C00
Opening Name: French Defense: La Bourdonnais Variation, Reuter Gambit
SAN: 1. e4 e6 2. f4 d5 3. Nf3 dxe4
UCI: e2e4 e7e6 f2f4 d7d5 g1f3 d5e4
FEN: rnbqkbnr/ppp2ppp/4p3/8/4pP2/5N2/PPPP2PP/RNBQKB1R w KQkq –

ECO: C00
Opening Name: French Defense: Mediterranean Defense
SAN: 1. e4 e6 2. d4 Nf6
UCI: e2e4 e7e6 d2d4 g8f6
FEN: rnbqkb1r/pppp1ppp/4pn2/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: C00
Opening Name: French Defense: Morphy Gambit
SAN: 1. e4 e6 2. d4 d5 3. Nh3
UCI: e2e4 e7e6 d2d4 d7d5 g1h3
FEN: rnbqkbnr/ppp2ppp/4p3/3p4/3PP3/7N/PPP2PPP/RNBQKB1R b KQkq –

ECO: C00
Opening Name: French Defense: Normal Variation
SAN: 1. e4 e6 2. d4
UCI: e2e4 e7e6 d2d4
FEN: rnbqkbnr/pppp1ppp/4p3/8/3PP3/8/PPP2PPP/RNBQKBNR b KQkq –

ECO: C00
Opening Name: French Defense: Orthoschnapp Gambit
SAN: 1. e4 e6 2. c4 d5 3. cxd5 exd5 4. Qb3
UCI: e2e4 e7e6 c2c4 d7d5 c4d5 e6d5 d1b3
FEN: rnbqkbnr/ppp2ppp/8/3p4/4P3/1Q6/PP1P1PPP/RNB1KBNR b KQkq –

ECO: C00
Opening Name: French Defense: Pelikan Variation
SAN: 1. e4 e6 2. Nc3 d5 3. f4
UCI: e2e4 e7e6 b1c3 d7d5 f2f4
FEN: rnbqkbnr/ppp2ppp/4p3/3p4/4PP2/2N5/PPPP2PP/R1BQKBNR b KQkq –

ECO: C00
Opening Name: French Defense: Perseus Gambit
SAN: 1. e4 e6 2. d4 d5 3. Nf3
UCI: e2e4 e7e6 d2d4 d7d5 g1f3
FEN: rnbqkbnr/ppp2ppp/4p3/3p4/3PP3/5N2/PPP2PPP/RNBQKB1R b KQkq –

ECO: C00
Opening Name: French Defense: Queen’s Knight
SAN: 1. e4 e6 2. Nc3
UCI: e2e4 e7e6 b1c3
FEN: rnbqkbnr/pppp1ppp/4p3/8/4P3/2N5/PPPP1PPP/R1BQKBNR b KQkq –

ECO: C00
Opening Name: French Defense: Reversed Philidor Formation
SAN: 1. e4 e6 2. d3 d5 3. Nd2 Nf6 4. Ngf3 Nc6 5. Be2
UCI: e2e4 e7e6 d2d3 d7d5 b1d2 g8f6 g1f3 b8c6 f1e2
FEN: r1bqkb1r/ppp2ppp/2n1pn2/3p4/4P3/3P1N2/PPPNBPPP/R1BQK2R b KQkq –

ECO: C00
Opening Name: French Defense: Réti-Spielmann Attack
SAN: 1. e4 e6 2. g3
UCI: e2e4 e7e6 g2g3
FEN: rnbqkbnr/pppp1ppp/4p3/8/4P3/6P1/PPPP1P1P/RNBQKBNR b KQkq –

ECO: C00
Opening Name: French Defense: Schlechter Variation
SAN: 1. e4 e6 2. d4 d5 3. Bd3
UCI: e2e4 e7e6 d2d4 d7d5 f1d3
FEN: rnbqkbnr/ppp2ppp/4p3/3p4/3PP3/3B4/PPP2PPP/RNBQK1NR b KQkq –

ECO: C00
Opening Name: French Defense: St. George Defense
SAN: 1. e4 e6 2. d4 a6
UCI: e2e4 e7e6 d2d4 a7a6
FEN: rnbqkbnr/1ppp1ppp/p3p3/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: C00
Opening Name: French Defense: St. George Defense, Sanky-George Gambit
SAN: 1. e4 e6 2. d4 a6 3. c4 b5
UCI: e2e4 e7e6 d2d4 a7a6 c2c4 b7b5
FEN: rnbqkbnr/2pp1ppp/p3p3/1p6/2PPP3/8/PP3PPP/RNBQKBNR w KQkq –

ECO: C00
Opening Name: French Defense: St. George Defense, St. George Gambit
SAN: 1. e4 e6 2. d4 a6 3. c4 b5 4. cxb5 axb5
UCI: e2e4 e7e6 d2d4 a7a6 c2c4 b7b5 c4b5 a6b5
FEN: rnbqkbnr/2pp1ppp/4p3/1p6/3PP3/8/PP3PPP/RNBQKBNR w KQkq –

ECO: C00
Opening Name: French Defense: St. George Defense, Three Pawn Attack
SAN: 1. e4 e6 2. d4 a6 3. c4
UCI: e2e4 e7e6 d2d4 a7a6 c2c4
FEN: rnbqkbnr/1ppp1ppp/p3p3/8/2PPP3/8/PP3PPP/RNBQKBNR b KQkq –

ECO: C00
Opening Name: French Defense: St. George Defense, Traditional Line
SAN: 1. e4 e6 2. d4 a6 3. Nf3 b5 4. Bd3 c5 5. c3 Bb7 6. O-O Nf6
UCI: e2e4 e7e6 d2d4 a7a6 g1f3 b7b5 f1d3 c7c5 c2c3 c8b7 e1g1 g8f6
FEN: rn1qkb1r/1b1p1ppp/p3pn2/1pp5/3PP3/2PB1N2/PP3PPP/RNBQ1RK1 w kq –

ECO: C00
Opening Name: French Defense: Steiner Variation
SAN: 1. e4 e6 2. c4
UCI: e2e4 e7e6 c2c4
FEN: rnbqkbnr/pppp1ppp/4p3/8/2P1P3/8/PP1P1PPP/RNBQKBNR b KQkq –

ECO: C00
Opening Name: French Defense: Steinitz Attack
SAN: 1. e4 e6 2. e5
UCI: e2e4 e7e6 e4e5
FEN: rnbqkbnr/pppp1ppp/4p3/4P3/8/8/PPPP1PPP/RNBQKBNR b KQkq –

ECO: C00
Opening Name: French Defense: Two Knights Variation
SAN: 1. e4 e6 2. Nf3 d5 3. Nc3
UCI: e2e4 e7e6 g1f3 d7d5 b1c3
FEN: rnbqkbnr/ppp2ppp/4p3/3p4/4P3/2N2N2/PPPP1PPP/R1BQKB1R b KQkq –

ECO: C00
Opening Name: French Defense: Wing Gambit
SAN: 1. e4 e6 2. Nf3 d5 3. e5 c5 4. b4
UCI: e2e4 e7e6 g1f3 d7d5 e4e5 c7c5 b2b4
FEN: rnbqkbnr/pp3ppp/4p3/2ppP3/1P6/5N2/P1PP1PPP/RNBQKB1R b KQkq –

ECO: C00
Opening Name: Rat Defense: Small Center Defense
SAN: 1. d4 e6 2. e4 d6
UCI: d2d4 e7e6 e2e4 d7d6
FEN: rnbqkbnr/ppp2ppp/3pp3/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: C01
Opening Name: French Defense: Exchange Variation
SAN: 1. e4 e6 2. d4 d5 3. exd5
UCI: e2e4 e7e6 d2d4 d7d5 e4d5
FEN: rnbqkbnr/ppp2ppp/4p3/3P4/3P4/8/PPP2PPP/RNBQKBNR b KQkq –

ECO: C01
Opening Name: French Defense: Exchange Variation, Bogoljubow Variation
SAN: 1. e4 e6 2. d4 d5 3. exd5 exd5 4. Nc3 Nf6 5. Bg5 Nc6
UCI: e2e4 e7e6 d2d4 d7d5 e4d5 e6d5 b1c3 g8f6 c1g5 b8c6
FEN: r1bqkb1r/ppp2ppp/2n2n2/3p2B1/3P4/2N5/PPP2PPP/R2QKBNR w KQkq –

ECO: C01
Opening Name: French Defense: Exchange Variation, Monte Carlo Variation
SAN: 1. e4 e6 2. d4 d5 3. exd5 exd5 4. c4
UCI: e2e4 e7e6 d2d4 d7d5 e4d5 e6d5 c2c4
FEN: rnbqkbnr/ppp2ppp/8/3p4/2PP4/8/PP3PPP/RNBQKBNR b KQkq –

ECO: C01
Opening Name: French Defense: Exchange Variation, Svenonius Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. exd5 exd5 5. Bg5
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 e4d5 e6d5 c1g5
FEN: rnbqkb1r/ppp2ppp/5n2/3p2B1/3P4/2N5/PPP2PPP/R2QKBNR b KQkq –

ECO: C02
Opening Name: French Defense: Advance Variation
SAN: 1. e4 e6 2. d4 d5 3. e5
UCI: e2e4 e7e6 d2d4 d7d5 e4e5
FEN: rnbqkbnr/ppp2ppp/4p3/3pP3/3P4/8/PPP2PPP/RNBQKBNR b KQkq –

ECO: C02
Opening Name: French Defense: Advance Variation
SAN: 1. e4 e6 2. d4 d5 3. e5 c5
UCI: e2e4 e7e6 d2d4 d7d5 e4e5 c7c5
FEN: rnbqkbnr/pp3ppp/4p3/2ppP3/3P4/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: C02
Opening Name: French Defense: Advance Variation
SAN: 1. e4 e6 2. d4 d5 3. e5 c5 4. c3
UCI: e2e4 e7e6 d2d4 d7d5 e4e5 c7c5 c2c3
FEN: rnbqkbnr/pp3ppp/4p3/2ppP3/3P4/2P5/PP3PPP/RNBQKBNR b KQkq –

ECO: C02
Opening Name: French Defense: Advance Variation
SAN: 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6
UCI: e2e4 e7e6 d2d4 d7d5 e4e5 c7c5 c2c3 b8c6
FEN: r1bqkbnr/pp3ppp/2n1p3/2ppP3/3P4/2P5/PP3PPP/RNBQKBNR w KQkq –

ECO: C02
Opening Name: French Defense: Advance Variation, Euwe Variation
SAN: 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Bd7
UCI: e2e4 e7e6 d2d4 d7d5 e4e5 c7c5 c2c3 b8c6 g1f3 c8d7
FEN: r2qkbnr/pp1b1ppp/2n1p3/2ppP3/3P4/2P2N2/PP3PPP/RNBQKB1R w KQkq –

ECO: C02
Opening Name: French Defense: Advance Variation, Extended Bishop Swap
SAN: 1. e4 e6 2. d4 d5 3. e5 Bd7
UCI: e2e4 e7e6 d2d4 d7d5 e4e5 c8d7
FEN: rn1qkbnr/pppb1ppp/4p3/3pP3/3P4/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: C02
Opening Name: French Defense: Advance Variation, Frenkel Gambit
SAN: 1. e4 e6 2. d4 d5 3. e5 c5 4. b4
UCI: e2e4 e7e6 d2d4 d7d5 e4e5 c7c5 b2b4
FEN: rnbqkbnr/pp3ppp/4p3/2ppP3/1P1P4/8/P1P2PPP/RNBQKBNR b KQkq –

ECO: C02
Opening Name: French Defense: Advance Variation, Lputian Variation
SAN: 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. a3 Nh6
UCI: e2e4 e7e6 d2d4 d7d5 e4e5 c7c5 c2c3 b8c6 g1f3 d8b6 a2a3 g8h6
FEN: r1b1kb1r/pp3ppp/1qn1p2n/2ppP3/3P4/P1P2N2/1P3PPP/RNBQKB1R w KQkq –

ECO: C02
Opening Name: French Defense: Advance Variation, Main Line
SAN: 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. a3
UCI: e2e4 e7e6 d2d4 d7d5 e4e5 c7c5 c2c3 b8c6 g1f3 d8b6 a2a3
FEN: r1b1kbnr/pp3ppp/1qn1p3/2ppP3/3P4/P1P2N2/1P3PPP/RNBQKB1R b KQkq –

ECO: C02
Opening Name: French Defense: Advance Variation, Milner-Barry Gambit
SAN: 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. Bd3
UCI: e2e4 e7e6 d2d4 d7d5 e4e5 c7c5 c2c3 b8c6 g1f3 d8b6 f1d3
FEN: r1b1kbnr/pp3ppp/1qn1p3/2ppP3/3P4/2PB1N2/PP3PPP/RNBQK2R b KQkq –

ECO: C02
Opening Name: French Defense: Advance Variation, Milner-Barry Gambit, Sørensen Variation
SAN: 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. Bd3 cxd4 7. cxd4 Bd7 8. O-O Nxd4 9. Ng5
UCI: e2e4 e7e6 d2d4 d7d5 e4e5 c7c5 c2c3 b8c6 g1f3 d8b6 f1d3 c5d4 c3d4 c8d7 e1g1 c6d4 f3g5
FEN: r3kbnr/pp1b1ppp/1q2p3/3pP1N1/3n4/3B4/PP3PPP/RNBQ1RK1 b kq –

ECO: C02
Opening Name: French Defense: Advance Variation, Nimzowitsch Attack
SAN: 1. e4 e6 2. d4 d5 3. e5 c5 4. Qg4
UCI: e2e4 e7e6 d2d4 d7d5 e4e5 c7c5 d1g4
FEN: rnbqkbnr/pp3ppp/4p3/2ppP3/3P2Q1/8/PPP2PPP/RNB1KBNR b KQkq –

ECO: C02
Opening Name: French Defense: Advance Variation, Nimzowitsch Gambit
SAN: 1. e4 e6 2. d4 d5 3. e5 c5 4. Qg4 cxd4 5. Nf3
UCI: e2e4 e7e6 d2d4 d7d5 e4e5 c7c5 d1g4 c5d4 g1f3
FEN: rnbqkbnr/pp3ppp/4p3/3pP3/3p2Q1/5N2/PPP2PPP/RNB1KB1R b KQkq –

ECO: C02
Opening Name: French Defense: Advance Variation, Nimzowitsch System
SAN: 1. e4 e6 2. d4 d5 3. e5 c5 4. Nf3
UCI: e2e4 e7e6 d2d4 d7d5 e4e5 c7c5 g1f3
FEN: rnbqkbnr/pp3ppp/4p3/2ppP3/3P4/5N2/PPP2PPP/RNBQKB1R b KQkq –

ECO: C02
Opening Name: French Defense: Advance Variation, Paulsen Attack
SAN: 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3
UCI: e2e4 e7e6 d2d4 d7d5 e4e5 c7c5 c2c3 b8c6 g1f3
FEN: r1bqkbnr/pp3ppp/2n1p3/2ppP3/3P4/2P2N2/PP3PPP/RNBQKB1R b KQkq –

ECO: C02
Opening Name: French Defense: Advance Variation, Ruisdonk Gambit
SAN: 1. e4 e6 2. d4 d5 3. e5 c5 4. Nf3 cxd4 5. Bd3
UCI: e2e4 e7e6 d2d4 d7d5 e4e5 c7c5 g1f3 c5d4 f1d3
FEN: rnbqkbnr/pp3ppp/4p3/3pP3/3p4/3B1N2/PPP2PPP/RNBQK2R b KQkq –

ECO: C02
Opening Name: French Defense: Advance Variation, Steinitz Variation
SAN: 1. e4 e6 2. d4 d5 3. e5 c5 4. dxc5
UCI: e2e4 e7e6 d2d4 d7d5 e4e5 c7c5 d4c5
FEN: rnbqkbnr/pp3ppp/4p3/2PpP3/8/8/PPP2PPP/RNBQKBNR b KQkq –

ECO: C02
Opening Name: French Defense: Advance Variation, Wade Variation
SAN: 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Qb6 5. Nf3 Bd7
UCI: e2e4 e7e6 d2d4 d7d5 e4e5 c7c5 c2c3 d8b6 g1f3 c8d7
FEN: rn2kbnr/pp1b1ppp/1q2p3/2ppP3/3P4/2P2N2/PP3PPP/RNBQKB1R w KQkq –

ECO: C03
Opening Name: French Defense: Guimard Variation, Thunderbunny Variation
SAN: 1. e4 e6 2. d4 d5 3. Nd2 Nc6 4. c3 dxe4 5. Nxe4 e5
UCI: e2e4 e7e6 d2d4 d7d5 b1d2 b8c6 c2c3 d5e4 d2e4 e6e5
FEN: r1bqkbnr/ppp2ppp/2n5/4p3/3PN3/2P5/PP3PPP/R1BQKBNR w KQkq –

ECO: C03
Opening Name: French Defense: Tarrasch Variation
SAN: 1. e4 e6 2. d4 d5 3. Nd2
UCI: e2e4 e7e6 d2d4 d7d5 b1d2
FEN: rnbqkbnr/ppp2ppp/4p3/3p4/3PP3/8/PPPN1PPP/R1BQKBNR b KQkq –

ECO: C03
Opening Name: French Defense: Tarrasch Variation, Guimard Defense
SAN: 1. e4 e6 2. d4 d5 3. Nd2 Nc6
UCI: e2e4 e7e6 d2d4 d7d5 b1d2 b8c6
FEN: r1bqkbnr/ppp2ppp/2n1p3/3p4/3PP3/8/PPPN1PPP/R1BQKBNR w KQkq –

ECO: C03
Opening Name: French Defense: Tarrasch Variation, Haberditz Variation
SAN: 1. e4 e6 2. d4 d5 3. Nd2 f5
UCI: e2e4 e7e6 d2d4 d7d5 b1d2 f7f5
FEN: rnbqkbnr/ppp3pp/4p3/3p1p2/3PP3/8/PPPN1PPP/R1BQKBNR w KQkq –

ECO: C03
Opening Name: French Defense: Tarrasch Variation, Modern System
SAN: 1. e4 e6 2. d4 d5 3. Nd2 a6
UCI: e2e4 e7e6 d2d4 d7d5 b1d2 a7a6
FEN: rnbqkbnr/1pp2ppp/p3p3/3p4/3PP3/8/PPPN1PPP/R1BQKBNR w KQkq –

ECO: C03
Opening Name: French Defense: Tarrasch Variation, Morozevich Variation
SAN: 1. e4 e6 2. d4 d5 3. Nd2 Be7
UCI: e2e4 e7e6 d2d4 d7d5 b1d2 f8e7
FEN: rnbqk1nr/ppp1bppp/4p3/3p4/3PP3/8/PPPN1PPP/R1BQKBNR w KQkq –

ECO: C04
Opening Name: French Defense: Tarrasch Variation, Guimard Defense, Main Line
SAN: 1. e4 e6 2. d4 d5 3. Nd2 Nc6 4. Ngf3 Nf6
UCI: e2e4 e7e6 d2d4 d7d5 b1d2 b8c6 g1f3 g8f6
FEN: r1bqkb1r/ppp2ppp/2n1pn2/3p4/3PP3/5N2/PPPN1PPP/R1BQKB1R w KQkq –

ECO: C05
Opening Name: French Defense: Tarrasch Variation, Botvinnik Variation
SAN: 1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 b6
UCI: e2e4 e7e6 d2d4 d7d5 b1d2 g8f6 e4e5 f6d7 f1d3 c7c5 c2c3 b7b6
FEN: rnbqkb1r/p2n1ppp/1p2p3/2ppP3/3P4/2PB4/PP1N1PPP/R1BQK1NR w KQkq –

ECO: C05
Opening Name: French Defense: Tarrasch Variation, Closed Variation
SAN: 1. e4 e6 2. d4 d5 3. Nd2 Nf6
UCI: e2e4 e7e6 d2d4 d7d5 b1d2 g8f6
FEN: rnbqkb1r/ppp2ppp/4pn2/3p4/3PP3/8/PPPN1PPP/R1BQKBNR w KQkq –

ECO: C05
Opening Name: French Defense: Tarrasch Variation, Closed Variation
SAN: 1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 Nc6
UCI: e2e4 e7e6 d2d4 d7d5 b1d2 g8f6 e4e5 f6d7 f1d3 c7c5 c2c3 b8c6
FEN: r1bqkb1r/pp1n1ppp/2n1p3/2ppP3/3P4/2PB4/PP1N1PPP/R1BQK1NR w KQkq –

ECO: C05
Opening Name: French Defense: Tarrasch Variation, Pawn Center Variation
SAN: 1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. f4
UCI: e2e4 e7e6 d2d4 d7d5 b1d2 g8f6 e4e5 f6d7 f2f4
FEN: rnbqkb1r/pppn1ppp/4p3/3pP3/3P1P2/8/PPPN2PP/R1BQKBNR b KQkq –

ECO: C06
Opening Name: French Defense: Tarrasch Variation, Closed Variation, Main Line
SAN: 1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 Nc6 7. Ne2 cxd4 8. cxd4
UCI: e2e4 e7e6 d2d4 d7d5 b1d2 g8f6 e4e5 f6d7 f1d3 c7c5 c2c3 b8c6 g1e2 c5d4 c3d4
FEN: r1bqkb1r/pp1n1ppp/2n1p3/3pP3/3P4/3B4/PP1NNPPP/R1BQK2R b KQkq –

ECO: C06
Opening Name: French Defense: Tarrasch Variation, Leningrad Variation
SAN: 1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 Nc6 7. Ne2 cxd4 8. cxd4 Nb6
UCI: e2e4 e7e6 d2d4 d7d5 b1d2 g8f6 e4e5 f6d7 f1d3 c7c5 c2c3 b8c6 g1e2 c5d4 c3d4 d7b6
FEN: r1bqkb1r/pp3ppp/1nn1p3/3pP3/3P4/3B4/PP1NNPPP/R1BQK2R w KQkq –

ECO: C07
Opening Name: French Defense: Tarrasch Variation, Chistyakov Defense
SAN: 1. e4 e6 2. d4 d5 3. Nd2 c5 4. exd5 Qxd5
UCI: e2e4 e7e6 d2d4 d7d5 b1d2 c7c5 e4d5 d8d5
FEN: rnb1kbnr/pp3ppp/4p3/2pq4/3P4/8/PPPN1PPP/R1BQKBNR w KQkq –

ECO: C07
Opening Name: French Defense: Tarrasch Variation, Chistyakov Defense, Modern Line
SAN: 1. e4 e6 2. d4 d5 3. Nd2 c5 4. exd5 Qxd5 5. Ngf3 cxd4 6. Bc4 Qd6 7. O-O Nf6 8. Nb3 Nc6 9. Nbxd4 Nxd4 10. Nxd4 a6
UCI: e2e4 e7e6 d2d4 d7d5 b1d2 c7c5 e4d5 d8d5 g1f3 c5d4 f1c4 d5d6 e1g1 g8f6 d2b3 b8c6 b3d4 c6d4 f3d4 a7a6
FEN: r1b1kb1r/1p3ppp/p2qpn2/8/2BN4/8/PPP2PPP/R1BQ1RK1 w kq –

ECO: C07
Opening Name: French Defense: Tarrasch Variation, Eliskases Variation
SAN: 1. e4 e6 2. d4 d5 3. Nd2 c5 4. exd5 Qxd5 5. Ngf3 cxd4 6. Bc4 Qd8
UCI: e2e4 e7e6 d2d4 d7d5 b1d2 c7c5 e4d5 d8d5 g1f3 c5d4 f1c4 d5d8
FEN: rnbqkbnr/pp3ppp/4p3/8/2Bp4/5N2/PPPN1PPP/R1BQK2R w KQkq –

ECO: C07
Opening Name: French Defense: Tarrasch Variation, Open System
SAN: 1. e4 e6 2. d4 d5 3. Nd2 c5
UCI: e2e4 e7e6 d2d4 d7d5 b1d2 c7c5
FEN: rnbqkbnr/pp3ppp/4p3/2pp4/3PP3/8/PPPN1PPP/R1BQKBNR w KQkq –

ECO: C07
Opening Name: French Defense: Tarrasch Variation, Open System, Euwe-Keres Line
SAN: 1. e4 e6 2. d4 d5 3. Nd2 c5 4. Ngf3
UCI: e2e4 e7e6 d2d4 d7d5 b1d2 c7c5 g1f3
FEN: rnbqkbnr/pp3ppp/4p3/2pp4/3PP3/5N2/PPPN1PPP/R1BQKB1R b KQkq –

ECO: C07
Opening Name: French Defense: Tarrasch Variation, Open System, Shaposhnikov Gambit
SAN: 1. e4 e6 2. d4 d5 3. Nd2 c5 4. exd5 Nf6
UCI: e2e4 e7e6 d2d4 d7d5 b1d2 c7c5 e4d5 g8f6
FEN: rnbqkb1r/pp3ppp/4pn2/2pP4/3P4/8/PPPN1PPP/R1BQKBNR w KQkq –

ECO: C07
Opening Name: French Defense: Tarrasch Variation, Open System, Süchting Line
SAN: 1. e4 e6 2. d4 d5 3. Nd2 c5 4. c3
UCI: e2e4 e7e6 d2d4 d7d5 b1d2 c7c5 c2c3
FEN: rnbqkbnr/pp3ppp/4p3/2pp4/3PP3/2P5/PP1N1PPP/R1BQKBNR b KQkq –

ECO: C08
Opening Name: French Defense: Tarrasch Variation, Open System
SAN: 1. e4 e6 2. d4 d5 3. Nd2 c5 4. exd5 exd5
UCI: e2e4 e7e6 d2d4 d7d5 b1d2 c7c5 e4d5 e6d5
FEN: rnbqkbnr/pp3ppp/8/2pp4/3P4/8/PPPN1PPP/R1BQKBNR w KQkq –

ECO: C08
Opening Name: French Defense: Tarrasch Variation, Open System, Advance Line
SAN: 1. e4 e6 2. d4 d5 3. Nd2 c5 4. exd5 exd5 5. Ngf3 c4
UCI: e2e4 e7e6 d2d4 d7d5 b1d2 c7c5 e4d5 e6d5 g1f3 c5c4
FEN: rnbqkbnr/pp3ppp/8/3p4/2pP4/5N2/PPPN1PPP/R1BQKB1R w KQkq –

ECO: C09
Opening Name: French Defense: Tarrasch Variation, Open System, Main Line
SAN: 1. e4 e6 2. d4 d5 3. Nd2 c5 4. exd5 exd5 5. Ngf3 Nc6
UCI: e2e4 e7e6 d2d4 d7d5 b1d2 c7c5 e4d5 e6d5 g1f3 b8c6
FEN: r1bqkbnr/pp3ppp/2n5/2pp4/3P4/5N2/PPPN1PPP/R1BQKB1R w KQkq –

ECO: C10
Opening Name: French Defense: Classical Variation, Svenonius Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nc6 4. exd5
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 b8c6 e4d5
FEN: r1bqkbnr/ppp2ppp/2n1p3/3P4/3P4/2N5/PPP2PPP/R1BQKBNR b KQkq –

ECO: C10
Opening Name: French Defense: Paulsen Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3
UCI: e2e4 e7e6 d2d4 d7d5 b1c3
FEN: rnbqkbnr/ppp2ppp/4p3/3p4/3PP3/2N5/PPP2PPP/R1BQKBNR b KQkq –

ECO: C10
Opening Name: French Defense: Rubinstein Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 dxe4
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 d5e4
FEN: rnbqkbnr/ppp2ppp/4p3/8/3Pp3/2N5/PPP2PPP/R1BQKBNR w KQkq –

ECO: C10
Opening Name: French Defense: Rubinstein Variation, Blackburne Defense
SAN: 1. e4 e6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nd7
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 d5e4 c3e4 b8d7
FEN: r1bqkbnr/pppn1ppp/4p3/8/3PN3/8/PPP2PPP/R1BQKBNR w KQkq –

ECO: C10
Opening Name: French Defense: Rubinstein Variation, Capablanca Line
SAN: 1. e4 e6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nd7 5. Nf3 Ngf6 6. Nxf6+ Nxf6 7. Ne5
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 d5e4 c3e4 b8d7 g1f3 g8f6 e4f6 d7f6 f3e5
FEN: r1bqkb1r/ppp2ppp/4pn2/4N3/3P4/8/PPP2PPP/R1BQKB1R b KQkq –

ECO: C10
Opening Name: French Defense: Rubinstein Variation, Ellis Gambit
SAN: 1. e4 e6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 e5
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 d5e4 c3e4 e6e5
FEN: rnbqkbnr/ppp2ppp/8/4p3/3PN3/8/PPP2PPP/R1BQKBNR w KQkq –

ECO: C10
Opening Name: French Defense: Rubinstein Variation, Fort Knox Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bd7 5. Nf3 Bc6
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 d5e4 c3e4 c8d7 g1f3 d7c6
FEN: rn1qkbnr/ppp2ppp/2b1p3/8/3PN3/5N2/PPP2PPP/R1BQKB1R w KQkq –

ECO: C10
Opening Name: French Defense: Rubinstein Variation, Kasparov Attack
SAN: 1. e4 e6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nd7 5. Nf3 Ngf6 6. Nxf6+ Nxf6 7. c3
UCI: e2e4 e7e6 d2d4 d7d5 b1d2 d5e4 d2e4 b8d7 g1f3 g8f6 e4f6 d7f6 c2c3
FEN: r1bqkb1r/ppp2ppp/4pn2/8/3P4/2P2N2/PP3PPP/R1BQKB1R b KQkq –

ECO: C10
Opening Name: French Defense: Rubinstein Variation, Maric Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Qd5
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 d5e4 c3e4 d8d5
FEN: rnb1kbnr/ppp2ppp/4p3/3q4/3PN3/8/PPP2PPP/R1BQKBNR w KQkq –

ECO: C10
Opening Name: Sicilian Defense: Marshall Gambit
SAN: 1. e4 c5 2. Nc3 e6 3. d4 d5
UCI: e2e4 c7c5 b1c3 e7e6 d2d4 d7d5
FEN: rnbqkbnr/pp3ppp/4p3/2pp4/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq –

ECO: C11
Opening Name: French Defense: Burn Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5
FEN: rnbqkb1r/ppp2ppp/4pn2/3p2B1/3PP3/2N5/PPP2PPP/R2QKBNR b KQkq –

ECO: C11
Opening Name: French Defense: Classical Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6
FEN: rnbqkb1r/ppp2ppp/4pn2/3p4/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq –

ECO: C11
Opening Name: French Defense: Classical Variation, Burn Variation, Main Line
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 dxe4 5. Nxe4 Be7 6. Bxf6 Bxf6 7. Nf3 O-O
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 d5e4 c3e4 f8e7 g5f6 e7f6 g1f3 e8g8
FEN: rnbq1rk1/ppp2ppp/4pb2/8/3PN3/5N2/PPP2PPP/R2QKB1R w KQ –

ECO: C11
Opening Name: French Defense: Classical Variation, Burn Variation, Morozevich Line
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 dxe4 5. Nxe4 Be7 6. Bxf6 gxf6
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 d5e4 c3e4 f8e7 g5f6 g7f6
FEN: rnbqk2r/ppp1bp1p/4pp2/8/3PN3/8/PPP2PPP/R2QKBNR w KQkq –

ECO: C11
Opening Name: French Defense: Classical Variation, Delayed Exchange Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. exd5
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 e4d5
FEN: rnbqkb1r/ppp2ppp/4pn2/3P4/3P4/2N5/PPP2PPP/R1BQKBNR b KQkq –

ECO: C11
Opening Name: French Defense: Classical Variation, Steinitz Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 e4e5
FEN: rnbqkb1r/ppp2ppp/4pn2/3pP3/3P4/2N5/PPP2PPP/R1BQKBNR b KQkq –

ECO: C11
Opening Name: French Defense: Classical Variation, Swiss Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bd3
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 f1d3
FEN: rnbqkb1r/ppp2ppp/4pn2/3p4/3PP3/2NB4/PPP2PPP/R1BQK1NR b KQkq –

ECO: C11
Opening Name: French Defense: Henneberger Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Be3
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1e3
FEN: rnbqkb1r/ppp2ppp/4pn2/3p4/3PP3/2N1B3/PPP2PPP/R2QKBNR b KQkq –

ECO: C11
Opening Name: French Defense: Steinitz Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 a6 4. Nf3 Nf6 5. e5 Nfd7
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 a7a6 g1f3 g8f6 e4e5 f6d7
FEN: rnbqkb1r/1ppn1ppp/p3p3/3pP3/3P4/2N2N2/PPP2PPP/R1BQKB1R w KQkq –

ECO: C11
Opening Name: French Defense: Steinitz Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 a6 4. Nf3 Nf6 5. e5 Nfd7 6. a3
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 a7a6 g1f3 g8f6 e4e5 f6d7 a2a3
FEN: rnbqkb1r/1ppn1ppp/p3p3/3pP3/3P4/P1N2N2/1PP2PPP/R1BQKB1R b KQkq –

ECO: C11
Opening Name: French Defense: Steinitz Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 a6 4. Nf3 Nf6 5. e5 Nfd7 6. Ne2
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 a7a6 g1f3 g8f6 e4e5 f6d7 c3e2
FEN: rnbqkb1r/1ppn1ppp/p3p3/3pP3/3P4/5N2/PPP1NPPP/R1BQKB1R b KQkq –

ECO: C11
Opening Name: French Defense: Steinitz Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. dxc5 Nc6
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 e4e5 f6d7 f2f4 c7c5 d4c5 b8c6
FEN: r1bqkb1r/pp1n1ppp/2n1p3/2PpP3/5P2/2N5/PPP3PP/R1BQKBNR w KQkq –

ECO: C11
Opening Name: French Defense: Steinitz Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. Nf3
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 e4e5 f6d7 f2f4 c7c5 g1f3
FEN: rnbqkb1r/pp1n1ppp/4p3/2ppP3/3P1P2/2N2N2/PPP3PP/R1BQKB1R b KQkq –

ECO: C11
Opening Name: French Defense: Steinitz Variation, Boleslavsky Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. Nf3 Nc6 7. Be3
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 e4e5 f6d7 f2f4 c7c5 g1f3 b8c6 c1e3
FEN: r1bqkb1r/pp1n1ppp/2n1p3/2ppP3/3P1P2/2N1BN2/PPP3PP/R2QKB1R b KQkq –

ECO: C11
Opening Name: French Defense: Steinitz Variation, Bradford Attack Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. dxc5 Bxc5 7. Qg4
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 e4e5 f6d7 f2f4 c7c5 d4c5 f8c5 d1g4
FEN: rnbqk2r/pp1n1ppp/4p3/2bpP3/5PQ1/2N5/PPP3PP/R1B1KBNR b KQkq –

ECO: C11
Opening Name: French Defense: Steinitz Variation, Brodsky-Jones Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. dxc5 Nc6 7. a3 Bxc5 8. Qg4 O-O 9. Nf3 f6
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 e4e5 f6d7 f2f4 c7c5 d4c5 b8c6 a2a3 f8c5 d1g4 e8g8 g1f3 f7f6
FEN: r1bq1rk1/pp1n2pp/2n1pp2/2bpP3/5PQ1/P1N2N2/1PP3PP/R1B1KB1R w KQ –

ECO: C11
Opening Name: French Defense: Steinitz Variation, Gledhill Attack
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. Qg4
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 e4e5 f6d7 d1g4
FEN: rnbqkb1r/pppn1ppp/4p3/3pP3/3P2Q1/2N5/PPP2PPP/R1B1KBNR b KQkq –

ECO: C12
Opening Name: French Defense: MacCutcheon Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8b4
FEN: rnbqk2r/ppp2ppp/4pn2/3p2B1/1b1PP3/2N5/PPP2PPP/R2QKBNR w KQkq –

ECO: C12
Opening Name: French Defense: MacCutcheon Variation, Advance Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8b4 e4e5
FEN: rnbqk2r/ppp2ppp/4pn2/3pP1B1/1b1P4/2N5/PPP2PPP/R2QKBNR b KQkq –

ECO: C12
Opening Name: French Defense: MacCutcheon Variation, Bernstein Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. Bh4
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8b4 e4e5 h7h6 g5h4
FEN: rnbqk2r/ppp2pp1/4pn1p/3pP3/1b1P3B/2N5/PPP2PPP/R2QKBNR b KQkq –

ECO: C12
Opening Name: French Defense: MacCutcheon Variation, Bogoljubow Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. exd5 Qxd5 6. Bxf6 gxf6 7. Qd2 Qa5
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8b4 e4d5 d8d5 g5f6 g7f6 d1d2 d5a5
FEN: rnb1k2r/ppp2p1p/4pp2/q7/1b1P4/2N5/PPPQ1PPP/R3KBNR w KQkq –

ECO: C12
Opening Name: French Defense: MacCutcheon Variation, Chigorin Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. exf6
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8b4 e4e5 h7h6 e5f6
FEN: rnbqk2r/ppp2pp1/4pP1p/3p2B1/1b1P4/2N5/PPP2PPP/R2QKBNR b KQkq –

ECO: C12
Opening Name: French Defense: MacCutcheon Variation, Dr. Olland Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. Bc1
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8b4 e4e5 h7h6 g5c1
FEN: rnbqk2r/ppp2pp1/4pn1p/3pP3/1b1P4/2N5/PPP2PPP/R1BQKBNR b KQkq –

ECO: C12
Opening Name: French Defense: MacCutcheon Variation, Duras Variation
SAN: 1. e4 e6 2. Nc3 d5 3. d4 Nf6 4. Bg5 Bb4 5. e5 h6 6. Bd2 Bxc3 7. bxc3 Ne4 8. Qg4 Kf8 9. Bc1
UCI: e2e4 e7e6 b1c3 d7d5 d2d4 g8f6 c1g5 f8b4 e4e5 h7h6 g5d2 b4c3 b2c3 f6e4 d1g4 e8f8 d2c1
FEN: rnbq1k1r/ppp2pp1/4p2p/3pP3/3Pn1Q1/2P5/P1P2PPP/R1B1KBNR b KQ –

ECO: C12
Opening Name: French Defense: MacCutcheon Variation, Exchange Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. exd5
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8b4 e4d5
FEN: rnbqk2r/ppp2ppp/4pn2/3P2B1/1b1P4/2N5/PPP2PPP/R2QKBNR b KQkq –

ECO: C12
Opening Name: French Defense: MacCutcheon Variation, Grigoriev Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. exf6 hxg5 7. fxg7 Rg8 8. h4 gxh4 9. Qg4
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8b4 e4e5 h7h6 e5f6 h6g5 f6g7 h8g8 h2h4 g5h4 d1g4
FEN: rnbqk1r1/ppp2pP1/4p3/3p4/1b1P2Qp/2N5/PPP2PP1/R3KBNR b KQq –

ECO: C12
Opening Name: French Defense: MacCutcheon Variation, Janowski Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. Be3
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8b4 e4e5 h7h6 g5e3
FEN: rnbqk2r/ppp2pp1/4pn1p/3pP3/1b1P4/2N1B3/PPP2PPP/R2QKBNR b KQkq –

ECO: C12
Opening Name: French Defense: MacCutcheon Variation, Lasker Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. Bd2 Bxc3
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8b4 e4e5 h7h6 g5d2 b4c3
FEN: rnbqk2r/ppp2pp1/4pn1p/3pP3/3P4/2b5/PPPB1PPP/R2QKBNR w KQkq –

ECO: C12
Opening Name: French Defense: MacCutcheon Variation, Lasker Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. Bd2 Bxc3 7. bxc3 Ne4 8. Qg4 g6
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8b4 e4e5 h7h6 g5d2 b4c3 b2c3 f6e4 d1g4 g7g6
FEN: rnbqk2r/ppp2p2/4p1pp/3pP3/3Pn1Q1/2P5/P1PB1PPP/R3KBNR w KQkq –

ECO: C12
Opening Name: French Defense: MacCutcheon Variation, Tartakower Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. Bd2 Nfd7
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8b4 e4e5 h7h6 g5d2 f6d7
FEN: rnbqk2r/pppn1pp1/4p2p/3pP3/1b1P4/2N5/PPPB1PPP/R2QKBNR w KQkq –

ECO: C13
Opening Name: French Defense: Alekhine-Chatard Attack
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. h4
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8e7 e4e5 f6d7 h2h4
FEN: rnbqk2r/pppnbppp/4p3/3pP1B1/3P3P/2N5/PPP2PP1/R2QKBNR b KQkq –

ECO: C13
Opening Name: French Defense: Alekhine-Chatard Attack, Albin-Chatard Gambit
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. h4 Bxg5 7. hxg5 Qxg5
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8e7 e4e5 f6d7 h2h4 e7g5 h4g5 d8g5
FEN: rnb1k2r/pppn1ppp/4p3/3pP1q1/3P4/2N5/PPP2PP1/R2QKBNR w KQkq –

ECO: C13
Opening Name: French Defense: Alekhine-Chatard Attack, Breyer Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. h4 c5
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8e7 e4e5 f6d7 h2h4 c7c5
FEN: rnbqk2r/pp1nbppp/4p3/2ppP1B1/3P3P/2N5/PPP2PP1/R2QKBNR w KQkq –

ECO: C13
Opening Name: French Defense: Alekhine-Chatard Attack, Maróczy Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. h4 a6
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8e7 e4e5 f6d7 h2h4 a7a6
FEN: rnbqk2r/1ppnbppp/p3p3/3pP1B1/3P3P/2N5/PPP2PP1/R2QKBNR w KQkq –

ECO: C13
Opening Name: French Defense: Alekhine-Chatard Attack, Spielmann Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. h4 O-O
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8e7 e4e5 f6d7 h2h4 e8g8
FEN: rnbq1rk1/pppnbppp/4p3/3pP1B1/3P3P/2N5/PPP2PP1/R2QKBNR w KQ –

ECO: C13
Opening Name: French Defense: Alekhine-Chatard Attack, Teichmann Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. h4 f6
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8e7 e4e5 f6d7 h2h4 f7f6
FEN: rnbqk2r/pppnb1pp/4pp2/3pP1B1/3P3P/2N5/PPP2PP1/R2QKBNR w KQkq –

ECO: C13
Opening Name: French Defense: Classical Variation, Frankfurt Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Ng8 6. Be3 b6
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8e7 e4e5 f6g8 g5e3 b7b6
FEN: rnbqk1nr/p1p1bppp/1p2p3/3pP3/3P4/2N1B3/PPP2PPP/R2QKBNR w KQkq –

ECO: C13
Opening Name: French Defense: Classical Variation, Normal Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8e7
FEN: rnbqk2r/ppp1bppp/4pn2/3p2B1/3PP3/2N5/PPP2PPP/R2QKBNR w KQkq –

ECO: C13
Opening Name: French Defense: Classical Variation, Richter Attack
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. Bxf6
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8e7 g5f6
FEN: rnbqk2r/ppp1bppp/4pB2/3p4/3PP3/2N5/PPP2PPP/R2QKBNR b KQkq –

ECO: C13
Opening Name: French Defense: Classical Variation, Richter Attack
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. Bxf6 Bxf6 6. e5 Be7 7. Qg4
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8e7 g5f6 e7f6 e4e5 f6e7 d1g4
FEN: rnbqk2r/ppp1bppp/4p3/3pP3/3P2Q1/2N5/PPP2PPP/R3KBNR b KQkq –

ECO: C13
Opening Name: French Defense: Classical Variation, Tartakower Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Ne4
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8e7 e4e5 f6e4
FEN: rnbqk2r/ppp1bppp/4p3/3pP1B1/3Pn3/2N5/PPP2PPP/R2QKBNR w KQkq –

ECO: C13
Opening Name: French Defense: Classical Variation, Vistaneckis Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Ng8
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8e7 e4e5 f6g8
FEN: rnbqk1nr/ppp1bppp/4p3/3pP1B1/3P4/2N5/PPP2PPP/R2QKBNR w KQkq –

ECO: C14
Opening Name: French Defense: Classical Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 a6 4. Nf3 Nf6 5. e5 Nfd7 6. Bg5
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 a7a6 g1f3 g8f6 e4e5 f6d7 c1g5
FEN: rnbqkb1r/1ppn1ppp/p3p3/3pP1B1/3P4/2N2N2/PPP2PPP/R2QKB1R b KQkq –

ECO: C14
Opening Name: French Defense: Classical Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. Bxe7 Qxe7
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8e7 e4e5 f6d7 g5e7 d8e7
FEN: rnb1k2r/pppnqppp/4p3/3pP3/3P4/2N5/PPP2PPP/R2QKBNR w KQkq –

ECO: C14
Opening Name: French Defense: Classical Variation, Alapin Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. Bxe7 Qxe7 7. Nb5
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8e7 e4e5 f6d7 g5e7 d8e7 c3b5
FEN: rnb1k2r/pppnqppp/4p3/1N1pP3/3P4/8/PPP2PPP/R2QKBNR b KQkq –

ECO: C14
Opening Name: French Defense: Classical Variation, Pollock Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. Bxe7 Qxe7 7. Qg4
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8e7 e4e5 f6d7 g5e7 d8e7 d1g4
FEN: rnb1k2r/pppnqppp/4p3/3pP3/3P2Q1/2N5/PPP2PPP/R3KBNR b KQkq –

ECO: C14
Opening Name: French Defense: Classical Variation, Rubinstein Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. Bxe7 Qxe7 7. Qd2
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8e7 e4e5 f6d7 g5e7 d8e7 d1d2
FEN: rnb1k2r/pppnqppp/4p3/3pP3/3P4/2N5/PPPQ1PPP/R3KBNR b KQkq –

ECO: C14
Opening Name: French Defense: Classical Variation, Stahlberg Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. Bxe7 Qxe7 7. f4 O-O 8. Nf3 c5 9. Qd2 Nc6 10. O-O-O c4
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8e7 e4e5 f6d7 g5e7 d8e7 f2f4 e8g8 g1f3 c7c5 d1d2 b8c6 e1c1 c5c4
FEN: r1b2rk1/pp1nqppp/2n1p3/3pP3/2pP1P2/2N2N2/PPPQ2PP/2KR1B1R w – –

ECO: C14
Opening Name: French Defense: Classical Variation, Steinitz Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. Bxe7 Qxe7 7. f4
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8e7 e4e5 f6d7 g5e7 d8e7 f2f4
FEN: rnb1k2r/pppnqppp/4p3/3pP3/3P1P2/2N5/PPP3PP/R2QKBNR b KQkq –

ECO: C14
Opening Name: French Defense: Classical Variation, Tarrasch Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. Bxe7 Qxe7 7. Bd3
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8e7 e4e5 f6d7 g5e7 d8e7 f1d3
FEN: rnb1k2r/pppnqppp/4p3/3pP3/3P4/2NB4/PPP2PPP/R2QK1NR b KQkq –

ECO: C15
Opening Name: French Defense: MacCutcheon Variation, Wolf Gambit
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. Ne2 Nf6 5. Bg5
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 g1e2 g8f6 c1g5
FEN: rnbqk2r/ppp2ppp/4pn2/3p2B1/1b1PP3/2N5/PPP1NPPP/R2QKB1R b KQkq –

ECO: C15
Opening Name: French Defense: Winawer Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Bb4
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 f8b4
FEN: rnbqk1nr/ppp2ppp/4p3/3p4/1b1PP3/2N5/PPP2PPP/R1BQKBNR w KQkq –

ECO: C15
Opening Name: French Defense: Winawer Variation, Alekhine Gambit Accepted
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. Ne2 dxe4 5. a3 Bxc3+
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 g1e2 d5e4 a2a3 b4c3
FEN: rnbqk1nr/ppp2ppp/4p3/8/3Pp3/P1b5/1PP1NPPP/R1BQKB1R w KQkq –

ECO: C15
Opening Name: French Defense: Winawer Variation, Alekhine Gambit, Alatortsev Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. Ne2 dxe4 5. a3 Be7 6. Nxe4 Nf6 7. N2g3 O-O 8. Be2 Nc6
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 g1e2 d5e4 a2a3 b4e7 c3e4 g8f6 e2g3 e8g8 f1e2 b8c6
FEN: r1bq1rk1/ppp1bppp/2n1pn2/8/3PN3/P5N1/1PP1BPPP/R1BQK2R w KQ –

ECO: C15
Opening Name: French Defense: Winawer Variation, Alekhine Gambit, Kan Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. Ne2 dxe4 5. a3 Bxc3+ 6. Nxc3 Nc6
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 g1e2 d5e4 a2a3 b4c3 e2c3 b8c6
FEN: r1bqk1nr/ppp2ppp/2n1p3/8/3Pp3/P1N5/1PP2PPP/R1BQKB1R w KQkq –

ECO: C15
Opening Name: French Defense: Winawer Variation, Alekhine-Maróczy Gambit
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. Ne2
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 g1e2
FEN: rnbqk1nr/ppp2ppp/4p3/3p4/1b1PP3/2N5/PPP1NPPP/R1BQKB1R b KQkq –

ECO: C15
Opening Name: French Defense: Winawer Variation, Delayed Exchange Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. exd5
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4d5
FEN: rnbqk1nr/ppp2ppp/4p3/3P4/1b1P4/2N5/PPP2PPP/R1BQKBNR b KQkq –

ECO: C15
Opening Name: French Defense: Winawer Variation, Exchange Variation, Canal Attack
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. exd5 exd5 5. Bd3 Ne7 6. Qh5
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4d5 e6d5 f1d3 g8e7 d1h5
FEN: rnbqk2r/ppp1nppp/8/3p3Q/1b1P4/2NB4/PPP2PPP/R1B1K1NR b KQkq –

ECO: C15
Opening Name: French Defense: Winawer Variation, Fingerslip Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. Bd2
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 c1d2
FEN: rnbqk1nr/ppp2ppp/4p3/3p4/1b1PP3/2N5/PPPB1PPP/R2QKBNR b KQkq –

ECO: C15
Opening Name: French Defense: Winawer Variation, Fingerslip Variation, Kunin Double Gambit
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. Bd2 dxe4 5. Qg4 Qxd4
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 c1d2 d5e4 d1g4 d8d4
FEN: rnb1k1nr/ppp2ppp/4p3/8/1b1qp1Q1/2N5/PPPB1PPP/R3KBNR w KQkq –

ECO: C15
Opening Name: French Defense: Winawer Variation, Fingerslip Variation, Main Line
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. Bd2 dxe4 5. Qg4 Nf6 6. Qxg7 Rg8 7. Qh6
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 c1d2 d5e4 d1g4 g8f6 g4g7 h8g8 g7h6
FEN: rnbqk1r1/ppp2p1p/4pn1Q/8/1b1Pp3/2N5/PPPB1PPP/R3KBNR b KQq –

ECO: C15
Opening Name: French Defense: Winawer Variation, Fingerslip Variation, Schwarz’s Line
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. Bd2 Ne7 5. Nb1
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 c1d2 g8e7 c3b1
FEN: rnbqk2r/ppp1nppp/4p3/3p4/1b1PP3/8/PPPB1PPP/RN1QKBNR b KQkq –

ECO: C15
Opening Name: French Defense: Winawer Variation, Kondratiyev Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. Bd3 c5 5. exd5 Qxd5 6. Bd2
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 f1d3 c7c5 e4d5 d8d5 c1d2
FEN: rnb1k1nr/pp3ppp/4p3/2pq4/1b1P4/2NB4/PPPB1PPP/R2QK1NR b KQkq –

ECO: C15
Opening Name: French Defense: Winawer Variation, Winckelmann-Reimer Gambit
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 dxe4 6. f3
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 a2a3 b4c3 b2c3 d5e4 f2f3
FEN: rnbqk1nr/ppp2ppp/4p3/8/3Pp3/P1P2P2/2P3PP/R1BQKBNR b KQkq –

ECO: C16
Opening Name: French Defense: Winawer Variation, Advance Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5
FEN: rnbqk1nr/ppp2ppp/4p3/3pP3/1b1P4/2N5/PPP2PPP/R1BQKBNR b KQkq –

ECO: C16
Opening Name: French Defense: Winawer Variation, Petrosian Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 Qd7
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 d8d7
FEN: rnb1k1nr/pppq1ppp/4p3/3pP3/1b1P4/2N5/PPP2PPP/R1BQKBNR w KQkq –

ECO: C17
Opening Name: French Defense: Winawer Variation, Advance Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 c7c5
FEN: rnbqk1nr/pp3ppp/4p3/2ppP3/1b1P4/2N5/PPP2PPP/R1BQKBNR w KQkq –

ECO: C17
Opening Name: French Defense: Winawer Variation, Advance Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 c7c5 a2a3
FEN: rnbqk1nr/pp3ppp/4p3/2ppP3/1b1P4/P1N5/1PP2PPP/R1BQKBNR b KQkq –

ECO: C17
Opening Name: French Defense: Winawer Variation, Advance Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 cxd4 6. axb4 dxc3 7. Nf3
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 c7c5 a2a3 c5d4 a3b4 d4c3 g1f3
FEN: rnbqk1nr/pp3ppp/4p3/3pP3/1P6/2p2N2/1PP2PPP/R1BQKB1R b KQkq –

ECO: C17
Opening Name: French Defense: Winawer Variation, Advance Variation, Moscow Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. Qg4
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 c7c5 d1g4
FEN: rnbqk1nr/pp3ppp/4p3/2ppP3/1b1P2Q1/2N5/PPP2PPP/R1B1KBNR b KQkq –

ECO: C17
Opening Name: French Defense: Winawer Variation, Bogoljubow Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. Bd2
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 c7c5 c1d2
FEN: rnbqk1nr/pp3ppp/4p3/2ppP3/1b1P4/2N5/PPPB1PPP/R2QKBNR b KQkq –

ECO: C17
Opening Name: French Defense: Winawer Variation, Bogoljubow Variation, Icelandic Defense
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. Bd2 Ne7 6. f4
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 c7c5 c1d2 g8e7 f2f4
FEN: rnbqk2r/pp2nppp/4p3/2ppP3/1b1P1P2/2N5/PPPB2PP/R2QKBNR b KQkq –

ECO: C17
Opening Name: French Defense: Winawer Variation, Maróczy-Wallis Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 cxd4 6. axb4 dxc3
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 c7c5 a2a3 c5d4 a3b4 d4c3
FEN: rnbqk1nr/pp3ppp/4p3/3pP3/1P6/2p5/1PP2PPP/R1BQKBNR w KQkq –

ECO: C17
Opening Name: French Defense: Winawer Variation, Retreat Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Ba5
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 c7c5 a2a3 b4a5
FEN: rnbqk1nr/pp3ppp/4p3/b1ppP3/3P4/P1N5/1PP2PPP/R1BQKBNR w KQkq –

ECO: C17
Opening Name: French Defense: Winawer Variation, Retreat Variation, Armenian Line
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Ba5 6. b4 cxd4
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 c7c5 a2a3 b4a5 b2b4 c5d4
FEN: rnbqk1nr/pp3ppp/4p3/b2pP3/1P1p4/P1N5/2P2PPP/R1BQKBNR w KQkq –

ECO: C18
Opening Name: French Defense: Winawer Variation, Advance Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 c7c5 a2a3 b4c3 b2c3
FEN: rnbqk1nr/pp3ppp/4p3/2ppP3/3P4/P1P5/2P2PPP/R1BQKBNR b KQkq –

ECO: C18
Opening Name: French Defense: Winawer Variation, Classical Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Qc7
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 c7c5 a2a3 b4c3 b2c3 d8c7
FEN: rnb1k1nr/ppq2ppp/4p3/2ppP3/3P4/P1P5/2P2PPP/R1BQKBNR w KQkq –

ECO: C18
Opening Name: French Defense: Winawer Variation, Portisch-Hook Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Qa5
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 c7c5 a2a3 b4c3 b2c3 d8a5
FEN: rnb1k1nr/pp3ppp/4p3/q1ppP3/3P4/P1P5/2P2PPP/R1BQKBNR w KQkq –

ECO: C19
Opening Name: French Defense: Winawer Variation, Advance Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 c7c5 a2a3 b4c3 b2c3 g8e7
FEN: rnbqk2r/pp2nppp/4p3/2ppP3/3P4/P1P5/2P2PPP/R1BQKBNR w KQkq –

ECO: C19
Opening Name: French Defense: Winawer Variation, Advance Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. a4
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 c7c5 a2a3 b4c3 b2c3 g8e7 a3a4
FEN: rnbqk2r/pp2nppp/4p3/2ppP3/P2P4/2P5/2P2PPP/R1BQKBNR b KQkq –

ECO: C19
Opening Name: French Defense: Winawer Variation, Advance Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. Qg4
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 c7c5 a2a3 b4c3 b2c3 g8e7 d1g4
FEN: rnbqk2r/pp2nppp/4p3/2ppP3/3P2Q1/P1P5/2P2PPP/R1B1KBNR b KQkq –

ECO: C19
Opening Name: French Defense: Winawer Variation, Eingorn Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. Qg4 Kf8
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 c7c5 a2a3 b4c3 b2c3 g8e7 d1g4 e8f8
FEN: rnbq1k1r/pp2nppp/4p3/2ppP3/3P2Q1/P1P5/2P2PPP/R1B1KBNR w KQ –

ECO: C19
Opening Name: French Defense: Winawer Variation, Poisoned Pawn Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. Qg4 Qc7
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 c7c5 a2a3 b4c3 b2c3 g8e7 d1g4 d8c7
FEN: rnb1k2r/ppq1nppp/4p3/2ppP3/3P2Q1/P1P5/2P2PPP/R1B1KBNR w KQkq –

ECO: C19
Opening Name: French Defense: Winawer Variation, Poisoned Pawn Variation, Main Line
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. Qg4 Qc7 8. Qxg7 Rg8 9. Qxh7 cxd4 10. Ne2
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 c7c5 a2a3 b4c3 b2c3 g8e7 d1g4 d8c7 g4g7 h8g8 g7h7 c5d4 g1e2
FEN: rnb1k1r1/ppq1np1Q/4p3/3pP3/3p4/P1P5/2P1NPPP/R1B1KB1R b KQq –

ECO: C19
Opening Name: French Defense: Winawer Variation, Poisoned Pawn Variation, Paoli Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. Qg4 Qc7 8. Qxg7 Rg8 9. Qxh7 cxd4 10. Kd1
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 c7c5 a2a3 b4c3 b2c3 g8e7 d1g4 d8c7 g4g7 h8g8 g7h7 c5d4 e1d1
FEN: rnb1k1r1/ppq1np1Q/4p3/3pP3/3p4/P1P5/2P2PPP/R1BK1BNR b q –

ECO: C19
Opening Name: French Defense: Winawer Variation, Positional Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. Nf3
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 c7c5 a2a3 b4c3 b2c3 g8e7 g1f3
FEN: rnbqk2r/pp2nppp/4p3/2ppP3/3P4/P1P2N2/2P2PPP/R1BQKB1R b KQkq –

ECO: C19
Opening Name: French Defense: Winawer Variation, Warsaw Variation
SAN: 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. Qg4 O-O
UCI: e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 c7c5 a2a3 b4c3 b2c3 g8e7 d1g4 e8g8
FEN: rnbq1rk1/pp2nppp/4p3/2ppP3/3P2Q1/P1P5/2P2PPP/R1B1KBNR w KQ –

ECO: C20
Opening Name: Barnes Opening: Walkerling
SAN: 1. f3 e5 2. e4 Nf6 3. Bc4
UCI: f2f3 e7e5 e2e4 g8f6 f1c4
FEN: rnbqkb1r/pppp1ppp/5n2/4p3/2B1P3/5P2/PPPP2PP/RNBQK1NR b KQkq –

ECO: C20
Opening Name: Bongcloud Attack
SAN: 1. e4 e5 2. Ke2
UCI: e2e4 e7e5 e1e2
FEN: rnbqkbnr/pppp1ppp/8/4p3/4P3/8/PPPPKPPP/RNBQ1BNR b kq –

ECO: C20
Opening Name: Center Game
SAN: 1. e4 e5 2. d4
UCI: e2e4 e7e5 d2d4
FEN: rnbqkbnr/pppp1ppp/8/4p3/3PP3/8/PPP2PPP/RNBQKBNR b KQkq –

ECO: C20
Opening Name: Double Bongcloud Attack
SAN: 1. e4 e5 2. Ke2 Ke7
UCI: e2e4 e7e5 e1e2 e8e7
FEN: rnbq1bnr/ppppkppp/8/4p3/4P3/8/PPPPKPPP/RNBQ1BNR w – –

ECO: C20
Opening Name: English Opening: The Whale
SAN: 1. e4 e5 2. c4
UCI: e2e4 e7e5 c2c4
FEN: rnbqkbnr/pppp1ppp/8/4p3/2P1P3/8/PP1P1PPP/RNBQKBNR b KQkq –

ECO: C20
Opening Name: King’s Pawn Game
SAN: 1. e4 e5
UCI: e2e4 e7e5
FEN: rnbqkbnr/pppp1ppp/8/4p3/4P3/8/PPPP1PPP/RNBQKBNR w KQkq –

ECO: C20
Opening Name: King’s Pawn Game: Alapin Opening
SAN: 1. e4 e5 2. Ne2
UCI: e2e4 e7e5 g1e2
FEN: rnbqkbnr/pppp1ppp/8/4p3/4P3/8/PPPPNPPP/RNBQKB1R b KQkq –

ECO: C20
Opening Name: King’s Pawn Game: Bavarian Gambit
SAN: 1. e4 e5 2. c4 d5
UCI: e2e4 e7e5 c2c4 d7d5
FEN: rnbqkbnr/ppp2ppp/8/3pp3/2P1P3/8/PP1P1PPP/RNBQKBNR w KQkq –

ECO: C20
Opening Name: King’s Pawn Game: Beyer Gambit
SAN: 1. e4 e5 2. d4 d5
UCI: e2e4 e7e5 d2d4 d7d5
FEN: rnbqkbnr/ppp2ppp/8/3pp3/3PP3/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: C20
Opening Name: King’s Pawn Game: Clam Variation, King’s Gambit Reversed
SAN: 1. e4 e5 2. d3 f5
UCI: e2e4 e7e5 d2d3 f7f5
FEN: rnbqkbnr/pppp2pp/8/4pp2/4P3/3P4/PPP2PPP/RNBQKBNR w KQkq –

ECO: C20
Opening Name: King’s Pawn Game: Clam Variation, Radisch Gambit
SAN: 1. e4 e5 2. d3 Nf6 3. f4 Bc5
UCI: e2e4 e7e5 d2d3 g8f6 f2f4 f8c5
FEN: rnbqk2r/pppp1ppp/5n2/2b1p3/4PP2/3P4/PPP3PP/RNBQKBNR w KQkq –

ECO: C20
Opening Name: King’s Pawn Game: King’s Head Opening
SAN: 1. e4 e5 2. f3
UCI: e2e4 e7e5 f2f3
FEN: rnbqkbnr/pppp1ppp/8/4p3/4P3/5P2/PPPP2PP/RNBQKBNR b KQkq –

ECO: C20
Opening Name: King’s Pawn Game: King’s Head Opening
SAN: 1. e4 e5 2. f3 Nf6 3. Nc3
UCI: e2e4 e7e5 f2f3 g8f6 b1c3
FEN: rnbqkb1r/pppp1ppp/5n2/4p3/4P3/2N2P2/PPPP2PP/R1BQKBNR b KQkq –

ECO: C20
Opening Name: King’s Pawn Game: Leonardis Variation
SAN: 1. e4 e5 2. d3
UCI: e2e4 e7e5 d2d3
FEN: rnbqkbnr/pppp1ppp/8/4p3/4P3/3P4/PPP2PPP/RNBQKBNR b KQkq –

ECO: C20
Opening Name: King’s Pawn Game: MacLeod Attack
SAN: 1. e4 e5 2. c3
UCI: e2e4 e7e5 c2c3
FEN: rnbqkbnr/pppp1ppp/8/4p3/4P3/2P5/PP1P1PPP/RNBQKBNR b KQkq –

ECO: C20
Opening Name: King’s Pawn Game: MacLeod Attack, Lasa Gambit
SAN: 1. e4 e5 2. c3 f5
UCI: e2e4 e7e5 c2c3 f7f5
FEN: rnbqkbnr/pppp2pp/8/4pp2/4P3/2P5/PP1P1PPP/RNBQKBNR w KQkq –

ECO: C20
Opening Name: King’s Pawn Game: MacLeod Attack, Norwalde Gambit
SAN: 1. e4 e5 2. c3 d5 3. Qh5 Bd6
UCI: e2e4 e7e5 c2c3 d7d5 d1h5 f8d6
FEN: rnbqk1nr/ppp2ppp/3b4/3pp2Q/4P3/2P5/PP1P1PPP/RNB1KBNR w KQkq –

ECO: C20
Opening Name: King’s Pawn Game: Mengarini’s Opening
SAN: 1. e4 e5 2. a3
UCI: e2e4 e7e5 a2a3
FEN: rnbqkbnr/pppp1ppp/8/4p3/4P3/P7/1PPP1PPP/RNBQKBNR b KQkq –

ECO: C20
Opening Name: King’s Pawn Game: Napoleon Attack
SAN: 1. e4 e5 2. Qf3
UCI: e2e4 e7e5 d1f3
FEN: rnbqkbnr/pppp1ppp/8/4p3/4P3/5Q2/PPPP1PPP/RNB1KBNR b KQkq –

ECO: C20
Opening Name: King’s Pawn Game: Philidor Gambit
SAN: 1. e4 e5 2. d4 d6 3. dxe5 Bd7
UCI: e2e4 e7e5 d2d4 d7d6 d4e5 c8d7
FEN: rn1qkbnr/pppb1ppp/3p4/4P3/4P3/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: C20
Opening Name: King’s Pawn Game: Tortoise Opening
SAN: 1. e4 e5 2. Bd3
UCI: e2e4 e7e5 f1d3
FEN: rnbqkbnr/pppp1ppp/8/4p3/4P3/3B4/PPPP1PPP/RNBQK1NR b KQkq –

ECO: C20
Opening Name: King’s Pawn Game: Wayward Queen Attack
SAN: 1. e4 e5 2. Qh5
UCI: e2e4 e7e5 d1h5
FEN: rnbqkbnr/pppp1ppp/8/4p2Q/4P3/8/PPPP1PPP/RNB1KBNR b KQkq –

ECO: C20
Opening Name: King’s Pawn Game: Wayward Queen Attack, Kiddie Countergambit
SAN: 1. e4 e5 2. Qh5 Nf6
UCI: e2e4 e7e5 d1h5 g8f6
FEN: rnbqkb1r/pppp1ppp/5n2/4p2Q/4P3/8/PPPP1PPP/RNB1KBNR w KQkq –

ECO: C20
Opening Name: King’s Pawn Game: Wayward Queen Attack, Mellon Gambit
SAN: 1. e4 e5 2. Qh5 Nc6 3. Bc4 Nh6 4. d3 g6 5. Qf3 f6 6. Ne2 d5
UCI: e2e4 e7e5 d1h5 b8c6 f1c4 g8h6 d2d3 g7g6 h5f3 f7f6 g1e2 d7d5
FEN: r1bqkb1r/ppp4p/2n2ppn/3pp3/2B1P3/3P1Q2/PPP1NPPP/RNB1K2R w KQkq –

ECO: C20
Opening Name: King’s Pawn Game: Weber Gambit
SAN: 1. e4 e5 2. d3 d5 3. exd5 c6 4. dxc6 Nxc6
UCI: e2e4 e7e5 d2d3 d7d5 e4d5 c7c6 d5c6 b8c6
FEN: r1bqkbnr/pp3ppp/2n5/4p3/8/3P4/PPP2PPP/RNBQKBNR w KQkq –

ECO: C20
Opening Name: King’s Pawn Opening
SAN: 1. e4 e5 2. b3
UCI: e2e4 e7e5 b2b3
FEN: rnbqkbnr/pppp1ppp/8/4p3/4P3/1P6/P1PP1PPP/RNBQKBNR b KQkq –

ECO: C20
Opening Name: King’s Pawn Opening: Speers
SAN: 1. e4 e5 2. Qg4 Nf6 3. Qf5
UCI: e2e4 e7e5 d1g4 g8f6 g4f5
FEN: rnbqkb1r/pppp1ppp/5n2/4pQ2/4P3/8/PPPP1PPP/RNB1KBNR b KQkq –

ECO: C20
Opening Name: King’s Pawn Opening: Van Hooydoon Gambit
SAN: 1. e4 e5 2. Qe2 Nc6 3. c3 Nf6 4. Nf3 Bc5 5. d4 exd4 6. cxd4 Nxd4
UCI: e2e4 e7e5 d1e2 b8c6 c2c3 g8f6 g1f3 f8c5 d2d4 e5d4 c3d4 c6d4
FEN: r1bqk2r/pppp1ppp/5n2/2b5/3nP3/5N2/PP2QPPP/RNB1KB1R w KQkq –

ECO: C20
Opening Name: Portuguese Opening
SAN: 1. e4 e5 2. Bb5
UCI: e2e4 e7e5 f1b5
FEN: rnbqkbnr/pppp1ppp/8/1B2p3/4P3/8/PPPP1PPP/RNBQK1NR b KQkq –

ECO: C20
Opening Name: Portuguese Opening: Miguel Gambit
SAN: 1. e4 e5 2. Bb5 Bc5 3. b4
UCI: e2e4 e7e5 f1b5 f8c5 b2b4
FEN: rnbqk1nr/pppp1ppp/8/1Bb1p3/1P2P3/8/P1PP1PPP/RNBQK1NR b KQkq –

ECO: C20
Opening Name: Portuguese Opening: Portuguese Gambit
SAN: 1. e4 e5 2. Bb5 Nf6 3. d4
UCI: e2e4 e7e5 f1b5 g8f6 d2d4
FEN: rnbqkb1r/pppp1ppp/5n2/1B2p3/3PP3/8/PPP2PPP/RNBQK1NR b KQkq –

ECO: C21
Opening Name: Center Game
SAN: 1. e4 e5 2. d4 exd4 3. Qxd4
UCI: e2e4 e7e5 d2d4 e5d4 d1d4
FEN: rnbqkbnr/pppp1ppp/8/8/3QP3/8/PPP2PPP/RNB1KBNR b KQkq –

ECO: C21
Opening Name: Center Game Accepted
SAN: 1. e4 e5 2. d4 exd4
UCI: e2e4 e7e5 d2d4 e5d4
FEN: rnbqkbnr/pppp1ppp/8/8/3pP3/8/PPP2PPP/RNBQKBNR w KQkq –

ECO: C21
Opening Name: Center Game: Halasz-McDonnell Gambit
SAN: 1. e4 e5 2. d4 exd4 3. f4
UCI: e2e4 e7e5 d2d4 e5d4 f2f4
FEN: rnbqkbnr/pppp1ppp/8/8/3pPP2/8/PPP3PP/RNBQKBNR b KQkq –

ECO: C21
Opening Name: Center Game: Halasz-McDonnell Gambit, Crocodile Variation
SAN: 1. e4 e5 2. d4 exd4 3. f4 Bc5 4. Nf3 Nc6 5. c3
UCI: e2e4 e7e5 d2d4 e5d4 f2f4 f8c5 g1f3 b8c6 c2c3
FEN: r1bqk1nr/pppp1ppp/2n5/2b5/3pPP2/2P2N2/PP4PP/RNBQKB1R b KQkq –

ECO: C21
Opening Name: Center Game: Kieseritzky Variation
SAN: 1. e4 e5 2. d4 exd4 3. Nf3
UCI: e2e4 e7e5 d2d4 e5d4 g1f3
FEN: rnbqkbnr/pppp1ppp/8/8/3pP3/5N2/PPP2PPP/RNBQKB1R b KQkq –

ECO: C21
Opening Name: Center Game: Kieseritzky Variation
SAN: 1. e4 e5 2. d4 exd4 3. Nf3 c5
UCI: e2e4 e7e5 d2d4 e5d4 g1f3 c7c5
FEN: rnbqkbnr/pp1p1ppp/8/2p5/3pP3/5N2/PPP2PPP/RNBQKB1R w KQkq –

ECO: C21
Opening Name: Center Game: Kieseritzky Variation
SAN: 1. e4 e5 2. d4 exd4 3. Nf3 c5 4. Bc4
UCI: e2e4 e7e5 d2d4 e5d4 g1f3 c7c5 f1c4
FEN: rnbqkbnr/pp1p1ppp/8/2p5/2BpP3/5N2/PPP2PPP/RNBQK2R b KQkq –

ECO: C21
Opening Name: Center Game: Lanc-Arnold Gambit
SAN: 1. e4 e5 2. d4 exd4 3. Nf3 Bc5 4. c3
UCI: e2e4 e7e5 d2d4 e5d4 g1f3 f8c5 c2c3
FEN: rnbqk1nr/pppp1ppp/8/2b5/3pP3/2P2N2/PP3PPP/RNBQKB1R b KQkq –

ECO: C21
Opening Name: Center Game: Lanc-Arnold Gambit, Schippler Gambit
SAN: 1. e4 e5 2. d4 exd4 3. Nf3 Bc5 4. c3 dxc3 5. Bc4
UCI: e2e4 e7e5 d2d4 e5d4 g1f3 f8c5 c2c3 d4c3 f1c4
FEN: rnbqk1nr/pppp1ppp/8/2b5/2B1P3/2p2N2/PP3PPP/RNBQK2R b KQkq –

ECO: C21
Opening Name: Center Game: Ross Gambit
SAN: 1. e4 e5 2. d4 exd4 3. Bd3
UCI: e2e4 e7e5 d2d4 e5d4 f1d3
FEN: rnbqkbnr/pppp1ppp/8/8/3pP3/3B4/PPP2PPP/RNBQK1NR b KQkq –

ECO: C21
Opening Name: Center Game: von der Lasa Gambit
SAN: 1. e4 e5 2. d4 exd4 3. Bc4
UCI: e2e4 e7e5 d2d4 e5d4 f1c4
FEN: rnbqkbnr/pppp1ppp/8/8/2BpP3/8/PPP2PPP/RNBQK1NR b KQkq –

ECO: C21
Opening Name: Danish Gambit
SAN: 1. e4 e5 2. d4 exd4 3. c3
UCI: e2e4 e7e5 d2d4 e5d4 c2c3
FEN: rnbqkbnr/pppp1ppp/8/8/3pP3/2P5/PP3PPP/RNBQKBNR b KQkq –

ECO: C21
Opening Name: Danish Gambit Accepted
SAN: 1. e4 e5 2. d4 exd4 3. c3 dxc3
UCI: e2e4 e7e5 d2d4 e5d4 c2c3 d4c3
FEN: rnbqkbnr/pppp1ppp/8/8/4P3/2p5/PP3PPP/RNBQKBNR w KQkq –

ECO: C21
Opening Name: Danish Gambit Accepted: Chigorin Defense
SAN: 1. e4 e5 2. d4 exd4 3. c3 dxc3 4. Bc4 cxb2 5. Bxb2 Qe7
UCI: e2e4 e7e5 d2d4 e5d4 c2c3 d4c3 f1c4 c3b2 c1b2 d8e7
FEN: rnb1kbnr/ppppqppp/8/8/2B1P3/8/PB3PPP/RN1QK1NR w KQkq –

ECO: C21
Opening Name: Danish Gambit Accepted: Classical Defense
SAN: 1. e4 e5 2. d4 exd4 3. c3 dxc3 4. Bc4 cxb2 5. Bxb2 Nf6
UCI: e2e4 e7e5 d2d4 e5d4 c2c3 d4c3 f1c4 c3b2 c1b2 g8f6
FEN: rnbqkb1r/pppp1ppp/5n2/8/2B1P3/8/PB3PPP/RN1QK1NR w KQkq –

ECO: C21
Opening Name: Danish Gambit Accepted: Copenhagen Defense
SAN: 1. e4 e5 2. d4 exd4 3. c3 dxc3 4. Bc4 cxb2 5. Bxb2 Bb4+
UCI: e2e4 e7e5 d2d4 e5d4 c2c3 d4c3 f1c4 c3b2 c1b2 f8b4
FEN: rnbqk1nr/pppp1ppp/8/8/1bB1P3/8/PB3PPP/RN1QK1NR w KQkq –

ECO: C21
Opening Name: Danish Gambit Accepted: Schlechter Defense
SAN: 1. e4 e5 2. d4 exd4 3. c3 dxc3 4. Bc4 cxb2 5. Bxb2 d5
UCI: e2e4 e7e5 d2d4 e5d4 c2c3 d4c3 f1c4 c3b2 c1b2 d7d5
FEN: rnbqkbnr/ppp2ppp/8/3p4/2B1P3/8/PB3PPP/RN1QK1NR w KQkq –

ECO: C21
Opening Name: Danish Gambit Accepted: Svenonius Defense
SAN: 1. e4 e5 2. d4 exd4 3. c3 Ne7
UCI: e2e4 e7e5 d2d4 e5d4 c2c3 g8e7
FEN: rnbqkb1r/ppppnppp/8/8/3pP3/2P5/PP3PPP/RNBQKBNR w KQkq –

ECO: C21
Opening Name: Danish Gambit Declined: Sörensen Defense
SAN: 1. e4 e5 2. d4 exd4 3. c3 d5
UCI: e2e4 e7e5 d2d4 e5d4 c2c3 d7d5
FEN: rnbqkbnr/ppp2ppp/8/3p4/3pP3/2P5/PP3PPP/RNBQKBNR w KQkq –

ECO: C22
Opening Name: Center Game: Berger Variation
SAN: 1. e4 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qe3 Nf6
UCI: e2e4 e7e5 d2d4 e5d4 d1d4 b8c6 d4e3 g8f6
FEN: r1bqkb1r/pppp1ppp/2n2n2/8/4P3/4Q3/PPP2PPP/RNB1KBNR w KQkq –

ECO: C22
Opening Name: Center Game: Charousek Variation
SAN: 1. e4 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qe3 Bb4+ 5. c3 Be7
UCI: e2e4 e7e5 d2d4 e5d4 d1d4 b8c6 d4e3 f8b4 c2c3 b4e7
FEN: r1bqk1nr/ppppbppp/2n5/8/4P3/2P1Q3/PP3PPP/RNB1KBNR w KQkq –

ECO: C22
Opening Name: Center Game: Hall Variation
SAN: 1. e4 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qc4
UCI: e2e4 e7e5 d2d4 e5d4 d1d4 b8c6 d4c4
FEN: r1bqkbnr/pppp1ppp/2n5/8/2Q1P3/8/PPP2PPP/RNB1KBNR b KQkq –

ECO: C22
Opening Name: Center Game: Kupreichik Variation
SAN: 1. e4 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qe3 Nf6 5. Nc3 Bb4 6. Bd2 O-O 7. O-O-O Re8 8. Bc4 d6 9. Nh3
UCI: e2e4 e7e5 d2d4 e5d4 d1d4 b8c6 d4e3 g8f6 b1c3 f8b4 c1d2 e8g8 e1c1 f8e8 f1c4 d7d6 g1h3
FEN: r1bqr1k1/ppp2ppp/2np1n2/8/1bB1P3/2N1Q2N/PPPB1PPP/2KR3R b – –

ECO: C22
Opening Name: Center Game: Normal Variation
SAN: 1. e4 e5 2. d4 exd4 3. Qxd4 Nc6
UCI: e2e4 e7e5 d2d4 e5d4 d1d4 b8c6
FEN: r1bqkbnr/pppp1ppp/2n5/8/3QP3/8/PPP2PPP/RNB1KBNR w KQkq –

ECO: C22
Opening Name: Center Game: Paulsen Attack Variation
SAN: 1. e4 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qe3
UCI: e2e4 e7e5 d2d4 e5d4 d1d4 b8c6 d4e3
FEN: r1bqkbnr/pppp1ppp/2n5/8/4P3/4Q3/PPP2PPP/RNB1KBNR b KQkq –

ECO: C22
Opening Name: Center Game: l’Hermet Variation
SAN: 1. e4 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qe3 f5
UCI: e2e4 e7e5 d2d4 e5d4 d1d4 b8c6 d4e3 f7f5
FEN: r1bqkbnr/pppp2pp/2n5/5p2/4P3/4Q3/PPP2PPP/RNB1KBNR w KQkq –

ECO: C23
Opening Name: Bishop’s Opening
SAN: 1. e4 e5 2. Bc4
UCI: e2e4 e7e5 f1c4
FEN: rnbqkbnr/pppp1ppp/8/4p3/2B1P3/8/PPPP1PPP/RNBQK1NR b KQkq –

ECO: C23
Opening Name: Bishop’s Opening: Anderssen Gambit
SAN: 1. e4 e5 2. Bc4 b5 3. Bxb5 c6
UCI: e2e4 e7e5 f1c4 b7b5 c4b5 c7c6
FEN: rnbqkbnr/p2p1ppp/2p5/1B2p3/4P3/8/PPPP1PPP/RNBQK1NR w KQkq –

ECO: C23
Opening Name: Bishop’s Opening: Boi Variation
SAN: 1. e4 e5 2. Bc4 Bc5
UCI: e2e4 e7e5 f1c4 f8c5
FEN: rnbqk1nr/pppp1ppp/8/2b1p3/2B1P3/8/PPPP1PPP/RNBQK1NR w KQkq –

ECO: C23
Opening Name: Bishop’s Opening: Calabrese Countergambit
SAN: 1. e4 e5 2. Bc4 f5
UCI: e2e4 e7e5 f1c4 f7f5
FEN: rnbqkbnr/pppp2pp/8/4pp2/2B1P3/8/PPPP1PPP/RNBQK1NR w KQkq –

ECO: C23
Opening Name: Bishop’s Opening: Calabrese Countergambit, Jaenisch Variation
SAN: 1. e4 e5 2. Bc4 f5 3. d3
UCI: e2e4 e7e5 f1c4 f7f5 d2d3
FEN: rnbqkbnr/pppp2pp/8/4pp2/2B1P3/3P4/PPP2PPP/RNBQK1NR b KQkq –

ECO: C23
Opening Name: Bishop’s Opening: Four Pawns Gambit
SAN: 1. e4 e5 2. Bc4 Bc5 3. b4 Bxb4 4. f4 exf4 5. Nf3 Be7 6. d4 Bh4+ 7. g3 fxg3 8. O-O gxh2+ 9. Kh1
UCI: e2e4 e7e5 f1c4 f8c5 b2b4 c5b4 f2f4 e5f4 g1f3 b4e7 d2d4 e7h4 g2g3 f4g3 e1g1 g3h2 g1h1
FEN: rnbqk1nr/pppp1ppp/8/8/2BPP2b/5N2/P1P4p/RNBQ1R1K b kq –

ECO: C23
Opening Name: Bishop’s Opening: Khan Gambit
SAN: 1. e4 e5 2. Bc4 d5
UCI: e2e4 e7e5 f1c4 d7d5
FEN: rnbqkbnr/ppp2ppp/8/3pp3/2B1P3/8/PPPP1PPP/RNBQK1NR w KQkq –

ECO: C23
Opening Name: Bishop’s Opening: Lewis Countergambit
SAN: 1. e4 e5 2. Bc4 Bc5 3. c3 d5
UCI: e2e4 e7e5 f1c4 f8c5 c2c3 d7d5
FEN: rnbqk1nr/ppp2ppp/8/2bpp3/2B1P3/2P5/PP1P1PPP/RNBQK1NR w KQkq –

ECO: C23
Opening Name: Bishop’s Opening: Lewis Countergambit
SAN: 1. e4 e5 2. Bc4 Bc5 3. c3 d5 4. Bxd5 Nf6
UCI: e2e4 e7e5 f1c4 f8c5 c2c3 d7d5 c4d5 g8f6
FEN: rnbqk2r/ppp2ppp/5n2/2bBp3/4P3/2P5/PP1P1PPP/RNBQK1NR w KQkq –

ECO: C23
Opening Name: Bishop’s Opening: Lewis Countergambit, Walker Variation
SAN: 1. e4 e5 2. Bc4 Bc5 3. c3 d5 4. Bxd5 Nf6 5. d4
UCI: e2e4 e7e5 f1c4 f8c5 c2c3 d7d5 c4d5 g8f6 d2d4
FEN: rnbqk2r/ppp2ppp/5n2/2bBp3/3PP3/2P5/PP3PPP/RNBQK1NR b KQkq –

ECO: C23
Opening Name: Bishop’s Opening: Lewis Gambit
SAN: 1. e4 e5 2. Bc4 Bc5 3. d4
UCI: e2e4 e7e5 f1c4 f8c5 d2d4
FEN: rnbqk1nr/pppp1ppp/8/2b1p3/2BPP3/8/PPP2PPP/RNBQK1NR b KQkq –

ECO: C23
Opening Name: Bishop’s Opening: Lisitsyn Variation
SAN: 1. e4 e5 2. Bc4 c6 3. d4 d5 4. exd5 cxd5 5. Bb5+ Bd7 6. Bxd7+ Nxd7 7. dxe5 Nxe5 8. Ne2
UCI: e2e4 e7e5 f1c4 c7c6 d2d4 d7d5 e4d5 c6d5 c4b5 c8d7 b5d7 b8d7 d4e5 d7e5 g1e2
FEN: r2qkbnr/pp3ppp/8/3pn3/8/8/PPP1NPPP/RNBQK2R b KQkq –

ECO: C23
Opening Name: Bishop’s Opening: Lopez Gambit
SAN: 1. e4 e5 2. Bc4 Bc5 3. Qe2 Nc6 4. c3 Nf6 5. f4
UCI: e2e4 e7e5 f1c4 f8c5 d1e2 b8c6 c2c3 g8f6 f2f4
FEN: r1bqk2r/pppp1ppp/2n2n2/2b1p3/2B1PP2/2P5/PP1PQ1PP/RNB1K1NR b KQkq –

ECO: C23
Opening Name: Bishop’s Opening: Lopez Variation
SAN: 1. e4 e5 2. Bc4 Bc5 3. Qe2
UCI: e2e4 e7e5 f1c4 f8c5 d1e2
FEN: rnbqk1nr/pppp1ppp/8/2b1p3/2B1P3/8/PPPPQPPP/RNB1K1NR b KQkq –

ECO: C23
Opening Name: Bishop’s Opening: Lopez Variation, Lopez Gambit
SAN: 1. e4 e5 2. Bc4 Bc5 3. Qe2 Nf6 4. f4
UCI: e2e4 e7e5 f1c4 f8c5 d1e2 g8f6 f2f4
FEN: rnbqk2r/pppp1ppp/5n2/2b1p3/2B1PP2/8/PPPPQ1PP/RNB1K1NR b KQkq –

ECO: C23
Opening Name: Bishop’s Opening: McDonnell Gambit
SAN: 1. e4 e5 2. Bc4 Bc5 3. b4
UCI: e2e4 e7e5 f1c4 f8c5 b2b4
FEN: rnbqk1nr/pppp1ppp/8/2b1p3/1PB1P3/8/P1PP1PPP/RNBQK1NR b KQkq –

ECO: C23
Opening Name: Bishop’s Opening: McDonnell Gambit, La Bourdonnais-Denker Gambit
SAN: 1. e4 e5 2. Bc4 Bc5 3. b4 Bxb4 4. c3
UCI: e2e4 e7e5 f1c4 f8c5 b2b4 c5b4 c2c3
FEN: rnbqk1nr/pppp1ppp/8/4p3/1bB1P3/2P5/P2P1PPP/RNBQK1NR b KQkq –

ECO: C23
Opening Name: Bishop’s Opening: McDonnell Gambit, McDonnell Double Gambit
SAN: 1. e4 e5 2. Bc4 Bc5 3. b4 Bxb4 4. f4
UCI: e2e4 e7e5 f1c4 f8c5 b2b4 c5b4 f2f4
FEN: rnbqk1nr/pppp1ppp/8/4p3/1bB1PP2/8/P1PP2PP/RNBQK1NR b KQkq –

ECO: C23
Opening Name: Bishop’s Opening: Philidor Counterattack
SAN: 1. e4 e5 2. Bc4 c6
UCI: e2e4 e7e5 f1c4 c7c6
FEN: rnbqkbnr/pp1p1ppp/2p5/4p3/2B1P3/8/PPPP1PPP/RNBQK1NR w KQkq –

ECO: C23
Opening Name: Bishop’s Opening: Philidor Variation
SAN: 1. e4 e5 2. Bc4 Bc5 3. c3
UCI: e2e4 e7e5 f1c4 f8c5 c2c3
FEN: rnbqk1nr/pppp1ppp/8/2b1p3/2B1P3/2P5/PP1P1PPP/RNBQK1NR b KQkq –

ECO: C23
Opening Name: Bishop’s Opening: Pratt Variation
SAN: 1. e4 e5 2. Bc4 Bc5 3. c3 Nf6 4. d4 exd4 5. e5 d5 6. exf6 dxc4 7. Qh5 O-O
UCI: e2e4 e7e5 f1c4 f8c5 c2c3 g8f6 d2d4 e5d4 e4e5 d7d5 e5f6 d5c4 d1h5 e8g8
FEN: rnbq1rk1/ppp2ppp/5P2/2b4Q/2pp4/2P5/PP3PPP/RNB1K1NR w KQ –

ECO: C23
Opening Name: Bishop’s Opening: Stein Gambit
SAN: 1. e4 e5 2. Bc4 Bc5 3. f4
UCI: e2e4 e7e5 f1c4 f8c5 f2f4
FEN: rnbqk1nr/pppp1ppp/8/2b1p3/2B1PP2/8/PPPP2PP/RNBQK1NR b KQkq –

ECO: C23
Opening Name: Bishop’s Opening: Thorold Gambit
SAN: 1. e4 e5 2. Bc4 b5 3. Bxb5 f5
UCI: e2e4 e7e5 f1c4 b7b5 c4b5 f7f5
FEN: rnbqkbnr/p1pp2pp/8/1B2pp2/4P3/8/PPPP1PPP/RNBQK1NR w KQkq –

ECO: C23
Opening Name: Bishop’s Opening: del Rio Variation
SAN: 1. e4 e5 2. Bc4 Bc5 3. c3 Qg5
UCI: e2e4 e7e5 f1c4 f8c5 c2c3 d8g5
FEN: rnb1k1nr/pppp1ppp/8/2b1p1q1/2B1P3/2P5/PP1P1PPP/RNBQK1NR w KQkq –

ECO: C24
Opening Name: Bishop’s Opening: Berlin Defense
SAN: 1. e4 e5 2. Bc4 Nf6
UCI: e2e4 e7e5 f1c4 g8f6
FEN: rnbqkb1r/pppp1ppp/5n2/4p3/2B1P3/8/PPPP1PPP/RNBQK1NR w KQkq –

ECO: C24
Opening Name: Bishop’s Opening: Berlin Defense, Greco Gambit
SAN: 1. e4 e5 2. Bc4 Nf6 3. f4
UCI: e2e4 e7e5 f1c4 g8f6 f2f4
FEN: rnbqkb1r/pppp1ppp/5n2/4p3/2B1PP2/8/PPPP2PP/RNBQK1NR b KQkq –

ECO: C24
Opening Name: Bishop’s Opening: Kitchener Folly
SAN: 1. e4 e5 2. Bc4 Nf6 3. d3 Be7 4. Nf3 O-O
UCI: e2e4 e7e5 f1c4 g8f6 d2d3 f8e7 g1f3 e8g8
FEN: rnbq1rk1/ppppbppp/5n2/4p3/2B1P3/3P1N2/PPP2PPP/RNBQK2R w KQ –

ECO: C24
Opening Name: Bishop’s Opening: Krejcik Gambit
SAN: 1. e4 e5 2. Bc4 Nf6 3. f3 Bc5 4. Ne2 Nc6 5. b4
UCI: e2e4 e7e5 f1c4 g8f6 f2f3 f8c5 g1e2 b8c6 b2b4
FEN: r1bqk2r/pppp1ppp/2n2n2/2b1p3/1PB1P3/5P2/P1PPN1PP/RNBQK2R b KQkq –

ECO: C24
Opening Name: Bishop’s Opening: Pachman Gambit
SAN: 1. e4 e5 2. Bc4 Nf6 3. Ne2 Nxe4 4. Nec3
UCI: e2e4 e7e5 f1c4 g8f6 g1e2 f6e4 e2c3
FEN: rnbqkb1r/pppp1ppp/8/4p3/2B1n3/2N5/PPPP1PPP/RNBQK2R b KQkq –

ECO: C24
Opening Name: Bishop’s Opening: Ponziani Gambit
SAN: 1. e4 e5 2. Bc4 Nf6 3. d4
UCI: e2e4 e7e5 f1c4 g8f6 d2d4
FEN: rnbqkb1r/pppp1ppp/5n2/4p3/2BPP3/8/PPP2PPP/RNBQK1NR b KQkq –

ECO: C24
Opening Name: Bishop’s Opening: Urusov Gambit, Panov Variation
SAN: 1. e4 e5 2. Bc4 Nf6 3. d4 exd4 4. Nf3 d5 5. exd5 Bb4+ 6. c3 Qe7+
UCI: e2e4 e7e5 f1c4 g8f6 d2d4 e5d4 g1f3 d7d5 e4d5 f8b4 c2c3 d8e7
FEN: rnb1k2r/ppp1qppp/5n2/3P4/1bBp4/2P2N2/PP3PPP/RNBQK2R w KQkq –

ECO: C24
Opening Name: Bishop’s Opening: Vienna Hybrid
SAN: 1. e4 e5 2. Bc4 Nf6 3. d3 Nc6 4. Nc3
UCI: e2e4 e7e5 f1c4 g8f6 d2d3 b8c6 b1c3
FEN: r1bqkb1r/pppp1ppp/2n2n2/4p3/2B1P3/2NP4/PPP2PPP/R1BQK1NR b KQkq –

ECO: C24
Opening Name: Bishop’s Opening: Warsaw Gambit
SAN: 1. e4 e5 2. Bc4 Nf6 3. d4 exd4 4. c3
UCI: e2e4 e7e5 f1c4 g8f6 d2d4 e5d4 c2c3
FEN: rnbqkb1r/pppp1ppp/5n2/8/2BpP3/2P5/PP3PPP/RNBQK1NR b KQkq –

ECO: C25
Opening Name: Vienna Gambit, with Max Lange Defense
SAN: 1. e4 e5 2. Nc3 Nc6 3. f4
UCI: e2e4 e7e5 b1c3 b8c6 f2f4
FEN: r1bqkbnr/pppp1ppp/2n5/4p3/4PP2/2N5/PPPP2PP/R1BQKBNR b KQkq –

ECO: C25
Opening Name: Vienna Gambit, with Max Lange Defense: Cunningham Defense
SAN: 1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. Nf3 Be7
UCI: e2e4 e7e5 b1c3 b8c6 f2f4 e5f4 g1f3 f8e7
FEN: r1bqk1nr/ppppbppp/2n5/8/4Pp2/2N2N2/PPPP2PP/R1BQKB1R w KQkq –

ECO: C25
Opening Name: Vienna Gambit, with Max Lange Defense: Hamppe-Allgaier Gambit
SAN: 1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. Nf3 g5 5. h4 g4 6. Ng5
UCI: e2e4 e7e5 b1c3 b8c6 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3g5
FEN: r1bqkbnr/pppp1p1p/2n5/6N1/4PppP/2N5/PPPP2P1/R1BQKB1R b KQkq –

ECO: C25
Opening Name: Vienna Gambit, with Max Lange Defense: Hamppe-Allgaier Gambit, Alapin Variation
SAN: 1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. Nf3 g5 5. h4 g4 6. Ng5 d6
UCI: e2e4 e7e5 b1c3 b8c6 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3g5 d7d6
FEN: r1bqkbnr/ppp2p1p/2np4/6N1/4PppP/2N5/PPPP2P1/R1BQKB1R w KQkq –

ECO: C25
Opening Name: Vienna Gambit, with Max Lange Defense: Hamppe-Allgaier Gambit, Thorold Variation
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 Nc6 4. Nc3 g5 5. h4 g4 6. Ng5 h6 7. Nxf7 Kxf7 8. d4
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 b8c6 b1c3 g7g5 h2h4 g5g4 f3g5 h7h6 g5f7 e8f7 d2d4
FEN: r1bq1bnr/pppp1k2/2n4p/8/3PPppP/2N5/PPP3P1/R1BQKB1R b KQ –

ECO: C25
Opening Name: Vienna Gambit, with Max Lange Defense: Hamppe-Muzio Gambit
SAN: 1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. Nf3 g5 5. Bc4 g4 6. O-O gxf3
UCI: e2e4 e7e5 b1c3 b8c6 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 e1g1 g4f3
FEN: r1bqkbnr/pppp1p1p/2n5/8/2B1Pp2/2N2p2/PPPP2PP/R1BQ1RK1 w kq –

ECO: C25
Opening Name: Vienna Gambit, with Max Lange Defense: Knight Variation
SAN: 1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. Nf3
UCI: e2e4 e7e5 b1c3 b8c6 f2f4 e5f4 g1f3
FEN: r1bqkbnr/pppp1ppp/2n5/8/4Pp2/2N2N2/PPPP2PP/R1BQKB1R b KQkq –

ECO: C25
Opening Name: Vienna Gambit, with Max Lange Defense: Pierce Gambit
SAN: 1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. Nf3 g5 5. d4
UCI: e2e4 e7e5 b1c3 b8c6 f2f4 e5f4 g1f3 g7g5 d2d4
FEN: r1bqkbnr/pppp1p1p/2n5/6p1/3PPp2/2N2N2/PPP3PP/R1BQKB1R b KQkq –

ECO: C25
Opening Name: Vienna Gambit, with Max Lange Defense: Quelle Gambit
SAN: 1. e4 e5 2. Nc3 Nc6 3. f4 Bc5 4. fxe5 d6
UCI: e2e4 e7e5 b1c3 b8c6 f2f4 f8c5 f4e5 d7d6
FEN: r1bqk1nr/ppp2ppp/2np4/2b1P3/4P3/2N5/PPPP2PP/R1BQKBNR w KQkq –

ECO: C25
Opening Name: Vienna Gambit, with Max Lange Defense: Steinitz Gambit
SAN: 1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. d4
UCI: e2e4 e7e5 b1c3 b8c6 f2f4 e5f4 d2d4
FEN: r1bqkbnr/pppp1ppp/2n5/8/3PPp2/2N5/PPP3PP/R1BQKBNR b KQkq –

ECO: C25
Opening Name: Vienna Gambit, with Max Lange Defense: Steinitz Gambit, Fraser-Minckwitz Defense
SAN: 1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. d4 Qh4+ 5. Ke2 b6
UCI: e2e4 e7e5 b1c3 b8c6 f2f4 e5f4 d2d4 d8h4 e1e2 b7b6
FEN: r1b1kbnr/p1pp1ppp/1pn5/8/3PPp1q/2N5/PPP1K1PP/R1BQ1BNR w kq –

ECO: C25
Opening Name: Vienna Gambit, with Max Lange Defense: Steinitz Gambit, Main Line
SAN: 1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. d4 Qh4+ 5. Ke2
UCI: e2e4 e7e5 b1c3 b8c6 f2f4 e5f4 d2d4 d8h4 e1e2
FEN: r1b1kbnr/pppp1ppp/2n5/8/3PPp1q/2N5/PPP1K1PP/R1BQ1BNR b kq –

ECO: C25
Opening Name: Vienna Gambit, with Max Lange Defense: Steinitz Gambit, Paulsen Defense
SAN: 1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. d4 Qh4+ 5. Ke2 d6
UCI: e2e4 e7e5 b1c3 b8c6 f2f4 e5f4 d2d4 d8h4 e1e2 d7d6
FEN: r1b1kbnr/ppp2ppp/2np4/8/3PPp1q/2N5/PPP1K1PP/R1BQ1BNR w kq –

ECO: C25
Opening Name: Vienna Gambit, with Max Lange Defense: Steinitz Gambit, Sörensen Defense
SAN: 1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. d4 Qh4+ 5. Ke2 g5
UCI: e2e4 e7e5 b1c3 b8c6 f2f4 e5f4 d2d4 d8h4 e1e2 g7g5
FEN: r1b1kbnr/pppp1p1p/2n5/6p1/3PPp1q/2N5/PPP1K1PP/R1BQ1BNR w kq –

ECO: C25
Opening Name: Vienna Gambit, with Max Lange Defense: Steinitz Gambit, Zukertort Defense
SAN: 1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. d4 Qh4+ 5. Ke2 d5
UCI: e2e4 e7e5 b1c3 b8c6 f2f4 e5f4 d2d4 d8h4 e1e2 d7d5
FEN: r1b1kbnr/ppp2ppp/2n5/3p4/3PPp1q/2N5/PPP1K1PP/R1BQ1BNR w kq –

ECO: C25
Opening Name: Vienna Game
SAN: 1. e4 e5 2. Nc3
UCI: e2e4 e7e5 b1c3
FEN: rnbqkbnr/pppp1ppp/8/4p3/4P3/2N5/PPPP1PPP/R1BQKBNR b KQkq –

ECO: C25
Opening Name: Vienna Game: Anderssen Defense
SAN: 1. e4 e5 2. Nc3 Bc5
UCI: e2e4 e7e5 b1c3 f8c5
FEN: rnbqk1nr/pppp1ppp/8/2b1p3/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq –

ECO: C25
Opening Name: Vienna Game: Fyfe Gambit
SAN: 1. e4 e5 2. Nc3 Nc6 3. d4
UCI: e2e4 e7e5 b1c3 b8c6 d2d4
FEN: r1bqkbnr/pppp1ppp/2n5/4p3/3PP3/2N5/PPP2PPP/R1BQKBNR b KQkq –

ECO: C25
Opening Name: Vienna Game: Giraffe Attack
SAN: 1. e4 e5 2. Nc3 Bc5 3. Qg4
UCI: e2e4 e7e5 b1c3 f8c5 d1g4
FEN: rnbqk1nr/pppp1ppp/8/2b1p3/4P1Q1/2N5/PPPP1PPP/R1B1KBNR b KQkq –

ECO: C25
Opening Name: Vienna Game: Hamppe-Meitner Variation
SAN: 1. e4 e5 2. Nc3 Bc5 3. Na4
UCI: e2e4 e7e5 b1c3 f8c5 c3a4
FEN: rnbqk1nr/pppp1ppp/8/2b1p3/N3P3/8/PPPP1PPP/R1BQKBNR b KQkq –

ECO: C25
Opening Name: Vienna Game: Hamppe-Muzio Gambit
SAN: 1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. Nf3 g5 5. Bc4 g4 6. O-O
UCI: e2e4 e7e5 b1c3 b8c6 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 e1g1
FEN: r1bqkbnr/pppp1p1p/2n5/8/2B1Ppp1/2N2N2/PPPP2PP/R1BQ1RK1 b kq –

ECO: C25
Opening Name: Vienna Game: Hamppe-Muzio, Dubois Variation
SAN: 1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. Nf3 g5 5. Bc4 g4 6. O-O gxf3 7. Qxf3 Ne5 8. Qxf4 Qf6
UCI: e2e4 e7e5 b1c3 b8c6 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 e1g1 g4f3 d1f3 c6e5 f3f4 d8f6
FEN: r1b1kbnr/pppp1p1p/5q2/4n3/2B1PQ2/2N5/PPPP2PP/R1B2RK1 w kq –

ECO: C25
Opening Name: Vienna Game: Max Lange Defense
SAN: 1. e4 e5 2. Nc3 Nc6
UCI: e2e4 e7e5 b1c3 b8c6
FEN: r1bqkbnr/pppp1ppp/2n5/4p3/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq –

ECO: C25
Opening Name: Vienna Game: Omaha Gambit
SAN: 1. e4 e5 2. Nc3 d6 3. f4
UCI: e2e4 e7e5 b1c3 d7d6 f2f4
FEN: rnbqkbnr/ppp2ppp/3p4/4p3/4PP2/2N5/PPPP2PP/R1BQKBNR b KQkq –

ECO: C25
Opening Name: Vienna Game: Paulsen Variation
SAN: 1. e4 e5 2. Nc3 Nc6 3. g3
UCI: e2e4 e7e5 b1c3 b8c6 g2g3
FEN: r1bqkbnr/pppp1ppp/2n5/4p3/4P3/2N3P1/PPPP1P1P/R1BQKBNR b KQkq –

ECO: C25
Opening Name: Vienna Game: Paulsen Variation
SAN: 1. e4 e5 2. Nc3 Nc6 3. g3 Nf6 4. Bg2 Bc5 5. Nge2 d5
UCI: e2e4 e7e5 b1c3 b8c6 g2g3 g8f6 f1g2 f8c5 g1e2 d7d5
FEN: r1bqk2r/ppp2ppp/2n2n2/2bpp3/4P3/2N3P1/PPPPNPBP/R1BQK2R w KQkq –

ECO: C25
Opening Name: Vienna Game: Paulsen Variation, Mariotti Gambit
SAN: 1. e4 e5 2. Nc3 Nc6 3. g3 Bc5 4. Bg2 h5 5. Nf3 h4
UCI: e2e4 e7e5 b1c3 b8c6 g2g3 f8c5 f1g2 h7h5 g1f3 h5h4
FEN: r1bqk1nr/pppp1pp1/2n5/2b1p3/4P2p/2N2NP1/PPPP1PBP/R1BQK2R w KQkq –

ECO: C25
Opening Name: Vienna Game: Philidor Countergambit
SAN: 1. e4 e5 2. Nc3 Nc6 3. d4 f5
UCI: e2e4 e7e5 b1c3 b8c6 d2d4 f7f5
FEN: r1bqkbnr/pppp2pp/2n5/4pp2/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq –

ECO: C25
Opening Name: Vienna Game: Pierce Gambit, Rushmere Attack
SAN: 1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. Nf3 g5 5. d4 g4 6. Bc4 gxf3 7. O-O d5 8. exd5 Bg4 9. dxc6
UCI: e2e4 e7e5 b1c3 b8c6 f2f4 e5f4 g1f3 g7g5 d2d4 g5g4 f1c4 g4f3 e1g1 d7d5 e4d5 c8g4 d5c6
FEN: r2qkbnr/ppp2p1p/2P5/8/2BP1pb1/2N2p2/PPP3PP/R1BQ1RK1 b kq –

ECO: C25
Opening Name: Vienna Game: Stanley Variation, Meitner-Mieses Gambit
SAN: 1. e4 e5 2. Nc3 Nc6 3. Bc4 Bc5 4. Qg4 Qf6 5. Nd5
UCI: e2e4 e7e5 b1c3 b8c6 f1c4 f8c5 d1g4 d8f6 c3d5
FEN: r1b1k1nr/pppp1ppp/2n2q2/2bNp3/2B1P1Q1/8/PPPP1PPP/R1B1K1NR b KQkq –

ECO: C25
Opening Name: Vienna Game: Zhuravlev Countergambit
SAN: 1. e4 e5 2. Nc3 Bb4 3. Qg4 Nf6
UCI: e2e4 e7e5 b1c3 f8b4 d1g4 g8f6
FEN: rnbqk2r/pppp1ppp/5n2/4p3/1b2P1Q1/2N5/PPPP1PPP/R1B1KBNR w KQkq –

ECO: C26
Opening Name: Bishop’s Opening: Horwitz Gambit
SAN: 1. e4 e5 2. Bc4 Nf6 3. Nc3 b5
UCI: e2e4 e7e5 f1c4 g8f6 b1c3 b7b5
FEN: rnbqkb1r/p1pp1ppp/5n2/1p2p3/2B1P3/2N5/PPPP1PPP/R1BQK1NR w KQkq –

ECO: C26
Opening Name: Bishop’s Opening: Vienna Hybrid, Spielmann Attack
SAN: 1. e4 e5 2. Nc3 Nf6 3. Bc4 Bc5 4. d3
UCI: e2e4 e7e5 b1c3 g8f6 f1c4 f8c5 d2d3
FEN: rnbqk2r/pppp1ppp/5n2/2b1p3/2B1P3/2NP4/PPP2PPP/R1BQK1NR b KQkq –

ECO: C26
Opening Name: Vienna Game: Falkbeer Variation
SAN: 1. e4 e5 2. Nc3 Nf6
UCI: e2e4 e7e5 b1c3 g8f6
FEN: rnbqkb1r/pppp1ppp/5n2/4p3/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq –

ECO: C26
Opening Name: Vienna Game: Mengarini Variation
SAN: 1. e4 e5 2. Nc3 Nf6 3. a3
UCI: e2e4 e7e5 b1c3 g8f6 a2a3
FEN: rnbqkb1r/pppp1ppp/5n2/4p3/4P3/P1N5/1PPP1PPP/R1BQKBNR b KQkq –

ECO: C26
Opening Name: Vienna Game: Mieses Variation
SAN: 1. e4 e5 2. Nc3 Nf6 3. g3
UCI: e2e4 e7e5 b1c3 g8f6 g2g3
FEN: rnbqkb1r/pppp1ppp/5n2/4p3/4P3/2N3P1/PPPP1P1P/R1BQKBNR b KQkq –

ECO: C26
Opening Name: Vienna Game: Mieses Variation, Erben Gambit
SAN: 1. e4 e5 2. Nc3 Nf6 3. g3 d5 4. exd5 c6
UCI: e2e4 e7e5 b1c3 g8f6 g2g3 d7d5 e4d5 c7c6
FEN: rnbqkb1r/pp3ppp/2p2n2/3Pp3/8/2N3P1/PPPP1P1P/R1BQKBNR w KQkq –

ECO: C26
Opening Name: Vienna Game: Paulsen Variation, Pollock Gambit
SAN: 1. e4 e5 2. Nc3 Nf6 3. g3 Bc5 4. Bg2 Nc6 5. Nge2 d5 6. exd5
UCI: e2e4 e7e5 b1c3 g8f6 g2g3 f8c5 f1g2 b8c6 g1e2 d7d5 e4d5
FEN: r1bqk2r/ppp2ppp/2n2n2/2bPp3/8/2N3P1/PPPPNPBP/R1BQK2R b KQkq –

ECO: C26
Opening Name: Vienna Game: Stanley Variation
SAN: 1. e4 e5 2. Nc3 Nf6 3. Bc4
UCI: e2e4 e7e5 b1c3 g8f6 f1c4
FEN: rnbqkb1r/pppp1ppp/5n2/4p3/2B1P3/2N5/PPPP1PPP/R1BQK1NR b KQkq –

ECO: C26
Opening Name: Vienna Game: Stanley Variation, Eifel Gambit
SAN: 1. e4 e5 2. Nc3 Nf6 3. Bc4 Bc5 4. Nge2 b5
UCI: e2e4 e7e5 b1c3 g8f6 f1c4 f8c5 g1e2 b7b5
FEN: rnbqk2r/p1pp1ppp/5n2/1pb1p3/2B1P3/2N5/PPPPNPPP/R1BQK2R w KQkq –

ECO: C26
Opening Name: Vienna Game: Stanley Variation, Reversed Spanish
SAN: 1. e4 e5 2. Nc3 Nf6 3. Bc4 Bb4
UCI: e2e4 e7e5 b1c3 g8f6 f1c4 f8b4
FEN: rnbqk2r/pppp1ppp/5n2/4p3/1bB1P3/2N5/PPPP1PPP/R1BQK1NR w KQkq –

ECO: C27
Opening Name: Bishop’s Opening: Boden-Kieseritzky Gambit
SAN: 1. e4 e5 2. Nf3 Nf6 3. Bc4 Nxe4 4. Nc3
UCI: e2e4 e7e5 g1f3 g8f6 f1c4 f6e4 b1c3
FEN: rnbqkb1r/pppp1ppp/8/4p3/2B1n3/2N2N2/PPPP1PPP/R1BQK2R b KQkq –

ECO: C27
Opening Name: Bishop’s Opening: Boden-Kieseritzky Gambit, Lichtenhein Defense
SAN: 1. e4 e5 2. Nf3 Nf6 3. Bc4 Nxe4 4. Nc3 d5
UCI: e2e4 e7e5 g1f3 g8f6 f1c4 f6e4 b1c3 d7d5
FEN: rnbqkb1r/ppp2ppp/8/3pp3/2B1n3/2N2N2/PPPP1PPP/R1BQK2R w KQkq –

ECO: C27
Opening Name: Vienna Game: Adams’ Gambit
SAN: 1. e4 e5 2. Nc3 Nf6 3. Bc4 Nxe4 4. Qh5 Nd6 5. Bb3 Nc6 6. d4
UCI: e2e4 e7e5 b1c3 g8f6 f1c4 f6e4 d1h5 e4d6 c4b3 b8c6 d2d4
FEN: r1bqkb1r/pppp1ppp/2nn4/4p2Q/3P4/1BN5/PPP2PPP/R1B1K1NR b KQkq –

ECO: C27
Opening Name: Vienna Game: Frankenstein-Dracula Variation
SAN: 1. e4 e5 2. Nc3 Nf6 3. Bc4 Nxe4
UCI: e2e4 e7e5 b1c3 g8f6 f1c4 f6e4
FEN: rnbqkb1r/pppp1ppp/8/4p3/2B1n3/2N5/PPPP1PPP/R1BQK1NR w KQkq –

ECO: C27
Opening Name: Vienna Game: Stanley Variation, Alekhine Variation
SAN: 1. e4 e5 2. Nc3 Nf6 3. Bc4 Nxe4 4. Qh5 Nd6 5. Bb3 Be7 6. Nf3 Nc6 7. Nxe5
UCI: e2e4 e7e5 b1c3 g8f6 f1c4 f6e4 d1h5 e4d6 c4b3 f8e7 g1f3 b8c6 f3e5
FEN: r1bqk2r/ppppbppp/2nn4/4N2Q/8/1BN5/PPPP1PPP/R1B1K2R b KQkq –

ECO: C27
Opening Name: Vienna Game: Stanley Variation, Frankenstein-Dracula Variation
SAN: 1. e4 e5 2. Nc3 Nf6 3. Bc4 Nxe4 4. Qh5 Nd6 5. Bb3 Nc6 6. Nb5 g6 7. Qf3 f5 8. Qd5 Qe7 9. Nxc7+ Kd8 10. Nxa8 b6
UCI: e2e4 e7e5 b1c3 g8f6 f1c4 f6e4 d1h5 e4d6 c4b3 b8c6 c3b5 g7g6 h5f3 f7f5 f3d5 d8e7 b5c7 e8d8 c7a8 b7b6
FEN: N1bk1b1r/p2pq2p/1pnn2p1/3Qpp2/8/1B6/PPPP1PPP/R1B1K1NR w KQ –

ECO: C27
Opening Name: Vienna Game: Stanley Variation, Monster Declined
SAN: 1. e4 e5 2. Nc3 Nf6 3. Bc4 Nxe4 4. Qh5 Nd6 5. Bb3 Be7
UCI: e2e4 e7e5 b1c3 g8f6 f1c4 f6e4 d1h5 e4d6 c4b3 f8e7
FEN: rnbqk2r/ppppbppp/3n4/4p2Q/8/1BN5/PPPP1PPP/R1B1K1NR w KQkq –

ECO: C28
Opening Name: Bishop’s Opening: Vienna Hybrid, Hromádka Variation
SAN: 1. e4 e5 2. Nc3 Nc6 3. Bc4 Nf6 4. d3 Bb4 5. Ne2
UCI: e2e4 e7e5 b1c3 b8c6 f1c4 g8f6 d2d3 f8b4 g1e2
FEN: r1bqk2r/pppp1ppp/2n2n2/4p3/1bB1P3/2NP4/PPP1NPPP/R1BQK2R b KQkq –

ECO: C28
Opening Name: Vienna Game: Stanley Variation, Bronstein Gambit
SAN: 1. e4 e5 2. Nc3 Nc6 3. Bc4 Nf6 4. f4 Nxe4 5. Nf3
UCI: e2e4 e7e5 b1c3 b8c6 f1c4 g8f6 f2f4 f6e4 g1f3
FEN: r1bqkb1r/pppp1ppp/2n5/4p3/2B1nP2/2N2N2/PPPP2PP/R1BQK2R b KQkq –

ECO: C28
Opening Name: Vienna Game: Stanley Variation, Three Knights Variation
SAN: 1. e4 e5 2. Nc3 Nc6 3. Bc4 Nf6
UCI: e2e4 e7e5 b1c3 b8c6 f1c4 g8f6
FEN: r1bqkb1r/pppp1ppp/2n2n2/4p3/2B1P3/2N5/PPPP1PPP/R1BQK1NR w KQkq –

ECO: C29
Opening Name: Vienna Game: Heyde Variation
SAN: 1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. fxe5 Nxe4 5. Qf3 f5 6. d4
UCI: e2e4 e7e5 b1c3 g8f6 f2f4 d7d5 f4e5 f6e4 d1f3 f7f5 d2d4
FEN: rnbqkb1r/ppp3pp/8/3pPp2/3Pn3/2N2Q2/PPP3PP/R1B1KBNR b KQkq –

ECO: C29
Opening Name: Vienna Game: Vienna Gambit
SAN: 1. e4 e5 2. Nc3 Nf6 3. f4
UCI: e2e4 e7e5 b1c3 g8f6 f2f4
FEN: rnbqkb1r/pppp1ppp/5n2/4p3/4PP2/2N5/PPPP2PP/R1BQKBNR b KQkq –

ECO: C29
Opening Name: Vienna Game: Vienna Gambit, Bardeleben Variation
SAN: 1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. fxe5 Nxe4 5. Qf3 f5
UCI: e2e4 e7e5 b1c3 g8f6 f2f4 d7d5 f4e5 f6e4 d1f3 f7f5
FEN: rnbqkb1r/ppp3pp/8/3pPp2/4n3/2N2Q2/PPPP2PP/R1B1KBNR w KQkq f6

ECO: C29
Opening Name: Vienna Game: Vienna Gambit, Breyer Variation
SAN: 1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. fxe5 Nxe4 5. Nf3 Be7
UCI: e2e4 e7e5 b1c3 g8f6 f2f4 d7d5 f4e5 f6e4 g1f3 f8e7
FEN: rnbqk2r/ppp1bppp/8/3pP3/4n3/2N2N2/PPPP2PP/R1BQKB1R w KQkq –

ECO: C29
Opening Name: Vienna Game: Vienna Gambit, Kaufmann Variation
SAN: 1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. fxe5 Nxe4 5. Nf3 Bg4 6. Qe2
UCI: e2e4 e7e5 b1c3 g8f6 f2f4 d7d5 f4e5 f6e4 g1f3 c8g4 d1e2
FEN: rn1qkb1r/ppp2ppp/8/3pP3/4n1b1/2N2N2/PPPPQ1PP/R1B1KB1R b KQkq –

ECO: C29
Opening Name: Vienna Game: Vienna Gambit, Main Line
SAN: 1. e4 e5 2. Nc3 Nf6 3. f4 d5
UCI: e2e4 e7e5 b1c3 g8f6 f2f4 d7d5
FEN: rnbqkb1r/ppp2ppp/5n2/3pp3/4PP2/2N5/PPPP2PP/R1BQKBNR w KQkq –

ECO: C29
Opening Name: Vienna Game: Vienna Gambit, Modern Variation
SAN: 1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. fxe5 Nxe4 5. d3
UCI: e2e4 e7e5 b1c3 g8f6 f2f4 d7d5 f4e5 f6e4 d2d3
FEN: rnbqkb1r/ppp2ppp/8/3pP3/4n3/2NP4/PPP3PP/R1BQKBNR b KQkq –

ECO: C29
Opening Name: Vienna Game: Vienna Gambit, Paulsen Attack
SAN: 1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. fxe5 Nxe4 5. Qf3
UCI: e2e4 e7e5 b1c3 g8f6 f2f4 d7d5 f4e5 f6e4 d1f3
FEN: rnbqkb1r/ppp2ppp/8/3pP3/4n3/2N2Q2/PPPP2PP/R1B1KBNR b KQkq –

ECO: C29
Opening Name: Vienna Game: Vienna Gambit, Steinitz Variation
SAN: 1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. d3
UCI: e2e4 e7e5 b1c3 g8f6 f2f4 d7d5 d2d3
FEN: rnbqkb1r/ppp2ppp/5n2/3pp3/4PP2/2NP4/PPP3PP/R1BQKBNR b KQkq –

ECO: C29
Opening Name: Vienna Game: Vienna Gambit, Wurzburger Trap
SAN: 1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. fxe5 Nxe4 5. d3 Qh4+ 6. g3 Nxg3 7. Nf3 Qh5 8. Nxd5
UCI: e2e4 e7e5 b1c3 g8f6 f2f4 d7d5 f4e5 f6e4 d2d3 d8h4 g2g3 e4g3 g1f3 h4h5 c3d5
FEN: rnb1kb1r/ppp2ppp/8/3NP2q/8/3P1Nn1/PPP4P/R1BQKB1R b KQkq –

ECO: C30
Opening Name: King’s Gambit
SAN: 1. e4 e5 2. f4
UCI: e2e4 e7e5 f2f4
FEN: rnbqkbnr/pppp1ppp/8/4p3/4PP2/8/PPPP2PP/RNBQKBNR b KQkq –

ECO: C30
Opening Name: King’s Gambit Declined: Classical Variation
SAN: 1. e4 e5 2. f4 Bc5
UCI: e2e4 e7e5 f2f4 f8c5
FEN: rnbqk1nr/pppp1ppp/8/2b1p3/4PP2/8/PPPP2PP/RNBQKBNR w KQkq –

ECO: C30
Opening Name: King’s Gambit Declined: Classical Variation
SAN: 1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. c3
UCI: e2e4 e7e5 f2f4 f8c5 g1f3 d7d6 c2c3
FEN: rnbqk1nr/ppp2ppp/3p4/2b1p3/4PP2/2P2N2/PP1P2PP/RNBQKB1R b KQkq –

ECO: C30
Opening Name: King’s Gambit Declined: Classical Variation, Euwe Attack
SAN: 1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. c3 Bg4 5. fxe5 dxe5 6. Qa4+
UCI: e2e4 e7e5 f2f4 f8c5 g1f3 d7d6 c2c3 c8g4 f4e5 d6e5 d1a4
FEN: rn1qk1nr/ppp2ppp/8/2b1p3/Q3P1b1/2P2N2/PP1P2PP/RNB1KB1R b KQkq –

ECO: C30
Opening Name: King’s Gambit Declined: Classical Variation, Rotlewi Countergambit
SAN: 1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. b4
UCI: e2e4 e7e5 f2f4 f8c5 g1f3 d7d6 b2b4
FEN: rnbqk1nr/ppp2ppp/3p4/2b1p3/1P2PP2/5N2/P1PP2PP/RNBQKB1R b KQkq –

ECO: C30
Opening Name: King’s Gambit Declined: Classical Variation, Rubinstein Countergambit
SAN: 1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. c3 f5
UCI: e2e4 e7e5 f2f4 f8c5 g1f3 d7d6 c2c3 f7f5
FEN: rnbqk1nr/ppp3pp/3p4/2b1pp2/4PP2/2P2N2/PP1P2PP/RNBQKB1R w KQkq –

ECO: C30
Opening Name: King’s Gambit Declined: Classical, Hanham Variation
SAN: 1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. Nc3 Nd7
UCI: e2e4 e7e5 f2f4 f8c5 g1f3 d7d6 b1c3 b8d7
FEN: r1bqk1nr/pppn1ppp/3p4/2b1p3/4PP2/2N2N2/PPPP2PP/R1BQKB1R w KQkq –

ECO: C30
Opening Name: King’s Gambit Declined: Classical, Réti Variation
SAN: 1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. c3 f5 5. fxe5 dxe5 6. d4 exd4 7. Bc4
UCI: e2e4 e7e5 f2f4 f8c5 g1f3 d7d6 c2c3 f7f5 f4e5 d6e5 d2d4 e5d4 f1c4
FEN: rnbqk1nr/ppp3pp/8/2b2p2/2BpP3/2P2N2/PP4PP/RNBQK2R b KQkq –

ECO: C30
Opening Name: King’s Gambit Declined: Classical, Soldatenkov Variation
SAN: 1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. fxe5
UCI: e2e4 e7e5 f2f4 f8c5 g1f3 d7d6 f4e5
FEN: rnbqk1nr/ppp2ppp/3p4/2b1P3/4P3/5N2/PPPP2PP/RNBQKB1R b KQkq –

ECO: C30
Opening Name: King’s Gambit Declined: Classical, Svenonius Variation
SAN: 1. e4 e5 2. Bc4 Nc6 3. Nc3 Nf6 4. d3 Bc5 5. f4 d6 6. Nf3 Bg4 7. h3 Bxf3 8. Qxf3 exf4
UCI: e2e4 e7e5 f1c4 b8c6 b1c3 g8f6 d2d3 f8c5 f2f4 d7d6 g1f3 c8g4 h2h3 g4f3 d1f3 e5f4
FEN: r2qk2r/ppp2ppp/2np1n2/2b5/2B1Pp2/2NP1Q1P/PPP3P1/R1B1K2R w KQkq –

ECO: C30
Opening Name: King’s Gambit Declined: Hobbs-Zilbermints Gambit
SAN: 1. e4 e5 2. f4 Nc6 3. Nf3 g5 4. fxg5 h6
UCI: e2e4 e7e5 f2f4 b8c6 g1f3 g7g5 f4g5 h7h6
FEN: r1bqkbnr/pppp1p2/2n4p/4p1P1/4P3/5N2/PPPP2PP/RNBQKB1R w KQkq –

ECO: C30
Opening Name: King’s Gambit Declined: Keene Defense
SAN: 1. e4 e5 2. f4 Qh4+ 3. g3 Qe7
UCI: e2e4 e7e5 f2f4 d8h4 g2g3 h4e7
FEN: rnb1kbnr/ppppqppp/8/4p3/4PP2/6P1/PPPP3P/RNBQKBNR w KQkq –

ECO: C30
Opening Name: King’s Gambit Declined: Keene’s Defense
SAN: 1. e4 e5 2. f4 Qh4+
UCI: e2e4 e7e5 f2f4 d8h4
FEN: rnb1kbnr/pppp1ppp/8/4p3/4PP1q/8/PPPP2PP/RNBQKBNR w KQkq –

ECO: C30
Opening Name: King’s Gambit Declined: Keene’s Defense
SAN: 1. e4 e5 2. f4 Qh4+ 3. g3
UCI: e2e4 e7e5 f2f4 d8h4 g2g3
FEN: rnb1kbnr/pppp1ppp/8/4p3/4PP1q/6P1/PPPP3P/RNBQKBNR b KQkq –

ECO: C30
Opening Name: King’s Gambit Declined: Mafia Defense
SAN: 1. e4 c5 2. f4 e5
UCI: e2e4 c7c5 f2f4 e7e5
FEN: rnbqkbnr/pp1p1ppp/8/2p1p3/4PP2/8/PPPP2PP/RNBQKBNR w KQkq –

ECO: C30
Opening Name: King’s Gambit Declined: Miles Defense
SAN: 1. e4 e5 2. f4 Nc6 3. Nf3 f5
UCI: e2e4 e7e5 f2f4 b8c6 g1f3 f7f5
FEN: r1bqkbnr/pppp2pp/2n5/4pp2/4PP2/5N2/PPPP2PP/RNBQKB1R w KQkq –

ECO: C30
Opening Name: King’s Gambit Declined: Norwalde Variation
SAN: 1. e4 e5 2. f4 Qf6
UCI: e2e4 e7e5 f2f4 d8f6
FEN: rnb1kbnr/pppp1ppp/5q2/4p3/4PP2/8/PPPP2PP/RNBQKBNR w KQkq –

ECO: C30
Opening Name: King’s Gambit Declined: Norwalde Variation, Bücker Gambit
SAN: 1. e4 e5 2. f4 Qf6 3. Nc3 Qxf4 4. Nf3 Bb4 5. Bc4
UCI: e2e4 e7e5 f2f4 d8f6 b1c3 f6f4 g1f3 f8b4 f1c4
FEN: rnb1k1nr/pppp1ppp/8/4p3/1bB1Pq2/2N2N2/PPPP2PP/R1BQK2R b KQkq –

ECO: C30
Opening Name: King’s Gambit Declined: Norwalde Variation, Schubert Variation
SAN: 1. e4 e5 2. f4 Qf6 3. Nc3 Qxf4 4. d4
UCI: e2e4 e7e5 f2f4 d8f6 b1c3 f6f4 d2d4
FEN: rnb1kbnr/pppp1ppp/8/4p3/3PPq2/2N5/PPP3PP/R1BQKBNR b KQkq –

ECO: C30
Opening Name: King’s Gambit Declined: Panteldakis Countergambit
SAN: 1. e4 e5 2. f4 f5
UCI: e2e4 e7e5 f2f4 f7f5
FEN: rnbqkbnr/pppp2pp/8/4pp2/4PP2/8/PPPP2PP/RNBQKBNR w KQkq –

ECO: C30
Opening Name: King’s Gambit Declined: Panteldakis Countergambit, Greco Variation
SAN: 1. e4 e5 2. f4 f5 3. exf5 Qh4+
UCI: e2e4 e7e5 f2f4 f7f5 e4f5 d8h4
FEN: rnb1kbnr/pppp2pp/8/4pP2/5P1q/8/PPPP2PP/RNBQKBNR w KQkq –

ECO: C30
Opening Name: King’s Gambit Declined: Panteldakis Countergambit, Pawn Sacrifice Line
SAN: 1. e4 e5 2. f4 f5 3. exf5 exf4 4. Qh5+ g6 5. fxg6 Qe7+ 6. Kd1
UCI: e2e4 e7e5 f2f4 f7f5 e4f5 e5f4 d1h5 g7g6 f5g6 d8e7 e1d1
FEN: rnb1kbnr/ppppq2p/6P1/7Q/5p2/8/PPPP2PP/RNBK1BNR b kq –

ECO: C30
Opening Name: King’s Gambit Declined: Panteldakis Countergambit, Schiller’s Defense
SAN: 1. e4 e5 2. f4 f5 3. exf5 Bc5
UCI: e2e4 e7e5 f2f4 f7f5 e4f5 f8c5
FEN: rnbqk1nr/pppp2pp/8/2b1pP2/5P2/8/PPPP2PP/RNBQKBNR w KQkq –

ECO: C30
Opening Name: King’s Gambit Declined: Panteldakis Countergambit, Shirazi Line
SAN: 1. e4 e5 2. f4 f5 3. exf5 exf4 4. Qh5+ Ke7
UCI: e2e4 e7e5 f2f4 f7f5 e4f5 e5f4 d1h5 e8e7
FEN: rnbq1bnr/ppppk1pp/8/5P1Q/5p2/8/PPPP2PP/RNB1KBNR w KQ –

ECO: C30
Opening Name: King’s Gambit Declined: Panteldakis Countergambit, Symmetrical Variation
SAN: 1. e4 e5 2. f4 f5 3. exf5 exf4 4. Nf3 d5 5. d4 Bd6 6. Bd3
UCI: e2e4 e7e5 f2f4 f7f5 e4f5 e5f4 g1f3 d7d5 d2d4 f8d6 f1d3
FEN: rnbqk1nr/ppp3pp/3b4/3p1P2/3P1p2/3B1N2/PPP3PP/RNBQK2R b KQkq –

ECO: C30
Opening Name: King’s Gambit Declined: Petrov’s Defense
SAN: 1. e4 e5 2. f4 Nf6
UCI: e2e4 e7e5 f2f4 g8f6
FEN: rnbqkb1r/pppp1ppp/5n2/4p3/4PP2/8/PPPP2PP/RNBQKBNR w KQkq –

ECO: C30
Opening Name: King’s Gambit Declined: Queen’s Knight Defense
SAN: 1. e4 e5 2. f4 Nc6
UCI: e2e4 e7e5 f2f4 b8c6
FEN: r1bqkbnr/pppp1ppp/2n5/4p3/4PP2/8/PPPP2PP/RNBQKBNR w KQkq –

ECO: C30
Opening Name: King’s Gambit Declined: Senechaud Countergambit
SAN: 1. e4 e5 2. f4 Bc5 3. Nf3 g5
UCI: e2e4 e7e5 f2f4 f8c5 g1f3 g7g5
FEN: rnbqk1nr/pppp1p1p/8/2b1p1p1/4PP2/5N2/PPPP2PP/RNBQKB1R w KQkq –

ECO: C30
Opening Name: King’s Gambit Declined: Soller-Zilbermints Gambit
SAN: 1. e4 e5 2. f4 f6 3. fxe5 Nc6
UCI: e2e4 e7e5 f2f4 f7f6 f4e5 b8c6
FEN: r1bqkbnr/pppp2pp/2n2p2/4P3/4P3/8/PPPP2PP/RNBQKBNR w KQkq –

ECO: C30
Opening Name: King’s Gambit Declined: Zilbermints Double Countergambit
SAN: 1. e4 e5 2. f4 g5
UCI: e2e4 e7e5 f2f4 g7g5
FEN: rnbqkbnr/pppp1p1p/8/4p1p1/4PP2/8/PPPP2PP/RNBQKBNR w KQkq –

ECO: C30
Opening Name: King’s Gambit Declined: Zilbermints Double Gambit
SAN: 1. e4 e5 2. f4 Nc6 3. Nf3 g5
UCI: e2e4 e7e5 f2f4 b8c6 g1f3 g7g5
FEN: r1bqkbnr/pppp1p1p/2n5/4p1p1/4PP2/5N2/PPPP2PP/RNBQKB1R w KQkq –

ECO: C31
Opening Name: King’s Gambit Declined: Falkbeer Countergambit
SAN: 1. e4 e5 2. f4 d5
UCI: e2e4 e7e5 f2f4 d7d5
FEN: rnbqkbnr/ppp2ppp/8/3pp3/4PP2/8/PPPP2PP/RNBQKBNR w KQkq –

ECO: C31
Opening Name: King’s Gambit Declined: Falkbeer Countergambit Accepted
SAN: 1. e4 e5 2. f4 d5 3. exd5
UCI: e2e4 e7e5 f2f4 d7d5 e4d5
FEN: rnbqkbnr/ppp2ppp/8/3Pp3/5P2/8/PPPP2PP/RNBQKBNR b KQkq –

ECO: C31
Opening Name: King’s Gambit Declined: Falkbeer Countergambit, Anderssen Attack
SAN: 1. e4 e5 2. f4 d5 3. exd5 e4 4. Bb5+
UCI: e2e4 e7e5 f2f4 d7d5 e4d5 e5e4 f1b5
FEN: rnbqkbnr/ppp2ppp/8/1B1P4/4pP2/8/PPPP2PP/RNBQK1NR b KQkq –

ECO: C31
Opening Name: King’s Gambit Declined: Falkbeer Countergambit, Blackburne Attack
SAN: 1. e4 e5 2. f4 d5 3. Nf3
UCI: e2e4 e7e5 f2f4 d7d5 g1f3
FEN: rnbqkbnr/ppp2ppp/8/3pp3/4PP2/5N2/PPPP2PP/RNBQKB1R b KQkq –

ECO: C31
Opening Name: King’s Gambit Declined: Falkbeer Countergambit, Charousek Gambit
SAN: 1. e4 e5 2. f4 d5 3. exd5 e4 4. d3
UCI: e2e4 e7e5 f2f4 d7d5 e4d5 e5e4 d2d3
FEN: rnbqkbnr/ppp2ppp/8/3P4/4pP2/3P4/PPP3PP/RNBQKBNR b KQkq –

ECO: C31
Opening Name: King’s Gambit Declined: Falkbeer Countergambit, Charousek Gambit, Morphy Defense
SAN: 1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. exd5 e4 5. d3 Bb4 6. Bd2 e3
UCI: e2e4 e7e5 b1c3 g8f6 f2f4 d7d5 e4d5 e5e4 d2d3 f8b4 c1d2 e4e3
FEN: rnbqk2r/ppp2ppp/5n2/3P4/1b3P2/2NPp3/PPPB2PP/R2QKBNR w KQkq –

ECO: C31
Opening Name: King’s Gambit Declined: Falkbeer Countergambit, Hinrichsen Gambit
SAN: 1. e4 e5 2. f4 d5 3. d4
UCI: e2e4 e7e5 f2f4 d7d5 d2d4
FEN: rnbqkbnr/ppp2ppp/8/3pp3/3PPP2/8/PPP3PP/RNBQKBNR b KQkq –

ECO: C31
Opening Name: King’s Gambit Declined: Falkbeer Countergambit, Miles Gambit
SAN: 1. e4 e5 2. f4 d5 3. exd5 Bc5
UCI: e2e4 e7e5 f2f4 d7d5 e4d5 f8c5
FEN: rnbqk1nr/ppp2ppp/8/2bPp3/5P2/8/PPPP2PP/RNBQKBNR w KQkq –

ECO: C31
Opening Name: King’s Gambit Declined: Falkbeer Countergambit, Milner-Barry Variation
SAN: 1. e4 e5 2. f4 d5 3. Nc3
UCI: e2e4 e7e5 f2f4 d7d5 b1c3
FEN: rnbqkbnr/ppp2ppp/8/3pp3/4PP2/2N5/PPPP2PP/R1BQKBNR b KQkq –

ECO: C31
Opening Name: King’s Gambit Declined: Falkbeer Countergambit, Modern Transfer
SAN: 1. e4 e5 2. f4 d5 3. exd5 exf4
UCI: e2e4 e7e5 f2f4 d7d5 e4d5 e5f4
FEN: rnbqkbnr/ppp2ppp/8/3P4/5p2/8/PPPP2PP/RNBQKBNR w KQkq –

ECO: C31
Opening Name: King’s Gambit Declined: Falkbeer Countergambit, Nimzowitsch-Marshall Countergambit
SAN: 1. e4 e5 2. f4 d5 3. exd5 c6
UCI: e2e4 e7e5 f2f4 d7d5 e4d5 c7c6
FEN: rnbqkbnr/pp3ppp/2p5/3Pp3/5P2/8/PPPP2PP/RNBQKBNR w KQkq –

ECO: C31
Opening Name: King’s Gambit Declined: Falkbeer Countergambit, Pickler Gambit
SAN: 1. e4 e5 2. f4 d5 3. exd5 c6 4. dxc6 Bc5
UCI: e2e4 e7e5 f2f4 d7d5 e4d5 c7c6 d5c6 f8c5
FEN: rnbqk1nr/pp3ppp/2P5/2b1p3/5P2/8/PPPP2PP/RNBQKBNR w KQkq –

ECO: C31
Opening Name: King’s Gambit Declined: Falkbeer Countergambit, Rubinstein Variation
SAN: 1. e4 e5 2. f4 d5 3. exd5 e4 4. Nc3 Nf6 5. Qe2
UCI: e2e4 e7e5 f2f4 d7d5 e4d5 e5e4 b1c3 g8f6 d1e2
FEN: rnbqkb1r/ppp2ppp/5n2/3P4/4pP2/2N5/PPPPQ1PP/R1B1KBNR b KQkq –

ECO: C31
Opening Name: King’s Gambit Declined: Falkbeer Countergambit, Staunton Line
SAN: 1. e4 e5 2. f4 d5 3. exd5 e4
UCI: e2e4 e7e5 f2f4 d7d5 e4d5 e5e4
FEN: rnbqkbnr/ppp2ppp/8/3P4/4pP2/8/PPPP2PP/RNBQKBNR w KQkq –

ECO: C31
Opening Name: Van Geet Opening: Grünfeld Defense, Steiner Gambit
SAN: 1. e4 e5 2. f4 d5 3. Nc3 dxe4 4. Nxe4
UCI: e2e4 e7e5 f2f4 d7d5 b1c3 d5e4 c3e4
FEN: rnbqkbnr/ppp2ppp/8/4p3/4NP2/8/PPPP2PP/R1BQKBNR b KQkq –

ECO: C32
Opening Name: King’s Gambit Declined: Falkbeer Countergambit, Alapin Variation
SAN: 1. e4 e5 2. f4 d5 3. exd5 e4 4. d3 Nf6 5. dxe4 Nxe4 6. Nf3 Bc5 7. Qe2 Bf2+ 8. Kd1 Qxd5+ 9. Nfd2
UCI: e2e4 e7e5 f2f4 d7d5 e4d5 e5e4 d2d3 g8f6 d3e4 f6e4 g1f3 f8c5 d1e2 c5f2 e1d1 d8d5 f3d2
FEN: rnb1k2r/ppp2ppp/8/3q4/4nP2/8/PPPNQbPP/RNBK1B1R b kq –

ECO: C32
Opening Name: King’s Gambit Declined: Falkbeer Countergambit, Charousek Gambit
SAN: 1. e4 e5 2. f4 d5 3. exd5 e4 4. d3 Nf6 5. dxe4 Nxe4 6. Qe2
UCI: e2e4 e7e5 f2f4 d7d5 e4d5 e5e4 d2d3 g8f6 d3e4 f6e4 d1e2
FEN: rnbqkb1r/ppp2ppp/8/3P4/4nP2/8/PPP1Q1PP/RNB1KBNR b KQkq –

ECO: C32
Opening Name: King’s Gambit Declined: Falkbeer Countergambit, Charousek Gambit Accepted
SAN: 1. e4 e5 2. f4 d5 3. exd5 e4 4. d3 Nf6 5. dxe4
UCI: e2e4 e7e5 f2f4 d7d5 e4d5 e5e4 d2d3 g8f6 d3e4
FEN: rnbqkb1r/ppp2ppp/5n2/3P4/4PP2/8/PPP3PP/RNBQKBNR b KQkq –

ECO: C32
Opening Name: King’s Gambit Declined: Falkbeer Countergambit, Charousek Gambit, Keres Variation
SAN: 1. e4 e5 2. f4 d5 3. exd5 e4 4. d3 Nf6 5. Nd2
UCI: e2e4 e7e5 f2f4 d7d5 e4d5 e5e4 d2d3 g8f6 b1d2
FEN: rnbqkb1r/ppp2ppp/5n2/3P4/4pP2/3P4/PPPN2PP/R1BQKBNR b KQkq –

ECO: C32
Opening Name: King’s Gambit Declined: Falkbeer Countergambit, Charousek Gambit, Main Line
SAN: 1. e4 e5 2. f4 d5 3. exd5 e4 4. d3 Nf6 5. dxe4 Nxe4 6. Nf3 Bc5 7. Qe2 Bf5
UCI: e2e4 e7e5 f2f4 d7d5 e4d5 e5e4 d2d3 g8f6 d3e4 f6e4 g1f3 f8c5 d1e2 c8f5
FEN: rn1qk2r/ppp2ppp/8/2bP1b2/4nP2/5N2/PPP1Q1PP/RNB1KB1R w KQkq –

ECO: C32
Opening Name: King’s Gambit Declined: Falkbeer Countergambit, Charousek Gambit, Old Line
SAN: 1. e4 e5 2. f4 d5 3. exd5 e4 4. d3 Nf6 5. Qe2
UCI: e2e4 e7e5 f2f4 d7d5 e4d5 e5e4 d2d3 g8f6 d1e2
FEN: rnbqkb1r/ppp2ppp/5n2/3P4/4pP2/3P4/PPP1Q1PP/RNB1KBNR b KQkq –

ECO: C32
Opening Name: King’s Gambit Declined: Falkbeer Countergambit, Charousek Variation
SAN: 1. e4 e5 2. f4 d5 3. exd5 e4 4. d3 Nf6 5. dxe4 Nxe4 6. Qe2 Qxd5 7. Nd2 f5 8. g4
UCI: e2e4 e7e5 f2f4 d7d5 e4d5 e5e4 d2d3 g8f6 d3e4 f6e4 d1e2 d8d5 b1d2 f7f5 g2g4
FEN: rnb1kb1r/ppp3pp/8/3q1p2/4nPP1/8/PPPNQ2P/R1B1KBNR b KQkq –

ECO: C32
Opening Name: King’s Gambit Declined: Falkbeer Countergambit, Tarrasch Variation
SAN: 1. e4 e5 2. f4 d5 3. exd5 e4 4. d3 Nf6 5. dxe4 Nxe4 6. Nf3 Bc5 7. Qe2 Bf5 8. g4 O-O
UCI: e2e4 e7e5 f2f4 d7d5 e4d5 e5e4 d2d3 g8f6 d3e4 f6e4 g1f3 f8c5 d1e2 c8f5 g2g4 e8g8
FEN: rn1q1rk1/ppp2ppp/8/2bP1b2/4nPP1/5N2/PPP1Q2P/RNB1KB1R w KQ –

ECO: C33
Opening Name: King’s Gambit Accepted
SAN: 1. e4 e5 2. f4 exf4
UCI: e2e4 e7e5 f2f4 e5f4
FEN: rnbqkbnr/pppp1ppp/8/8/4Pp2/8/PPPP2PP/RNBQKBNR w KQkq –

ECO: C33
Opening Name: King’s Gambit Accepted: Basman Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Qe2
UCI: e2e4 e7e5 f2f4 e5f4 d1e2
FEN: rnbqkbnr/pppp1ppp/8/8/4Pp2/8/PPPPQ1PP/RNB1KBNR b KQkq –

ECO: C33
Opening Name: King’s Gambit Accepted: Bishop’s Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Bc4
UCI: e2e4 e7e5 f2f4 e5f4 f1c4
FEN: rnbqkbnr/pppp1ppp/8/8/2B1Pp2/8/PPPP2PP/RNBQK1NR b KQkq –

ECO: C33
Opening Name: King’s Gambit Accepted: Bishop’s Gambit, Anderssen Defense
SAN: 1. e4 e5 2. f4 exf4 3. Bc4 g5
UCI: e2e4 e7e5 f2f4 e5f4 f1c4 g7g5
FEN: rnbqkbnr/pppp1p1p/8/6p1/2B1Pp2/8/PPPP2PP/RNBQK1NR w KQkq –

ECO: C33
Opening Name: King’s Gambit Accepted: Bishop’s Gambit, Anderssen Variation
SAN: 1. e4 e5 2. f4 exf4 3. Bc4 d5 4. Bxd5 c6
UCI: e2e4 e7e5 f2f4 e5f4 f1c4 d7d5 c4d5 c7c6
FEN: rnbqkbnr/pp3ppp/2p5/3B4/4Pp2/8/PPPP2PP/RNBQK1NR w KQkq –

ECO: C33
Opening Name: King’s Gambit Accepted: Bishop’s Gambit, Bledow Countergambit
SAN: 1. e4 e5 2. f4 exf4 3. Bc4 d5 4. Bxd5 Nf6
UCI: e2e4 e7e5 f2f4 e5f4 f1c4 d7d5 c4d5 g8f6
FEN: rnbqkb1r/ppp2ppp/5n2/3B4/4Pp2/8/PPPP2PP/RNBQK1NR w KQkq –

ECO: C33
Opening Name: King’s Gambit Accepted: Bishop’s Gambit, Bledow Variation
SAN: 1. e4 e5 2. f4 exf4 3. Bc4 d5
UCI: e2e4 e7e5 f2f4 e5f4 f1c4 d7d5
FEN: rnbqkbnr/ppp2ppp/8/3p4/2B1Pp2/8/PPPP2PP/RNBQK1NR w KQkq –

ECO: C33
Opening Name: King’s Gambit Accepted: Bishop’s Gambit, Boden Variation
SAN: 1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 Nc6
UCI: e2e4 e7e5 f2f4 e5f4 f1c4 d8h4 e1f1 b8c6
FEN: r1b1kbnr/pppp1ppp/2n5/8/2B1Pp1q/8/PPPP2PP/RNBQ1KNR w kq –

ECO: C33
Opening Name: King’s Gambit Accepted: Bishop’s Gambit, Bogoljubow Defense
SAN: 1. e4 e5 2. f4 exf4 3. Bc4 Nf6 4. Nc3 c6
UCI: e2e4 e7e5 f2f4 e5f4 f1c4 g8f6 b1c3 c7c6
FEN: rnbqkb1r/pp1p1ppp/2p2n2/8/2B1Pp2/2N5/PPPP2PP/R1BQK1NR w KQkq –

ECO: C33
Opening Name: King’s Gambit Accepted: Bishop’s Gambit, Bogoljubow Variation
SAN: 1. e4 e5 2. f4 exf4 3. Bc4 Nf6 4. Nc3
UCI: e2e4 e7e5 f2f4 e5f4 f1c4 g8f6 b1c3
FEN: rnbqkb1r/pppp1ppp/5n2/8/2B1Pp2/2N5/PPPP2PP/R1BQK1NR b KQkq –

ECO: C33
Opening Name: King’s Gambit Accepted: Bishop’s Gambit, Boren-Svenonius Variation
SAN: 1. e4 e5 2. f4 exf4 3. Bc4 d5 4. Bxd5 Qh4+ 5. Kf1 Bd6
UCI: e2e4 e7e5 f2f4 e5f4 f1c4 d7d5 c4d5 d8h4 e1f1 f8d6
FEN: rnb1k1nr/ppp2ppp/3b4/3B4/4Pp1q/8/PPPP2PP/RNBQ1KNR w kq –

ECO: C33
Opening Name: King’s Gambit Accepted: Bishop’s Gambit, Bryan Countergambit
SAN: 1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 b5
UCI: e2e4 e7e5 f2f4 e5f4 f1c4 d8h4 e1f1 b7b5
FEN: rnb1kbnr/p1pp1ppp/8/1p6/2B1Pp1q/8/PPPP2PP/RNBQ1KNR w kq –

ECO: C33
Opening Name: King’s Gambit Accepted: Bishop’s Gambit, Chigorin’s Attack
SAN: 1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 d5 5. Bxd5 g5 6. g3
UCI: e2e4 e7e5 f2f4 e5f4 f1c4 d8h4 e1f1 d7d5 c4d5 g7g5 g2g3
FEN: rnb1kbnr/ppp2p1p/8/3B2p1/4Pp1q/6P1/PPPP3P/RNBQ1KNR b kq –

ECO: C33
Opening Name: King’s Gambit Accepted: Bishop’s Gambit, Classical Defense
SAN: 1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 Ne7 5. Nc3 g5 6. d4 Bg7
UCI: e2e4 e7e5 f2f4 e5f4 f1c4 d8h4 e1f1 g8e7 b1c3 g7g5 d2d4 f8g7
FEN: rnb1k2r/ppppnpbp/8/6p1/2BPPp1q/2N5/PPP3PP/R1BQ1KNR w kq –

ECO: C33
Opening Name: King’s Gambit Accepted: Bishop’s Gambit, Classical Defense, Cozio Attack
SAN: 1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 g5 5. Qf3
UCI: e2e4 e7e5 f2f4 e5f4 f1c4 d8h4 e1f1 g7g5 d1f3
FEN: rnb1kbnr/pppp1p1p/8/6p1/2B1Pp1q/5Q2/PPPP2PP/RNB2KNR b kq –

ECO: C33
Opening Name: King’s Gambit Accepted: Bishop’s Gambit, Cozio Defense
SAN: 1. e4 e5 2. f4 exf4 3. Bc4 Nf6
UCI: e2e4 e7e5 f2f4 e5f4 f1c4 g8f6
FEN: rnbqkb1r/pppp1ppp/5n2/8/2B1Pp2/8/PPPP2PP/RNBQK1NR w KQkq –

ECO: C33
Opening Name: King’s Gambit Accepted: Bishop’s Gambit, Cozio Variation
SAN: 1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 d6
UCI: e2e4 e7e5 f2f4 e5f4 f1c4 d8h4 e1f1 d7d6
FEN: rnb1kbnr/ppp2ppp/3p4/8/2B1Pp1q/8/PPPP2PP/RNBQ1KNR w kq –

ECO: C33
Opening Name: King’s Gambit Accepted: Bishop’s Gambit, First Jaenisch Variation
SAN: 1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 Nf6
UCI: e2e4 e7e5 f2f4 e5f4 f1c4 d8h4 e1f1 g8f6
FEN: rnb1kb1r/pppp1ppp/5n2/8/2B1Pp1q/8/PPPP2PP/RNBQ1KNR w kq –

ECO: C33
Opening Name: King’s Gambit Accepted: Bishop’s Gambit, Fraser Variation
SAN: 1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 g5 5. Nc3 Bg7 6. g3 fxg3 7. Qf3
UCI: e2e4 e7e5 f2f4 e5f4 f1c4 d8h4 e1f1 g7g5 b1c3 f8g7 g2g3 f4g3 d1f3
FEN: rnb1k1nr/pppp1pbp/8/6p1/2B1P2q/2N2Qp1/PPPP3P/R1B2KNR b kq –

ECO: C33
Opening Name: King’s Gambit Accepted: Bishop’s Gambit, Gianutio Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Bc4 f5
UCI: e2e4 e7e5 f2f4 e5f4 f1c4 f7f5
FEN: rnbqkbnr/pppp2pp/8/5p2/2B1Pp2/8/PPPP2PP/RNBQK1NR w KQkq –

ECO: C33
Opening Name: King’s Gambit Accepted: Bishop’s Gambit, Greco Variation
SAN: 1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 Bc5
UCI: e2e4 e7e5 f2f4 e5f4 f1c4 d8h4 e1f1 f8c5
FEN: rnb1k1nr/pppp1ppp/8/2b5/2B1Pp1q/8/PPPP2PP/RNBQ1KNR w kq –

ECO: C33
Opening Name: King’s Gambit Accepted: Bishop’s Gambit, Grimm Attack
SAN: 1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 g5 5. Nc3 Bg7 6. d4 d6 7. e5
UCI: e2e4 e7e5 f2f4 e5f4 f1c4 d8h4 e1f1 g7g5 b1c3 f8g7 d2d4 d7d6 e4e5
FEN: rnb1k1nr/ppp2pbp/3p4/4P1p1/2BP1p1q/2N5/PPP3PP/R1BQ1KNR b kq –

ECO: C33
Opening Name: King’s Gambit Accepted: Bishop’s Gambit, Kieseritzky Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Bc4 b5
UCI: e2e4 e7e5 f2f4 e5f4 f1c4 b7b5
FEN: rnbqkbnr/p1pp1ppp/8/1p6/2B1Pp2/8/PPPP2PP/RNBQK1NR w KQkq –

ECO: C33
Opening Name: King’s Gambit Accepted: Bishop’s Gambit, Lopez Defense
SAN: 1. e4 e5 2. f4 exf4 3. Bc4 c6
UCI: e2e4 e7e5 f2f4 e5f4 f1c4 c7c6
FEN: rnbqkbnr/pp1p1ppp/2p5/8/2B1Pp2/8/PPPP2PP/RNBQK1NR w KQkq –

ECO: C33
Opening Name: King’s Gambit Accepted: Bishop’s Gambit, Lopez Variation
SAN: 1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 g5
UCI: e2e4 e7e5 f2f4 e5f4 f1c4 d8h4 e1f1 g7g5
FEN: rnb1kbnr/pppp1p1p/8/6p1/2B1Pp1q/8/PPPP2PP/RNBQ1KNR w kq –

ECO: C33
Opening Name: King’s Gambit Accepted: Bishop’s Gambit, Maurian Defense
SAN: 1. e4 e5 2. f4 exf4 3. Bc4 Nc6
UCI: e2e4 e7e5 f2f4 e5f4 f1c4 b8c6
FEN: r1bqkbnr/pppp1ppp/2n5/8/2B1Pp2/8/PPPP2PP/RNBQK1NR w KQkq –

ECO: C33
Opening Name: King’s Gambit Accepted: Bishop’s Gambit, McDonnell Attack
SAN: 1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 g5 5. Nc3 Bg7 6. d4 Ne7 7. g3
UCI: e2e4 e7e5 f2f4 e5f4 f1c4 d8h4 e1f1 g7g5 b1c3 f8g7 d2d4 g8e7 g2g3
FEN: rnb1k2r/ppppnpbp/8/6p1/2BPPp1q/2N3P1/PPP4P/R1BQ1KNR b kq –

ECO: C33
Opening Name: King’s Gambit Accepted: Bishop’s Gambit, McDonnell Attack
SAN: 1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 g5 5. Nc3 Bg7 6. g3
UCI: e2e4 e7e5 f2f4 e5f4 f1c4 d8h4 e1f1 g7g5 b1c3 f8g7 g2g3
FEN: rnb1k1nr/pppp1pbp/8/6p1/2B1Pp1q/2N3P1/PPPP3P/R1BQ1KNR b kq –

ECO: C33
Opening Name: King’s Gambit Accepted: Bishop’s Gambit, Paulsen Attack
SAN: 1. e4 e5 2. f4 exf4 3. Bc4 Nf6 4. Nc3 Bb4 5. e5
UCI: e2e4 e7e5 f2f4 e5f4 f1c4 g8f6 b1c3 f8b4 e4e5
FEN: rnbqk2r/pppp1ppp/5n2/4P3/1bB2p2/2N5/PPPP2PP/R1BQK1NR b KQkq –

ECO: C33
Opening Name: King’s Gambit Accepted: Bishop’s Gambit, Steinitz Defense
SAN: 1. e4 e5 2. f4 exf4 3. Bc4 Ne7
UCI: e2e4 e7e5 f2f4 e5f4 f1c4 g8e7
FEN: rnbqkb1r/ppppnppp/8/8/2B1Pp2/8/PPPP2PP/RNBQK1NR w KQkq –

ECO: C33
Opening Name: King’s Gambit Accepted: Breyer Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Qf3
UCI: e2e4 e7e5 f2f4 e5f4 d1f3
FEN: rnbqkbnr/pppp1ppp/8/8/4Pp2/5Q2/PPPP2PP/RNB1KBNR b KQkq –

ECO: C33
Opening Name: King’s Gambit Accepted: Carrera Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Qh5
UCI: e2e4 e7e5 f2f4 e5f4 d1h5
FEN: rnbqkbnr/pppp1ppp/8/7Q/4Pp2/8/PPPP2PP/RNB1KBNR b KQkq –

ECO: C33
Opening Name: King’s Gambit Accepted: Dodo Variation
SAN: 1. e4 e5 2. f4 exf4 3. Qg4
UCI: e2e4 e7e5 f2f4 e5f4 d1g4
FEN: rnbqkbnr/pppp1ppp/8/8/4PpQ1/8/PPPP2PP/RNB1KBNR b KQkq –

ECO: C33
Opening Name: King’s Gambit Accepted: Eisenberg Variation
SAN: 1. e4 e5 2. f4 exf4 3. Nh3
UCI: e2e4 e7e5 f2f4 e5f4 g1h3
FEN: rnbqkbnr/pppp1ppp/8/8/4Pp2/7N/PPPP2PP/RNBQKB1R b KQkq –

ECO: C33
Opening Name: King’s Gambit Accepted: Gaga Gambit
SAN: 1. e4 e5 2. f4 exf4 3. g3
UCI: e2e4 e7e5 f2f4 e5f4 g2g3
FEN: rnbqkbnr/pppp1ppp/8/8/4Pp2/6P1/PPPP3P/RNBQKBNR b KQkq –

ECO: C33
Opening Name: King’s Gambit Accepted: Lopez-Gianutio Countergambit, Hein Variation
SAN: 1. e4 e5 2. f4 exf4 3. Bc4 f5 4. Qe2 Qh4+ 5. Kd1 fxe4 6. Nc3 Kd8
UCI: e2e4 e7e5 f2f4 e5f4 f1c4 f7f5 d1e2 d8h4 e1d1 f5e4 b1c3 e8d8
FEN: rnbk1bnr/pppp2pp/8/8/2B1pp1q/2N5/PPPPQ1PP/R1BK2NR w – –

ECO: C33
Opening Name: King’s Gambit Accepted: Mason-Keres Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Nc3
UCI: e2e4 e7e5 f2f4 e5f4 b1c3
FEN: rnbqkbnr/pppp1ppp/8/8/4Pp2/2N5/PPPP2PP/R1BQKBNR b KQkq –

ECO: C33
Opening Name: King’s Gambit Accepted: Orsini Gambit
SAN: 1. e4 e5 2. f4 exf4 3. b3
UCI: e2e4 e7e5 f2f4 e5f4 b2b3
FEN: rnbqkbnr/pppp1ppp/8/8/4Pp2/1P6/P1PP2PP/RNBQKBNR b KQkq –

ECO: C33
Opening Name: King’s Gambit Accepted: Paris Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Ne2
UCI: e2e4 e7e5 f2f4 e5f4 g1e2
FEN: rnbqkbnr/pppp1ppp/8/8/4Pp2/8/PPPPN1PP/RNBQKB1R b KQkq –

ECO: C33
Opening Name: King’s Gambit Accepted: Polerio Gambit
SAN: 1. e4 e5 2. f4 exf4 3. d4
UCI: e2e4 e7e5 f2f4 e5f4 d2d4
FEN: rnbqkbnr/pppp1ppp/8/8/3PPp2/8/PPP3PP/RNBQKBNR b KQkq –

ECO: C33
Opening Name: King’s Gambit Accepted: Schurig Gambit, with Bb5
SAN: 1. e4 e5 2. f4 exf4 3. Bb5
UCI: e2e4 e7e5 f2f4 e5f4 f1b5
FEN: rnbqkbnr/pppp1ppp/8/1B6/4Pp2/8/PPPP2PP/RNBQK1NR b KQkq –

ECO: C33
Opening Name: King’s Gambit Accepted: Schurig Gambit, with Bd3
SAN: 1. e4 e5 2. f4 exf4 3. Bd3
UCI: e2e4 e7e5 f2f4 e5f4 f1d3
FEN: rnbqkbnr/pppp1ppp/8/8/4Pp2/3B4/PPPP2PP/RNBQK1NR b KQkq –

ECO: C33
Opening Name: King’s Gambit Accepted: Stamma Gambit
SAN: 1. e4 e5 2. f4 exf4 3. h4
UCI: e2e4 e7e5 f2f4 e5f4 h2h4
FEN: rnbqkbnr/pppp1ppp/8/8/4Pp1P/8/PPPP2P1/RNBQKBNR b KQkq –

ECO: C33
Opening Name: King’s Gambit Accepted: Tartakower Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Be2
UCI: e2e4 e7e5 f2f4 e5f4 f1e2
FEN: rnbqkbnr/pppp1ppp/8/8/4Pp2/8/PPPPB1PP/RNBQK1NR b KQkq –

ECO: C33
Opening Name: King’s Gambit Accepted: Tartakower Gambit, Weiss Defense
SAN: 1. e4 e5 2. f4 exf4 3. Be2 f5 4. exf5 d6
UCI: e2e4 e7e5 f2f4 e5f4 f1e2 f7f5 e4f5 d7d6
FEN: rnbqkbnr/ppp3pp/3p4/5P2/5p2/8/PPPPB1PP/RNBQK1NR w KQkq –

ECO: C33
Opening Name: King’s Gambit Accepted: Tumbleweed
SAN: 1. e4 e5 2. f4 exf4 3. Kf2
UCI: e2e4 e7e5 f2f4 e5f4 e1f2
FEN: rnbqkbnr/pppp1ppp/8/8/4Pp2/8/PPPP1KPP/RNBQ1BNR b kq –

ECO: C34
Opening Name: King’s Gambit Accepted: Becker Defense
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 h6
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 h7h6
FEN: rnbqkbnr/pppp1pp1/7p/8/4Pp2/5N2/PPPP2PP/RNBQKB1R w KQkq –

ECO: C34
Opening Name: King’s Gambit Accepted: Bonsch-Osmolovsky Variation
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 Ne7
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g8e7
FEN: rnbqkb1r/ppppnppp/8/8/4Pp2/5N2/PPPP2PP/RNBQKB1R w KQkq –

ECO: C34
Opening Name: King’s Gambit Accepted: Fischer Defense
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 d6
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 d7d6
FEN: rnbqkbnr/ppp2ppp/3p4/8/4Pp2/5N2/PPPP2PP/RNBQKB1R w KQkq –

ECO: C34
Opening Name: King’s Gambit Accepted: Fischer Defense, Schulder Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 d6 4. b4
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 d7d6 b2b4
FEN: rnbqkbnr/ppp2ppp/3p4/8/1P2Pp2/5N2/P1PP2PP/RNBQKB1R b KQkq –

ECO: C34
Opening Name: King’s Gambit Accepted: Fischer Defense, Spanish Variation
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 d6 4. d4 Nf6 5. Bd3
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 d7d6 d2d4 g8f6 f1d3
FEN: rnbqkb1r/ppp2ppp/3p1n2/8/3PPp2/3B1N2/PPP3PP/RNBQK2R b KQkq –

ECO: C34
Opening Name: King’s Gambit Accepted: Gianutio Countergambit
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 f5
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 f7f5
FEN: rnbqkbnr/pppp2pp/8/5p2/4Pp2/5N2/PPPP2PP/RNBQKB1R w KQkq –

ECO: C34
Opening Name: King’s Gambit Accepted: Greco Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 d6 4. Bc4 h6 5. d4 g5 6. h4 Bg7
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 d7d6 f1c4 h7h6 d2d4 g7g5 h2h4 f8g7
FEN: rnbqk1nr/ppp2pb1/3p3p/6p1/2BPPp1P/5N2/PPP3P1/RNBQK2R w KQkq –

ECO: C34
Opening Name: King’s Gambit Accepted: King’s Knight’s Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5
FEN: rnbqkbnr/pppp1p1p/8/6p1/4Pp2/5N2/PPPP2PP/RNBQKB1R w KQkq –

ECO: C34
Opening Name: King’s Gambit Accepted: King’s Knight’s Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Nf3
UCI: e2e4 e7e5 f2f4 e5f4 g1f3
FEN: rnbqkbnr/pppp1ppp/8/8/4Pp2/5N2/PPPP2PP/RNBQKB1R b KQkq –

ECO: C34
Opening Name: King’s Gambit Accepted: MacLeod Defense
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 Nc6
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 b8c6
FEN: r1bqkbnr/pppp1ppp/2n5/8/4Pp2/5N2/PPPP2PP/RNBQKB1R w KQkq –

ECO: C34
Opening Name: King’s Gambit Accepted: Schallopp Defense
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 Nf6
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g8f6
FEN: rnbqkb1r/pppp1ppp/5n2/8/4Pp2/5N2/PPPP2PP/RNBQKB1R w KQkq –

ECO: C34
Opening Name: King’s Gambit Accepted: Schallopp Defense, Tashkent Attack
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 Nf6 4. e5 Nh5 5. g4
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g8f6 e4e5 f6h5 g2g4
FEN: rnbqkb1r/pppp1ppp/8/4P2n/5pP1/5N2/PPPP3P/RNBQKB1R b KQkq g3

ECO: C34
Opening Name: King’s Gambit Accepted: Wagenbach Defense
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 h5
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 h7h5
FEN: rnbqkbnr/pppp1pp1/8/7p/4Pp2/5N2/PPPP2PP/RNBQKB1R w KQkq –

ECO: C35
Opening Name: King’s Gambit Accepted: Cunningham Defense
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 Be7
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 f8e7
FEN: rnbqk1nr/ppppbppp/8/8/4Pp2/5N2/PPPP2PP/RNBQKB1R w KQkq –

ECO: C35
Opening Name: King’s Gambit Accepted: Cunningham Defense, Bertin Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 Be7 4. Bc4 Bh4+ 5. g3
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 f8e7 f1c4 e7h4 g2g3
FEN: rnbqk1nr/pppp1ppp/8/8/2B1Pp1b/5NP1/PPPP3P/RNBQK2R b KQkq –

ECO: C35
Opening Name: King’s Gambit Accepted: Cunningham Defense, Bertin Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 Be7 4. Bc4 Bh4+ 5. g3 fxg3 6. O-O gxh2+ 7. Kh1
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 f8e7 f1c4 e7h4 g2g3 f4g3 e1g1 g3h2 g1h1
FEN: rnbqk1nr/pppp1ppp/8/8/2B1P2b/5N2/PPPP3p/RNBQ1R1K b kq –

ECO: C35
Opening Name: King’s Gambit Accepted: Cunningham Defense, McCormick Defense
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 Be7 4. Bc4 Nf6
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 f8e7 f1c4 g8f6
FEN: rnbqk2r/ppppbppp/5n2/8/2B1Pp2/5N2/PPPP2PP/RNBQK2R w KQkq –

ECO: C36
Opening Name: King’s Gambit Accepted: Abbazia Defense
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 d5 4. exd5 Nf6
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 d7d5 e4d5 g8f6
FEN: rnbqkb1r/ppp2ppp/5n2/3P4/5p2/5N2/PPPP2PP/RNBQKB1R w KQkq –

ECO: C36
Opening Name: King’s Gambit Accepted: Abbazia Defense, Main Line
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 d5 4. exd5 Nf6 5. Bb5+ c6 6. dxc6 bxc6 7. Bc4 Nd5
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 d7d5 e4d5 g8f6 f1b5 c7c6 d5c6 b7c6 b5c4 f6d5
FEN: rnbqkb1r/p4ppp/2p5/3n4/2B2p2/5N2/PPPP2PP/RNBQK2R w KQkq –

ECO: C36
Opening Name: King’s Gambit Accepted: Modern Defense
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 d5
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 d7d5
FEN: rnbqkbnr/ppp2ppp/8/3p4/4Pp2/5N2/PPPP2PP/RNBQKB1R w KQkq –

ECO: C36
Opening Name: King’s Gambit Accepted: Modern Defense
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 d5 4. exd5
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 d7d5 e4d5
FEN: rnbqkbnr/ppp2ppp/8/3P4/5p2/5N2/PPPP2PP/RNBQKB1R b KQkq –

ECO: C37
Opening Name: King’s Gambit Accepted: Australian Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. h4
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 h2h4
FEN: rnbqkbnr/pppp1p1p/8/8/2B1PppP/5N2/PPPP2P1/RNBQK2R b KQkq h3

ECO: C37
Opening Name: King’s Gambit Accepted: Blachly Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 Nc6 4. Bc4 g5
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 b8c6 f1c4 g7g5
FEN: r1bqkbnr/pppp1p1p/2n5/6p1/2B1Pp2/5N2/PPPP2PP/RNBQK2R w KQkq –

ECO: C37
Opening Name: King’s Gambit Accepted: Double Muzio Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. O-O gxf3 6. Qxf3 Qf6 7. e5 Qxe5 8. Bxf7+
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 e1g1 g4f3 d1f3 d8f6 e4e5 f6e5 c4f7
FEN: rnb1kbnr/pppp1B1p/8/4q3/5p2/5Q2/PPPP2PP/RNB2RK1 b kq –

ECO: C37
Opening Name: King’s Gambit Accepted: Double Muzio Gambit, Baldwin Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. O-O gxf3 6. Qxf3 Qf6 7. Nc3 Qd4+ 8. Kh1 Qxc4 9. Nd5
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 e1g1 g4f3 d1f3 d8f6 b1c3 f6d4 g1h1 d4c4 c3d5
FEN: rnb1kbnr/pppp1p1p/8/3N4/2q1Pp2/5Q2/PPPP2PP/R1B2R1K b kq –

ECO: C37
Opening Name: King’s Gambit Accepted: Double Muzio Gambit, Bello Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. O-O gxf3 6. Qxf3 Qf6 7. Nc3
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 e1g1 g4f3 d1f3 d8f6 b1c3
FEN: rnb1kbnr/pppp1p1p/5q2/8/2B1Pp2/2N2Q2/PPPP2PP/R1B2RK1 b kq –

ECO: C37
Opening Name: King’s Gambit Accepted: Double Muzio Gambit, Paulsen Defense
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. O-O gxf3 6. Qxf3 Qf6 7. e5 Qxe5 8. d3 Bh6 9. Nc3 Ne7 10. Bd2 Nbc6 11. Rae1
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 e1g1 g4f3 d1f3 d8f6 e4e5 f6e5 d2d3 f8h6 b1c3 g8e7 c1d2 b8c6 a1e1
FEN: r1b1k2r/ppppnp1p/2n4b/4q3/2B2p2/2NP1Q2/PPPB2PP/4RRK1 b kq –

ECO: C37
Opening Name: King’s Gambit Accepted: Double Muzio Gambit, Young Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. O-O gxf3 6. Qxf3 Qf6 7. Bxf7+ Kxf7 8. d4 Qxd4+ 9. Be3 Qf6 10. Nc3 fxe3
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 e1g1 g4f3 d1f3 d8f6 c4f7 e8f7 d2d4 f6d4 c1e3 d4f6 b1c3 f4e3
FEN: rnb2bnr/pppp1k1p/5q2/8/4P3/2N1pQ2/PPP3PP/R4RK1 w – –

ECO: C37
Opening Name: King’s Gambit Accepted: Ghulam-Kassim Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. d4
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 d2d4
FEN: rnbqkbnr/pppp1p1p/8/8/2BPPpp1/5N2/PPP3PP/RNBQK2R b KQkq –

ECO: C37
Opening Name: King’s Gambit Accepted: Ghulam-Kassim Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. d4 gxf3 6. Qxf3
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 d2d4 g4f3 d1f3
FEN: rnbqkbnr/pppp1p1p/8/8/2BPPp2/5Q2/PPP3PP/RNB1K2R b KQkq –

ECO: C37
Opening Name: King’s Gambit Accepted: King’s Knight’s Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4
FEN: rnbqkbnr/pppp1p1p/8/6p1/2B1Pp2/5N2/PPPP2PP/RNBQK2R b KQkq –

ECO: C37
Opening Name: King’s Gambit Accepted: Kotov Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. d4 gxf3 6. Bxf4
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 d2d4 g4f3 c1f4
FEN: rnbqkbnr/pppp1p1p/8/8/2BPPB2/5p2/PPP3PP/RN1QK2R b KQkq –

ECO: C37
Opening Name: King’s Gambit Accepted: Lolli Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. Bxf7+
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 c4f7
FEN: rnbqkbnr/pppp1B1p/8/8/4Ppp1/5N2/PPPP2PP/RNBQK2R b KQkq –

ECO: C37
Opening Name: King’s Gambit Accepted: Lolli Gambit, Young Variation
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. Bxf7+ Kxf7 6. O-O gxf3 7. Qxf3 Qf6 8. d4 Qxd4+ 9. Be3 Qf6 10. Nc3
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 c4f7 e8f7 e1g1 g4f3 d1f3 d8f6 d2d4 f6d4 c1e3 d4f6 b1c3
FEN: rnb2bnr/pppp1k1p/5q2/8/4Pp2/2N1BQ2/PPP3PP/R4RK1 b – –

ECO: C37
Opening Name: King’s Gambit Accepted: McDonnell Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. Nc3
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 b1c3
FEN: rnbqkbnr/pppp1p1p/8/8/2B1Ppp1/2N2N2/PPPP2PP/R1BQK2R b KQkq –

ECO: C37
Opening Name: King’s Gambit Accepted: Middleton Countergambit
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 d6 5. O-O Bg4 6. h3 h5 7. hxg4 hxg4
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 d7d6 e1g1 c8g4 h2h3 h7h5 h3g4 h5g4
FEN: rn1qkbnr/ppp2p2/3p4/6p1/2B1Ppp1/5N2/PPPP2P1/RNBQ1RK1 w kq –

ECO: C37
Opening Name: King’s Gambit Accepted: Muzio Gambit Accepted, From’s Defense
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. O-O gxf3 6. Qxf3 Qe7
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 e1g1 g4f3 d1f3 d8e7
FEN: rnb1kbnr/ppppqp1p/8/8/2B1Pp2/5Q2/PPPP2PP/RNB2RK1 w kq –

ECO: C37
Opening Name: King’s Gambit Accepted: Muzio Gambit, Brentano Defense
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. O-O d5
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 e1g1 d7d5
FEN: rnbqkbnr/ppp2p1p/8/3p4/2B1Ppp1/5N2/PPPP2PP/RNBQ1RK1 w kq –

ECO: C37
Opening Name: King’s Gambit Accepted: Muzio Gambit, Holloway Defense
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. O-O gxf3 6. Qxf3 Nc6
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 e1g1 g4f3 d1f3 b8c6
FEN: r1bqkbnr/pppp1p1p/2n5/8/2B1Pp2/5Q2/PPPP2PP/RNB2RK1 w kq –

ECO: C37
Opening Name: King’s Gambit Accepted: Muzio Gambit, Kling and Horwitz Counterattack
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. O-O Qe7
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 e1g1 d8e7
FEN: rnb1kbnr/ppppqp1p/8/8/2B1Ppp1/5N2/PPPP2PP/RNBQ1RK1 w kq –

ECO: C37
Opening Name: King’s Gambit Accepted: Muzio Gambit, Sarratt Defense
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. O-O gxf3 6. Qxf3 Qf6
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 e1g1 g4f3 d1f3 d8f6
FEN: rnb1kbnr/pppp1p1p/5q2/8/2B1Pp2/5Q2/PPPP2PP/RNB2RK1 w kq –

ECO: C37
Opening Name: King’s Gambit Accepted: Muzio Gambit, Wild Muzio Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. O-O
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 e1g1
FEN: rnbqkbnr/pppp1p1p/8/8/2B1Ppp1/5N2/PPPP2PP/RNBQ1RK1 b kq –

ECO: C37
Opening Name: King’s Gambit Accepted: Quaade Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Nc3
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 b1c3
FEN: rnbqkbnr/pppp1p1p/8/6p1/4Pp2/2N2N2/PPPP2PP/R1BQKB1R b KQkq –

ECO: C37
Opening Name: King’s Gambit Accepted: Rosentreter Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. d4
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 d2d4
FEN: rnbqkbnr/pppp1p1p/8/6p1/3PPp2/5N2/PPP3PP/RNBQKB1R b KQkq –

ECO: C37
Opening Name: King’s Gambit Accepted: Rosentreter Gambit, Bird Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. d4 g4 5. Ne5 Qh4+ 6. g3
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 d2d4 g5g4 f3e5 d8h4 g2g3
FEN: rnb1kbnr/pppp1p1p/8/4N3/3PPppq/6P1/PPP4P/RNBQKB1R b KQkq –

ECO: C37
Opening Name: King’s Gambit Accepted: Rosentreter Gambit, Sörensen Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. d4 g4 5. Nc3
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 d2d4 g5g4 b1c3
FEN: rnbqkbnr/pppp1p1p/8/8/3PPpp1/2N2N2/PPP3PP/R1BQKB1R b KQkq –

ECO: C37
Opening Name: King’s Gambit Accepted: Rosentreter Gambit, Testa Variation
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. d4 g4 5. Bxf4
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 d2d4 g5g4 c1f4
FEN: rnbqkbnr/pppp1p1p/8/8/3PPBp1/5N2/PPP3PP/RN1QKB1R b KQkq –

ECO: C37
Opening Name: King’s Gambit Accepted: Salvio Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. Ne5
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 f3e5
FEN: rnbqkbnr/pppp1p1p/8/4N3/2B1Ppp1/8/PPPP2PP/RNBQK2R b KQkq –

ECO: C37
Opening Name: King’s Gambit Accepted: Salvio Gambit, Anderssen Counterattack
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. Ne5 Qh4+ 6. Kf1 Nh6 7. d4 d6
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 f3e5 d8h4 e1f1 g8h6 d2d4 d7d6
FEN: rnb1kb1r/ppp2p1p/3p3n/4N3/2BPPppq/8/PPP3PP/RNBQ1K1R w kq –

ECO: C37
Opening Name: King’s Gambit Accepted: Salvio Gambit, Cochrane Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. Ne5 Qh4+ 6. Kf1 f3
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 f3e5 d8h4 e1f1 f4f3
FEN: rnb1kbnr/pppp1p1p/8/4N3/2B1P1pq/5p2/PPPP2PP/RNBQ1K1R w kq –

ECO: C37
Opening Name: King’s Gambit Accepted: Salvio Gambit, Santa Maria Defense
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. Ne5 Qh4+ 6. Kf1 Nf6
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 f3e5 d8h4 e1f1 g8f6
FEN: rnb1kb1r/pppp1p1p/5n2/4N3/2B1Pppq/8/PPPP2PP/RNBQ1K1R w kq –

ECO: C37
Opening Name: King’s Gambit Accepted: Salvio Gambit, Silberschmidt Defense
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. Ne5 Qh4+ 6. Kf1 Nh6
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 f3e5 d8h4 e1f1 g8h6
FEN: rnb1kb1r/pppp1p1p/7n/4N3/2B1Pppq/8/PPPP2PP/RNBQ1K1R w kq –

ECO: C37
Opening Name: King’s Gambit Accepted: Salvio Gambit, Viennese Variation
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. Ne5 Qh4+ 6. Kf1 Nc6
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 f3e5 d8h4 e1f1 b8c6
FEN: r1b1kbnr/pppp1p1p/2n5/4N3/2B1Pppq/8/PPPP2PP/RNBQ1K1R w kq –

ECO: C37
Opening Name: King’s Gambit Accepted: Silberschmidt Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. Ne5 Qh4+ 6. Kf1 Nh6 7. d4 f3
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 f3e5 d8h4 e1f1 g8h6 d2d4 f4f3
FEN: rnb1kb1r/pppp1p1p/7n/4N3/2BPP1pq/5p2/PPP3PP/RNBQ1K1R w kq –

ECO: C37
Opening Name: King’s Gambit Accepted: Sörensen Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. d4 g4 5. Ne5
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 d2d4 g5g4 f3e5
FEN: rnbqkbnr/pppp1p1p/8/4N3/3PPpp1/8/PPP3PP/RNBQKB1R b KQkq –

ECO: C38
Opening Name: King’s Gambit Accepted: Greco Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 Bg7 5. h4 h6 6. d4 d6 7. Nc3 c6 8. hxg5 hxg5 9. Rxh8 Bxh8 10. Ne5
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 f8g7 h2h4 h7h6 d2d4 d7d6 b1c3 c7c6 h4g5 h6g5 h1h8 g7h8 f3e5
FEN: rnbqk1nb/pp3p2/2pp4/4N1p1/2BPPp2/2N5/PPP3P1/R1BQK3 b Qq –

ECO: C38
Opening Name: King’s Gambit Accepted: Hanstein Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 Bg7 5. O-O
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 f8g7 e1g1
FEN: rnbqk1nr/pppp1pbp/8/6p1/2B1Pp2/5N2/PPPP2PP/RNBQ1RK1 b kq –

ECO: C38
Opening Name: King’s Gambit Accepted: Mayet Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 Bg7 5. d4 d6 6. c3
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 f8g7 d2d4 d7d6 c2c3
FEN: rnbqk1nr/ppp2pbp/3p4/6p1/2BPPp2/2P2N2/PP4PP/RNBQK2R b KQkq –

ECO: C38
Opening Name: King’s Gambit Accepted: Philidor Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 Bg7 5. h4
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 f8g7 h2h4
FEN: rnbqk1nr/pppp1pbp/8/6p1/2B1Pp1P/5N2/PPPP2P1/RNBQK2R b KQkq –

ECO: C38
Opening Name: King’s Gambit Accepted: Philidor Gambit, Schultz Variation
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 h6 4. Bc4 d6 5. d4 g5 6. h4 Bg7 7. Qd3
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 h7h6 f1c4 d7d6 d2d4 g7g5 h2h4 f8g7 d1d3
FEN: rnbqk1nr/ppp2pb1/3p3p/6p1/2BPPp1P/3Q1N2/PPP3P1/RNB1K2R b KQkq –

ECO: C38
Opening Name: King’s Gambit Accepted: Traditional Variation
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 Bg7
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 f8g7
FEN: rnbqk1nr/pppp1pbp/8/6p1/2B1Pp2/5N2/PPPP2PP/RNBQK2R w KQkq –

ECO: C39
Opening Name: King’s Gambit Accepted: Allgaier Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ng5
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3g5
FEN: rnbqkbnr/pppp1p1p/8/6N1/4PppP/8/PPPP2P1/RNBQKB1R b KQkq –

ECO: C39
Opening Name: King’s Gambit Accepted: Allgaier Gambit, Thorold Attack
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ng5 h6 6. Nxf7 Kxf7 7. d4
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3g5 h7h6 g5f7 e8f7 d2d4
FEN: rnbq1bnr/pppp1k2/7p/8/3PPppP/8/PPP3P1/RNBQKB1R b KQ –

ECO: C39
Opening Name: King’s Gambit Accepted: Allgaier Gambit, Urusov Attack
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ng5 h6 6. Nxf7 Kxf7 7. Bc4+
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3g5 h7h6 g5f7 e8f7 f1c4
FEN: rnbq1bnr/pppp1k2/7p/8/2B1PppP/8/PPPP2P1/RNBQK2R b KQ –

ECO: C39
Opening Name: King’s Gambit Accepted: Allgaier, Blackburne Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ng5 h6 6. Nxf7 Kxf7 7. Nc3
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3g5 h7h6 g5f7 e8f7 b1c3
FEN: rnbq1bnr/pppp1k2/7p/8/4PppP/2N5/PPPP2P1/R1BQKB1R b KQ –

ECO: C39
Opening Name: King’s Gambit Accepted: Allgaier, Cook Variation
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ng5 h6 6. Nxf7 Kxf7 7. d4 d5 8. Bxf4 dxe4 9. Bc4+ Kg7 10. Be5+
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3g5 h7h6 g5f7 e8f7 d2d4 d7d5 c1f4 d5e4 f1c4 f7g7 f4e5
FEN: rnbq1bnr/ppp3k1/7p/4B3/2BPp1pP/8/PPP3P1/RN1QK2R b KQ –

ECO: C39
Opening Name: King’s Gambit Accepted: Allgaier, Horny Defense
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ng5 h6 6. Nxf7 Kxf7 7. Qxg4 Nf6 8. Qxf4 Bd6
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3g5 h7h6 g5f7 e8f7 d1g4 g8f6 g4f4 f8d6
FEN: rnbq3r/pppp1k2/3b1n1p/8/4PQ1P/8/PPPP2P1/RNB1KB1R w KQ –

ECO: C39
Opening Name: King’s Gambit Accepted: Allgaier, Schlechter Defense
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ng5 Nf6
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3g5 g8f6
FEN: rnbqkb1r/pppp1p1p/5n2/6N1/4PppP/8/PPPP2P1/RNBQKB1R w KQkq –

ECO: C39
Opening Name: King’s Gambit Accepted: Allgaier, Urusov Attack
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ng5 h6 6. Nxf7 Kxf7 7. Bc4+ d5 8. Bxd5+ Kg7 9. d4
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3g5 h7h6 g5f7 e8f7 f1c4 d7d5 c4d5 f7g7 d2d4
FEN: rnbq1bnr/ppp3k1/7p/3B4/3PPppP/8/PPP3P1/RNBQK2R b KQ –

ECO: C39
Opening Name: King’s Gambit Accepted: Kieseritzky Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5
FEN: rnbqkbnr/pppp1p1p/8/4N3/4PppP/8/PPPP2P1/RNBQKB1R b KQkq –

ECO: C39
Opening Name: King’s Gambit Accepted: Kieseritzky Gambit, Anderssen Defense
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Nf6 6. Bc4 d5 7. exd5 Bd6
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 g8f6 f1c4 d7d5 e4d5 f8d6
FEN: rnbqk2r/ppp2p1p/3b1n2/3PN3/2B2ppP/8/PPPP2P1/RNBQK2R w KQkq –

ECO: C39
Opening Name: King’s Gambit Accepted: Kieseritzky Gambit, Anderssen-Cordel Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Nf6 6. Bc4 d5 7. exd5 Bd6 8. d4 Nh5 9. Bxf4 Nxf4
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 g8f6 f1c4 d7d5 e4d5 f8d6 d2d4 f6h5 c1f4 h5f4
FEN: rnbqk2r/ppp2p1p/3b4/3PN3/2BP1npP/8/PPP3P1/RN1QK2R w KQkq –

ECO: C39
Opening Name: King’s Gambit Accepted: Kieseritzky Gambit, Berlin Defense
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Nf6
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 g8f6
FEN: rnbqkb1r/pppp1p1p/5n2/4N3/4PppP/8/PPPP2P1/RNBQKB1R w KQkq –

ECO: C39
Opening Name: King’s Gambit Accepted: Kieseritzky Gambit, Berlin Defense, Rubinstein Variation
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Nf6 6. d4
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 g8f6 d2d4
FEN: rnbqkb1r/pppp1p1p/5n2/4N3/3PPppP/8/PPP3P1/RNBQKB1R b KQkq –

ECO: C39
Opening Name: King’s Gambit Accepted: Kieseritzky Gambit, Berlin Defense, de Riviere Variation
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Nf6 6. Nxg4 d5
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 g8f6 e5g4 d7d5
FEN: rnbqkb1r/ppp2p1p/5n2/3p4/4PpNP/8/PPPP2P1/RNBQKB1R w KQkq –

ECO: C39
Opening Name: King’s Gambit Accepted: Kieseritzky Gambit, Brentano Defense
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 d5
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 d7d5
FEN: rnbqkbnr/ppp2p1p/8/3pN3/4PppP/8/PPPP2P1/RNBQKB1R w KQkq –

ECO: C39
Opening Name: King’s Gambit Accepted: Kieseritzky Gambit, Brentano Defense
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 d5 6. d4 Nf6 7. Bxf4
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 d7d5 d2d4 g8f6 c1f4
FEN: rnbqkb1r/ppp2p1p/5n2/3pN3/3PPBpP/8/PPP3P1/RN1QKB1R b KQkq –

ECO: C39
Opening Name: King’s Gambit Accepted: Kieseritzky Gambit, Brentano Defense, Caro Variation
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 d5 6. d4 Nf6 7. Bxf4 Nxe4 8. Nd2
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 d7d5 d2d4 g8f6 c1f4 f6e4 b1d2
FEN: rnbqkb1r/ppp2p1p/8/3pN3/3PnBpP/8/PPPN2P1/R2QKB1R b KQkq –

ECO: C39
Opening Name: King’s Gambit Accepted: Kieseritzky Gambit, Cotter Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ng5 h6 6. Nxf7
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3g5 h7h6 g5f7
FEN: rnbqkbnr/pppp1N2/7p/8/4PppP/8/PPPP2P1/RNBQKB1R b KQkq –

ECO: C39
Opening Name: King’s Gambit Accepted: Kieseritzky Gambit, Kolisch Defense
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 d6
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 d7d6
FEN: rnbqkbnr/ppp2p1p/3p4/4N3/4PppP/8/PPPP2P1/RNBQKB1R w KQkq –

ECO: C39
Opening Name: King’s Gambit Accepted: Kieseritzky Gambit, Long Whip
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 h5
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 h7h5
FEN: rnbqkbnr/pppp1p2/8/4N2p/4PppP/8/PPPP2P1/RNBQKB1R w KQkq –

ECO: C39
Opening Name: King’s Gambit Accepted: Kieseritzky Gambit, Neumann Defense
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Nc6
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 b8c6
FEN: r1bqkbnr/pppp1p1p/2n5/4N3/4PppP/8/PPPP2P1/RNBQKB1R w KQkq –

ECO: C39
Opening Name: King’s Gambit Accepted: Kieseritzky Gambit, Paulsen Defense
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Bg7
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 f8g7
FEN: rnbqk1nr/pppp1pbp/8/4N3/4PppP/8/PPPP2P1/RNBQKB1R w KQkq –

ECO: C39
Opening Name: King’s Gambit Accepted: Kieseritzky Gambit, Paulsen Defense Deferred
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Nf6 6. Bc4 d5 7. exd5 Bg7
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 g8f6 f1c4 d7d5 e4d5 f8g7
FEN: rnbqk2r/ppp2pbp/5n2/3PN3/2B2ppP/8/PPPP2P1/RNBQK2R w KQkq –

ECO: C39
Opening Name: King’s Gambit Accepted: Kieseritzky Gambit, Rice Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Nf6 6. Bc4 d5 7. exd5 Bd6 8. O-O Bxe5
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 g8f6 f1c4 d7d5 e4d5 f8d6 e1g1 d6e5
FEN: rnbqk2r/ppp2p1p/5n2/3Pb3/2B2ppP/8/PPPP2P1/RNBQ1RK1 w kq –

ECO: C39
Opening Name: King’s Gambit Accepted: Kieseritzky Gambit, Rosenthal Defense
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Qe7
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 d8e7
FEN: rnb1kbnr/ppppqp1p/8/4N3/4PppP/8/PPPP2P1/RNBQKB1R w KQkq –

ECO: C39
Opening Name: King’s Gambit Accepted: Kieseritzky, Long Whip Defense, Jaenisch Variation
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 h5 6. Bc4 Rh7 7. d4 Bh6 8. Nc3
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 h7h5 f1c4 h8h7 d2d4 f8h6 b1c3
FEN: rnbqk1n1/pppp1p1r/7b/4N2p/2BPPppP/2N5/PPP3P1/R1BQK2R b KQq –

ECO: C39
Opening Name: King’s Gambit Accepted: Kieseritzky, Polerio Defense
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Be7
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 f8e7
FEN: rnbqk1nr/ppppbp1p/8/4N3/4PppP/8/PPPP2P1/RNBQKB1R w KQkq –

ECO: C39
Opening Name: King’s Gambit Accepted: Kieseritzky, Rice Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Nf6 6. Bc4 d5 7. exd5 Bd6 8. O-O
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 g8f6 f1c4 d7d5 e4d5 f8d6 e1g1
FEN: rnbqk2r/ppp2p1p/3b1n2/3PN3/2B2ppP/8/PPPP2P1/RNBQ1RK1 b kq –

ECO: C39
Opening Name: King’s Gambit Accepted: Kieseritzky, Salvio Defense, Cozio Variation
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Qe7 6. d4 f5 7. Bc4
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 d8e7 d2d4 f7f5 f1c4
FEN: rnb1kbnr/ppppq2p/8/4Np2/2BPPppP/8/PPP3P1/RNBQK2R b KQkq –

ECO: C39
Opening Name: King’s Gambit Accepted: King’s Knight’s Gambit
SAN: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4
UCI: e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4
FEN: rnbqkbnr/pppp1p1p/8/6p1/4Pp1P/5N2/PPPP2P1/RNBQKB1R b KQkq –

ECO: C40
Opening Name: Elephant Gambit
SAN: 1. e4 e5 2. Nf3 d5
UCI: e2e4 e7e5 g1f3 d7d5
FEN: rnbqkbnr/ppp2ppp/8/3pp3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq –

ECO: C40
Opening Name: Elephant Gambit: Maróczy Gambit
SAN: 1. e4 e5 2. Nf3 d5 3. exd5 Bd6
UCI: e2e4 e7e5 g1f3 d7d5 e4d5 f8d6
FEN: rnbqk1nr/ppp2ppp/3b4/3Pp3/8/5N2/PPPP1PPP/RNBQKB1R w KQkq –

ECO: C40
Opening Name: Elephant Gambit: Paulsen Countergambit
SAN: 1. e4 e5 2. Nf3 d5 3. exd5 e4
UCI: e2e4 e7e5 g1f3 d7d5 e4d5 e5e4
FEN: rnbqkbnr/ppp2ppp/8/3P4/4p3/5N2/PPPP1PPP/RNBQKB1R w KQkq –

ECO: C40
Opening Name: Elephant Gambit: Wasp Variation
SAN: 1. e4 e5 2. Nf3 d5 3. Nxe5 dxe4 4. Bc4 Qg5
UCI: e2e4 e7e5 g1f3 d7d5 f3e5 d5e4 f1c4 d8g5
FEN: rnb1kbnr/ppp2ppp/8/4N1q1/2B1p3/8/PPPP1PPP/RNBQK2R w KQkq –

ECO: C40
Opening Name: Gunderam Defense
SAN: 1. e4 e5 2. Nf3 Qe7
UCI: e2e4 e7e5 g1f3 d8e7
FEN: rnb1kbnr/ppppqppp/8/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq –

ECO: C40
Opening Name: King’s Knight Opening
SAN: 1. e4 e5 2. Nf3
UCI: e2e4 e7e5 g1f3
FEN: rnbqkbnr/pppp1ppp/8/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq –

ECO: C40
Opening Name: King’s Pawn Game: Busch-Gass Gambit
SAN: 1. e4 e5 2. Nf3 Bc5
UCI: e2e4 e7e5 g1f3 f8c5
FEN: rnbqk1nr/pppp1ppp/8/2b1p3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq –

ECO: C40
Opening Name: King’s Pawn Game: Busch-Gass Gambit, Chiodini Gambit
SAN: 1. e4 e5 2. Nf3 Bc5 3. Nxe5 Nc6
UCI: e2e4 e7e5 g1f3 f8c5 f3e5 b8c6
FEN: r1bqk1nr/pppp1ppp/2n5/2b1N3/4P3/8/PPPP1PPP/RNBQKB1R w KQkq –

ECO: C40
Opening Name: King’s Pawn Game: Damiano Defense
SAN: 1. e4 e5 2. Nf3 f6
UCI: e2e4 e7e5 g1f3 f7f6
FEN: rnbqkbnr/pppp2pp/5p2/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq –

ECO: C40
Opening Name: King’s Pawn Game: Damiano Defense, Damiano Gambit
SAN: 1. e4 e5 2. Nf3 f6 3. Nxe5 fxe5 4. Qh5+ g6 5. Qxe5+ Qe7 6. Qxh8
UCI: e2e4 e7e5 g1f3 f7f6 f3e5 f6e5 d1h5 g7g6 h5e5 d8e7 e5h8
FEN: rnb1kbnQ/ppppq2p/6p1/8/4P3/8/PPPP1PPP/RNB1KB1R b KQq –

ECO: C40
Opening Name: King’s Pawn Game: Damiano Defense, Damiano Gambit, Chigorin Gambit
SAN: 1. e4 e5 2. Nf3 f6 3. Nxe5 Qe7 4. Nf3 d5
UCI: e2e4 e7e5 g1f3 f7f6 f3e5 d8e7 e5f3 d7d5
FEN: rnb1kbnr/ppp1q1pp/5p2/3p4/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq –

ECO: C40
Opening Name: King’s Pawn Game: Gunderam Defense, Gunderam Gambit
SAN: 1. e4 e5 2. Nf3 Qe7 3. Bc4 f5
UCI: e2e4 e7e5 g1f3 d8e7 f1c4 f7f5
FEN: rnb1kbnr/ppppq1pp/8/4pp2/2B1P3/5N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: C40
Opening Name: King’s Pawn Game: Gunderam Gambit
SAN: 1. e4 e5 2. Nf3 c6
UCI: e2e4 e7e5 g1f3 c7c6
FEN: rnbqkbnr/pp1p1ppp/2p5/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq –

ECO: C40
Opening Name: King’s Pawn Game: La Bourdonnais Gambit
SAN: 1. e4 e5 2. Nf3 Qf6 3. Bc4 Qg6 4. O-O
UCI: e2e4 e7e5 g1f3 d8f6 f1c4 f6g6 e1g1
FEN: rnb1kbnr/pppp1ppp/6q1/4p3/2B1P3/5N2/PPPP1PPP/RNBQ1RK1 b kq –

ECO: C40
Opening Name: King’s Pawn Game: McConnell Defense
SAN: 1. e4 e5 2. Nf3 Qf6
UCI: e2e4 e7e5 g1f3 d8f6
FEN: rnb1kbnr/pppp1ppp/5q2/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq –

ECO: C40
Opening Name: Latvian Gambit
SAN: 1. e4 e5 2. Nf3 f5
UCI: e2e4 e7e5 g1f3 f7f5
FEN: rnbqkbnr/pppp2pp/8/4pp2/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq –

ECO: C40
Opening Name: Latvian Gambit Accepted
SAN: 1. e4 e5 2. Nf3 f5 3. exf5
UCI: e2e4 e7e5 g1f3 f7f5 e4f5
FEN: rnbqkbnr/pppp2pp/8/4pP2/8/5N2/PPPP1PPP/RNBQKB1R b KQkq –

ECO: C40
Opening Name: Latvian Gambit Accepted: Bilguer Variation
SAN: 1. e4 e5 2. Nf3 f5 3. Nxe5 Qf6 4. d4 d6 5. Nc4
UCI: e2e4 e7e5 g1f3 f7f5 f3e5 d8f6 d2d4 d7d6 e5c4
FEN: rnb1kbnr/ppp3pp/3p1q2/5p2/2NPP3/8/PPP2PPP/RNBQKB1R b KQkq –

ECO: C40
Opening Name: Latvian Gambit Accepted: Bronstein Attack
SAN: 1. e4 e5 2. Nf3 f5 3. Nxe5 Qf6 4. d4 d6 5. Nc4 fxe4 6. Be2
UCI: e2e4 e7e5 g1f3 f7f5 f3e5 d8f6 d2d4 d7d6 e5c4 f5e4 f1e2
FEN: rnb1kbnr/ppp3pp/3p1q2/8/2NPp3/8/PPP1BPPP/RNBQK2R b KQkq –

ECO: C40
Opening Name: Latvian Gambit Accepted: Bronstein Gambit
SAN: 1. e4 e5 2. Nf3 f5 3. Nxe5 Qf6 4. d4 d6 5. Nc4 fxe4 6. Qh5+ g6 7. Qe2
UCI: e2e4 e7e5 g1f3 f7f5 f3e5 d8f6 d2d4 d7d6 e5c4 f5e4 d1h5 g7g6 h5e2
FEN: rnb1kbnr/ppp4p/3p1qp1/8/2NPp3/8/PPP1QPPP/RNB1KB1R b KQkq –

ECO: C40
Opening Name: Latvian Gambit Accepted: Foltys Variation
SAN: 1. e4 e5 2. Nf3 f5 3. Nxe5 Qf6 4. Nc4 fxe4 5. d3
UCI: e2e4 e7e5 g1f3 f7f5 f3e5 d8f6 e5c4 f5e4 d2d3
FEN: rnb1kbnr/pppp2pp/5q2/8/2N1p3/3P4/PPP2PPP/RNBQKB1R b KQkq –

ECO: C40
Opening Name: Latvian Gambit Accepted: Foltys-Leonhardt Variation
SAN: 1. e4 e5 2. Nf3 f5 3. Nxe5 Qf6 4. Nc4
UCI: e2e4 e7e5 g1f3 f7f5 f3e5 d8f6 e5c4
FEN: rnb1kbnr/pppp2pp/5q2/5p2/2N1P3/8/PPPP1PPP/RNBQKB1R b KQkq –

ECO: C40
Opening Name: Latvian Gambit Accepted: Leonhardt Variation
SAN: 1. e4 e5 2. Nf3 f5 3. Nxe5 Qf6 4. Nc4 fxe4 5. Nc3
UCI: e2e4 e7e5 g1f3 f7f5 f3e5 d8f6 e5c4 f5e4 b1c3
FEN: rnb1kbnr/pppp2pp/5q2/8/2N1p3/2N5/PPPP1PPP/R1BQKB1R b KQkq –

ECO: C40
Opening Name: Latvian Gambit Accepted: Main Line
SAN: 1. e4 e5 2. Nf3 f5 3. Nxe5 Qf6 4. d4
UCI: e2e4 e7e5 g1f3 f7f5 f3e5 d8f6 d2d4
FEN: rnb1kbnr/pppp2pp/5q2/4Np2/3PP3/8/PPP2PPP/RNBQKB1R b KQkq –

ECO: C40
Opening Name: Latvian Gambit Accepted: Nimzowitsch Attack
SAN: 1. e4 e5 2. Nf3 f5 3. Nxe5 Qf6 4. d4 d6 5. Nc4 fxe4 6. Ne3
UCI: e2e4 e7e5 g1f3 f7f5 f3e5 d8f6 d2d4 d7d6 e5c4 f5e4 c4e3
FEN: rnb1kbnr/ppp3pp/3p1q2/8/3Pp3/4N3/PPP2PPP/RNBQKB1R b KQkq –

ECO: C40
Opening Name: Latvian Gambit: Behting Variation
SAN: 1. e4 e5 2. Nf3 f5 3. Bc4 fxe4 4. Nxe5 Qg5 5. Nf7 Qxg2 6. Rf1 d5 7. Nxh8 Nf6
UCI: e2e4 e7e5 g1f3 f7f5 f1c4 f5e4 f3e5 d8g5 e5f7 g5g2 h1f1 d7d5 f7h8 g8f6
FEN: rnb1kb1N/ppp3pp/5n2/3p4/2B1p3/8/PPPP1PqP/RNBQKR2 w Qq –

ECO: C40
Opening Name: Latvian Gambit: Corkscrew Countergambit
SAN: 1. e4 e5 2. Nf3 f5 3. Bc4 fxe4 4. Nxe5 Nf6
UCI: e2e4 e7e5 g1f3 f7f5 f1c4 f5e4 f3e5 g8f6
FEN: rnbqkb1r/pppp2pp/5n2/4N3/2B1p3/8/PPPP1PPP/RNBQK2R w KQkq –

ECO: C40
Opening Name: Latvian Gambit: Corkscrew Gambit
SAN: 1. e4 e5 2. Nf3 f5 3. Nxe5 Nf6 4. Bc4 fxe4 5. Nf7 Qe7 6. Nxh8 d5
UCI: e2e4 e7e5 g1f3 f7f5 f3e5 g8f6 f1c4 f5e4 e5f7 d8e7 f7h8 d7d5
FEN: rnb1kb1N/ppp1q1pp/5n2/3p4/2B1p3/8/PPPP1PPP/RNBQK2R w KQq –

ECO: C40
Opening Name: Latvian Gambit: Diepstraten Countergambit
SAN: 1. e4 e5 2. Nf3 f5 3. c4
UCI: e2e4 e7e5 g1f3 f7f5 c2c4
FEN: rnbqkbnr/pppp2pp/8/4pp2/2P1P3/5N2/PP1P1PPP/RNBQKB1R b KQkq –

ECO: C40
Opening Name: Latvian Gambit: Fraser Defense
SAN: 1. e4 e5 2. Nf3 f5 3. Nxe5 Nc6
UCI: e2e4 e7e5 g1f3 f7f5 f3e5 b8c6
FEN: r1bqkbnr/pppp2pp/2n5/4Np2/4P3/8/PPPP1PPP/RNBQKB1R w KQkq –

ECO: C40
Opening Name: Latvian Gambit: Greco Variation
SAN: 1. e4 e5 2. Nf3 f5 3. Nxe5 Qe7
UCI: e2e4 e7e5 g1f3 f7f5 f3e5 d8e7
FEN: rnb1kbnr/ppppq1pp/8/4Np2/4P3/8/PPPP1PPP/RNBQKB1R w KQkq –

ECO: C40
Opening Name: Latvian Gambit: Lobster Gambit
SAN: 1. e4 e5 2. Nf3 f5 3. g4
UCI: e2e4 e7e5 g1f3 f7f5 g2g4
FEN: rnbqkbnr/pppp2pp/8/4pp2/4P1P1/5N2/PPPP1P1P/RNBQKB1R b KQkq –

ECO: C40
Opening Name: Latvian Gambit: Mason Countergambit
SAN: 1. e4 e5 2. Nf3 f5 3. d4
UCI: e2e4 e7e5 g1f3 f7f5 d2d4
FEN: rnbqkbnr/pppp2pp/8/4pp2/3PP3/5N2/PPP2PPP/RNBQKB1R b KQkq –

ECO: C40
Opening Name: Latvian Gambit: Mayet Attack
SAN: 1. e4 e5 2. Nf3 f5 3. Bc4
UCI: e2e4 e7e5 g1f3 f7f5 f1c4
FEN: rnbqkbnr/pppp2pp/8/4pp2/2B1P3/5N2/PPPP1PPP/RNBQK2R b KQkq –

ECO: C40
Opening Name: Latvian Gambit: Mayet Attack, Morgado Defense
SAN: 1. e4 e5 2. Nf3 f5 3. Bc4 Nf6
UCI: e2e4 e7e5 g1f3 f7f5 f1c4 g8f6
FEN: rnbqkb1r/pppp2pp/5n2/4pp2/2B1P3/5N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: C40
Opening Name: Latvian Gambit: Mayet Attack, Poisoned Pawn Variation
SAN: 1. e4 e5 2. Nf3 f5 3. Bc4 fxe4 4. Nxe5 Qg5 5. d4 Qxg2
UCI: e2e4 e7e5 g1f3 f7f5 f1c4 f5e4 f3e5 d8g5 d2d4 g5g2
FEN: rnb1kbnr/pppp2pp/8/4N3/2BPp3/8/PPP2PqP/RNBQK2R w KQkq –

ECO: C40
Opening Name: Latvian Gambit: Mayet Attack, Polerio-Svedenborg Variation
SAN: 1. e4 e5 2. Nf3 f5 3. Bc4 fxe4 4. Nxe5 d5
UCI: e2e4 e7e5 g1f3 f7f5 f1c4 f5e4 f3e5 d7d5
FEN: rnbqkbnr/ppp3pp/8/3pN3/2B1p3/8/PPPP1PPP/RNBQK2R w KQkq –

ECO: C40
Opening Name: Latvian Gambit: Mayet Attack, Strautins Gambit
SAN: 1. e4 e5 2. Nf3 f5 3. Bc4 b5
UCI: e2e4 e7e5 g1f3 f7f5 f1c4 b7b5
FEN: rnbqkbnr/p1pp2pp/8/1p2pp2/2B1P3/5N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: C40
Opening Name: Latvian Gambit: Mlotkowski Variation
SAN: 1. e4 e5 2. Nf3 f5 3. Nc3
UCI: e2e4 e7e5 g1f3 f7f5 b1c3
FEN: rnbqkbnr/pppp2pp/8/4pp2/4P3/2N2N2/PPPP1PPP/R1BQKB1R b KQkq –

ECO: C40
Opening Name: Latvian Gambit: Senechaud Gambit
SAN: 1. e4 e5 2. Nf3 f5 3. b4
UCI: e2e4 e7e5 g1f3 f7f5 b2b4
FEN: rnbqkbnr/pppp2pp/8/4pp2/1P2P3/5N2/P1PP1PPP/RNBQKB1R b KQkq –

ECO: C41
Opening Name: Philidor Defense
SAN: 1. e4 e5 2. Nf3 d6
UCI: e2e4 e7e5 g1f3 d7d6
FEN: rnbqkbnr/ppp2ppp/3p4/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq –

ECO: C41
Opening Name: Philidor Defense
SAN: 1. e4 e5 2. Nf3 d6 3. d4
UCI: e2e4 e7e5 g1f3 d7d6 d2d4
FEN: rnbqkbnr/ppp2ppp/3p4/4p3/3PP3/5N2/PPP2PPP/RNBQKB1R b KQkq –

ECO: C41
Opening Name: Philidor Defense
SAN: 1. e4 e5 2. Nf3 d6 3. Bc4
UCI: e2e4 e7e5 g1f3 d7d6 f1c4
FEN: rnbqkbnr/ppp2ppp/3p4/4p3/2B1P3/5N2/PPPP1PPP/RNBQK2R b KQkq –

ECO: C41
Opening Name: Philidor Defense
SAN: 1. e4 e5 2. Nf3 d6 3. Bc4 Be7
UCI: e2e4 e7e5 g1f3 d7d6 f1c4 f8e7
FEN: rnbqk1nr/ppp1bppp/3p4/4p3/2B1P3/5N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: C41
Opening Name: Philidor Defense: Albin-Blackburne Gambit
SAN: 1. e4 e5 2. Nf3 d6 3. d4 Bg4 4. dxe5 Nd7
UCI: e2e4 e7e5 g1f3 d7d6 d2d4 c8g4 d4e5 b8d7
FEN: r2qkbnr/pppn1ppp/3p4/4P3/4P1b1/5N2/PPP2PPP/RNBQKB1R w KQkq –

ECO: C41
Opening Name: Philidor Defense: Berger Variation
SAN: 1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Nxd4 Nf6 5. Nc3 Be7 6. Be2 O-O 7. O-O c5 8. Nf3 Nc6 9. Bg5 Be6 10. Re1
UCI: e2e4 e7e5 g1f3 d7d6 d2d4 e5d4 f3d4 g8f6 b1c3 f8e7 f1e2 e8g8 e1g1 c7c5 d4f3 b8c6 c1g5 c8e6 f1e1
FEN: r2q1rk1/pp2bppp/2npbn2/2p3B1/4P3/2N2N2/PPP1BPPP/R2QR1K1 b – –

ECO: C41
Opening Name: Philidor Defense: Bird Gambit
SAN: 1. e4 e5 2. Nf3 d6 3. d4 exd4 4. c3
UCI: e2e4 e7e5 g1f3 d7d6 d2d4 e5d4 c2c3
FEN: rnbqkbnr/ppp2ppp/3p4/8/3pP3/2P2N2/PP3PPP/RNBQKB1R b KQkq –

ECO: C41
Opening Name: Philidor Defense: Boden Variation
SAN: 1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Qxd4 Bd7
UCI: e2e4 e7e5 g1f3 d7d6 d2d4 e5d4 d1d4 c8d7
FEN: rn1qkbnr/pppb1ppp/3p4/8/3QP3/5N2/PPP2PPP/RNB1KB1R w KQkq –

ECO: C41
Opening Name: Philidor Defense: Exchange Variation
SAN: 1. e4 e5 2. Nf3 d6 3. d4 exd4
UCI: e2e4 e7e5 g1f3 d7d6 d2d4 e5d4
FEN: rnbqkbnr/ppp2ppp/3p4/8/3pP3/5N2/PPP2PPP/RNBQKB1R w KQkq –

ECO: C41
Opening Name: Philidor Defense: Exchange Variation
SAN: 1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Nxd4
UCI: e2e4 e7e5 g1f3 d7d6 d2d4 e5d4 f3d4
FEN: rnbqkbnr/ppp2ppp/3p4/8/3NP3/8/PPP2PPP/RNBQKB1R b KQkq –

ECO: C41
Opening Name: Philidor Defense: Exchange Variation
SAN: 1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Nxd4 Nf6
UCI: e2e4 e7e5 g1f3 d7d6 d2d4 e5d4 f3d4 g8f6
FEN: rnbqkb1r/ppp2ppp/3p1n2/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq –

ECO: C41
Opening Name: Philidor Defense: Hanham Variation
SAN: 1. e4 e5 2. Nf3 d6 3. d4 Nd7
UCI: e2e4 e7e5 g1f3 d7d6 d2d4 b8d7
FEN: r1bqkbnr/pppn1ppp/3p4/4p3/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq –

ECO: C41
Opening Name: Philidor Defense: Hanham Variation, Delmar Variation
SAN: 1. e4 e5 2. Nf3 d6 3. d4 Nd7 4. Bc4 c6 5. c3
UCI: e2e4 e7e5 g1f3 d7d6 d2d4 b8d7 f1c4 c7c6 c2c3
FEN: r1bqkbnr/pp1n1ppp/2pp4/4p3/2BPP3/2P2N2/PP3PPP/RNBQK2R b KQkq –

ECO: C41
Opening Name: Philidor Defense: Hanham Variation, Krause Variation
SAN: 1. e4 e5 2. Nf3 d6 3. d4 Nd7 4. Bc4 c6 5. O-O
UCI: e2e4 e7e5 g1f3 d7d6 d2d4 b8d7 f1c4 c7c6 e1g1
FEN: r1bqkbnr/pp1n1ppp/2pp4/4p3/2BPP3/5N2/PPP2PPP/RNBQ1RK1 b kq –

ECO: C41
Opening Name: Philidor Defense: Hanham Variation, Schlechter Variation
SAN: 1. e4 e5 2. Nf3 d6 3. d4 Nd7 4. Bc4 c6 5. Nc3
UCI: e2e4 e7e5 g1f3 d7d6 d2d4 b8d7 f1c4 c7c6 b1c3
FEN: r1bqkbnr/pp1n1ppp/2pp4/4p3/2BPP3/2N2N2/PPP2PPP/R1BQK2R b KQkq –

ECO: C41
Opening Name: Philidor Defense: Hanham Variation, Sharp Variation
SAN: 1. e4 e5 2. Nf3 d6 3. d4 Nd7 4. Bc4 Nb6
UCI: e2e4 e7e5 g1f3 d7d6 d2d4 b8d7 f1c4 d7b6
FEN: r1bqkbnr/ppp2ppp/1n1p4/4p3/2BPP3/5N2/PPP2PPP/RNBQK2R w KQkq –

ECO: C41
Opening Name: Philidor Defense: Hanham Variation, Steiner Variation
SAN: 1. e4 e5 2. Nf3 d6 3. d4 Nd7 4. Bc4 c6 5. O-O Be7 6. dxe5
UCI: e2e4 e7e5 g1f3 d7d6 d2d4 b8d7 f1c4 c7c6 e1g1 f8e7 d4e5
FEN: r1bqk1nr/pp1nbppp/2pp4/4P3/2B1P3/5N2/PPP2PPP/RNBQ1RK1 b kq –

ECO: C41
Opening Name: Philidor Defense: Hanham, Kmoch Variation
SAN: 1. e4 e5 2. Nf3 d6 3. d4 Nd7 4. Bc4 c6 5. Ng5
UCI: e2e4 e7e5 g1f3 d7d6 d2d4 b8d7 f1c4 c7c6 f3g5
FEN: r1bqkbnr/pp1n1ppp/2pp4/4p1N1/2BPP3/8/PPP2PPP/RNBQK2R b KQkq –

ECO: C41
Opening Name: Philidor Defense: Larsen Variation
SAN: 1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Nxd4 g6
UCI: e2e4 e7e5 g1f3 d7d6 d2d4 e5d4 f3d4 g7g6
FEN: rnbqkbnr/ppp2p1p/3p2p1/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq –

ECO: C41
Opening Name: Philidor Defense: Lion Variation
SAN: 1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. Nc3 Nbd7
UCI: e2e4 e7e5 g1f3 d7d6 d2d4 g8f6 b1c3 b8d7
FEN: r1bqkb1r/pppn1ppp/3p1n2/4p3/3PP3/2N2N2/PPP2PPP/R1BQKB1R w KQkq –

ECO: C41
Opening Name: Philidor Defense: Lion Variation, Bishop Sacrifice
SAN: 1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. Nc3 Nbd7 5. Bc4 Be7 6. Bxf7+
UCI: e2e4 e7e5 g1f3 d7d6 d2d4 g8f6 b1c3 b8d7 f1c4 f8e7 c4f7
FEN: r1bqk2r/pppnbBpp/3p1n2/4p3/3PP3/2N2N2/PPP2PPP/R1BQK2R b KQkq –

ECO: C41
Opening Name: Philidor Defense: Lion Variation, Delayed Bishop Sacrifice
SAN: 1. e4 d6 2. d4 Nf6 3. Nc3 Nbd7 4. Nf3 e5 5. Bc4 Be7 6. dxe5 dxe5 7. Bxf7+
UCI: e2e4 d7d6 d2d4 g8f6 b1c3 b8d7 g1f3 e7e5 f1c4 f8e7 d4e5 d6e5 c4f7
FEN: r1bqk2r/pppnbBpp/5n2/4p3/4P3/2N2N2/PPP2PPP/R1BQK2R b KQkq –

ECO: C41
Opening Name: Philidor Defense: Lion Variation, Forcing Line
SAN: 1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. Nc3 Nbd7 5. Bc4 Be7 6. Ng5 O-O 7. Bxf7+ Rxf7 8. Ne6
UCI: e2e4 e7e5 g1f3 d7d6 d2d4 g8f6 b1c3 b8d7 f1c4 f8e7 f3g5 e8g8 c4f7 f8f7 g5e6
FEN: r1bq2k1/pppnbrpp/3pNn2/4p3/3PP3/2N5/PPP2PPP/R1BQK2R b KQ –

ECO: C41
Opening Name: Philidor Defense: Lion Variation, Lion’s Claw, with Bc4 and h6
SAN: 1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. Nc3 Nbd7 5. Bc4 Be7 6. O-O h6
UCI: e2e4 e7e5 g1f3 d7d6 d2d4 g8f6 b1c3 b8d7 f1c4 f8e7 e1g1 h7h6
FEN: r1bqk2r/pppnbpp1/3p1n1p/4p3/2BPP3/2N2N2/PPP2PPP/R1BQ1RK1 w kq –

ECO: C41
Opening Name: Philidor Defense: Lion Variation, Lion’s Claw, with Be2 and c6
SAN: 1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. Nc3 Nbd7 5. Be2 Be7 6. O-O c6
UCI: e2e4 e7e5 g1f3 d7d6 d2d4 g8f6 b1c3 b8d7 f1e2 f8e7 e1g1 c7c6
FEN: r1bqk2r/pp1nbppp/2pp1n2/4p3/3PP3/2N2N2/PPP1BPPP/R1BQ1RK1 w kq –

ECO: C41
Opening Name: Philidor Defense: Lion Variation, Shirov Gambit
SAN: 1. e4 e5 2. Nf3 d6 3. d4 Nd7 4. Nc3 Ngf6 5. g4
UCI: e2e4 e7e5 g1f3 d7d6 d2d4 b8d7 b1c3 g8f6 g2g4
FEN: r1bqkb1r/pppn1ppp/3p1n2/4p3/3PP1P1/2N2N2/PPP2P1P/R1BQKB1R b KQkq –

ECO: C41
Opening Name: Philidor Defense: Lion Variation, Sozin Variation
SAN: 1. e4 d6 2. d4 Nf6 3. Nc3 e5 4. Nf3 Nbd7 5. Bc4 Be7 6. O-O O-O 7. Qe2 c6 8. a4 exd4
UCI: e2e4 d7d6 d2d4 g8f6 b1c3 e7e5 g1f3 b8d7 f1c4 f8e7 e1g1 e8g8 d1e2 c7c6 a2a4 e5d4
FEN: r1bq1rk1/pp1nbppp/2pp1n2/8/P1BpP3/2N2N2/1PP1QPPP/R1B2RK1 w – –

ECO: C41
Opening Name: Philidor Defense: Lopez Countergambit
SAN: 1. e4 e5 2. Nf3 d6 3. Bc4 f5
UCI: e2e4 e7e5 g1f3 d7d6 f1c4 f7f5
FEN: rnbqkbnr/ppp3pp/3p4/4pp2/2B1P3/5N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: C41
Opening Name: Philidor Defense: Lopez Countergambit, Jaenisch Variation
SAN: 1. e4 e5 2. Nf3 d6 3. d4 f5 4. Bc4 exd4 5. Ng5 Nh6 6. Nxh7
UCI: e2e4 e7e5 g1f3 d7d6 d2d4 f7f5 f1c4 e5d4 f3g5 g8h6 g5h7
FEN: rnbqkb1r/ppp3pN/3p3n/5p2/2BpP3/8/PPP2PPP/RNBQK2R b KQkq –

ECO: C41
Opening Name: Philidor Defense: Morphy Gambit
SAN: 1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Bc4
UCI: e2e4 e7e5 g1f3 d7d6 d2d4 e5d4 f1c4
FEN: rnbqkbnr/ppp2ppp/3p4/8/2BpP3/5N2/PPP2PPP/RNBQK2R b KQkq –

ECO: C41
Opening Name: Philidor Defense: Nimzowitsch Variation
SAN: 1. e4 e5 2. Nf3 d6 3. d4 Nf6
UCI: e2e4 e7e5 g1f3 d7d6 d2d4 g8f6
FEN: rnbqkb1r/ppp2ppp/3p1n2/4p3/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq –

ECO: C41
Opening Name: Philidor Defense: Nimzowitsch Variation
SAN: 1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. dxe5
UCI: e2e4 e7e5 g1f3 d7d6 d2d4 g8f6 d4e5
FEN: rnbqkb1r/ppp2ppp/3p1n2/4P3/4P3/5N2/PPP2PPP/RNBQKB1R b KQkq –

ECO: C41
Opening Name: Philidor Defense: Nimzowitsch Variation, Klein Variation
SAN: 1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. Bc4
UCI: e2e4 e7e5 g1f3 d7d6 d2d4 g8f6 f1c4
FEN: rnbqkb1r/ppp2ppp/3p1n2/4p3/2BPP3/5N2/PPP2PPP/RNBQK2R b KQkq –

ECO: C41
Opening Name: Philidor Defense: Nimzowitsch Variation, Rellstab Variation
SAN: 1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. dxe5 Nxe4 5. Qd5
UCI: e2e4 e7e5 g1f3 d7d6 d2d4 g8f6 d4e5 f6e4 d1d5
FEN: rnbqkb1r/ppp2ppp/3p4/3QP3/4n3/5N2/PPP2PPP/RNB1KB1R b KQkq –

ECO: C41
Opening Name: Philidor Defense: Nimzowitsch Variation, Sokolsky Variation
SAN: 1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. dxe5 Nxe4 5. Nbd2
UCI: e2e4 e7e5 g1f3 d7d6 d2d4 g8f6 d4e5 f6e4 b1d2
FEN: rnbqkb1r/ppp2ppp/3p4/4P3/4n3/5N2/PPPN1PPP/R1BQKB1R b KQkq –

ECO: C41
Opening Name: Philidor Defense: Nimzowitsch, Larobok Variation
SAN: 1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. Nc3 Nbd7 5. Bc4 Be7 6. Ng5 O-O 7. Bxf7+
UCI: e2e4 e7e5 g1f3 d7d6 d2d4 g8f6 b1c3 b8d7 f1c4 f8e7 f3g5 e8g8 c4f7
FEN: r1bq1rk1/pppnbBpp/3p1n2/4p1N1/3PP3/2N5/PPP2PPP/R1BQK2R b KQ –

ECO: C41
Opening Name: Philidor Defense: Nimzowitsch, Locock Variation
SAN: 1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. Ng5
UCI: e2e4 e7e5 g1f3 d7d6 d2d4 g8f6 f3g5
FEN: rnbqkb1r/ppp2ppp/3p1n2/4p1N1/3PP3/8/PPP2PPP/RNBQKB1R b KQkq –

ECO: C41
Opening Name: Philidor Defense: Paulsen Attack
SAN: 1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Nxd4 d5 5. exd5
UCI: e2e4 e7e5 g1f3 d7d6 d2d4 e5d4 f3d4 d6d5 e4d5
FEN: rnbqkbnr/ppp2ppp/8/3P4/3N4/8/PPP2PPP/RNBQKB1R b KQkq –

ECO: C41
Opening Name: Philidor Defense: Philidor Countergambit
SAN: 1. e4 e5 2. Nf3 d6 3. d4 f5
UCI: e2e4 e7e5 g1f3 d7d6 d2d4 f7f5
FEN: rnbqkbnr/ppp3pp/3p4/4pp2/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq –

ECO: C41
Opening Name: Philidor Defense: Philidor Countergambit, Berger Variation
SAN: 1. e4 e5 2. Nf3 d6 3. d4 f5 4. dxe5 fxe4 5. Ng5 d5 6. e6 Bc5 7. Nc3
UCI: e2e4 e7e5 g1f3 d7d6 d2d4 f7f5 d4e5 f5e4 f3g5 d6d5 e5e6 f8c5 b1c3
FEN: rnbqk1nr/ppp3pp/4P3/2bp2N1/4p3/2N5/PPP2PPP/R1BQKB1R b KQkq –

ECO: C41
Opening Name: Philidor Defense: Philidor Countergambit, Zukertort Variation
SAN: 1. e4 e5 2. Nf3 d6 3. d4 f5 4. Nc3
UCI: e2e4 e7e5 g1f3 d7d6 d2d4 f7f5 b1c3
FEN: rnbqkbnr/ppp3pp/3p4/4pp2/3PP3/2N2N2/PPP2PPP/R1BQKB1R b KQkq –

ECO: C41
Opening Name: Philidor Defense: Philidor Countergambit, del Rio Attack
SAN: 1. e4 e5 2. Nf3 d6 3. d4 f5 4. dxe5 fxe4 5. Ng5 d5 6. e6
UCI: e2e4 e7e5 g1f3 d7d6 d2d4 f7f5 d4e5 f5e4 f3g5 d6d5 e5e6
FEN: rnbqkbnr/ppp3pp/4P3/3p2N1/4p3/8/PPP2PPP/RNBQKB1R b KQkq –

ECO: C41
Opening Name: Philidor Defense: Philidor Gambit
SAN: 1. e4 e5 2. Nf3 d6 3. d4 Bd7
UCI: e2e4 e7e5 g1f3 d7d6 d2d4 c8d7
FEN: rn1qkbnr/pppb1ppp/3p4/4p3/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq –

ECO: C41
Opening Name: Philidor Defense: Steinitz Variation
SAN: 1. e4 e5 2. Nf3 d6 3. Bc4 Be7 4. c3
UCI: e2e4 e7e5 g1f3 d7d6 f1c4 f8e7 c2c3
FEN: rnbqk1nr/ppp1bppp/3p4/4p3/2B1P3/2P2N2/PP1P1PPP/RNBQK2R b KQkq –

ECO: C42
Opening Name: Petrov’s Defense
SAN: 1. e4 e5 2. Nf3 Nf6
UCI: e2e4 e7e5 g1f3 g8f6
FEN: rnbqkb1r/pppp1ppp/5n2/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq –

ECO: C42
Opening Name: Petrov’s Defense
SAN: 1. e4 e5 2. Nf3 Nf6 3. Nxe5
UCI: e2e4 e7e5 g1f3 g8f6 f3e5
FEN: rnbqkb1r/pppp1ppp/5n2/4N3/4P3/8/PPPP1PPP/RNBQKB1R b KQkq –

ECO: C42
Opening Name: Petrov’s Defense
SAN: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6
UCI: e2e4 e7e5 g1f3 g8f6 f3e5 d7d6
FEN: rnbqkb1r/ppp2ppp/3p1n2/4N3/4P3/8/PPPP1PPP/RNBQKB1R w KQkq –

ECO: C42
Opening Name: Petrov’s Defense
SAN: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3
UCI: e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3
FEN: rnbqkb1r/ppp2ppp/3p1n2/8/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq –

ECO: C42
Opening Name: Petrov’s Defense
SAN: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4
UCI: e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4
FEN: rnbqkb1r/ppp2ppp/3p4/8/4n3/5N2/PPPP1PPP/RNBQKB1R w KQkq –

ECO: C42
Opening Name: Petrov’s Defense: Classical Attack
SAN: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4
UCI: e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4
FEN: rnbqkb1r/ppp2ppp/3p4/8/3Pn3/5N2/PPP2PPP/RNBQKB1R b KQkq –

ECO: C42
Opening Name: Petrov’s Defense: Classical Attack, Berger Variation
SAN: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Be7 7. O-O Nc6 8. Re1 Bg4 9. c3 f5 10. Nbd2
UCI: e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4 d6d5 f1d3 f8e7 e1g1 b8c6 f1e1 c8g4 c2c3 f7f5 b1d2
FEN: r2qk2r/ppp1b1pp/2n5/3p1p2/3Pn1b1/2PB1N2/PP1N1PPP/R1BQR1K1 b kq –

ECO: C42
Opening Name: Petrov’s Defense: Classical Attack, Chigorin Variation
SAN: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Be7 7. O-O Nc6 8. Re1
UCI: e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4 d6d5 f1d3 f8e7 e1g1 b8c6 f1e1
FEN: r1bqk2r/ppp1bppp/2n5/3p4/3Pn3/3B1N2/PPP2PPP/RNBQR1K1 b kq –

ECO: C42
Opening Name: Petrov’s Defense: Classical Attack, Chigorin Variation, Browne Attack
SAN: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Nc6 7. O-O Be7 8. c4 Nb4 9. cxd5
UCI: e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4 d6d5 f1d3 b8c6 e1g1 f8e7 c2c4 c6b4 c4d5
FEN: r1bqk2r/ppp1bppp/8/3P4/1n1Pn3/3B1N2/PP3PPP/RNBQ1RK1 b kq –

ECO: C42
Opening Name: Petrov’s Defense: Classical Attack, Chigorin Variation, Main Line
SAN: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Nc6 7. O-O Be7 8. c4 Nb4 9. Be2
UCI: e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4 d6d5 f1d3 b8c6 e1g1 f8e7 c2c4 c6b4 d3e2
FEN: r1bqk2r/ppp1bppp/8/3p4/1nPPn3/5N2/PP2BPPP/RNBQ1RK1 b kq –

ECO: C42
Opening Name: Petrov’s Defense: Classical Attack, Closed Variation
SAN: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 Nf6
UCI: e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4 e4f6
FEN: rnbqkb1r/ppp2ppp/3p1n2/8/3P4/5N2/PPP2PPP/RNBQKB1R w KQkq –

ECO: C42
Opening Name: Petrov’s Defense: Classical Attack, Jaenisch Variation
SAN: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Nc6 7. O-O Be7 8. c4
UCI: e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4 d6d5 f1d3 b8c6 e1g1 f8e7 c2c4
FEN: r1bqk2r/ppp1bppp/2n5/3p4/2PPn3/3B1N2/PP3PPP/RNBQ1RK1 b kq –

ECO: C42
Opening Name: Petrov’s Defense: Classical Attack, Krause Variation
SAN: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Nc6 7. O-O Be7 8. Re1 Bg4 9. c3 f5 10. c4
UCI: e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4 d6d5 f1d3 b8c6 e1g1 f8e7 f1e1 c8g4 c2c3 f7f5 c3c4
FEN: r2qk2r/ppp1b1pp/2n5/3p1p2/2PPn1b1/3B1N2/PP3PPP/RNBQR1K1 b kq –

ECO: C42
Opening Name: Petrov’s Defense: Classical Attack, Marshall Trap
SAN: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Bd6 7. O-O O-O 8. c4 Bg4 9. cxd5 f5 10. Re1 Bxh2+
UCI: e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4 d6d5 f1d3 f8d6 e1g1 e8g8 c2c4 c8g4 c4d5 f7f5 f1e1 d6h2
FEN: rn1q1rk1/ppp3pp/8/3P1p2/3Pn1b1/3B1N2/PP3PPb/RNBQR1K1 w – –

ECO: C42
Opening Name: Petrov’s Defense: Classical Attack, Marshall Variation
SAN: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Bd6
UCI: e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4 d6d5 f1d3 f8d6
FEN: rnbqk2r/ppp2ppp/3b4/3p4/3Pn3/3B1N2/PPP2PPP/RNBQK2R w KQkq –

ECO: C42
Opening Name: Petrov’s Defense: Classical Attack, Marshall Variation, Chinese Gambit
SAN: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Bd6 7. O-O O-O 8. c4 c6 9. Re1 Bg4
UCI: e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4 d6d5 f1d3 f8d6 e1g1 e8g8 c2c4 c7c6 f1e1 c8g4
FEN: rn1q1rk1/pp3ppp/2pb4/3p4/2PPn1b1/3B1N2/PP3PPP/RNBQR1K1 w – –

ECO: C42
Opening Name: Petrov’s Defense: Classical Attack, Maróczy Variation
SAN: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Be7 7. O-O Nc6 8. Re1 Bg4 9. c3 f5 10. c4 Bh4
UCI: e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4 d6d5 f1d3 f8e7 e1g1 b8c6 f1e1 c8g4 c2c3 f7f5 c3c4 e7h4
FEN: r2qk2r/ppp3pp/2n5/3p1p2/2PPn1bb/3B1N2/PP3PPP/RNBQR1K1 w kq –

ECO: C42
Opening Name: Petrov’s Defense: Classical Attack, Mason Variation
SAN: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Be7 7. O-O O-O
UCI: e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4 d6d5 f1d3 f8e7 e1g1 e8g8
FEN: rnbq1rk1/ppp1bppp/8/3p4/3Pn3/3B1N2/PPP2PPP/RNBQ1RK1 w – –

ECO: C42
Opening Name: Petrov’s Defense: Classical Attack, Mason-Showalter Variation
SAN: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Nc6
UCI: e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4 d6d5 f1d3 b8c6
FEN: r1bqkb1r/ppp2ppp/2n5/3p4/3Pn3/3B1N2/PPP2PPP/RNBQK2R w KQkq –

ECO: C42
Opening Name: Petrov’s Defense: Classical Attack, Staunton Variation
SAN: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Bd6 7. O-O O-O 8. c4 c6
UCI: e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4 d6d5 f1d3 f8d6 e1g1 e8g8 c2c4 c7c6
FEN: rnbq1rk1/pp3ppp/2pb4/3p4/2PPn3/3B1N2/PP3PPP/RNBQ1RK1 w – –

ECO: C42
Opening Name: Petrov’s Defense: Classical Attack, Tarrasch Variation
SAN: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Bd6 7. O-O O-O 8. c4 Bg4
UCI: e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4 d6d5 f1d3 f8d6 e1g1 e8g8 c2c4 c8g4
FEN: rn1q1rk1/ppp2ppp/3b4/3p4/2PPn1b1/3B1N2/PP3PPP/RNBQ1RK1 w – –

ECO: C42
Opening Name: Petrov’s Defense: Cochrane Gambit
SAN: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nxf7
UCI: e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f7
FEN: rnbqkb1r/ppp2Npp/3p1n2/8/4P3/8/PPPP1PPP/RNBQKB1R b KQkq –

ECO: C42
Opening Name: Petrov’s Defense: Cochrane Gambit, Bishop Check Line
SAN: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nxf7 Kxf7 5. Bc4+
UCI: e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f7 e8f7 f1c4
FEN: rnbq1b1r/ppp2kpp/3p1n2/8/2B1P3/8/PPPP1PPP/RNBQK2R b KQ –

ECO: C42
Opening Name: Petrov’s Defense: Cochrane Gambit, Center Variation
SAN: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nxf7 Kxf7 5. d4
UCI: e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f7 e8f7 d2d4
FEN: rnbq1b1r/ppp2kpp/3p1n2/8/3PP3/8/PPP2PPP/RNBQKB1R b KQ –

ECO: C42
Opening Name: Petrov’s Defense: Cozio Attack
SAN: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Qe2
UCI: e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d1e2
FEN: rnbqkb1r/ppp2ppp/3p4/8/4n3/5N2/PPPPQPPP/RNB1KB1R b KQkq –

ECO: C42
Opening Name: Petrov’s Defense: Damiano Variation
SAN: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 Nxe4
UCI: e2e4 e7e5 g1f3 g8f6 f3e5 f6e4
FEN: rnbqkb1r/pppp1ppp/8/4N3/4n3/8/PPPP1PPP/RNBQKB1R w KQkq –

ECO: C42
Opening Name: Petrov’s Defense: Damiano Variation, Kholmov Gambit
SAN: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 Nxe4 4. Qe2 Qe7
UCI: e2e4 e7e5 g1f3 g8f6 f3e5 f6e4 d1e2 d8e7
FEN: rnb1kb1r/ppppqppp/8/4N3/4n3/8/PPPPQPPP/RNB1KB1R w KQkq –

ECO: C42
Opening Name: Petrov’s Defense: French Attack
SAN: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d3
UCI: e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d3
FEN: rnbqkb1r/ppp2ppp/3p4/8/4n3/3P1N2/PPP2PPP/RNBQKB1R b KQkq –

ECO: C42
Opening Name: Petrov’s Defense: Italian Variation
SAN: 1. e4 e5 2. Nf3 Nf6 3. Bc4
UCI: e2e4 e7e5 g1f3 g8f6 f1c4
FEN: rnbqkb1r/pppp1ppp/5n2/4p3/2B1P3/5N2/PPPP1PPP/RNBQK2R b KQkq –

ECO: C42
Opening Name: Petrov’s Defense: Karklins-Martinovsky Variation
SAN: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nd3
UCI: e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5d3
FEN: rnbqkb1r/ppp2ppp/3p1n2/8/4P3/3N4/PPPP1PPP/RNBQKB1R b KQkq –

ECO: C42
Opening Name: Petrov’s Defense: Kaufmann Attack
SAN: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. c4
UCI: e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 c2c4
FEN: rnbqkb1r/ppp2ppp/3p4/8/2P1n3/5N2/PP1P1PPP/RNBQKB1R b KQkq –

ECO: C42
Opening Name: Petrov’s Defense: Millennium Attack
SAN: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Bd3
UCI: e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 f1d3
FEN: rnbqkb1r/ppp2ppp/3p4/8/4n3/3B1N2/PPPP1PPP/RNBQK2R b KQkq –

ECO: C42
Opening Name: Petrov’s Defense: Moody Gambit
SAN: 1. e4 e5 2. Nf3 Nf6 3. Qe2 Nc6 4. d4
UCI: e2e4 e7e5 g1f3 g8f6 d1e2 b8c6 d2d4
FEN: r1bqkb1r/pppp1ppp/2n2n2/4p3/3PP3/5N2/PPP1QPPP/RNB1KB1R b KQkq –

ECO: C42
Opening Name: Petrov’s Defense: Nimzowitsch Attack
SAN: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Nc3
UCI: e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 b1c3
FEN: rnbqkb1r/ppp2ppp/3p4/8/4n3/2N2N2/PPPP1PPP/R1BQKB1R b KQkq –

ECO: C42
Opening Name: Petrov’s Defense: Paulsen Attack
SAN: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nc4
UCI: e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5c4
FEN: rnbqkb1r/ppp2ppp/3p1n2/8/2N1P3/8/PPPP1PPP/RNBQKB1R b KQkq –

ECO: C42
Opening Name: Petrov’s Defense: Stafford Gambit
SAN: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 Nc6
UCI: e2e4 e7e5 g1f3 g8f6 f3e5 b8c6
FEN: r1bqkb1r/pppp1ppp/2n2n2/4N3/4P3/8/PPPP1PPP/RNBQKB1R w KQkq –

ECO: C42
Opening Name: Petrov’s Defense: Stafford Gambit
SAN: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 Nc6 4. Nxc6 dxc6
UCI: e2e4 e7e5 g1f3 g8f6 f3e5 b8c6 e5c6 d7c6
FEN: r1bqkb1r/ppp2ppp/2p2n2/8/4P3/8/PPPP1PPP/RNBQKB1R w KQkq –

ECO: C42
Opening Name: Petrov’s Defense: Three Knights Game
SAN: 1. e4 e5 2. Nf3 Nf6 3. Nc3
UCI: e2e4 e7e5 g1f3 g8f6 b1c3
FEN: rnbqkb1r/pppp1ppp/5n2/4p3/4P3/2N2N2/PPPP1PPP/R1BQKB1R b KQkq –

ECO: C43
Opening Name: Bishop’s Opening: Urusov Gambit
SAN: 1. e4 e5 2. Bc4 Nf6 3. d4 exd4 4. Nf3
UCI: e2e4 e7e5 f1c4 g8f6 d2d4 e5d4 g1f3
FEN: rnbqkb1r/pppp1ppp/5n2/8/2BpP3/5N2/PPP2PPP/RNBQK2R b KQkq –

ECO: C43
Opening Name: Bishop’s Opening: Urusov Gambit, Keidansky Gambit
SAN: 1. e4 e5 2. Bc4 Nf6 3. d4 exd4 4. Nf3 Nxe4 5. Qxd4
UCI: e2e4 e7e5 f1c4 g8f6 d2d4 e5d4 g1f3 f6e4 d1d4
FEN: rnbqkb1r/pppp1ppp/8/8/2BQn3/5N2/PPP2PPP/RNB1K2R b KQkq –

ECO: C43
Opening Name: Petrov’s Defense: Modern Attack
SAN: 1. e4 e5 2. Nf3 Nf6 3. d4
UCI: e2e4 e7e5 g1f3 g8f6 d2d4
FEN: rnbqkb1r/pppp1ppp/5n2/4p3/3PP3/5N2/PPP2PPP/RNBQKB1R b KQkq –

ECO: C43
Opening Name: Petrov’s Defense: Modern Attack
SAN: 1. e4 e5 2. Nf3 Nf6 3. d4 exd4
UCI: e2e4 e7e5 g1f3 g8f6 d2d4 e5d4
FEN: rnbqkb1r/pppp1ppp/5n2/8/3pP3/5N2/PPP2PPP/RNBQKB1R w KQkq –

ECO: C43
Opening Name: Petrov’s Defense: Modern Attack, Bardeleben Variation
SAN: 1. e4 e5 2. Nf3 Nf6 3. d4 exd4 4. e5 Ne4 5. Qe2 Nc5 6. Nxd4 Nc6
UCI: e2e4 e7e5 g1f3 g8f6 d2d4 e5d4 e4e5 f6e4 d1e2 e4c5 f3d4 b8c6
FEN: r1bqkb1r/pppp1ppp/2n5/2n1P3/3N4/8/PPP1QPPP/RNB1KB1R w KQkq –

ECO: C43
Opening Name: Petrov’s Defense: Modern Attack, Center Attack
SAN: 1. e4 e5 2. Nf3 Nf6 3. d4 exd4 4. e5 Ne4 5. Qxd4
UCI: e2e4 e7e5 g1f3 g8f6 d2d4 e5d4 e4e5 f6e4 d1d4
FEN: rnbqkb1r/pppp1ppp/8/4P3/3Qn3/5N2/PPP2PPP/RNB1KB1R b KQkq –

ECO: C43
Opening Name: Petrov’s Defense: Modern Attack, Center Variation
SAN: 1. e4 e5 2. Nf3 Nf6 3. d4 Nxe4 4. Bd3
UCI: e2e4 e7e5 g1f3 g8f6 d2d4 f6e4 f1d3
FEN: rnbqkb1r/pppp1ppp/8/4p3/3Pn3/3B1N2/PPP2PPP/RNBQK2R b KQkq –

ECO: C43
Opening Name: Petrov’s Defense: Modern Attack, Murrey Variation
SAN: 1. e4 e5 2. Nf3 Nf6 3. d4 Nxe4 4. Bd3 Nc6
UCI: e2e4 e7e5 g1f3 g8f6 d2d4 f6e4 f1d3 b8c6
FEN: r1bqkb1r/pppp1ppp/2n5/4p3/3Pn3/3B1N2/PPP2PPP/RNBQK2R w KQkq –

ECO: C43
Opening Name: Petrov’s Defense: Modern Attack, Steinitz Variation
SAN: 1. e4 e5 2. Nf3 Nf6 3. d4 exd4 4. e5 Ne4 5. Qe2
UCI: e2e4 e7e5 g1f3 g8f6 d2d4 e5d4 e4e5 f6e4 d1e2
FEN: rnbqkb1r/pppp1ppp/8/4P3/3pn3/5N2/PPP1QPPP/RNB1KB1R b KQkq –

ECO: C43
Opening Name: Petrov’s Defense: Modern Attack, Symmetrical Variation
SAN: 1. e4 e5 2. Nf3 Nf6 3. d4 d5
UCI: e2e4 e7e5 g1f3 g8f6 d2d4 d7d5
FEN: rnbqkb1r/ppp2ppp/5n2/3pp3/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq –

ECO: C43
Opening Name: Petrov’s Defense: Modern Attack, Tal Gambit
SAN: 1. e4 e5 2. Nf3 Nf6 3. d4 exd4 4. e5 Ne4 5. Bb5
UCI: e2e4 e7e5 g1f3 g8f6 d2d4 e5d4 e4e5 f6e4 f1b5
FEN: rnbqkb1r/pppp1ppp/8/1B2P3/3pn3/5N2/PPP2PPP/RNBQK2R b KQkq –

ECO: C43
Opening Name: Petrov’s Defense: Modern Attack, Trifunovic Variation
SAN: 1. e4 e5 2. Nf3 Nf6 3. d4 Nxe4 4. Bd3 d5 5. Nxe5 Bd6 6. O-O O-O 7. c4 Bxe5
UCI: e2e4 e7e5 g1f3 g8f6 d2d4 f6e4 f1d3 d7d5 f3e5 f8d6 e1g1 e8g8 c2c4 d6e5
FEN: rnbq1rk1/ppp2ppp/8/3pb3/2PPn3/3B4/PP3PPP/RNBQ1RK1 w – –

ECO: C44
Opening Name: Dresden Opening: The Goblin
SAN: 1. e4 e5 2. Nf3 Nc6 3. c4 Nf6 4. Nxe5
UCI: e2e4 e7e5 g1f3 b8c6 c2c4 g8f6 f3e5
FEN: r1bqkb1r/pppp1ppp/2n2n2/4N3/2P1P3/8/PP1P1PPP/RNBQKB1R b KQkq –

ECO: C44
Opening Name: Irish Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nxe5
UCI: e2e4 e7e5 g1f3 b8c6 f3e5
FEN: r1bqkbnr/pppp1ppp/2n5/4N3/4P3/8/PPPP1PPP/RNBQKB1R b KQkq –

ECO: C44
Opening Name: King’s Knight Opening: Konstantinopolsky
SAN: 1. e4 e5 2. Nf3 Nc6 3. g3
UCI: e2e4 e7e5 g1f3 b8c6 g2g3
FEN: r1bqkbnr/pppp1ppp/2n5/4p3/4P3/5NP1/PPPP1P1P/RNBQKB1R b KQkq –

ECO: C44
Opening Name: King’s Knight Opening: Normal Variation
SAN: 1. e4 e5 2. Nf3 Nc6
UCI: e2e4 e7e5 g1f3 b8c6
FEN: r1bqkbnr/pppp1ppp/2n5/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq –

ECO: C44
Opening Name: King’s Pawn Game: Dresden Opening
SAN: 1. e4 e5 2. Nf3 Nc6 3. c4
UCI: e2e4 e7e5 g1f3 b8c6 c2c4
FEN: r1bqkbnr/pppp1ppp/2n5/4p3/2P1P3/5N2/PP1P1PPP/RNBQKB1R b KQkq –

ECO: C44
Opening Name: King’s Pawn Game: Pachman Wing Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. b4
UCI: e2e4 e7e5 g1f3 b8c6 b2b4
FEN: r1bqkbnr/pppp1ppp/2n5/4p3/1P2P3/5N2/P1PP1PPP/RNBQKB1R b KQkq –

ECO: C44
Opening Name: King’s Pawn Game: Schulze-Müller Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nxe5 Nxe5 4. d4
UCI: e2e4 e7e5 g1f3 b8c6 f3e5 c6e5 d2d4
FEN: r1bqkbnr/pppp1ppp/8/4n3/3PP3/8/PPP2PPP/RNBQKB1R b KQkq –

ECO: C44
Opening Name: King’s Pawn Game: Tayler Opening
SAN: 1. e4 e5 2. Nf3 Nc6 3. Be2
UCI: e2e4 e7e5 g1f3 b8c6 f1e2
FEN: r1bqkbnr/pppp1ppp/2n5/4p3/4P3/5N2/PPPPBPPP/RNBQK2R b KQkq –

ECO: C44
Opening Name: King’s Pawn Game: Tayler Opening
SAN: 1. e4 e5 2. Nf3 Nc6 3. Be2 Nf6 4. d4
UCI: e2e4 e7e5 g1f3 b8c6 f1e2 g8f6 d2d4
FEN: r1bqkb1r/pppp1ppp/2n2n2/4p3/3PP3/5N2/PPP1BPPP/RNBQK2R b KQkq –

ECO: C44
Opening Name: King’s Pawn Game: Tayler Opening, Basman Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Be2 Nf6 4. d4 exd4 5. e5
UCI: e2e4 e7e5 g1f3 b8c6 f1e2 g8f6 d2d4 e5d4 e4e5
FEN: r1bqkb1r/pppp1ppp/2n2n2/4P3/3p4/5N2/PPP1BPPP/RNBQK2R b KQkq –

ECO: C44
Opening Name: King’s Pawn Game: Tayler Opening, Inverted Hanham
SAN: 1. e4 e5 2. Nf3 Nc6 3. Be2 Nf6 4. d3 d5 5. Nbd2
UCI: e2e4 e7e5 g1f3 b8c6 f1e2 g8f6 d2d3 d7d5 b1d2
FEN: r1bqkb1r/ppp2ppp/2n2n2/3pp3/4P3/3P1N2/PPPNBPPP/R1BQK2R b KQkq –

ECO: C44
Opening Name: Latvian Gambit: Clam Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. d3 f5 4. exf5
UCI: e2e4 e7e5 g1f3 b8c6 d2d3 f7f5 e4f5
FEN: r1bqkbnr/pppp2pp/2n5/4pP2/8/3P1N2/PPP2PPP/RNBQKB1R b KQkq –

ECO: C44
Opening Name: Ponziani Opening
SAN: 1. e4 e5 2. Nf3 Nc6 3. c3
UCI: e2e4 e7e5 g1f3 b8c6 c2c3
FEN: r1bqkbnr/pppp1ppp/2n5/4p3/4P3/2P2N2/PP1P1PPP/RNBQKB1R b KQkq –

ECO: C44
Opening Name: Ponziani Opening: Caro Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. c3 d5 4. Qa4 Bd7
UCI: e2e4 e7e5 g1f3 b8c6 c2c3 d7d5 d1a4 c8d7
FEN: r2qkbnr/pppb1ppp/2n5/3pp3/Q3P3/2P2N2/PP1P1PPP/RNB1KB1R w KQkq –

ECO: C44
Opening Name: Ponziani Opening: Jaenisch Counterattack
SAN: 1. e4 e5 2. Nf3 Nc6 3. c3 Nf6
UCI: e2e4 e7e5 g1f3 b8c6 c2c3 g8f6
FEN: r1bqkb1r/pppp1ppp/2n2n2/4p3/4P3/2P2N2/PP1P1PPP/RNBQKB1R w KQkq –

ECO: C44
Opening Name: Ponziani Opening: Jaenisch Counterattack
SAN: 1. e4 e5 2. Nf3 Nc6 3. c3 Nf6 4. d3
UCI: e2e4 e7e5 g1f3 b8c6 c2c3 g8f6 d2d3
FEN: r1bqkb1r/pppp1ppp/2n2n2/4p3/4P3/2PP1N2/PP3PPP/RNBQKB1R b KQkq –

ECO: C44
Opening Name: Ponziani Opening: Jaenisch Counterattack
SAN: 1. e4 e5 2. Nf3 Nc6 3. c3 Nf6 4. d3 d5
UCI: e2e4 e7e5 g1f3 b8c6 c2c3 g8f6 d2d3 d7d5
FEN: r1bqkb1r/ppp2ppp/2n2n2/3pp3/4P3/2PP1N2/PP3PPP/RNBQKB1R w KQkq –

ECO: C44
Opening Name: Ponziani Opening: Jaenisch Counterattack
SAN: 1. e4 e5 2. Nf3 Nc6 3. c3 Nf6 4. d3 d5 5. Nbd2
UCI: e2e4 e7e5 g1f3 b8c6 c2c3 g8f6 d2d3 d7d5 b1d2
FEN: r1bqkb1r/ppp2ppp/2n2n2/3pp3/4P3/2PP1N2/PP1N1PPP/R1BQKB1R b KQkq –

ECO: C44
Opening Name: Ponziani Opening: Leonhardt Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. c3 d5 4. Qa4 Nf6
UCI: e2e4 e7e5 g1f3 b8c6 c2c3 d7d5 d1a4 g8f6
FEN: r1bqkb1r/ppp2ppp/2n2n2/3pp3/Q3P3/2P2N2/PP1P1PPP/RNB1KB1R w KQkq –

ECO: C44
Opening Name: Ponziani Opening: Neumann Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. c3 Nf6 4. Bc4
UCI: e2e4 e7e5 g1f3 b8c6 c2c3 g8f6 f1c4
FEN: r1bqkb1r/pppp1ppp/2n2n2/4p3/2B1P3/2P2N2/PP1P1PPP/RNBQK2R b KQkq –

ECO: C44
Opening Name: Ponziani Opening: Ponziani Countergambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. c3 f5
UCI: e2e4 e7e5 g1f3 b8c6 c2c3 f7f5
FEN: r1bqkbnr/pppp2pp/2n5/4pp2/4P3/2P2N2/PP1P1PPP/RNBQKB1R w KQkq –

ECO: C44
Opening Name: Ponziani Opening: Ponziani Countergambit, Schmidt Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. c3 f5 4. d4 d6 5. d5
UCI: e2e4 e7e5 g1f3 b8c6 c2c3 f7f5 d2d4 d7d6 d4d5
FEN: r1bqkbnr/ppp3pp/2np4/3Ppp2/4P3/2P2N2/PP3PPP/RNBQKB1R b KQkq –

ECO: C44
Opening Name: Ponziani Opening: Romanishin Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. c3 Be7
UCI: e2e4 e7e5 g1f3 b8c6 c2c3 f8e7
FEN: r1bqk1nr/ppppbppp/2n5/4p3/4P3/2P2N2/PP1P1PPP/RNBQKB1R w KQkq –

ECO: C44
Opening Name: Ponziani Opening: Réti Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. c3 Nge7
UCI: e2e4 e7e5 g1f3 b8c6 c2c3 g8e7
FEN: r1bqkb1r/ppppnppp/2n5/4p3/4P3/2P2N2/PP1P1PPP/RNBQKB1R w KQkq –

ECO: C44
Opening Name: Ponziani Opening: Spanish Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. c3 d5 4. Bb5
UCI: e2e4 e7e5 g1f3 b8c6 c2c3 d7d5 f1b5
FEN: r1bqkbnr/ppp2ppp/2n5/1B1pp3/4P3/2P2N2/PP1P1PPP/RNBQK2R b KQkq –

ECO: C44
Opening Name: Ponziani Opening: Spanish Variation, Harrwitz Attack, Nikitin Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. c3 d5 4. Bb5 dxe4 5. Nxe5 Qd5 6. Qa4
UCI: e2e4 e7e5 g1f3 b8c6 c2c3 d7d5 f1b5 d5e4 f3e5 d8d5 d1a4
FEN: r1b1kbnr/ppp2ppp/2n5/1B1qN3/Q3p3/2P5/PP1P1PPP/RNB1K2R b KQkq –

ECO: C44
Opening Name: Ponziani Opening: Steinitz Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. c3 d5 4. Qa4 f6
UCI: e2e4 e7e5 g1f3 b8c6 c2c3 d7d5 d1a4 f7f6
FEN: r1bqkbnr/ppp3pp/2n2p2/3pp3/Q3P3/2P2N2/PP1P1PPP/RNB1KB1R w KQkq –

ECO: C44
Opening Name: Ponziani Opening: Vukovic Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. c3 Nf6 4. d4 Nxe4 5. d5 Bc5
UCI: e2e4 e7e5 g1f3 b8c6 c2c3 g8f6 d2d4 f6e4 d4d5 f8c5
FEN: r1bqk2r/pppp1ppp/2n5/2bPp3/4n3/2P2N2/PP3PPP/RNBQKB1R w KQkq –

ECO: C44
Opening Name: Scotch Game
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4
UCI: e2e4 e7e5 g1f3 b8c6 d2d4
FEN: r1bqkbnr/pppp1ppp/2n5/4p3/3PP3/5N2/PPP2PPP/RNBQKB1R b KQkq –

ECO: C44
Opening Name: Scotch Game
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4
FEN: r1bqkbnr/pppp1ppp/2n5/8/3pP3/5N2/PPP2PPP/RNBQKB1R w KQkq –

ECO: C44
Opening Name: Scotch Game: Benima Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Be7 4. d4 exd4
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8e7 d2d4 e5d4
FEN: r1bqk1nr/ppppbppp/2n5/8/2BpP3/5N2/PPP2PPP/RNBQK2R w KQkq –

ECO: C44
Opening Name: Scotch Game: Cochrane Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Bb4+ 5. c3 dxc3 6. bxc3 Ba5 7. e5
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f1c4 f8b4 c2c3 d4c3 b2c3 b4a5 e4e5
FEN: r1bqk1nr/pppp1ppp/2n5/b3P3/2B5/2P2N2/P4PPP/RNBQK2R b KQkq –

ECO: C44
Opening Name: Scotch Game: Cochrane-Shumov Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Bc5 5. Ng5 Nh6 6. Nxf7 Nxf7 7. Bxf7+ Kxf7 8. Qh5+ g6 9. Qxc5 d5
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f1c4 f8c5 f3g5 g8h6 g5f7 h6f7 c4f7 e8f7 d1h5 g7g6 h5c5 d7d5
FEN: r1bq3r/ppp2k1p/2n3p1/2Qp4/3pP3/8/PPP2PPP/RNB1K2R w KQ –

ECO: C44
Opening Name: Scotch Game: Göring Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. c3
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 c2c3
FEN: r1bqkbnr/pppp1ppp/2n5/8/3pP3/2P2N2/PP3PPP/RNBQKB1R b KQkq –

ECO: C44
Opening Name: Scotch Game: Göring Gambit, Bardeleben Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. c3 dxc3 5. Bc4 Nf6 6. Nxc3 Bb4
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 c2c3 d4c3 f1c4 g8f6 b1c3 f8b4
FEN: r1bqk2r/pppp1ppp/2n2n2/8/1bB1P3/2N2N2/PP3PPP/R1BQK2R w KQkq –

ECO: C44
Opening Name: Scotch Game: Göring Gambit, Double Pawn Sacrifice
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. c3 dxc3 5. Bc4
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 c2c3 d4c3 f1c4
FEN: r1bqkbnr/pppp1ppp/2n5/8/2B1P3/2p2N2/PP3PPP/RNBQK2R b KQkq –

ECO: C44
Opening Name: Scotch Game: Göring Gambit, Main Line
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. c3 dxc3 5. Nxc3 Bb4
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 c2c3 d4c3 b1c3 f8b4
FEN: r1bqk1nr/pppp1ppp/2n5/8/1b2P3/2N2N2/PP3PPP/R1BQKB1R w KQkq –

ECO: C44
Opening Name: Scotch Game: Hanneken Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Bb4+ 5. c3 dxc3 6. O-O cxb2 7. Bxb2 Nf6 8. Ng5 O-O 9. e5 Nxe5
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f1c4 f8b4 c2c3 d4c3 e1g1 c3b2 c1b2 g8f6 f3g5 e8g8 e4e5 c6e5
FEN: r1bq1rk1/pppp1ppp/5n2/4n1N1/1bB5/8/PB3PPP/RN1Q1RK1 w – –

ECO: C44
Opening Name: Scotch Game: Haxo Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Bc5
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f1c4 f8c5
FEN: r1bqk1nr/pppp1ppp/2n5/2b5/2BpP3/5N2/PPP2PPP/RNBQK2R w KQkq –

ECO: C44
Opening Name: Scotch Game: Lolli Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 Nxd4
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 c6d4
FEN: r1bqkbnr/pppp1ppp/8/4p3/3nP3/5N2/PPP2PPP/RNBQKB1R w KQkq –

ECO: C44
Opening Name: Scotch Game: Lolli Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 Nxd4 4. Nxd4 exd4 5. Qxd4
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 c6d4 f3d4 e5d4 d1d4
FEN: r1bqkbnr/pppp1ppp/8/8/3QP3/8/PPP2PPP/RNB1KB1R b KQkq –

ECO: C44
Opening Name: Scotch Game: Napoleon Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 Nxd4 4. Nxd4 exd4 5. Bc4
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 c6d4 f3d4 e5d4 f1c4
FEN: r1bqkbnr/pppp1ppp/8/8/2BpP3/8/PPP2PPP/RNBQK2R b KQkq –

ECO: C44
Opening Name: Scotch Game: Relfsson Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bb5
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f1b5
FEN: r1bqkbnr/pppp1ppp/2n5/1B6/3pP3/5N2/PPP2PPP/RNBQK2R b KQkq –

ECO: C44
Opening Name: Scotch Game: Scotch Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f1c4
FEN: r1bqkbnr/pppp1ppp/2n5/8/2BpP3/5N2/PPP2PPP/RNBQK2R b KQkq –

ECO: C44
Opening Name: Scotch Game: Scotch Gambit, Advance Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Nf6 5. e5
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f1c4 g8f6 e4e5
FEN: r1bqkb1r/pppp1ppp/2n2n2/4P3/2Bp4/5N2/PPP2PPP/RNBQK2R b KQkq –

ECO: C44
Opening Name: Scotch Game: Scotch Gambit, Cochrane-Anderssen Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Bc5 5. O-O d6 6. c3 Bg4
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f1c4 f8c5 e1g1 d7d6 c2c3 c8g4
FEN: r2qk1nr/ppp2ppp/2np4/2b5/2BpP1b1/2P2N2/PP3PPP/RNBQ1RK1 w kq –

ECO: C44
Opening Name: Scotch Game: Scotch Gambit, Dubois Réti Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 d2d4 e5d4
FEN: r1bqkb1r/pppp1ppp/2n2n2/8/2BpP3/5N2/PPP2PPP/RNBQK2R w KQkq –

ECO: C44
Opening Name: Scotch Game: Scotch Gambit, Göring Gambit Declined
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. c3 d5
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 c2c3 d7d5
FEN: r1bqkbnr/ppp2ppp/2n5/3p4/3pP3/2P2N2/PP3PPP/RNBQKB1R w KQkq –

ECO: C44
Opening Name: Scotch Game: Scotch Gambit, Kingside Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. e5 Ng4
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 d2d4 e5d4 e4e5 f6g4
FEN: r1bqkb1r/pppp1ppp/2n5/4P3/2Bp2n1/5N2/PPP2PPP/RNBQK2R w KQkq –

ECO: C44
Opening Name: Scotch Game: Scotch Gambit, London Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Bb4+
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f1c4 f8b4
FEN: r1bqk1nr/pppp1ppp/2n5/8/1bBpP3/5N2/PPP2PPP/RNBQK2R w KQkq –

ECO: C44
Opening Name: Scotch Game: Scotch Gambit, Sarratt Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Bc5 5. Ng5
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f1c4 f8c5 f3g5
FEN: r1bqk1nr/pppp1ppp/2n5/2b3N1/2BpP3/8/PPP2PPP/RNBQK2R b KQkq –

ECO: C44
Opening Name: Scotch Game: Sea-Cadet Mate
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. c3 dxc3 5. Nxc3 d6 6. Bc4 Bg4 7. O-O Ne5 8. Nxe5 Bxd1 9. Bxf7+ Ke7 10. Nd5#
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 c2c3 d4c3 b1c3 d7d6 f1c4 c8g4 e1g1 c6e5 f3e5 g4d1 c4f7 e8e7 c3d5
FEN: r2q1bnr/ppp1kBpp/3p4/3NN3/4P3/8/PP3PPP/R1Bb1RK1 b – –

ECO: C44
Opening Name: Scotch Game: Vitzthum Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Bc5 5. Ng5 Nh6 6. Qh5
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f1c4 f8c5 f3g5 g8h6 d1h5
FEN: r1bqk2r/pppp1ppp/2n4n/2b3NQ/2BpP3/8/PPP2PPP/RNB1K2R b KQkq –

ECO: C45
Opening Name: Scotch Game
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4
FEN: r1bqkbnr/pppp1ppp/2n5/8/3NP3/8/PPP2PPP/RNBQKB1R b KQkq –

ECO: C45
Opening Name: Scotch Game
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Qh4 5. Nb5 Bb4+ 6. Bd2
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 d8h4 d4b5 f8b4 c1d2
FEN: r1b1k1nr/pppp1ppp/2n5/1N6/1b2P2q/8/PPPB1PPP/RN1QKB1R b KQkq –

ECO: C45
Opening Name: Scotch Game: Alekhine Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6 5. e5
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 g8f6 e4e5
FEN: r1bqkb1r/pppp1ppp/2n2n2/4P3/3N4/8/PPP2PPP/RNBQKB1R b KQkq –

ECO: C45
Opening Name: Scotch Game: Blumenfeld Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. Nb5
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 f8c5 c1e3 d8f6 d4b5
FEN: r1b1k1nr/pppp1ppp/2n2q2/1Nb5/4P3/4B3/PPP2PPP/RN1QKB1R b KQkq –

ECO: C45
Opening Name: Scotch Game: Braune Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Qh4 5. Be3
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 d8h4 c1e3
FEN: r1b1kbnr/pppp1ppp/2n5/8/3NP2q/4B3/PPP2PPP/RN1QKB1R b KQkq –

ECO: C45
Opening Name: Scotch Game: Classical Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 f8c5
FEN: r1bqk1nr/pppp1ppp/2n5/2b5/3NP3/8/PPP2PPP/RNBQKB1R w KQkq –

ECO: C45
Opening Name: Scotch Game: Classical Variation, Blackburne Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. c3 Nge7 7. Qd2
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 f8c5 c1e3 d8f6 c2c3 g8e7 d1d2
FEN: r1b1k2r/ppppnppp/2n2q2/2b5/3NP3/2P1B3/PP1Q1PPP/RN2KB1R b KQkq –

ECO: C45
Opening Name: Scotch Game: Classical Variation, Intermezzo Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Nxc6 Qf6
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 f8c5 d4c6 d8f6
FEN: r1b1k1nr/pppp1ppp/2N2q2/2b5/4P3/8/PPP2PPP/RNBQKB1R w KQkq –

ECO: C45
Opening Name: Scotch Game: Classical Variation, Millennium Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. c3 Qg6
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 f8c5 c1e3 d8f6 c2c3 f6g6
FEN: r1b1k1nr/pppp1ppp/2n3q1/2b5/3NP3/2P1B3/PP3PPP/RN1QKB1R w KQkq –

ECO: C45
Opening Name: Scotch Game: Fraser Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Qh4 5. Nf3
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 d8h4 d4f3
FEN: r1b1kbnr/pppp1ppp/2n5/8/4P2q/5N2/PPP2PPP/RNBQKB1R b KQkq –

ECO: C45
Opening Name: Scotch Game: Ghulam-Kassim Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nxd4 5. Qxd4 d6 6. Bd3
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 c6d4 d1d4 d7d6 f1d3
FEN: r1bqkbnr/ppp2ppp/3p4/8/3QP3/3B4/PPP2PPP/RNB1K2R b KQkq –

ECO: C45
Opening Name: Scotch Game: Gottschall Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. c3 Nge7 7. Qd2 d5 8. Nb5 Bxe3 9. Qxe3 O-O 10. Nxc7 Rb8 11. Nxd5 Nxd5 12. exd5 Nb4
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 f8c5 c1e3 d8f6 c2c3 g8e7 d1d2 d7d5 d4b5 c5e3 d2e3 e8g8 b5c7 a8b8 c7d5 e7d5 e4d5 c6b4
FEN: 1rb2rk1/pp3ppp/5q2/3P4/1n6/2P1Q3/PP3PPP/RN2KB1R w KQ –

ECO: C45
Opening Name: Scotch Game: Horwitz Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Qh4 5. Nb5
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 d8h4 d4b5
FEN: r1b1kbnr/pppp1ppp/2n5/1N6/4P2q/8/PPP2PPP/RNBQKB1R b KQkq –

ECO: C45
Opening Name: Scotch Game: Horwitz Attack, Blackburne Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Qh4 5. Nb5 Bb4+ 6. Bd2 Qxe4+ 7. Be2 Kd8 8. O-O Bxd2 9. Qxd2
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 d8h4 d4b5 f8b4 c1d2 h4e4 f1e2 e8d8 e1g1 b4d2 d1d2
FEN: r1bk2nr/pppp1ppp/2n5/1N6/4q3/8/PPPQBPPP/RN3RK1 b – –

ECO: C45
Opening Name: Scotch Game: Malaniuk Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bb4+
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 f8b4
FEN: r1bqk1nr/pppp1ppp/2n5/8/1b1NP3/8/PPP2PPP/RNBQKB1R w KQkq –

ECO: C45
Opening Name: Scotch Game: Meitner Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. c3 Nge7 7. Nc2
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 f8c5 c1e3 d8f6 c2c3 g8e7 d4c2
FEN: r1b1k2r/ppppnppp/2n2q2/2b5/4P3/2P1B3/PPN2PPP/RN1QKB1R b KQkq –

ECO: C45
Opening Name: Scotch Game: Mieses Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6 5. Nxc6 bxc6 6. e5
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 g8f6 d4c6 b7c6 e4e5
FEN: r1bqkb1r/p1pp1ppp/2p2n2/4P3/8/8/PPP2PPP/RNBQKB1R b KQkq –

ECO: C45
Opening Name: Scotch Game: Modern Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Qh4 5. Nc3 Bb4
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 d8h4 b1c3 f8b4
FEN: r1b1k1nr/pppp1ppp/2n5/8/1b1NP2q/2N5/PPP2PPP/R1BQKB1R w KQkq –

ECO: C45
Opening Name: Scotch Game: Paulsen Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. c3 Nge7 7. Bb5
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 f8c5 c1e3 d8f6 c2c3 g8e7 f1b5
FEN: r1b1k2r/ppppnppp/2n2q2/1Bb5/3NP3/2P1B3/PP3PPP/RN1QK2R b KQkq –

ECO: C45
Opening Name: Scotch Game: Paulsen Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Qh4 5. Nf5
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 d8h4 d4f5
FEN: r1b1kbnr/pppp1ppp/2n5/5N2/4P2q/8/PPP2PPP/RNBQKB1R b KQkq –

ECO: C45
Opening Name: Scotch Game: Paulsen, Gunsberg Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. c3 Nge7 7. Bb5 Nd8
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 f8c5 c1e3 d8f6 c2c3 g8e7 f1b5 c6d8
FEN: r1bnk2r/ppppnppp/5q2/1Bb5/3NP3/2P1B3/PP3PPP/RN1QK2R w KQkq –

ECO: C45
Opening Name: Scotch Game: Potter Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Nb3
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 f8c5 d4b3
FEN: r1bqk1nr/pppp1ppp/2n5/2b5/4P3/1N6/PPP2PPP/RNBQKB1R b KQkq –

ECO: C45
Opening Name: Scotch Game: Romanishin Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Nb3 Bb4+
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 f8c5 d4b3 c5b4
FEN: r1bqk1nr/pppp1ppp/2n5/8/1b2P3/1N6/PPP2PPP/RNBQKB1R w KQkq –

ECO: C45
Opening Name: Scotch Game: Rosenthal Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Qh4 5. Nb5 Bb4+ 6. Bd2 Qxe4+ 7. Be2 Kd8 8. O-O Bxd2 9. Nxd2 Qg6
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 d8h4 d4b5 f8b4 c1d2 h4e4 f1e2 e8d8 e1g1 b4d2 b1d2 e4g6
FEN: r1bk2nr/pppp1ppp/2n3q1/1N6/8/8/PPPNBPPP/R2Q1RK1 w – –

ECO: C45
Opening Name: Scotch Game: Schmidt Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 g8f6
FEN: r1bqkb1r/pppp1ppp/2n2n2/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq –

ECO: C45
Opening Name: Scotch Game: Steinitz Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Qh4
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 d8h4
FEN: r1b1kbnr/pppp1ppp/2n5/8/3NP2q/8/PPP2PPP/RNBQKB1R w KQkq –

ECO: C45
Opening Name: Scotch Game: Steinitz Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Qh4 5. Nc3
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 d8h4 b1c3
FEN: r1b1kbnr/pppp1ppp/2n5/8/3NP2q/2N5/PPP2PPP/R1BQKB1R b KQkq –

ECO: C45
Opening Name: Scotch Game: Tartakower Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6 5. Nxc6 bxc6 6. Nd2
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 g8f6 d4c6 b7c6 b1d2
FEN: r1bqkb1r/p1pp1ppp/2p2n2/8/4P3/8/PPPN1PPP/R1BQKB1R b KQkq –

ECO: C46
Opening Name: Three Knights Opening
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3
UCI: e2e4 e7e5 g1f3 b8c6 b1c3
FEN: r1bqkbnr/pppp1ppp/2n5/4p3/4P3/2N2N2/PPPP1PPP/R1BQKB1R b KQkq –

ECO: C46
Opening Name: Three Knights Opening
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Bb4
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 f8b4
FEN: r1bqk1nr/pppp1ppp/2n5/4p3/1b2P3/2N2N2/PPPP1PPP/R1BQKB1R w KQkq –

ECO: C46
Opening Name: Three Knights Opening: Schlechter Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Bb4 4. Nd5 Nf6
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 f8b4 c3d5 g8f6
FEN: r1bqk2r/pppp1ppp/2n2n2/3Np3/1b2P3/5N2/PPPP1PPP/R1BQKB1R w KQkq –

ECO: C46
Opening Name: Three Knights Opening: Steinitz Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 g6
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 g7g6
FEN: r1bqkbnr/pppp1p1p/2n3p1/4p3/4P3/2N2N2/PPPP1PPP/R1BQKB1R w KQkq –

ECO: C46
Opening Name: Three Knights Opening: Steinitz-Rosenthal Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 g6 4. d4 exd4 5. Nd5
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 g7g6 d2d4 e5d4 c3d5
FEN: r1bqkbnr/pppp1p1p/2n3p1/3N4/3pP3/5N2/PPP2PPP/R1BQKB1R b KQkq –

ECO: C46
Opening Name: Three Knights Opening: Winawer Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 f5
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 f7f5
FEN: r1bqkbnr/pppp2pp/2n5/4pp2/4P3/2N2N2/PPPP1PPP/R1BQKB1R w KQkq –

ECO: C47
Opening Name: Four Knights Game
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 g8f6
FEN: r1bqkb1r/pppp1ppp/2n2n2/4p3/4P3/2N2N2/PPPP1PPP/R1BQKB1R w KQkq –

ECO: C47
Opening Name: Four Knights Game: Glek System
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. g3
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 g2g3
FEN: r1bqkb1r/pppp1ppp/2n2n2/4p3/4P3/2N2NP1/PPPP1P1P/R1BQKB1R b KQkq –

ECO: C47
Opening Name: Four Knights Game: Gunsberg Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. a3
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 a2a3
FEN: r1bqkb1r/pppp1ppp/2n2n2/4p3/4P3/P1N2N2/1PPP1PPP/R1BQKB1R b KQkq –

ECO: C47
Opening Name: Four Knights Game: Halloween Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Nxe5
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f3e5
FEN: r1bqkb1r/pppp1ppp/2n2n2/4N3/4P3/2N5/PPPP1PPP/R1BQKB1R b KQkq –

ECO: C47
Opening Name: Four Knights Game: Halloween Gambit, Oldtimer Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Nxe5 Nxe5 5. d4 Ng6 6. e5 Ng8 7. Bc4 Bb4 8. Qf3 f5
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f3e5 c6e5 d2d4 e5g6 e4e5 f6g8 f1c4 f8b4 d1f3 f7f5
FEN: r1bqk1nr/pppp2pp/6n1/4Pp2/1bBP4/2N2Q2/PPP2PPP/R1B1K2R w KQkq f6

ECO: C47
Opening Name: Four Knights Game: Halloween Gambit, Plasma Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Nxe5 Nxe5 5. d4 Nc6 6. d5 Ne5 7. f4 Ng6 8. e5 Ng8 9. d6 cxd6 10. exd6 Qf6 11. Nb5 Rb8
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f3e5 c6e5 d2d4 e5c6 d4d5 c6e5 f2f4 e5g6 e4e5 f6g8 d5d6 c7d6 e5d6 d8f6 c3b5 a8b8
FEN: 1rb1kbnr/pp1p1ppp/3P1qn1/1N6/5P2/8/PPP3PP/R1BQKB1R w KQk –

ECO: C47
Opening Name: Four Knights Game: Italian Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Nc3
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 b1c3
FEN: r1bqkb1r/pppp1ppp/2n2n2/4p3/2B1P3/2N2N2/PPPP1PPP/R1BQK2R b KQkq –

ECO: C47
Opening Name: Four Knights Game: Italian Variation, Noa Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Nc3 Nxe4 5. Bxf7+
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 b1c3 f6e4 c4f7
FEN: r1bqkb1r/pppp1Bpp/2n5/4p3/4n3/2N2N2/PPPP1PPP/R1BQK2R b KQkq –

ECO: C47
Opening Name: Four Knights Game: Scotch Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 d2d4
FEN: r1bqkb1r/pppp1ppp/2n2n2/4p3/3PP3/2N2N2/PPP2PPP/R1BQKB1R b KQkq –

ECO: C47
Opening Name: Four Knights Game: Scotch Variation Accepted
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 exd4
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 d2d4 e5d4
FEN: r1bqkb1r/pppp1ppp/2n2n2/8/3pP3/2N2N2/PPP2PPP/R1BQKB1R w KQkq –

ECO: C47
Opening Name: Four Knights Game: Scotch Variation, Belgrade Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 exd4 5. Nd5
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 d2d4 e5d4 c3d5
FEN: r1bqkb1r/pppp1ppp/2n2n2/3N4/3pP3/5N2/PPP2PPP/R1BQKB1R b KQkq –

ECO: C47
Opening Name: Four Knights Game: Scotch Variation, Belgrade Gambit, Modern Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 exd4 5. Nd5 Nxe4 6. Qe2 f5
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 d2d4 e5d4 c3d5 f6e4 d1e2 f7f5
FEN: r1bqkb1r/pppp2pp/2n5/3N1p2/3pn3/5N2/PPP1QPPP/R1B1KB1R w KQkq –

ECO: C47
Opening Name: Four Knights Game: Scotch Variation, Krause Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 Bb4 5. Nxe5
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 d2d4 f8b4 f3e5
FEN: r1bqk2r/pppp1ppp/2n2n2/4N3/1b1PP3/2N5/PPP2PPP/R1BQKB1R b KQkq –

ECO: C47
Opening Name: Four Knights Game: Scotch Variation, Krause Gambit, Leonhardt Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 Bb4 5. Nxe5 Qe7
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 d2d4 f8b4 f3e5 d8e7
FEN: r1b1k2r/ppppqppp/2n2n2/4N3/1b1PP3/2N5/PPP2PPP/R1BQKB1R w KQkq –

ECO: C47
Opening Name: Four Knights Game: Scotch Variation, Oxford Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 Bb4 5. d5 Nd4
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 d2d4 f8b4 d4d5 c6d4
FEN: r1bqk2r/pppp1ppp/5n2/3Pp3/1b1nP3/2N2N2/PPP2PPP/R1BQKB1R w KQkq –

ECO: C47
Opening Name: Four Knights Game: Scotch Variation, Schmid Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 exd4 5. Nxd4 Nxe4
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 d2d4 e5d4 f3d4 f6e4
FEN: r1bqkb1r/pppp1ppp/2n5/8/3Nn3/2N5/PPP2PPP/R1BQKB1R w KQkq –

ECO: C48
Opening Name: Four Knights Game: Spanish Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5
FEN: r1bqkb1r/pppp1ppp/2n2n2/1B2p3/4P3/2N2N2/PPPP1PPP/R1BQK2R b KQkq –

ECO: C48
Opening Name: Four Knights Game: Spanish Variation, Bardeleben Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bc5 5. O-O O-O 6. Nxe5 Nxe5 7. d4 Bd6 8. f4 Nc6 9. e5 Bb4
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8c5 e1g1 e8g8 f3e5 c6e5 d2d4 c5d6 f2f4 e5c6 e4e5 d6b4
FEN: r1bq1rk1/pppp1ppp/2n2n2/1B2P3/1b1P1P2/2N5/PPP3PP/R1BQ1RK1 w – –

ECO: C48
Opening Name: Four Knights Game: Spanish Variation, Classical Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bc5
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8c5
FEN: r1bqk2r/pppp1ppp/2n2n2/1Bb1p3/4P3/2N2N2/PPPP1PPP/R1BQK2R w KQkq –

ECO: C48
Opening Name: Four Knights Game: Spanish Variation, Ranken Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 a6 5. Bxc6
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 a7a6 b5c6
FEN: r1bqkb1r/1ppp1ppp/p1B2n2/4p3/4P3/2N2N2/PPPP1PPP/R1BQK2R b KQkq –

ECO: C48
Opening Name: Four Knights Game: Spanish Variation, Rubinstein Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Nd4
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 c6d4
FEN: r1bqkb1r/pppp1ppp/5n2/1B2p3/3nP3/2N2N2/PPPP1PPP/R1BQK2R w KQkq –

ECO: C48
Opening Name: Four Knights Game: Spanish Variation, Rubinstein Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Nd4 5. Be2
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 c6d4 b5e2
FEN: r1bqkb1r/pppp1ppp/5n2/4p3/3nP3/2N2N2/PPPPBPPP/R1BQK2R b KQkq –

ECO: C48
Opening Name: Four Knights Game: Spanish Variation, Rubinstein Variation
SAN: 1. e4 e5 2. Nf3 Nf6 3. Nc3 Nc6 4. Bb5 Nd4 5. Nxe5 Qe7 6. f4
UCI: e2e4 e7e5 g1f3 g8f6 b1c3 b8c6 f1b5 c6d4 f3e5 d8e7 f2f4
FEN: r1b1kb1r/ppppqppp/5n2/1B2N3/3nPP2/2N5/PPPP2PP/R1BQK2R b KQkq –

ECO: C48
Opening Name: Four Knights Game: Spanish Variation, Rubinstein Variation Accepted
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Nd4 5. Nxd4
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 c6d4 f3d4
FEN: r1bqkb1r/pppp1ppp/5n2/1B2p3/3NP3/2N5/PPPP1PPP/R1BQK2R b KQkq –

ECO: C48
Opening Name: Four Knights Game: Spanish Variation, Rubinstein Variation, Henneberger Variation
SAN: 1. e4 e5 2. Nf3 Nf6 3. Nc3 Nc6 4. Bb5 Nd4 5. O-O
UCI: e2e4 e7e5 g1f3 g8f6 b1c3 b8c6 f1b5 c6d4 e1g1
FEN: r1bqkb1r/pppp1ppp/5n2/1B2p3/3nP3/2N2N2/PPPP1PPP/R1BQ1RK1 b kq –

ECO: C48
Opening Name: Four Knights Game: Spanish Variation, Rubinstein Variation, Marshall Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Nd4 5. Ba4 Bc5 6. Nxe5 O-O
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 c6d4 b5a4 f8c5 f3e5 e8g8
FEN: r1bq1rk1/pppp1ppp/5n2/2b1N3/B2nP3/2N5/PPPP1PPP/R1BQK2R w KQ –

ECO: C48
Opening Name: Four Knights Game: Spanish Variation, Rubinstein Variation, Marshall Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Nd4 5. Nxe5 Bc5 6. O-O O-O
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 c6d4 f3e5 f8c5 e1g1 e8g8
FEN: r1bq1rk1/pppp1ppp/5n2/1Bb1N3/3nP3/2N5/PPPP1PPP/R1BQ1RK1 w – –

ECO: C48
Opening Name: Four Knights Game: Spanish Variation, Rubinstein Variation, Maróczy Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Nd4 5. Be2 Nxf3+ 6. Bxf3 Bc5 7. O-O O-O 8. d3 d6 9. Na4 Bb6
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 c6d4 b5e2 d4f3 e2f3 f8c5 e1g1 e8g8 d2d3 d7d6 c3a4 c5b6
FEN: r1bq1rk1/ppp2ppp/1b1p1n2/4p3/N3P3/3P1B2/PPP2PPP/R1BQ1RK1 w – –

ECO: C48
Opening Name: Four Knights Game: Spanish Variation, Spielmann Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 a6 5. Bxc6 dxc6 6. Nxe5 Nxe4 7. Nxe4 Qd4 8. O-O Qxe5 9. Re1 Be6 10. d4 Qd5
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 a7a6 b5c6 d7c6 f3e5 f6e4 c3e4 d8d4 e1g1 d4e5 f1e1 c8e6 d2d4 e5d5
FEN: r3kb1r/1pp2ppp/p1p1b3/3q4/3PN3/8/PPP2PPP/R1BQR1K1 w kq –

ECO: C49
Opening Name: Four Knights Game: Spanish Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 Bxc3
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8b4 e1g1 e8g8 d2d3 b4c3
FEN: r1bq1rk1/pppp1ppp/2n2n2/1B2p3/4P3/2bP1N2/PPP2PPP/R1BQ1RK1 w – –

ECO: C49
Opening Name: Four Knights Game: Spanish Variation, Alatortsev Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 Qe7 7. Ne2 d5
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8b4 e1g1 e8g8 d2d3 d8e7 c3e2 d7d5
FEN: r1b2rk1/ppp1qppp/2n2n2/1B1pp3/1b2P3/3P1N2/PPP1NPPP/R1BQ1RK1 w – –

ECO: C49
Opening Name: Four Knights Game: Spanish Variation, Double Spanish
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8b4
FEN: r1bqk2r/pppp1ppp/2n2n2/1B2p3/1b2P3/2N2N2/PPPP1PPP/R1BQK2R w KQkq –

ECO: C49
Opening Name: Four Knights Game: Spanish Variation, Double Spanish
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8b4 e1g1 e8g8 d2d3
FEN: r1bq1rk1/pppp1ppp/2n2n2/1B2p3/1b2P3/2NP1N2/PPP2PPP/R1BQ1RK1 b – –

ECO: C49
Opening Name: Four Knights Game: Spanish Variation, Gunsberg Counterattack
SAN: 1. e4 e5 2. Nf3 Nf6 3. Nc3 Nc6 4. Bb5 Bb4 5. O-O O-O 6. Nd5 Nxd5 7. exd5 e4
UCI: e2e4 e7e5 g1f3 g8f6 b1c3 b8c6 f1b5 f8b4 e1g1 e8g8 c3d5 f6d5 e4d5 e5e4
FEN: r1bq1rk1/pppp1ppp/2n5/1B1P4/1b2p3/5N2/PPPP1PPP/R1BQ1RK1 w – –

ECO: C49
Opening Name: Four Knights Game: Spanish Variation, Janowski Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 Bxc3 7. bxc3 d6 8. Re1
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8b4 e1g1 e8g8 d2d3 b4c3 b2c3 d7d6 f1e1
FEN: r1bq1rk1/ppp2ppp/2np1n2/1B2p3/4P3/2PP1N2/P1P2PPP/R1BQR1K1 b – –

ECO: C49
Opening Name: Four Knights Game: Spanish Variation, Nimzowitsch Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. Bxc6
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8b4 e1g1 e8g8 b5c6
FEN: r1bq1rk1/pppp1ppp/2B2n2/4p3/1b2P3/2N2N2/PPPP1PPP/R1BQ1RK1 b – –

ECO: C49
Opening Name: Four Knights Game: Spanish Variation, Svenonius Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 Bxc3 7. bxc3 d5
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8b4 e1g1 e8g8 d2d3 b4c3 b2c3 d7d5
FEN: r1bq1rk1/ppp2ppp/2n2n2/1B1pp3/4P3/2PP1N2/P1P2PPP/R1BQ1RK1 w – –

ECO: C49
Opening Name: Four Knights Game: Spanish Variation, Symmetrical Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8b4 e1g1 e8g8 d2d3 d7d6
FEN: r1bq1rk1/ppp2ppp/2np1n2/1B2p3/1b2P3/2NP1N2/PPP2PPP/R1BQ1RK1 w – –

ECO: C49
Opening Name: Four Knights Game: Spanish Variation, Symmetrical Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 7. Bg5 Bxc3 8. bxc3 Qe7 9. Re1 Nd8 10. d4 Bg4
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8b4 e1g1 e8g8 d2d3 d7d6 c1g5 b4c3 b2c3 d8e7 f1e1 c6d8 d3d4 c8g4
FEN: r2n1rk1/ppp1qppp/3p1n2/1B2p1B1/3PP1b1/2P2N2/P1P2PPP/R2QR1K1 w – –

ECO: C49
Opening Name: Four Knights Game: Spanish Variation, Symmetrical Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 7. Bg5 Ne7
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8b4 e1g1 e8g8 d2d3 d7d6 c1g5 c6e7
FEN: r1bq1rk1/ppp1nppp/3p1n2/1B2p1B1/1b2P3/2NP1N2/PPP2PPP/R2Q1RK1 w – –

ECO: C49
Opening Name: Four Knights Game: Spanish Variation, Symmetrical Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 7. Ne2
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8b4 e1g1 e8g8 d2d3 d7d6 c3e2
FEN: r1bq1rk1/ppp2ppp/2np1n2/1B2p3/1b2P3/3P1N2/PPP1NPPP/R1BQ1RK1 b – –

ECO: C49
Opening Name: Four Knights Game: Spanish Variation, Symmetrical Variation, Blake Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 7. Bg5 Ne7 8. Nh4 c6 9. Bc4 d5 10. Bb3 Qd6
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8b4 e1g1 e8g8 d2d3 d7d6 c1g5 c6e7 f3h4 c7c6 b5c4 d6d5 c4b3 d8d6
FEN: r1b2rk1/pp2nppp/2pq1n2/3pp1B1/1b2P2N/1BNP4/PPP2PPP/R2Q1RK1 w – –

ECO: C49
Opening Name: Four Knights Game: Spanish Variation, Symmetrical Variation, Metger Unpin
SAN: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 7. Bg5 Bxc3 8. bxc3 Qe7
UCI: e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8b4 e1g1 e8g8 d2d3 d7d6 c1g5 b4c3 b2c3 d8e7
FEN: r1b2rk1/ppp1qppp/2np1n2/1B2p1B1/4P3/2PP1N2/P1P2PPP/R2Q1RK1 w – –

ECO: C49
Opening Name: Four Knights Game: Spanish Variation, Symmetrical Variation, Tarrasch Variation
SAN: 1. e4 e5 2. Nf3 Nf6 3. Nc3 Nc6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 7. Bg5 Be6
UCI: e2e4 e7e5 g1f3 g8f6 b1c3 b8c6 f1b5 f8b4 e1g1 e8g8 d2d3 d7d6 c1g5 c8e6
FEN: r2q1rk1/ppp2ppp/2npbn2/1B2p1B1/1b2P3/2NP1N2/PPP2PPP/R2Q1RK1 w – –

ECO: C50
Opening Name: Four Knights Game: Italian Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. Nc3 Nf6
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b1c3 g8f6
FEN: r1bqk2r/pppp1ppp/2n2n2/2b1p3/2B1P3/2N2N2/PPPP1PPP/R1BQK2R w KQkq –

ECO: C50
Opening Name: Italian Game
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4
UCI: e2e4 e7e5 g1f3 b8c6 f1c4
FEN: r1bqkbnr/pppp1ppp/2n5/4p3/2B1P3/5N2/PPPP1PPP/RNBQK2R b KQkq –

ECO: C50
Opening Name: Italian Game: Anti-Fried Liver Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 h6
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 h7h6
FEN: r1bqkbnr/pppp1pp1/2n4p/4p3/2B1P3/5N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: C50
Opening Name: Italian Game: Blackburne-Kostić Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nd4
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 c6d4
FEN: r1bqkbnr/pppp1ppp/8/4p3/2BnP3/5N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: C50
Opening Name: Italian Game: Classical Variation, Albin Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. O-O Nf6 5. c3
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 e1g1 g8f6 c2c3
FEN: r1bqk2r/pppp1ppp/2n2n2/2b1p3/2B1P3/2P2N2/PP1P1PPP/RNBQ1RK1 b kq –

ECO: C50
Opening Name: Italian Game: Deutz Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. O-O Nf6 5. d4
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 e1g1 g8f6 d2d4
FEN: r1bqk2r/pppp1ppp/2n2n2/2b1p3/2BPP3/5N2/PPP2PPP/RNBQ1RK1 b kq –

ECO: C50
Opening Name: Italian Game: Giuoco Pianissimo
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 d2d3
FEN: r1bqk1nr/pppp1ppp/2n5/2b1p3/2B1P3/3P1N2/PPP2PPP/RNBQK2R b KQkq –

ECO: C50
Opening Name: Italian Game: Giuoco Pianissimo
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. O-O Bc5 5. Nc3 d6 6. d3
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 e1g1 f8c5 b1c3 d7d6 d2d3
FEN: r1bqk2r/ppp2ppp/2np1n2/2b1p3/2B1P3/2NP1N2/PPP2PPP/R1BQ1RK1 b kq –

ECO: C50
Opening Name: Italian Game: Giuoco Pianissimo, Canal Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3 Nf6 5. Nc3 d6 6. Bg5
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 d2d3 g8f6 b1c3 d7d6 c1g5
FEN: r1bqk2r/ppp2ppp/2np1n2/2b1p1B1/2B1P3/2NP1N2/PPP2PPP/R2QK2R b KQkq –

ECO: C50
Opening Name: Italian Game: Giuoco Pianissimo, Dubois Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3 f5 5. Ng5 f4
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 d2d3 f7f5 f3g5 f5f4
FEN: r1bqk1nr/pppp2pp/2n5/2b1p1N1/2B1Pp2/3P4/PPP2PPP/RNBQK2R w KQkq –

ECO: C50
Opening Name: Italian Game: Giuoco Pianissimo, Italian Four Knights Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3 Nf6 5. Nc3
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 d2d3 g8f6 b1c3
FEN: r1bqk2r/pppp1ppp/2n2n2/2b1p3/2B1P3/2NP1N2/PPP2PPP/R1BQK2R b KQkq –

ECO: C50
Opening Name: Italian Game: Giuoco Pianissimo, Lucchini Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3 f5
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 d2d3 f7f5
FEN: r1bqk1nr/pppp2pp/2n5/2b1pp2/2B1P3/3P1N2/PPP2PPP/RNBQK2R w KQkq –

ECO: C50
Opening Name: Italian Game: Giuoco Pianissimo, Normal
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Bc5
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 d2d3 f8c5
FEN: r1bqk2r/pppp1ppp/2n2n2/2b1p3/2B1P3/3P1N2/PPP2PPP/RNBQK2R w KQkq –

ECO: C50
Opening Name: Italian Game: Giuoco Piano
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5
FEN: r1bqk1nr/pppp1ppp/2n5/2b1p3/2B1P3/5N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: C50
Opening Name: Italian Game: Hungarian Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Be7
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8e7
FEN: r1bqk1nr/ppppbppp/2n5/4p3/2B1P3/5N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: C50
Opening Name: Italian Game: Hungarian Defense, Tartakower Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Be7 4. d4 exd4 5. c3 Nf6 6. e5 Ne4
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8e7 d2d4 e5d4 c2c3 g8f6 e4e5 f6e4
FEN: r1bqk2r/ppppbppp/2n5/4P3/2Bpn3/2P2N2/PP3PPP/RNBQK2R w KQkq –

ECO: C50
Opening Name: Italian Game: Jerome Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. Bxf7+
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c4f7
FEN: r1bqk1nr/pppp1Bpp/2n5/2b1p3/4P3/5N2/PPPP1PPP/RNBQK2R b KQkq –

ECO: C50
Opening Name: Italian Game: Paris Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 d6
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 d7d6
FEN: r1bqkbnr/ppp2ppp/2np4/4p3/2B1P3/5N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: C50
Opening Name: Italian Game: Rosentreter Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d4
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 d2d4
FEN: r1bqk1nr/pppp1ppp/2n5/2b1p3/2BPP3/5N2/PPP2PPP/RNBQK2R b KQkq –

ECO: C50
Opening Name: Italian Game: Rousseau Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 f5
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f7f5
FEN: r1bqkbnr/pppp2pp/2n5/4pp2/2B1P3/5N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: C51
Opening Name: Italian Game: Evans Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4
FEN: r1bqk1nr/pppp1ppp/2n5/2b1p3/1PB1P3/5N2/P1PP1PPP/RNBQK2R b KQkq –

ECO: C51
Opening Name: Italian Game: Evans Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Bc5 6. d4 exd4 7. O-O d6 8. cxd4 Bb6 9. Nc3 Bg4
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4c5 d2d4 e5d4 e1g1 d7d6 c3d4 c5b6 b1c3 c8g4
FEN: r2qk1nr/ppp2ppp/1bnp4/8/2BPP1b1/2N2N2/P4PPP/R1BQ1RK1 w kq –

ECO: C51
Opening Name: Italian Game: Evans Gambit Accepted
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4
FEN: r1bqk1nr/pppp1ppp/2n5/4p3/1bB1P3/5N2/P1PP1PPP/RNBQK2R w KQkq –

ECO: C51
Opening Name: Italian Game: Evans Gambit Declined
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bb6
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b6
FEN: r1bqk1nr/pppp1ppp/1bn5/4p3/1PB1P3/5N2/P1PP1PPP/RNBQK2R w KQkq –

ECO: C51
Opening Name: Italian Game: Evans Gambit Declined
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bb6 5. a4
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b6 a2a4
FEN: r1bqk1nr/pppp1ppp/1bn5/4p3/PPB1P3/5N2/2PP1PPP/RNBQK2R b KQkq –

ECO: C51
Opening Name: Italian Game: Evans Gambit Declined, Cordel Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bb6 5. Bb2
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b6 c1b2
FEN: r1bqk1nr/pppp1ppp/1bn5/4p3/1PB1P3/5N2/PBPP1PPP/RN1QK2R b KQkq –

ECO: C51
Opening Name: Italian Game: Evans Gambit Declined, Hicken Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bb6 5. b5 Na5 6. Nxe5 Qg5 7. Qf3 Qxe5 8. Qxf7+ Kd8 9. Bb2
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b6 b4b5 c6a5 f3e5 d8g5 d1f3 g5e5 f3f7 e8d8 c1b2
FEN: r1bk2nr/pppp1Qpp/1b6/nP2q3/2B1P3/8/PBPP1PPP/RN2K2R b KQ –

ECO: C51
Opening Name: Italian Game: Evans Gambit Declined, Hirschbach Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bb6 5. b5 Na5 6. Nxe5 Qg5
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b6 b4b5 c6a5 f3e5 d8g5
FEN: r1b1k1nr/pppp1ppp/1b6/nP2N1q1/2B1P3/8/P1PP1PPP/RNBQK2R w KQkq –

ECO: C51
Opening Name: Italian Game: Evans Gambit Declined, Lange Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bb6 5. b5 Na5 6. Nxe5 Nh6
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b6 b4b5 c6a5 f3e5 g8h6
FEN: r1bqk2r/pppp1ppp/1b5n/nP2N3/2B1P3/8/P1PP1PPP/RNBQK2R w KQkq –

ECO: C51
Opening Name: Italian Game: Evans Gambit Declined, Pavlov Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bb6 5. b5 Na5 6. Nxe5 Nh6 7. d4 d6 8. Bxh6 dxe5 9. Bxg7 Rg8 10. Bxf7+ Kxf7 11. Bxe5 Qg5 12. Nd2
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b6 b4b5 c6a5 f3e5 g8h6 d2d4 d7d6 c1h6 d6e5 h6g7 h8g8 c4f7 e8f7 g7e5 d8g5 b1d2
FEN: r1b3r1/ppp2k1p/1b6/nP2B1q1/3PP3/8/P1PN1PPP/R2QK2R b KQ –

ECO: C51
Opening Name: Italian Game: Evans Gambit Declined, Showalter Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bb6 5. a4 a6 6. Nc3
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b6 a2a4 a7a6 b1c3
FEN: r1bqk1nr/1ppp1ppp/pbn5/4p3/PPB1P3/2N2N2/2PP1PPP/R1BQK2R b KQkq –

ECO: C51
Opening Name: Italian Game: Evans Gambit Declined, Vasquez Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bb6 5. b5 Na5 6. Nxe5 Qg5 7. Bxf7+ Ke7 8. Qh5
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b6 b4b5 c6a5 f3e5 d8g5 c4f7 e8e7 d1h5
FEN: r1b3nr/ppppkBpp/1b6/nP2N1qQ/4P3/8/P1PP1PPP/RNB1K2R b KQ –

ECO: C51
Opening Name: Italian Game: Evans Gambit, Anderssen Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Be7
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4e7
FEN: r1bqk1nr/ppppbppp/2n5/4p3/2B1P3/2P2N2/P2P1PPP/RNBQK2R w KQkq –

ECO: C51
Opening Name: Italian Game: Evans Gambit, Anderssen Variation, Cordel Line
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Be7 6. d4 Na5
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4e7 d2d4 c6a5
FEN: r1bqk1nr/ppppbppp/8/n3p3/2BPP3/2P2N2/P4PPP/RNBQK2R w KQkq –

ECO: C51
Opening Name: Italian Game: Evans Gambit, Fontaine Countergambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 b5
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 b7b5
FEN: r1bqk1nr/p1pp1ppp/2n5/1pb1p3/1PB1P3/5N2/P1PP1PPP/RNBQK2R w KQkq –

ECO: C51
Opening Name: Italian Game: Evans Gambit, Fraser Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Bc5 6. d4 exd4 7. O-O d6 8. cxd4 Bb6 9. Nc3 Bg4 10. Qa4
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4c5 d2d4 e5d4 e1g1 d7d6 c3d4 c5b6 b1c3 c8g4 d1a4
FEN: r2qk1nr/ppp2ppp/1bnp4/8/Q1BPP1b1/2N2N2/P4PPP/R1B2RK1 b kq –

ECO: C51
Opening Name: Italian Game: Evans Gambit, Fraser-Mortimer Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Bc5 6. d4 exd4 7. O-O d6 8. cxd4 Bb6 9. Nc3 Bg4 10. Qa4 Bd7 11. Qb3 Na5 12. Bxf7+ Kf8 13. Qc2
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4c5 d2d4 e5d4 e1g1 d7d6 c3d4 c5b6 b1c3 c8g4 d1a4 g4d7 a4b3 c6a5 c4f7 e8f8 b3c2
FEN: r2q1knr/pppb1Bpp/1b1p4/n7/3PP3/2N2N2/P1Q2PPP/R1B2RK1 b – –

ECO: C51
Opening Name: Italian Game: Evans Gambit, Göring Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Bc5 6. d4 exd4 7. O-O d6 8. cxd4 Bb6 9. Nc3 Na5 10. Bg5
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4c5 d2d4 e5d4 e1g1 d7d6 c3d4 c5b6 b1c3 c6a5 c1g5
FEN: r1bqk1nr/ppp2ppp/1b1p4/n5B1/2BPP3/2N2N2/P4PPP/R2Q1RK1 b kq –

ECO: C51
Opening Name: Italian Game: Evans Gambit, Harding Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Bc5 6. d4 exd4 7. cxd4 Bb4+ 8. Bd2
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4c5 d2d4 e5d4 c3d4 c5b4 c1d2
FEN: r1bqk1nr/pppp1ppp/2n5/8/1bBPP3/5N2/P2B1PPP/RN1QK2R b KQkq –

ECO: C51
Opening Name: Italian Game: Evans Gambit, Hein Countergambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 d5
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 d7d5
FEN: r1bqk1nr/ppp2ppp/2n5/2bpp3/1PB1P3/5N2/P1PP1PPP/RNBQK2R w KQkq –

ECO: C51
Opening Name: Italian Game: Evans Gambit, Mayet Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Bf8
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4f8
FEN: r1bqkbnr/pppp1ppp/2n5/4p3/2B1P3/2P2N2/P2P1PPP/RNBQK2R w KQkq –

ECO: C51
Opening Name: Italian Game: Evans Gambit, McDonnell Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Bc5
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4c5
FEN: r1bqk1nr/pppp1ppp/2n5/2b1p3/2B1P3/2P2N2/P2P1PPP/RNBQK2R w KQkq –

ECO: C51
Opening Name: Italian Game: Evans Gambit, McDonnell Defense, Main Line
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Bc5 6. d4 exd4 7. O-O d6 8. cxd4 Bb6
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4c5 d2d4 e5d4 e1g1 d7d6 c3d4 c5b6
FEN: r1bqk1nr/ppp2ppp/1bnp4/8/2BPP3/5N2/P4PPP/RNBQ1RK1 w kq –

ECO: C51
Opening Name: Italian Game: Evans Gambit, Morphy Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. d4 exd4 7. O-O d6 8. cxd4 Bb6 9. Nc3
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4a5 d2d4 e5d4 e1g1 d7d6 c3d4 a5b6 b1c3
FEN: r1bqk1nr/ppp2ppp/1bnp4/8/2BPP3/2N2N2/P4PPP/R1BQ1RK1 b kq –

ECO: C51
Opening Name: Italian Game: Evans Gambit, Mortimer-Evans Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Bc5 6. d4 exd4 7. O-O d6 8. cxd4 Bb6 9. Nc3 Bg4 10. Qa4 Bd7 11. Qb3 Na5 12. Bxf7+ Kf8 13. Qc2 Kxf7
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4c5 d2d4 e5d4 e1g1 d7d6 c3d4 c5b6 b1c3 c8g4 d1a4 g4d7 a4b3 c6a5 c4f7 e8f8 b3c2 f8f7
FEN: r2q2nr/pppb1kpp/1b1p4/n7/3PP3/2N2N2/P1Q2PPP/R1B2RK1 w – –

ECO: C51
Opening Name: Italian Game: Evans Gambit, Paulsen Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Bc5 6. d4 exd4 7. O-O d6 8. cxd4 Bb6 9. d5 Na5 10. Bb2 Ne7
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4c5 d2d4 e5d4 e1g1 d7d6 c3d4 c5b6 d4d5 c6a5 c1b2 g8e7
FEN: r1bqk2r/ppp1nppp/1b1p4/n2P4/2B1P3/5N2/PB3PPP/RN1Q1RK1 w kq –

ECO: C51
Opening Name: Italian Game: Evans Gambit, Steinitz Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Bc5 6. d4 exd4 7. O-O d6 8. cxd4 Bb6 9. Nc3 Na5 10. Bg5 f6 11. Be3
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4c5 d2d4 e5d4 e1g1 d7d6 c3d4 c5b6 b1c3 c6a5 c1g5 f7f6 g5e3
FEN: r1bqk1nr/ppp3pp/1b1p1p2/n7/2BPP3/2N1BN2/P4PPP/R2Q1RK1 b kq –

ECO: C51
Opening Name: Italian Game: Evans Gambit, Stone-Ware Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Bd6
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4d6
FEN: r1bqk1nr/pppp1ppp/2nb4/4p3/2B1P3/2P2N2/P2P1PPP/RNBQK2R w KQkq –

ECO: C51
Opening Name: Italian Game: Evans Gambit, Ulvestad Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Bc5 6. d4 exd4 7. O-O d6 8. cxd4 Bb6 9. d5 Na5 10. Bb2
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4c5 d2d4 e5d4 e1g1 d7d6 c3d4 c5b6 d4d5 c6a5 c1b2
FEN: r1bqk1nr/ppp2ppp/1b1p4/n2P4/2B1P3/5N2/PB3PPP/RN1Q1RK1 b kq –

ECO: C52
Opening Name: Italian Game: Evans Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. O-O d6
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4a5 e1g1 d7d6
FEN: r1bqk1nr/ppp2ppp/2np4/b3p3/2B1P3/2P2N2/P2P1PPP/RNBQ1RK1 w kq –

ECO: C52
Opening Name: Italian Game: Evans Gambit, Alapin-Steinitz Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. O-O d6 7. d4 Bg4
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4a5 e1g1 d7d6 d2d4 c8g4
FEN: r2qk1nr/ppp2ppp/2np4/b3p3/2BPP1b1/2P2N2/P4PPP/RNBQ1RK1 w kq –

ECO: C52
Opening Name: Italian Game: Evans Gambit, Anderssen Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. O-O Nf6 7. d4 exd4
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4a5 e1g1 g8f6 d2d4 e5d4
FEN: r1bqk2r/pppp1ppp/2n2n2/b7/2BpP3/2P2N2/P4PPP/RNBQ1RK1 w kq –

ECO: C52
Opening Name: Italian Game: Evans Gambit, Bronstein Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. d4 d6
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4a5 d2d4 d7d6
FEN: r1bqk1nr/ppp2ppp/2np4/b3p3/2BPP3/2P2N2/P4PPP/RNBQK2R w KQkq –

ECO: C52
Opening Name: Italian Game: Evans Gambit, Compromised Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. d4 exd4 7. O-O dxc3
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4a5 d2d4 e5d4 e1g1 d4c3
FEN: r1bqk1nr/pppp1ppp/2n5/b7/2B1P3/2p2N2/P4PPP/RNBQ1RK1 w kq –

ECO: C52
Opening Name: Italian Game: Evans Gambit, Compromised Defense, Main Line
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. d4 exd4 7. O-O dxc3 8. Qb3 Qf6 9. e5 Qg6 10. Nxc3 Nge7 11. Ba3
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4a5 d2d4 e5d4 e1g1 d4c3 d1b3 d8f6 e4e5 f6g6 b1c3 g8e7 c1a3
FEN: r1b1k2r/ppppnppp/2n3q1/b3P3/2B5/BQN2N2/P4PPP/R4RK1 b kq –

ECO: C52
Opening Name: Italian Game: Evans Gambit, Compromised Defense, Potter Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. d4 exd4 7. O-O dxc3 8. Qb3 Qf6 9. e5 Qg6 10. Nxc3 Nge7 11. Rd1
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4a5 d2d4 e5d4 e1g1 d4c3 d1b3 d8f6 e4e5 f6g6 b1c3 g8e7 f1d1
FEN: r1b1k2r/ppppnppp/2n3q1/b3P3/2B5/1QN2N2/P4PPP/R1BR2K1 b kq –

ECO: C52
Opening Name: Italian Game: Evans Gambit, Dufresne Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. d4 exd4 7. O-O d3
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4a5 d2d4 e5d4 e1g1 d4d3
FEN: r1bqk1nr/pppp1ppp/2n5/b7/2B1P3/2Pp1N2/P4PPP/RNBQ1RK1 w kq –

ECO: C52
Opening Name: Italian Game: Evans Gambit, Johner Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. d4 exd4 7. O-O b5
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4a5 d2d4 e5d4 e1g1 b7b5
FEN: r1bqk1nr/p1pp1ppp/2n5/bp6/2BpP3/2P2N2/P4PPP/RNBQ1RK1 w kq –

ECO: C52
Opening Name: Italian Game: Evans Gambit, Laroche Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. d4 Nf6
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4a5 d2d4 g8f6
FEN: r1bqk2r/pppp1ppp/2n2n2/b3p3/2BPP3/2P2N2/P4PPP/RNBQK2R w KQkq –

ECO: C52
Opening Name: Italian Game: Evans Gambit, Lasker Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. O-O d6 7. d4 Bb6
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4a5 e1g1 d7d6 d2d4 a5b6
FEN: r1bqk1nr/ppp2ppp/1bnp4/4p3/2BPP3/2P2N2/P4PPP/RNBQ1RK1 w kq –

ECO: C52
Opening Name: Italian Game: Evans Gambit, Leonhardt Countergambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. d4 b5
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4a5 d2d4 b7b5
FEN: r1bqk1nr/p1pp1ppp/2n5/bp2p3/2BPP3/2P2N2/P4PPP/RNBQK2R w KQkq –

ECO: C52
Opening Name: Italian Game: Evans Gambit, Levenfish Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. d4 d6 7. Qb3 Qd7 8. dxe5 dxe5 9. O-O Bb6 10. Ba3 Na5 11. Nxe5
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4a5 d2d4 d7d6 d1b3 d8d7 d4e5 d6e5 e1g1 a5b6 c1a3 c6a5 f3e5
FEN: r1b1k1nr/pppq1ppp/1b6/n3N3/2B1P3/BQP5/P4PPP/RN3RK1 b kq –

ECO: C52
Opening Name: Italian Game: Evans Gambit, Main Line
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4a5
FEN: r1bqk1nr/pppp1ppp/2n5/b3p3/2B1P3/2P2N2/P2P1PPP/RNBQK2R w KQkq –

ECO: C52
Opening Name: Italian Game: Evans Gambit, Mieses Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. d4 exd4 7. O-O Nge7
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4a5 d2d4 e5d4 e1g1 g8e7
FEN: r1bqk2r/ppppnppp/2n5/b7/2BpP3/2P2N2/P4PPP/RNBQ1RK1 w kq –

ECO: C52
Opening Name: Italian Game: Evans Gambit, Pierce Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. d4 exd4
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4a5 d2d4 e5d4
FEN: r1bqk1nr/pppp1ppp/2n5/b7/2BpP3/2P2N2/P4PPP/RNBQK2R w KQkq –

ECO: C52
Opening Name: Italian Game: Evans Gambit, Richardson Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. O-O Nf6 7. d4 O-O 8. Nxe5
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4a5 e1g1 g8f6 d2d4 e8g8 f3e5
FEN: r1bq1rk1/pppp1ppp/2n2n2/b3N3/2BPP3/2P5/P4PPP/RNBQ1RK1 b – –

ECO: C52
Opening Name: Italian Game: Evans Gambit, Sanders-Alapin Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. O-O d6 7. d4 Bd7
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4a5 e1g1 d7d6 d2d4 c8d7
FEN: r2qk1nr/pppb1ppp/2np4/b3p3/2BPP3/2P2N2/P4PPP/RNBQ1RK1 w kq –

ECO: C52
Opening Name: Italian Game: Evans Gambit, Slow Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. O-O
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4a5 e1g1
FEN: r1bqk1nr/pppp1ppp/2n5/b3p3/2B1P3/2P2N2/P2P1PPP/RNBQ1RK1 b kq –

ECO: C52
Opening Name: Italian Game: Evans Gambit, Sokolsky Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. d4 d6 7. Bg5
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4a5 d2d4 d7d6 c1g5
FEN: r1bqk1nr/ppp2ppp/2np4/b3p1B1/2BPP3/2P2N2/P4PPP/RN1QK2R b KQkq –

ECO: C52
Opening Name: Italian Game: Evans Gambit, Tartakower Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. d4 d6 7. Qb3
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4a5 d2d4 d7d6 d1b3
FEN: r1bqk1nr/ppp2ppp/2np4/b3p3/2BPP3/1QP2N2/P4PPP/RNB1K2R b KQkq –

ECO: C52
Opening Name: Italian Game: Evans Gambit, Waller Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. d4 exd4 7. O-O d6 8. Qb3
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4a5 d2d4 e5d4 e1g1 d7d6 d1b3
FEN: r1bqk1nr/ppp2ppp/2np4/b7/2BpP3/1QP2N2/P4PPP/RNB2RK1 b kq –

ECO: C53
Opening Name: Italian Game: Bird’s Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. b4
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 g8f6 b2b4
FEN: r1bqk2r/pppp1ppp/2n2n2/2b1p3/1PB1P3/2P2N2/P2P1PPP/RNBQK2R b KQkq –

ECO: C53
Opening Name: Italian Game: Classical Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3
FEN: r1bqk1nr/pppp1ppp/2n5/2b1p3/2B1P3/2P2N2/PP1P1PPP/RNBQK2R b KQkq –

ECO: C53
Opening Name: Italian Game: Classical Variation, Center Holding Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Qe7 5. d4 Bb6
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 d8e7 d2d4 c5b6
FEN: r1b1k1nr/ppppqppp/1bn5/4p3/2BPP3/2P2N2/PP3PPP/RNBQK2R w KQkq –

ECO: C53
Opening Name: Italian Game: Classical Variation, Closed Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Qe7
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 d8e7
FEN: r1b1k1nr/ppppqppp/2n5/2b1p3/2B1P3/2P2N2/PP1P1PPP/RNBQK2R w KQkq –

ECO: C53
Opening Name: Italian Game: Classical Variation, Eisinger Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Qe7 5. d4 Bb6 6. d5 Nb8 7. d6
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 d8e7 d2d4 c5b6 d4d5 c6b8 d5d6
FEN: rnb1k1nr/ppppqppp/1b1P4/4p3/2B1P3/2P2N2/PP3PPP/RNBQK2R b KQkq –

ECO: C53
Opening Name: Italian Game: Classical Variation, La Bourdonnais Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 d6 5. d4 exd4 6. cxd4 Bb6
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 d7d6 d2d4 e5d4 c3d4 c5b6
FEN: r1bqk1nr/ppp2ppp/1bnp4/8/2BPP3/5N2/PP3PPP/RNBQK2R w KQkq –

ECO: C53
Opening Name: Italian Game: Classical Variation, Mestel Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Qe7 5. d4 Bb6 6. Bg5
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 d8e7 d2d4 c5b6 c1g5
FEN: r1b1k1nr/ppppqppp/1bn5/4p1B1/2BPP3/2P2N2/PP3PPP/RN1QK2R b KQkq –

ECO: C53
Opening Name: Italian Game: Classical Variation, Tarrasch Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Qe7 5. d4 Bb6 6. O-O d6 7. a4 a6 8. h3 Nf6 9. Re1
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 d8e7 d2d4 c5b6 e1g1 d7d6 a2a4 a7a6 h2h3 g8f6 f1e1
FEN: r1b1k2r/1pp1qppp/pbnp1n2/4p3/P1BPP3/2P2N1P/1P3PP1/RNBQR1K1 b kq –

ECO: C54
Opening Name: Italian Game: Classical Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 g8f6
FEN: r1bqk2r/pppp1ppp/2n2n2/2b1p3/2B1P3/2P2N2/PP1P1PPP/RNBQK2R w KQkq –

ECO: C54
Opening Name: Italian Game: Classical Variation, Center Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 g8f6 d2d4
FEN: r1bqk2r/pppp1ppp/2n2n2/2b1p3/2BPP3/2P2N2/PP3PPP/RNBQK2R b KQkq –

ECO: C54
Opening Name: Italian Game: Classical Variation, Ghulam-Kassim Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. e5 Ne4 7. Bd5 Nxf2 8. Kxf2 dxc3+ 9. Kg3
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 g8f6 d2d4 e5d4 e4e5 f6e4 c4d5 e4f2 e1f2 d4c3 f2g3
FEN: r1bqk2r/pppp1ppp/2n5/2bBP3/8/2p2NK1/PP4PP/RNBQ3R b kq –

ECO: C54
Opening Name: Italian Game: Classical Variation, Giuoco Pianissimo
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 g8f6 d2d3
FEN: r1bqk2r/pppp1ppp/2n2n2/2b1p3/2B1P3/2PP1N2/PP3PPP/RNBQK2R b KQkq –

ECO: C54
Opening Name: Italian Game: Classical Variation, Giuoco Pianissimo
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 d6 6. Nbd2 O-O 7. O-O
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 g8f6 d2d3 d7d6 b1d2 e8g8 e1g1
FEN: r1bq1rk1/ppp2ppp/2np1n2/2b1p3/2B1P3/2PP1N2/PP1N1PPP/R1BQ1RK1 b – –

ECO: C54
Opening Name: Italian Game: Classical Variation, Giuoco Pianissimo
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 d6 6. O-O O-O
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 g8f6 d2d3 d7d6 e1g1 e8g8
FEN: r1bq1rk1/ppp2ppp/2np1n2/2b1p3/2B1P3/2PP1N2/PP3PPP/RNBQ1RK1 w – –

ECO: C54
Opening Name: Italian Game: Classical Variation, Giuoco Pianissimo
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. O-O Nf6 5. d3 h6 6. c3
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 e1g1 g8f6 d2d3 h7h6 c2c3
FEN: r1bqk2r/pppp1pp1/2n2n1p/2b1p3/2B1P3/2PP1N2/PP3PPP/RNBQ1RK1 b kq –

ECO: C54
Opening Name: Italian Game: Classical Variation, Giuoco Pianissimo
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. O-O Nf6 5. d3 d6 6. c3 a6
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 e1g1 g8f6 d2d3 d7d6 c2c3 a7a6
FEN: r1bqk2r/1pp2ppp/p1np1n2/2b1p3/2B1P3/2PP1N2/PP3PPP/RNBQ1RK1 w kq –

ECO: C54
Opening Name: Italian Game: Classical Variation, Giuoco Pianissimo, Albin Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 d6 6. b4
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 g8f6 d2d3 d7d6 b2b4
FEN: r1bqk2r/ppp2ppp/2np1n2/2b1p3/1PB1P3/2PP1N2/P4PPP/RNBQK2R b KQkq –

ECO: C54
Opening Name: Italian Game: Classical Variation, Giuoco Pianissimo, Main Line
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 d6 6. O-O O-O 7. Re1 a6 8. Bb3 Ba7 9. h3
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 g8f6 d2d3 d7d6 e1g1 e8g8 f1e1 a7a6 c4b3 c5a7 h2h3
FEN: r1bq1rk1/bpp2ppp/p1np1n2/4p3/4P3/1BPP1N1P/PP3PP1/RNBQR1K1 b – –

ECO: C54
Opening Name: Italian Game: Classical Variation, Giuoco Pianissimo, with a5
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. O-O Nf6 5. d3 a5 6. c3
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 e1g1 g8f6 d2d3 a7a5 c2c3
FEN: r1bqk2r/1ppp1ppp/2n2n2/p1b1p3/2B1P3/2PP1N2/PP3PPP/RNBQ1RK1 b kq –

ECO: C54
Opening Name: Italian Game: Classical Variation, Giuoco Pianissimo, with a6
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 a6
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 g8f6 d2d3 a7a6
FEN: r1bqk2r/1ppp1ppp/p1n2n2/2b1p3/2B1P3/2PP1N2/PP3PPP/RNBQK2R w KQkq –

ECO: C54
Opening Name: Italian Game: Classical Variation, Giuoco Pianissimo, with a6
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 d6 6. Nbd2 a6
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 g8f6 d2d3 d7d6 b1d2 a7a6
FEN: r1bqk2r/1pp2ppp/p1np1n2/2b1p3/2B1P3/2PP1N2/PP1N1PPP/R1BQK2R w KQkq –

ECO: C54
Opening Name: Italian Game: Classical Variation, Giuoco Pianissimo, with d6
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 d6
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 g8f6 d2d3 d7d6
FEN: r1bqk2r/ppp2ppp/2np1n2/2b1p3/2B1P3/2PP1N2/PP3PPP/RNBQK2R w KQkq –

ECO: C54
Opening Name: Italian Game: Classical Variation, Giuoco Pianissimo, with h6
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. O-O Nf6 5. d3 h6
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 e1g1 g8f6 d2d3 h7h6
FEN: r1bqk2r/pppp1pp1/2n2n1p/2b1p3/2B1P3/3P1N2/PPP2PPP/RNBQ1RK1 w kq –

ECO: C54
Opening Name: Italian Game: Classical Variation, Giuoco Pianissimo, with h6
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. O-O Nf6 5. d3 h6 6. c3 d6
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 e1g1 g8f6 d2d3 h7h6 c2c3 d7d6
FEN: r1bqk2r/ppp2pp1/2np1n1p/2b1p3/2B1P3/2PP1N2/PP3PPP/RNBQ1RK1 w kq –

ECO: C54
Opening Name: Italian Game: Classical Variation, Greco Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Bc5 5. c3 Nf6 6. e5 d5
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f1c4 f8c5 c2c3 g8f6 e4e5 d7d5
FEN: r1bqk2r/ppp2ppp/2n2n2/2bpP3/2Bp4/2P2N2/PP3PPP/RNBQK2R w KQkq d6

ECO: C54
Opening Name: Italian Game: Classical Variation, Greco Gambit, Anderssen Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. e5 d5 7. Bb5 Ne4 8. cxd4 Bb4+
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 g8f6 d2d4 e5d4 e4e5 d7d5 c4b5 f6e4 c3d4 c5b4
FEN: r1bqk2r/ppp2ppp/2n5/1B1pP3/1b1Pn3/5N2/PP3PPP/RNBQK2R w KQkq –

ECO: C54
Opening Name: Italian Game: Classical Variation, Greco Gambit, Greco Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Nc3 Nxe4 8. O-O Nxc3
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 g8f6 d2d4 e5d4 c3d4 c5b4 b1c3 f6e4 e1g1 e4c3
FEN: r1bqk2r/pppp1ppp/2n5/8/1bBP4/2n2N2/PP3PPP/R1BQ1RK1 w kq –

ECO: C54
Opening Name: Italian Game: Classical Variation, Greco Gambit, Main Line
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Nc3 Nxe4 8. O-O Bxc3
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 g8f6 d2d4 e5d4 c3d4 c5b4 b1c3 f6e4 e1g1 b4c3
FEN: r1bqk2r/pppp1ppp/2n5/8/2BPn3/2b2N2/PP3PPP/R1BQ1RK1 w kq –

ECO: C54
Opening Name: Italian Game: Classical Variation, Greco Gambit, Moeller-Bayonet Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Nc3 Nxe4 8. O-O Bxc3 9. d5 Bf6 10. Re1 Ne7 11. Rxe4 d6 12. g4
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 g8f6 d2d4 e5d4 c3d4 c5b4 b1c3 f6e4 e1g1 b4c3 d4d5 c3f6 f1e1 c6e7 e1e4 d7d6 g2g4
FEN: r1bqk2r/ppp1nppp/3p1b2/3P4/2B1R1P1/5N2/PP3P1P/R1BQ2K1 b kq –

ECO: C54
Opening Name: Italian Game: Classical Variation, Greco Gambit, Moeller-Therkatz Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Nc3 Nxe4 8. O-O Bxc3 9. d5
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 g8f6 d2d4 e5d4 c3d4 c5b4 b1c3 f6e4 e1g1 b4c3 d4d5
FEN: r1bqk2r/pppp1ppp/2n5/3P4/2B1n3/2b2N2/PP3PPP/R1BQ1RK1 b kq –

ECO: C54
Opening Name: Italian Game: Classical Variation, Greco Gambit, Traditional Line
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 g8f6 d2d4 e5d4 c3d4
FEN: r1bqk2r/pppp1ppp/2n2n2/2b5/2BPP3/5N2/PP3PPP/RNBQK2R b KQkq –

ECO: C54
Opening Name: Italian Game: Giuoco Piano, Aitken Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Nc3 Nxe4 8. O-O Nxc3 9. bxc3 Bxc3 10. Ba3
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 g8f6 d2d4 e5d4 c3d4 c5b4 b1c3 f6e4 e1g1 e4c3 b2c3 b4c3 c1a3
FEN: r1bqk2r/pppp1ppp/2n5/8/2BP4/B1b2N2/P4PPP/R2Q1RK1 b kq –

ECO: C54
Opening Name: Italian Game: Giuoco Piano, Bernstein Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Nc3 Nxe4 8. O-O Nxc3 9. bxc3 Bxc3 10. Qb3 d5
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 g8f6 d2d4 e5d4 c3d4 c5b4 b1c3 f6e4 e1g1 e4c3 b2c3 b4c3 d1b3 d7d5
FEN: r1bqk2r/ppp2ppp/2n5/3p4/2BP4/1Qb2N2/P4PPP/R1B2RK1 w kq –

ECO: C54
Opening Name: Italian Game: Giuoco Piano, Cracow Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Kf1
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 g8f6 d2d4 e5d4 c3d4 c5b4 e1f1
FEN: r1bqk2r/pppp1ppp/2n2n2/8/1bBPP3/5N2/PP3PPP/RNBQ1K1R b kq –

ECO: C54
Opening Name: Italian Game: Giuoco Piano, Greco’s Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Nc3
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 g8f6 d2d4 e5d4 c3d4 c5b4 b1c3
FEN: r1bqk2r/pppp1ppp/2n2n2/8/1bBPP3/2N2N2/PP3PPP/R1BQK2R b KQkq –

ECO: C54
Opening Name: Italian Game: Giuoco Piano, Holzhausen Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. O-O Bc5 5. d4 Bxd4 6. Nxd4 Nxd4 7. Bg5 d6 8. f4 Qe7 9. fxe5 dxe5 10. Nc3
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 e1g1 f8c5 d2d4 c5d4 f3d4 c6d4 c1g5 d7d6 f2f4 d8e7 f4e5 d6e5 b1c3
FEN: r1b1k2r/ppp1qppp/5n2/4p1B1/2BnP3/2N5/PPP3PP/R2Q1RK1 b kq –

ECO: C54
Opening Name: Italian Game: Giuoco Piano, Krause Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Bd2 Nxe4 8. Bxb4 Nxb4 9. Bxf7+ Kxf7 10. Qb3+ d5 11. Ne5+ Kf6 12. f3
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 g8f6 d2d4 e5d4 c3d4 c5b4 c1d2 f6e4 d2b4 c6b4 c4f7 e8f7 d1b3 d7d5 f3e5 f7f6 f2f3
FEN: r1bq3r/ppp3pp/5k2/3pN3/1n1Pn3/1Q3P2/PP4PP/RN2K2R b KQ –

ECO: C54
Opening Name: Italian Game: Giuoco Piano, Rosentreter Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. O-O Bc5 5. d4 Bxd4 6. Nxd4 Nxd4 7. Bg5 h6 8. Bh4 g5 9. f4
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 e1g1 f8c5 d2d4 c5d4 f3d4 c6d4 c1g5 h7h6 g5h4 g7g5 f2f4
FEN: r1bqk2r/pppp1p2/5n1p/4p1p1/2BnPP1B/8/PPP3PP/RN1Q1RK1 b kq –

ECO: C54
Opening Name: Italian Game: Giuoco Piano, Steinitz Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Nc3 Nxe4 8. O-O Bxc3 9. bxc3 d5 10. Ba3
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 g8f6 d2d4 e5d4 c3d4 c5b4 b1c3 f6e4 e1g1 b4c3 b2c3 d7d5 c1a3
FEN: r1bqk2r/ppp2ppp/2n5/3p4/2BPn3/B1P2N2/P4PPP/R2Q1RK1 b kq –

ECO: C54
Opening Name: Italian Game: Giuoco Piano, Therkatz-Herzog Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Nc3 Nxe4 8. O-O Bxc3 9. d5 Bf6 10. Re1 Ne7 11. Rxe4 d6 12. Bg5 Bxg5 13. Nxg5 O-O 14. Nxh7
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 g8f6 d2d4 e5d4 c3d4 c5b4 b1c3 f6e4 e1g1 b4c3 d4d5 c3f6 f1e1 c6e7 e1e4 d7d6 c1g5 f6g5 f3g5 e8g8 g5h7
FEN: r1bq1rk1/ppp1nppN/3p4/3P4/2B1R3/8/PP3PPP/R2Q2K1 b – –

ECO: C55
Opening Name: Italian Game: Two Knights Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6
FEN: r1bqkb1r/pppp1ppp/2n2n2/4p3/2B1P3/5N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: C55
Opening Name: Italian Game: Two Knights Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. O-O Bc5 5. d4 Bxd4 6. Nxd4 Nxd4 7. Bg5 d6
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 e1g1 f8c5 d2d4 c5d4 f3d4 c6d4 c1g5 d7d6
FEN: r1bqk2r/ppp2ppp/3p1n2/4p1B1/2BnP3/8/PPP2PPP/RN1Q1RK1 w kq –

ECO: C55
Opening Name: Italian Game: Two Knights Defense, Modern Bishop’s Opening
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 d2d3
FEN: r1bqkb1r/pppp1ppp/2n2n2/4p3/2B1P3/3P1N2/PPP2PPP/RNBQK2R b KQkq –

ECO: C55
Opening Name: Italian Game: Two Knights Defense, Modern Bishop’s Opening
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Be7
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 d2d3 f8e7
FEN: r1bqk2r/ppppbppp/2n2n2/4p3/2B1P3/3P1N2/PPP2PPP/RNBQK2R w KQkq –

ECO: C56
Opening Name: Italian Game: Scotch Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. O-O
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 d2d4 e5d4 e1g1
FEN: r1bqkb1r/pppp1ppp/2n2n2/8/2BpP3/5N2/PPP2PPP/RNBQ1RK1 b kq –

ECO: C56
Opening Name: Italian Game: Scotch Gambit, Anderssen Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. O-O Nxe4 6. Re1 d5 7. Bxd5 Qxd5 8. Nc3
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 d2d4 e5d4 e1g1 f6e4 f1e1 d7d5 c4d5 d8d5 b1c3
FEN: r1b1kb1r/ppp2ppp/2n5/3q4/3pn3/2N2N2/PPP2PPP/R1BQR1K1 b kq –

ECO: C56
Opening Name: Italian Game: Scotch Gambit, Anderssen Attack, Main Line
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. O-O Nxe4 6. Re1 d5 7. Bxd5 Qxd5 8. Nc3 Qa5 9. Nxe4 Be6 10. Bd2 Qd5 11. Bg5
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 d2d4 e5d4 e1g1 f6e4 f1e1 d7d5 c4d5 d8d5 b1c3 d5a5 c3e4 c8e6 c1d2 a5d5 d2g5
FEN: r3kb1r/ppp2ppp/2n1b3/3q2B1/3pN3/5N2/PPP2PPP/R2QR1K1 b kq –

ECO: C56
Opening Name: Italian Game: Scotch Gambit, Canal Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Nf6 5. O-O Nxe4 6. Re1 d5 7. Nc3
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f1c4 g8f6 e1g1 f6e4 f1e1 d7d5 b1c3
FEN: r1bqkb1r/ppp2ppp/2n5/3p4/2Bpn3/2N2N2/PPP2PPP/R1BQR1K1 b kq –

ECO: C56
Opening Name: Italian Game: Scotch Gambit, Double Gambit Accepted
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. O-O Nxe4
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 d2d4 e5d4 e1g1 f6e4
FEN: r1bqkb1r/pppp1ppp/2n5/8/2Bpn3/5N2/PPP2PPP/RNBQ1RK1 w kq –

ECO: C56
Opening Name: Italian Game: Scotch Gambit, Janowski Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Nf6 5. O-O d6
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f1c4 g8f6 e1g1 d7d6
FEN: r1bqkb1r/ppp2ppp/2np1n2/8/2BpP3/5N2/PPP2PPP/RNBQ1RK1 w kq –

ECO: C56
Opening Name: Italian Game: Scotch Gambit, Max Lange Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Nf6 5. O-O Bc5
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f1c4 g8f6 e1g1 f8c5
FEN: r1bqk2r/pppp1ppp/2n2n2/2b5/2BpP3/5N2/PPP2PPP/RNBQ1RK1 w kq –

ECO: C56
Opening Name: Italian Game: Scotch Gambit, Max Lange Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. e5 d5 6. Bb5 Ne4
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 d2d4 e5d4 e4e5 d7d5 c4b5 f6e4
FEN: r1bqkb1r/ppp2ppp/2n5/1B1pP3/3pn3/5N2/PPP2PPP/RNBQK2R w KQkq –

ECO: C56
Opening Name: Italian Game: Scotch Gambit, Max Lange Attack Accepted
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. O-O Nf6 5. d4 exd4 6. e5 d5 7. exf6 dxc4 8. Re1+ Be6 9. fxg7
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 e1g1 g8f6 d2d4 e5d4 e4e5 d7d5 e5f6 d5c4 f1e1 c8e6 f6g7
FEN: r2qk2r/ppp2pPp/2n1b3/2b5/2pp4/5N2/PPP2PPP/RNBQR1K1 b kq –

ECO: C56
Opening Name: Italian Game: Scotch Gambit, Max Lange Attack, Long Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Nf6 5. O-O Bc5 6. e5 d5 7. exf6 dxc4 8. Re1+ Be6 9. Ng5 Qd5 10. Nc3 Qf5 11. Nce4
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f1c4 g8f6 e1g1 f8c5 e4e5 d7d5 e5f6 d5c4 f1e1 c8e6 f3g5 d8d5 b1c3 d5f5 c3e4
FEN: r3k2r/ppp2ppp/2n1bP2/2b2qN1/2ppN3/8/PPP2PPP/R1BQR1K1 b kq –

ECO: C56
Opening Name: Italian Game: Scotch Gambit, Max Lange Attack, Spielmann Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Nf6 5. O-O Bc5 6. e5 Ng4
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f1c4 g8f6 e1g1 f8c5 e4e5 f6g4
FEN: r1bqk2r/pppp1ppp/2n5/2b1P3/2Bp2n1/5N2/PPP2PPP/RNBQ1RK1 w kq –

ECO: C56
Opening Name: Italian Game: Scotch Gambit, Nakhmanson Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. O-O Nxe4 6. Nc3
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 d2d4 e5d4 e1g1 f6e4 b1c3
FEN: r1bqkb1r/pppp1ppp/2n5/8/2Bpn3/2N2N2/PPP2PPP/R1BQ1RK1 b kq –

ECO: C56
Opening Name: Italian Game: Scotch Gambit, Walbrodt-Baird Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. O-O
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c2c3 g8f6 d2d4 e5d4 e1g1
FEN: r1bqk2r/pppp1ppp/2n2n2/2b5/2BpP3/2P2N2/PP3PPP/RNBQ1RK1 b kq –

ECO: C56
Opening Name: Italian Game: Scotch Gambit, de Riviere Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Nf6 5. O-O Be7
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f1c4 g8f6 e1g1 f8e7
FEN: r1bqk2r/ppppbppp/2n2n2/8/2BpP3/5N2/PPP2PPP/RNBQ1RK1 w kq –

ECO: C56
Opening Name: Italian Game: Scotch Invitation Declined
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 d6
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 d2d4 d7d6
FEN: r1bqkb1r/ppp2ppp/2np1n2/4p3/2BPP3/5N2/PPP2PPP/RNBQK2R w KQkq –

ECO: C56
Opening Name: Italian Game: Two Knights Defense, Keidansky Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. e5 d5 6. Bb5 Ne4 7. Nxd4 Bc5 8. Nxc6 Bxf2+ 9. Kf1 Qh4
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 d2d4 e5d4 e4e5 d7d5 c4b5 f6e4 f3d4 f8c5 d4c6 c5f2 e1f1 d8h4
FEN: r1b1k2r/ppp2ppp/2N5/1B1pP3/4n2q/8/PPP2bPP/RNBQ1K1R w kq –

ECO: C56
Opening Name: Italian Game: Two Knights Defense, Max Lange Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Nf6 5. O-O Bc5 6. e5
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f1c4 g8f6 e1g1 f8c5 e4e5
FEN: r1bqk2r/pppp1ppp/2n2n2/2b1P3/2Bp4/5N2/PPP2PPP/RNBQ1RK1 b kq –

ECO: C56
Opening Name: Italian Game: Two Knights Defense, Max Lange Attack, Berger Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. O-O Bc5 6. e5 d5 7. exf6 dxc4 8. Re1+ Be6 9. Ng5 Qd5 10. Nc3 Qf5 11. g4 Qg6 12. Nce4 Bb6 13. f4 O-O-O
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 d2d4 e5d4 e1g1 f8c5 e4e5 d7d5 e5f6 d5c4 f1e1 c8e6 f3g5 d8d5 b1c3 d5f5 g2g4 f5g6 c3e4 c5b6 f2f4 e8c8
FEN: 2kr3r/ppp2ppp/1bn1bPq1/6N1/2ppNPP1/8/PPP4P/R1BQR1K1 w – –

ECO: C56
Opening Name: Italian Game: Two Knights Defense, Max Lange Attack, Krause Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. O-O Bc5 6. e5 Ng4 7. c3
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 d2d4 e5d4 e1g1 f8c5 e4e5 f6g4 c2c3
FEN: r1bqk2r/pppp1ppp/2n5/2b1P3/2Bp2n1/2P2N2/PP3PPP/RNBQ1RK1 b kq –

ECO: C56
Opening Name: Italian Game: Two Knights Defense, Max Lange Attack, Loman Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Bc5 5. O-O Nf6 6. e5 d5 7. exf6 dxc4 8. Re1+ Be6 9. Ng5 g6
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f1c4 f8c5 e1g1 g8f6 e4e5 d7d5 e5f6 d5c4 f1e1 c8e6 f3g5 g7g6
FEN: r2qk2r/ppp2p1p/2n1bPp1/2b3N1/2pp4/8/PPP2PPP/RNBQR1K1 w kq –

ECO: C56
Opening Name: Italian Game: Two Knights Defense, Max Lange Attack, Rubinstein Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. O-O Bc5 6. e5 d5 7. exf6 dxc4 8. Re1+ Be6 9. Ng5 Qd5 10. Nc3 Qf5 11. Nce4 Bf8
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 d2d4 e5d4 e1g1 f8c5 e4e5 d7d5 e5f6 d5c4 f1e1 c8e6 f3g5 d8d5 b1c3 d5f5 c3e4 c5f8
FEN: r3kb1r/ppp2ppp/2n1bP2/5qN1/2ppN3/8/PPP2PPP/R1BQR1K1 w kq –

ECO: C56
Opening Name: Italian Game: Two Knights Defense, Open Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 d2d4
FEN: r1bqkb1r/pppp1ppp/2n2n2/4p3/2BPP3/5N2/PPP2PPP/RNBQK2R b KQkq –

ECO: C56
Opening Name: Italian Game: Two Knights Defense, Perreux Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. Ng5
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 d2d4 e5d4 f3g5
FEN: r1bqkb1r/pppp1ppp/2n2n2/6N1/2BpP3/8/PPP2PPP/RNBQK2R b KQkq –

ECO: C56
Opening Name: Italian Game: Two Knights Defense, Yurdansky Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Nf6 5. O-O Nxe4 6. Re1 d5 7. Bxd5 Qxd5 8. Nc3 Qa5 9. Nxe4 Be6 10. Bg5 h6 11. Bh4 g5 12. Nf6+ Ke7 13. b4
UCI: e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f1c4 g8f6 e1g1 f6e4 f1e1 d7d5 c4d5 d8d5 b1c3 d5a5 c3e4 c8e6 c1g5 h7h6 g5h4 g7g5 e4f6 e8e7 b2b4
FEN: r4b1r/ppp1kp2/2n1bN1p/q5p1/1P1p3B/5N2/P1P2PPP/R2QR1K1 b – –

ECO: C57
Opening Name: Italian Game: Two Knights Defense, Fegatello Attack, Leonhardt Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Nxd5 6. Nxf7 Kxf7 7. Qf3+ Ke6 8. Nc3 Nb4 9. Qe4 c6 10. a3 Na6 11. d4 Nc7
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 f6d5 g5f7 e8f7 d1f3 f7e6 b1c3 c6b4 f3e4 c7c6 a2a3 b4a6 d2d4 a6c7
FEN: r1bq1b1r/ppn3pp/2p1k3/3np3/2BPQ3/P1N5/1PP2PPP/R1B1K2R w KQ –

ECO: C57
Opening Name: Italian Game: Two Knights Defense, Fried Liver Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Nxd5 6. Nxf7
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 f6d5 g5f7
FEN: r1bqkb1r/ppp2Npp/2n5/3np3/2B5/8/PPPP1PPP/RNBQK2R b KQkq –

ECO: C57
Opening Name: Italian Game: Two Knights Defense, Fritz Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Nd4
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6d4
FEN: r1bqkb1r/ppp2ppp/5n2/3Pp1N1/2Bn4/8/PPPP1PPP/RNBQK2R w KQkq –

ECO: C57
Opening Name: Italian Game: Two Knights Defense, Fritz, Gruber Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Nd4 6. c3 b5 7. Bf1 Nxd5 8. Ne4
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6d4 c2c3 b7b5 c4f1 f6d5 g5e4
FEN: r1bqkb1r/p1p2ppp/8/1p1np3/3nN3/2P5/PP1P1PPP/RNBQKB1R b KQkq –

ECO: C57
Opening Name: Italian Game: Two Knights Defense, Kloss Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Nb4
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6b4
FEN: r1bqkb1r/ppp2ppp/5n2/3Pp1N1/1nB5/8/PPPP1PPP/RNBQK2R w KQkq –

ECO: C57
Opening Name: Italian Game: Two Knights Defense, Knight Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5
FEN: r1bqkb1r/pppp1ppp/2n2n2/4p1N1/2B1P3/8/PPPP1PPP/RNBQK2R b KQkq –

ECO: C57
Opening Name: Italian Game: Two Knights Defense, Knight Attack, Normal Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5
FEN: r1bqkb1r/ppp2ppp/2n2n2/3pp1N1/2B1P3/8/PPPP1PPP/RNBQK2R w KQkq –

ECO: C57
Opening Name: Italian Game: Two Knights Defense, Lolli Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Nxd5 6. d4
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 f6d5 d2d4
FEN: r1bqkb1r/ppp2ppp/2n5/3np1N1/2BP4/8/PPP2PPP/RNBQK2R b KQkq –

ECO: C57
Opening Name: Italian Game: Two Knights Defense, Pincus Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Nxd5 6. d4 Bb4+
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 f6d5 d2d4 f8b4
FEN: r1bqk2r/ppp2ppp/2n5/3np1N1/1bBP4/8/PPP2PPP/RNBQK2R w KQkq –

ECO: C57
Opening Name: Italian Game: Two Knights Defense, Ponziani-Steinitz Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 Nxe4
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 f6e4
FEN: r1bqkb1r/pppp1ppp/2n5/4p1N1/2B1n3/8/PPPP1PPP/RNBQK2R w KQkq –

ECO: C57
Opening Name: Italian Game: Two Knights Defense, Traxler Counterattack
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 Bc5
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 f8c5
FEN: r1bqk2r/pppp1ppp/2n2n2/2b1p1N1/2B1P3/8/PPPP1PPP/RNBQK2R w KQkq –

ECO: C57
Opening Name: Italian Game: Two Knights Defense, Traxler Counterattack, Bishop Sacrifice Line
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 Bc5 5. Bxf7+
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 f8c5 c4f7
FEN: r1bqk2r/pppp1Bpp/2n2n2/2b1p1N1/4P3/8/PPPP1PPP/RNBQK2R b KQkq –

ECO: C57
Opening Name: Italian Game: Two Knights Defense, Traxler Counterattack, King March Line
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 Bc5 5. Nxf7 Bxf2+ 6. Kxf2 Nxe4+ 7. Ke3
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 f8c5 g5f7 c5f2 e1f2 f6e4 f2e3
FEN: r1bqk2r/pppp1Npp/2n5/4p3/2B1n3/4K3/PPPP2PP/RNBQ3R b kq –

ECO: C57
Opening Name: Italian Game: Two Knights Defense, Traxler Counterattack, Knight Sacrifice Line
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 Bc5 5. Nxf7
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 f8c5 g5f7
FEN: r1bqk2r/pppp1Npp/2n2n2/2b1p3/2B1P3/8/PPPP1PPP/RNBQK2R b KQkq –

ECO: C57
Opening Name: Italian Game: Two Knights Defense, Traxler Variation, Trencianske-Teplice Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 Bc5 5. Bxf7+ Ke7 6. d4
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 f8c5 c4f7 e8e7 d2d4
FEN: r1bq3r/ppppkBpp/2n2n2/2b1p1N1/3PP3/8/PPP2PPP/RNBQK2R b KQ –

ECO: C57
Opening Name: Italian Game: Two Knights Defense, Ulvestad Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 b5
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 b7b5
FEN: r1bqkb1r/p1p2ppp/2n2n2/1p1Pp1N1/2B5/8/PPPP1PPP/RNBQK2R w KQkq –

ECO: C57
Opening Name: Italian Game: Two Knights Defense, Ulvestad Variation, Kurkin Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 b5 6. Bf1 h6 7. Nxf7
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 b7b5 c4f1 h7h6 g5f7
FEN: r1bqkb1r/p1p2Np1/2n2n1p/1p1Pp3/8/8/PPPP1PPP/RNBQKB1R b KQkq –

ECO: C58
Opening Name: Italian Game: Two Knights Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 bxc6 8. Be2
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6a5 c4b5 c7c6 d5c6 b7c6 b5e2
FEN: r1bqkb1r/p4ppp/2p2n2/n3p1N1/8/8/PPPPBPPP/RNBQK2R b KQkq –

ECO: C58
Opening Name: Italian Game: Two Knights Defense, Blackburne Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 bxc6 8. Qf3 cxb5
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6a5 c4b5 c7c6 d5c6 b7c6 d1f3 c6b5
FEN: r1bqkb1r/p4ppp/5n2/np2p1N1/8/5Q2/PPPP1PPP/RNB1K2R w KQkq –

ECO: C58
Opening Name: Italian Game: Two Knights Defense, Colman Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 bxc6 8. Qf3 Rb8
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6a5 c4b5 c7c6 d5c6 b7c6 d1f3 a8b8
FEN: 1rbqkb1r/p4ppp/2p2n2/nB2p1N1/8/5Q2/PPPP1PPP/RNB1K2R w KQk –

ECO: C58
Opening Name: Italian Game: Two Knights Defense, Maróczy Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. d3 h6 7. Nf3 e4 8. Qe2 Nxc4 9. dxc4 Be7
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6a5 d2d3 h7h6 g5f3 e5e4 d1e2 a5c4 d3c4 f8e7
FEN: r1bqk2r/ppp1bpp1/5n1p/3P4/2P1p3/5N2/PPP1QPPP/RNB1K2R w KQkq –

ECO: C58
Opening Name: Italian Game: Two Knights Defense, Paoli Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 bxc6 8. Qf3 Qc7 9. Bd3
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6a5 c4b5 c7c6 d5c6 b7c6 d1f3 d8c7 b5d3
FEN: r1b1kb1r/p1q2ppp/2p2n2/n3p1N1/8/3B1Q2/PPPP1PPP/RNB1K2R b KQkq –

ECO: C58
Opening Name: Italian Game: Two Knights Defense, Polerio Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6a5
FEN: r1bqkb1r/ppp2ppp/5n2/n2Pp1N1/2B5/8/PPPP1PPP/RNBQK2R w KQkq –

ECO: C58
Opening Name: Italian Game: Two Knights Defense, Polerio Defense, Bishop Check Line
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6a5 c4b5
FEN: r1bqkb1r/ppp2ppp/5n2/nB1Pp1N1/8/8/PPPP1PPP/RNBQK2R b KQkq –

ECO: C58
Opening Name: Italian Game: Two Knights Defense, Polerio Defense, Bogoljubow Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 bxc6 8. Qf3
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6a5 c4b5 c7c6 d5c6 b7c6 d1f3
FEN: r1bqkb1r/p4ppp/2p2n2/nB2p1N1/8/5Q2/PPPP1PPP/RNB1K2R b KQkq –

ECO: C58
Opening Name: Italian Game: Two Knights Defense, Polerio Defense, Kieseritzky Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. d3
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6a5 d2d3
FEN: r1bqkb1r/ppp2ppp/5n2/n2Pp1N1/2B5/3P4/PPP2PPP/RNBQK2R b KQkq –

ECO: C58
Opening Name: Italian Game: Two Knights Defense, Polerio Defense, Yankovich Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. d3 h6 7. Nf3 e4 8. Qe2 Nxc4 9. dxc4 Bc5 10. Nfd2
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6a5 d2d3 h7h6 g5f3 e5e4 d1e2 a5c4 d3c4 f8c5 f3d2
FEN: r1bqk2r/ppp2pp1/5n1p/2bP4/2P1p3/8/PPPNQPPP/RNB1K2R b KQkq –

ECO: C59
Opening Name: Italian Game: Two Knights Defense, Knorre Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 bxc6 8. Be2 h6 9. Nf3 e4 10. Ne5 Bd6 11. d4 Qc7 12. Bd2
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6a5 c4b5 c7c6 d5c6 b7c6 b5e2 h7h6 g5f3 e5e4 f3e5 f8d6 d2d4 d8c7 c1d2
FEN: r1b1k2r/p1q2pp1/2pb1n1p/n3N3/3Pp3/8/PPPBBPPP/RN1QK2R b KQkq –

ECO: C59
Opening Name: Italian Game: Two Knights Defense, Polerio Defense, Göring Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 bxc6 8. Be2 h6 9. Nf3 e4 10. Ne5 Qc7
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6a5 c4b5 c7c6 d5c6 b7c6 b5e2 h7h6 g5f3 e5e4 f3e5 d8c7
FEN: r1b1kb1r/p1q2pp1/2p2n1p/n3N3/4p3/8/PPPPBPPP/RNBQK2R w KQkq –

ECO: C59
Opening Name: Italian Game: Two Knights Defense, Polerio Defense, Suhle Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 bxc6 8. Be2 h6
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6a5 c4b5 c7c6 d5c6 b7c6 b5e2 h7h6
FEN: r1bqkb1r/p4pp1/2p2n1p/n3p1N1/8/8/PPPPBPPP/RNBQK2R w KQkq –

ECO: C59
Opening Name: Italian Game: Two Knights Defense, Steinitz Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 bxc6 8. Be2 h6 9. Nh3
UCI: e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6a5 c4b5 c7c6 d5c6 b7c6 b5e2 h7h6 g5h3
FEN: r1bqkb1r/p4pp1/2p2n1p/n3p3/8/7N/PPPPBPPP/RNBQK2R b KQkq –

ECO: C60
Opening Name: Ruy Lopez
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5
FEN: r1bqkbnr/pppp1ppp/2n5/1B2p3/4P3/5N2/PPPP1PPP/RNBQK2R b KQkq –

ECO: C60
Opening Name: Ruy Lopez: Alapin Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Bb4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 f8b4
FEN: r1bqk1nr/pppp1ppp/2n5/1B2p3/1b2P3/5N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: C60
Opening Name: Ruy Lopez: Alapin Defense, Alapin Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Bb4 4. c3 Ba5 5. Bxc6 dxc6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 f8b4 c2c3 b4a5 b5c6 d7c6
FEN: r1bqk1nr/ppp2ppp/2p5/b3p3/4P3/2P2N2/PP1P1PPP/RNBQK2R w KQkq –

ECO: C60
Opening Name: Ruy Lopez: Brentano Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 g5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g7g5
FEN: r1bqkbnr/pppp1p1p/2n5/1B2p1p1/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: C60
Opening Name: Ruy Lopez: Bulgarian Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a5
FEN: r1bqkbnr/1ppp1ppp/2n5/pB2p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: C60
Opening Name: Ruy Lopez: Cozio Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nge7
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g8e7
FEN: r1bqkb1r/ppppnppp/2n5/1B2p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: C60
Opening Name: Ruy Lopez: Cozio Defense, Paulsen Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nge7 4. Nc3 g6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g8e7 b1c3 g7g6
FEN: r1bqkb1r/ppppnp1p/2n3p1/1B2p3/4P3/2N2N2/PPPP1PPP/R1BQK2R w KQkq –

ECO: C60
Opening Name: Ruy Lopez: Cozio Defense, Tartakower Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 g6 4. d4 exd4 5. Nxd4 Bg7 6. Be3 Nge7 7. Nc3 O-O 8. Qd2 d5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g7g6 d2d4 e5d4 f3d4 f8g7 c1e3 g8e7 b1c3 e8g8 d1d2 d7d5
FEN: r1bq1rk1/ppp1npbp/2n3p1/1B1p4/3NP3/2N1B3/PPPQ1PPP/R3K2R w KQ –

ECO: C60
Opening Name: Ruy Lopez: Fianchetto Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 g6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g7g6
FEN: r1bqkbnr/pppp1p1p/2n3p1/1B2p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: C60
Opening Name: Ruy Lopez: Fianchetto Defense, Kevitz Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 g6 4. c3 f5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g7g6 c2c3 f7f5
FEN: r1bqkbnr/pppp3p/2n3p1/1B2pp2/4P3/2P2N2/PP1P1PPP/RNBQK2R w KQkq –

ECO: C60
Opening Name: Ruy Lopez: Lucena Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Be7
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 f8e7
FEN: r1bqk1nr/ppppbppp/2n5/1B2p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: C60
Opening Name: Ruy Lopez: Nürnberg Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 f6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 f7f6
FEN: r1bqkbnr/pppp2pp/2n2p2/1B2p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: C60
Opening Name: Ruy Lopez: Pollock Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Na5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 c6a5
FEN: r1bqkbnr/pppp1ppp/8/nB2p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: C60
Opening Name: Ruy Lopez: Retreat Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nb8
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 c6b8
FEN: rnbqkbnr/pppp1ppp/8/1B2p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: C60
Opening Name: Ruy Lopez: Rotary-Albany Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 b6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 b7b6
FEN: r1bqkbnr/p1pp1ppp/1pn5/1B2p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: C60
Opening Name: Ruy Lopez: Spanish Countergambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 d5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 d7d5
FEN: r1bqkbnr/ppp2ppp/2n5/1B1pp3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: C60
Opening Name: Ruy Lopez: Spanish Countergambit, Harding Countergambit, Fricke Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 d5 4. Nxe5 Qg5 5. O-O
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 d7d5 f3e5 d8g5 e1g1
FEN: r1b1kbnr/ppp2ppp/2n5/1B1pN1q1/4P3/8/PPPP1PPP/RNBQ1RK1 b kq –

ECO: C60
Opening Name: Ruy Lopez: Spanish Countergambit, Harding Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 d5 4. Nxe5 Qg5 5. Nxc6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 d7d5 f3e5 d8g5 e5c6
FEN: r1b1kbnr/ppp2ppp/2N5/1B1p2q1/4P3/8/PPPP1PPP/RNBQK2R b KQkq –

ECO: C60
Opening Name: Ruy Lopez: Vinogradov Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Qe7
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 d8e7
FEN: r1b1kbnr/ppppqppp/2n5/1B2p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: C61
Opening Name: Ruy Lopez: Bird Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nd4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 c6d4
FEN: r1bqkbnr/pppp1ppp/8/1B2p3/3nP3/5N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: C61
Opening Name: Ruy Lopez: Bird Variation, Paulsen Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nd4 4. Nxd4 exd4 5. O-O Ne7
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 c6d4 f3d4 e5d4 e1g1 g8e7
FEN: r1bqkb1r/ppppnppp/8/1B6/3pP3/8/PPPP1PPP/RNBQ1RK1 w kq –

ECO: C62
Opening Name: Ruy Lopez: Old Steinitz Defense, Semi-Duras Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 d6 4. d4 Bd7 5. c4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 d7d6 d2d4 c8d7 c2c4
FEN: r2qkbnr/pppb1ppp/2np4/1B2p3/2PPP3/5N2/PP3PPP/RNBQK2R b KQkq –

ECO: C62
Opening Name: Ruy Lopez: Steinitz Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 d6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 d7d6
FEN: r1bqkbnr/ppp2ppp/2np4/1B2p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: C62
Opening Name: Ruy Lopez: Steinitz Defense, Center Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 d6 4. d4 exd4 5. O-O
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 d7d6 d2d4 e5d4 e1g1
FEN: r1bqkbnr/ppp2ppp/2np4/1B6/3pP3/5N2/PPP2PPP/RNBQ1RK1 b kq –

ECO: C62
Opening Name: Ruy Lopez: Steinitz Defense, Nimzowitsch Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 d6 4. d4 Bd7 5. Nc3 Nf6 6. Bxc6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 d7d6 d2d4 c8d7 b1c3 g8f6 b5c6
FEN: r2qkb1r/pppb1ppp/2Bp1n2/4p3/3PP3/2N2N2/PPP2PPP/R1BQK2R b KQkq –

ECO: C63
Opening Name: Ruy Lopez: Schliemann Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 f5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 f7f5
FEN: r1bqkbnr/pppp2pp/2n5/1B2pp2/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: C63
Opening Name: Ruy Lopez: Schliemann Defense, Classical Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 f5 4. Nc3 fxe4 5. Nxe4 d5 6. Nxe5 dxe4 7. Nxc6 Qg5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 f7f5 b1c3 f5e4 c3e4 d7d5 f3e5 d5e4 e5c6 d8g5
FEN: r1b1kbnr/ppp3pp/2N5/1B4q1/4p3/8/PPPP1PPP/R1BQK2R w KQkq –

ECO: C63
Opening Name: Ruy Lopez: Schliemann Defense, Dyckhoff Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 f5 4. Nc3
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 f7f5 b1c3
FEN: r1bqkbnr/pppp2pp/2n5/1B2pp2/4P3/2N2N2/PPPP1PPP/R1BQK2R b KQkq –

ECO: C63
Opening Name: Ruy Lopez: Schliemann Defense, Exchange Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 f5 4. Bxc6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 f7f5 b5c6
FEN: r1bqkbnr/pppp2pp/2B5/4pp2/4P3/5N2/PPPP1PPP/RNBQK2R b KQkq –

ECO: C63
Opening Name: Ruy Lopez: Schliemann Defense, Jaenisch Gambit Accepted
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 f5 4. exf5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 f7f5 e4f5
FEN: r1bqkbnr/pppp2pp/2n5/1B2pP2/8/5N2/PPPP1PPP/RNBQK2R b KQkq –

ECO: C63
Opening Name: Ruy Lopez: Schliemann Defense, Kostić Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 f5 4. Nc3 fxe4 5. Nxe4 Be7
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 f7f5 b1c3 f5e4 c3e4 f8e7
FEN: r1bqk1nr/ppppb1pp/2n5/1B2p3/4N3/5N2/PPPP1PPP/R1BQK2R w KQkq –

ECO: C63
Opening Name: Ruy Lopez: Schliemann Defense, Möhring Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 f5 4. Nc3 fxe4 5. Nxe4 d5 6. Nxe5 dxe4 7. Nxc6 Qd5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 f7f5 b1c3 f5e4 c3e4 d7d5 f3e5 d5e4 e5c6 d8d5
FEN: r1b1kbnr/ppp3pp/2N5/1B1q4/4p3/8/PPPP1PPP/R1BQK2R w KQkq –

ECO: C63
Opening Name: Ruy Lopez: Schliemann Defense, Schönemann Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 f5 4. d4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 f7f5 d2d4
FEN: r1bqkbnr/pppp2pp/2n5/1B2pp2/3PP3/5N2/PPP2PPP/RNBQK2R b KQkq –

ECO: C63
Opening Name: Ruy Lopez: Schliemann Defense, Tartakower Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 f5 4. Nc3 fxe4 5. Nxe4 Nf6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 f7f5 b1c3 f5e4 c3e4 g8f6
FEN: r1bqkb1r/pppp2pp/2n2n2/1B2p3/4N3/5N2/PPPP1PPP/R1BQK2R w KQkq –

ECO: C64
Opening Name: Ruy Lopez: Classical Defense, Benelux Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Bc5 5. c3 O-O 6. d4 Bb6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f8c5 c2c3 e8g8 d2d4 c5b6
FEN: r1bq1rk1/pppp1ppp/1bn2n2/1B2p3/3PP3/2P2N2/PP3PPP/RNBQ1RK1 w – –

ECO: C64
Opening Name: Ruy Lopez: Classical Defense, Boden Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. c3 Qe7
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 f8c5 c2c3 d8e7
FEN: r1b1k1nr/ppppqppp/2n5/1Bb1p3/4P3/2P2N2/PP1P1PPP/RNBQK2R w KQkq –

ECO: C64
Opening Name: Ruy Lopez: Classical Defense, Zaitsev Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. O-O Nd4 5. b4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 f8c5 e1g1 c6d4 b2b4
FEN: r1bqk1nr/pppp1ppp/8/1Bb1p3/1P1nP3/5N2/P1PP1PPP/RNBQ1RK1 b kq –

ECO: C64
Opening Name: Ruy Lopez: Classical Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 f8c5
FEN: r1bqk1nr/pppp1ppp/2n5/1Bb1p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: C64
Opening Name: Ruy Lopez: Classical Variation, Central Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. c3
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 f8c5 c2c3
FEN: r1bqk1nr/pppp1ppp/2n5/1Bb1p3/4P3/2P2N2/PP1P1PPP/RNBQK2R b KQkq –

ECO: C64
Opening Name: Ruy Lopez: Classical Variation, Charousek Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. c3 Bb6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 f8c5 c2c3 c5b6
FEN: r1bqk1nr/pppp1ppp/1bn5/1B2p3/4P3/2P2N2/PP1P1PPP/RNBQK2R w KQkq –

ECO: C64
Opening Name: Ruy Lopez: Classical Variation, Cordel Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. c3 f5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 f8c5 c2c3 f7f5
FEN: r1bqk1nr/pppp2pp/2n5/1Bb1pp2/4P3/2P2N2/PP1P1PPP/RNBQK2R w KQkq –

ECO: C64
Opening Name: Ruy Lopez: Classical Variation, Konikowski Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. c3 d5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 f8c5 c2c3 d7d5
FEN: r1bqk1nr/ppp2ppp/2n5/1Bbpp3/4P3/2P2N2/PP1P1PPP/RNBQK2R w KQkq –

ECO: C64
Opening Name: Ruy Lopez: Classical Variation, Modern Main Line
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Bc5 5. c3 O-O 6. d4 Bb6 7. Bg5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f8c5 c2c3 e8g8 d2d4 c5b6 c1g5
FEN: r1bq1rk1/pppp1ppp/1bn2n2/1B2p1B1/3PP3/2P2N2/PP3PPP/RN1Q1RK1 b – –

ECO: C64
Opening Name: Ruy Lopez: Classical Variation, Spanish Wing Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. b4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 f8c5 b2b4
FEN: r1bqk1nr/pppp1ppp/2n5/1Bb1p3/1P2P3/5N2/P1PP1PPP/RNBQK2R b KQkq –

ECO: C65
Opening Name: Ruy Lopez: Berlin Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g8f6
FEN: r1bqkb1r/pppp1ppp/2n2n2/1B2p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: C65
Opening Name: Ruy Lopez: Berlin Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1
FEN: r1bqkb1r/pppp1ppp/2n2n2/1B2p3/4P3/5N2/PPPP1PPP/RNBQ1RK1 b kq –

ECO: C65
Opening Name: Ruy Lopez: Berlin Defense, Anderssen Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 d6 5. Bxc6+
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 d2d3 d7d6 b5c6
FEN: r1bqkb1r/ppp2ppp/2Bp1n2/4p3/4P3/3P1N2/PPP2PPP/RNBQK2R b KQkq –

ECO: C65
Opening Name: Ruy Lopez: Berlin Defense, Beverwijk Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Bc5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f8c5
FEN: r1bqk2r/pppp1ppp/2n2n2/1Bb1p3/4P3/5N2/PPPP1PPP/RNBQ1RK1 w kq –

ECO: C65
Opening Name: Ruy Lopez: Berlin Defense, Duras Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 d6 5. c4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 d2d3 d7d6 c2c4
FEN: r1bqkb1r/ppp2ppp/2np1n2/1B2p3/2P1P3/3P1N2/PP3PPP/RNBQK2R b KQkq –

ECO: C65
Opening Name: Ruy Lopez: Berlin Defense, Fishing Pole Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Ng4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6g4
FEN: r1bqkb1r/pppp1ppp/2n5/1B2p3/4P1n1/5N2/PPPP1PPP/RNBQ1RK1 w kq –

ECO: C65
Opening Name: Ruy Lopez: Berlin Defense, Kaufmann Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 Bc5 5. Be3
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 d2d3 f8c5 c1e3
FEN: r1bqk2r/pppp1ppp/2n2n2/1Bb1p3/4P3/3PBN2/PPP2PPP/RN1QK2R b KQkq –

ECO: C65
Opening Name: Ruy Lopez: Berlin Defense, Mortimer Trap
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 Ne7 5. Nxe5 c6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 d2d3 c6e7 f3e5 c7c6
FEN: r1bqkb1r/pp1pnppp/2p2n2/1B2N3/4P3/3P4/PPP2PPP/RNBQK2R w KQkq –

ECO: C65
Opening Name: Ruy Lopez: Berlin Defense, Mortimer Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 Ne7
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 d2d3 c6e7
FEN: r1bqkb1r/ppppnppp/5n2/1B2p3/4P3/3P1N2/PPP2PPP/RNBQK2R w KQkq –

ECO: C65
Opening Name: Ruy Lopez: Berlin Defense, Nyholm Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d4 exd4 5. O-O
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 d2d4 e5d4 e1g1
FEN: r1bqkb1r/pppp1ppp/2n2n2/1B6/3pP3/5N2/PPP2PPP/RNBQ1RK1 b kq –

ECO: C65
Opening Name: Ruy Lopez: Classical Variation, Zukertort Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Bc5 5. c3
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f8c5 c2c3
FEN: r1bqk2r/pppp1ppp/2n2n2/1Bb1p3/4P3/2P2N2/PP1P1PPP/RNBQ1RK1 b kq –

ECO: C65
Opening Name: Ruy Lopez: Halloween Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. Nxe5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 f3e5
FEN: r1bqkb1r/pppp1ppp/2n2n2/1B2N3/4P3/8/PPPP1PPP/RNBQK2R b KQkq –

ECO: C66
Opening Name: Ruy Lopez: Berlin Defense, Closed Bernstein Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O d6 5. d4 Bd7 6. Nc3 Be7 7. Bg5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 d7d6 d2d4 c8d7 b1c3 f8e7 c1g5
FEN: r2qk2r/pppbbppp/2np1n2/1B2p1B1/3PP3/2N2N2/PPP2PPP/R2Q1RK1 b kq –

ECO: C66
Opening Name: Ruy Lopez: Berlin Defense, Closed Showalter Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O d6 5. d4 Bd7 6. Nc3 Be7 7. Bxc6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 d7d6 d2d4 c8d7 b1c3 f8e7 b5c6
FEN: r2qk2r/pppbbppp/2Bp1n2/4p3/3PP3/2N2N2/PPP2PPP/R1BQ1RK1 b kq –

ECO: C66
Opening Name: Ruy Lopez: Berlin Defense, Closed Wolf Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O d6 5. d4 Bd7 6. Nc3 exd4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 d7d6 d2d4 c8d7 b1c3 e5d4
FEN: r2qkb1r/pppb1ppp/2np1n2/1B6/3pP3/2N2N2/PPP2PPP/R1BQ1RK1 w kq –

ECO: C66
Opening Name: Ruy Lopez: Berlin Defense, Hedgehog Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O d6 5. d4 Bd7 6. Nc3 Be7
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 d7d6 d2d4 c8d7 b1c3 f8e7
FEN: r2qk2r/pppbbppp/2np1n2/1B2p3/3PP3/2N2N2/PPP2PPP/R1BQ1RK1 w kq –

ECO: C66
Opening Name: Ruy Lopez: Berlin Defense, Improved Steinitz Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O d6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 d7d6
FEN: r1bqkb1r/ppp2ppp/2np1n2/1B2p3/4P3/5N2/PPPP1PPP/RNBQ1RK1 w kq –

ECO: C66
Opening Name: Ruy Lopez: Berlin Defense, Tarrasch Trap
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 d6 4. d4 Bd7 5. Nc3 Nf6 6. O-O Be7 7. Re1 O-O
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 d7d6 d2d4 c8d7 b1c3 g8f6 e1g1 f8e7 f1e1 e8g8
FEN: r2q1rk1/pppbbppp/2np1n2/1B2p3/3PP3/2N2N2/PPP2PPP/R1BQR1K1 w – –

ECO: C66
Opening Name: Ruy Lopez: Closed Berlin Defense, Chigorin Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O d6 5. d4 Nd7
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 d7d6 d2d4 f6d7
FEN: r1bqkb1r/pppn1ppp/2np4/1B2p3/3PP3/5N2/PPP2PPP/RNBQ1RK1 w kq –

ECO: C67
Opening Name: Ruy Lopez: Berlin Defense, Berlin Wall
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Nd6 6. Bxc6 dxc6 7. dxe5 Nf5 8. Qxd8+ Kxd8 9. Nc3 Bd7
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4 d2d4 e4d6 b5c6 d7c6 d4e5 d6f5 d1d8 e8d8 b1c3 c8d7
FEN: r2k1b1r/pppb1ppp/2p5/4Pn2/8/2N2N2/PPP2PPP/R1B2RK1 w – –

ECO: C67
Opening Name: Ruy Lopez: Berlin Defense, Cordel Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Be7 6. Qe2 Nd6 7. Bxc6 bxc6 8. dxe5 Nf5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4 d2d4 f8e7 d1e2 e4d6 b5c6 b7c6 d4e5 d6f5
FEN: r1bqk2r/p1ppbppp/2p5/4Pn2/8/5N2/PPP1QPPP/RNB2RK1 w kq –

ECO: C67
Opening Name: Ruy Lopez: Berlin Defense, Minckwitz Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Be7 6. dxe5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4 d2d4 f8e7 d4e5
FEN: r1bqk2r/ppppbppp/2n5/1B2P3/4n3/5N2/PPP2PPP/RNBQ1RK1 b kq –

ECO: C67
Opening Name: Ruy Lopez: Berlin Defense, Pillsbury Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Be7 6. Qe2 Nd6 7. Bxc6 bxc6 8. dxe5 Nb7 9. b3
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4 d2d4 f8e7 d1e2 e4d6 b5c6 b7c6 d4e5 d6b7 b2b3
FEN: r1bqk2r/pnppbppp/2p5/4P3/8/1P3N2/P1P1QPPP/RNB2RK1 b kq –

ECO: C67
Opening Name: Ruy Lopez: Berlin Defense, Rio Gambit Accepted
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4
FEN: r1bqkb1r/pppp1ppp/2n5/1B2p3/4n3/5N2/PPPP1PPP/RNBQ1RK1 w kq –

ECO: C67
Opening Name: Ruy Lopez: Berlin Defense, Rio de Janeiro Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Be7
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4 d2d4 f8e7
FEN: r1bqk2r/ppppbppp/2n5/1B2p3/3Pn3/5N2/PPP2PPP/RNBQ1RK1 w kq –

ECO: C67
Opening Name: Ruy Lopez: Berlin Defense, Rio de Janeiro Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Be7 6. Qe2 Nd6 7. Bxc6 bxc6 8. dxe5 Nb7 9. Nc3 O-O 10. Re1 Nc5 11. Nd4 Ne6 12. Be3 Nxd4 13. Bxd4 c5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4 d2d4 f8e7 d1e2 e4d6 b5c6 b7c6 d4e5 d6b7 b1c3 e8g8 f1e1 b7c5 f3d4 c5e6 c1e3 e6d4 e3d4 c6c5
FEN: r1bq1rk1/p1ppbppp/8/2p1P3/3B4/2N5/PPP1QPPP/R3R1K1 w – –

ECO: C67
Opening Name: Ruy Lopez: Berlin Defense, Rosenthal Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 a6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4 d2d4 a7a6
FEN: r1bqkb1r/1ppp1ppp/p1n5/1B2p3/3Pn3/5N2/PPP2PPP/RNBQ1RK1 w kq –

ECO: C67
Opening Name: Ruy Lopez: Berlin Defense, Trifunovic Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Be7 6. Qe2 d5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4 d2d4 f8e7 d1e2 d7d5
FEN: r1bqk2r/ppp1bppp/2n5/1B1pp3/3Pn3/5N2/PPP1QPPP/RNB2RK1 w kq –

ECO: C67
Opening Name: Ruy Lopez: Berlin Defense, Winawer Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Be7 6. Qe2 Nd6 7. Bxc6 bxc6 8. dxe5 Nb7 9. Nd4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4 d2d4 f8e7 d1e2 e4d6 b5c6 b7c6 d4e5 d6b7 f3d4
FEN: r1bqk2r/pnppbppp/2p5/4P3/3N4/8/PPP1QPPP/RNB2RK1 b kq –

ECO: C67
Opening Name: Ruy Lopez: Berlin Defense, Zukertort Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Be7 6. Qe2 Nd6 7. Bxc6 bxc6 8. dxe5 Nb7 9. c4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4 d2d4 f8e7 d1e2 e4d6 b5c6 b7c6 d4e5 d6b7 c2c4
FEN: r1bqk2r/pnppbppp/2p5/4P3/2P5/5N2/PP2QPPP/RNB2RK1 b kq –

ECO: C67
Opening Name: Ruy Lopez: Berlin Defense, l’Hermet Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Nd6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4 d2d4 e4d6
FEN: r1bqkb1r/pppp1ppp/2nn4/1B2p3/3P4/5N2/PPP2PPP/RNBQ1RK1 w kq –

ECO: C67
Opening Name: Ruy Lopez: Berlin Defense, l’Hermet Variation, Berlin Wall Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Nd6 6. Bxc6 dxc6 7. dxe5 Nf5 8. Qxd8+ Kxd8
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4 d2d4 e4d6 b5c6 d7c6 d4e5 d6f5 d1d8 e8d8
FEN: r1bk1b1r/ppp2ppp/2p5/4Pn2/8/5N2/PPP2PPP/RNB2RK1 w – –

ECO: C67
Opening Name: Ruy Lopez: Berlin Defense, l’Hermet Variation, Westerinen Line
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Nd6 6. Bxc6 dxc6 7. dxe5 Ne4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4 d2d4 e4d6 b5c6 d7c6 d4e5 d6e4
FEN: r1bqkb1r/ppp2ppp/2p5/4P3/4n3/5N2/PPP2PPP/RNBQ1RK1 w kq –

ECO: C67
Opening Name: Ruy Lopez: Open Berlin Defense, Showalter Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Nd6 6. Ba4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4 d2d4 e4d6 b5a4
FEN: r1bqkb1r/pppp1ppp/2nn4/4p3/B2P4/5N2/PPP2PPP/RNBQ1RK1 b kq –

ECO: C67
Opening Name: Ruy Lopez: Open Berlin Defense, l’Hermet Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Nd6 6. dxe5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4 d2d4 e4d6 d4e5
FEN: r1bqkb1r/pppp1ppp/2nn4/1B2P3/8/5N2/PPP2PPP/RNBQ1RK1 b kq –

ECO: C68
Opening Name: Ruy Lopez: Exchange Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5c6
FEN: r1bqkbnr/1ppp1ppp/p1B5/4p3/4P3/5N2/PPPP1PPP/RNBQK2R b KQkq –

ECO: C68
Opening Name: Ruy Lopez: Exchange Variation, Alekhine Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. d4 exd4 6. Qxd4 Qxd4 7. Nxd4 Bd6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5c6 d7c6 d2d4 e5d4 d1d4 d8d4 f3d4 f8d6
FEN: r1b1k1nr/1pp2ppp/p1pb4/8/3NP3/8/PPP2PPP/RNB1K2R w KQkq –

ECO: C68
Opening Name: Ruy Lopez: Exchange Variation, Keres Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. Nc3
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5c6 d7c6 b1c3
FEN: r1bqkbnr/1pp2ppp/p1p5/4p3/4P3/2N2N2/PPPP1PPP/R1BQK2R b KQkq –

ECO: C68
Opening Name: Ruy Lopez: Exchange Variation, Lutikov Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 bxc6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5c6 b7c6
FEN: r1bqkbnr/2pp1ppp/p1p5/4p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: C68
Opening Name: Ruy Lopez: Exchange Variation, Romanovsky Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. Nc3 f6 6. d3
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5c6 d7c6 b1c3 f7f6 d2d3
FEN: r1bqkbnr/1pp3pp/p1p2p2/4p3/4P3/2NP1N2/PPP2PPP/R1BQK2R b KQkq –

ECO: C68
Opening Name: Ruy Lopez: Exchange, Alekhine Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. d4 exd4 6. Qxd4 Qxd4 7. Nxd4 Bd7
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5c6 d7c6 d2d4 e5d4 d1d4 d8d4 f3d4 c8d7
FEN: r3kbnr/1ppb1ppp/p1p5/8/3NP3/8/PPP2PPP/RNB1K2R w KQkq –

ECO: C69
Opening Name: Ruy Lopez: Exchange Variation, Alapin Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. O-O Bg4 6. h3 h5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5c6 d7c6 e1g1 c8g4 h2h3 h7h5
FEN: r2qkbnr/1pp2pp1/p1p5/4p2p/4P1b1/5N1P/PPPP1PP1/RNBQ1RK1 w kq –

ECO: C69
Opening Name: Ruy Lopez: Exchange Variation, Bronstein Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. O-O Qd6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5c6 d7c6 e1g1 d8d6
FEN: r1b1kbnr/1pp2ppp/p1pq4/4p3/4P3/5N2/PPPP1PPP/RNBQ1RK1 w kq –

ECO: C69
Opening Name: Ruy Lopez: Exchange Variation, Gligoric Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. O-O f6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5c6 d7c6 e1g1 f7f6
FEN: r1bqkbnr/1pp3pp/p1p2p2/4p3/4P3/5N2/PPPP1PPP/RNBQ1RK1 w kq –

ECO: C69
Opening Name: Ruy Lopez: Exchange Variation, King’s Bishop Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. O-O Bd6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5c6 d7c6 e1g1 f8d6
FEN: r1bqk1nr/1pp2ppp/p1pb4/4p3/4P3/5N2/PPPP1PPP/RNBQ1RK1 w kq –

ECO: C69
Opening Name: Ruy Lopez: Exchange Variation, Normal Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. O-O
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5c6 d7c6 e1g1
FEN: r1bqkbnr/1pp2ppp/p1p5/4p3/4P3/5N2/PPPP1PPP/RNBQ1RK1 b kq –

ECO: C70
Opening Name: Ruy Lopez: Bird’s Defense Deferred
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nd4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 c6d4
FEN: r1bqkbnr/1ppp1ppp/p7/4p3/B2nP3/5N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: C70
Opening Name: Ruy Lopez: Morphy Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6
FEN: r1bqkbnr/1ppp1ppp/p1n5/1B2p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: C70
Opening Name: Ruy Lopez: Morphy Defense, Alapin’s Defense Deferred
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Bb4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 f8b4
FEN: r1bqk1nr/1ppp1ppp/p1n5/4p3/Bb2P3/5N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: C70
Opening Name: Ruy Lopez: Morphy Defense, Caro Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 b5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 b7b5
FEN: r1bqkbnr/2pp1ppp/p1n5/1p2p3/B3P3/5N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: C70
Opening Name: Ruy Lopez: Morphy Defense, Classical Defense Deferred
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Bc5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 f8c5
FEN: r1bqk1nr/1ppp1ppp/p1n5/2b1p3/B3P3/5N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: C70
Opening Name: Ruy Lopez: Morphy Defense, Cozio Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nge7
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8e7
FEN: r1bqkb1r/1pppnppp/p1n5/4p3/B3P3/5N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: C70
Opening Name: Ruy Lopez: Morphy Defense, Fianchetto Defense Deferred
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 g6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g7g6
FEN: r1bqkbnr/1ppp1p1p/p1n3p1/4p3/B3P3/5N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: C70
Opening Name: Ruy Lopez: Morphy Defense, Graz Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 b5 5. Bb3 Bc5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 b7b5 a4b3 f8c5
FEN: r1bqk1nr/2pp1ppp/p1n5/1pb1p3/4P3/1B3N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: C70
Opening Name: Ruy Lopez: Morphy Defense, Norwegian Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 b5 5. Bb3 Na5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 b7b5 a4b3 c6a5
FEN: r1bqkbnr/2pp1ppp/p7/np2p3/4P3/1B3N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: C70
Opening Name: Ruy Lopez: Morphy Defense, Norwegian Variation, Nightingale Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 b5 5. Bb3 Na5 6. Bxf7+
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 b7b5 a4b3 c6a5 b3f7
FEN: r1bqkbnr/2pp1Bpp/p7/np2p3/4P3/5N2/PPPP1PPP/RNBQK2R b KQkq –

ECO: C70
Opening Name: Ruy Lopez: Morphy Defense, Schliemann Defense Deferred
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 f5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 f7f5
FEN: r1bqkbnr/1ppp2pp/p1n5/4pp2/B3P3/5N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: C70
Opening Name: Ruy Lopez: Morphy Defense, Schliemann Defense Deferred, Jaenisch Gambit Deferred
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 f5 5. exf5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 f7f5 e4f5
FEN: r1bqkbnr/1ppp2pp/p1n5/4pP2/B7/5N2/PPPP1PPP/RNBQK2R b KQkq –

ECO: C71
Opening Name: Ruy Lopez: Morphy Defense, Modern Steinitz Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 d7d6
FEN: r1bqkbnr/1pp2ppp/p1np4/4p3/B3P3/5N2/PPPP1PPP/RNBQK2R w KQkq –

ECO: C71
Opening Name: Ruy Lopez: Morphy Defense, Modern Steinitz Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. Nc3
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 d7d6 b1c3
FEN: r1bqkbnr/1pp2ppp/p1np4/4p3/B3P3/2N2N2/PPPP1PPP/R1BQK2R b KQkq –

ECO: C71
Opening Name: Ruy Lopez: Morphy Defense, Modern Steinitz Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 d7d6 c2c4
FEN: r1bqkbnr/1pp2ppp/p1np4/4p3/B1P1P3/5N2/PP1P1PPP/RNBQK2R b KQkq –

ECO: C71
Opening Name: Ruy Lopez: Noah’s Ark Trap
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 b5 5. Bb3 d6 6. d4 Nxd4 7. Nxd4 exd4 8. Qxd4 c5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 b7b5 a4b3 d7d6 d2d4 c6d4 f3d4 e5d4 d1d4 c7c5
FEN: r1bqkbnr/5ppp/p2p4/1pp5/3QP3/1B6/PPP2PPP/RNB1K2R w KQkq –

ECO: C72
Opening Name: Ruy Lopez: Closed, Kecskemet Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. O-O Bd7 6. c3 Nf6 7. d4 Be7 8. Nbd2 O-O 9. Re1 Be8
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 d7d6 e1g1 c8d7 c2c3 g8f6 d2d4 f8e7 b1d2 e8g8 f1e1 d7e8
FEN: r2qbrk1/1pp1bppp/p1np1n2/4p3/B2PP3/2P2N2/PP1N1PPP/R1BQR1K1 w – –

ECO: C72
Opening Name: Ruy Lopez: Morphy Defense, Modern Steinitz Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. O-O
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 d7d6 e1g1
FEN: r1bqkbnr/1pp2ppp/p1np4/4p3/B3P3/5N2/PPPP1PPP/RNBQ1RK1 b kq –

ECO: C73
Opening Name: Ruy Lopez: Morphy Defense, Modern Steinitz Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. Bxc6+ bxc6 6. d4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 d7d6 a4c6 b7c6 d2d4
FEN: r1bqkbnr/2p2ppp/p1pp4/4p3/3PP3/5N2/PPP2PPP/RNBQK2R b KQkq –

ECO: C73
Opening Name: Ruy Lopez: Morphy Defense, Modern Steinitz Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. Bxc6+ bxc6 6. d4 f6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 d7d6 a4c6 b7c6 d2d4 f7f6
FEN: r1bqkbnr/2p3pp/p1pp1p2/4p3/3PP3/5N2/PPP2PPP/RNBQK2R w KQkq –

ECO: C74
Opening Name: Ruy Lopez: Morphy Defense, Modern Steinitz Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 d7d6 c2c3
FEN: r1bqkbnr/1pp2ppp/p1np4/4p3/B3P3/2P2N2/PP1P1PPP/RNBQK2R b KQkq –

ECO: C74
Opening Name: Ruy Lopez: Morphy Defense, Modern Steinitz Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3 f5 6. exf5 Bxf5 7. O-O
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 d7d6 c2c3 f7f5 e4f5 c8f5 e1g1
FEN: r2qkbnr/1pp3pp/p1np4/4pb2/B7/2P2N2/PP1P1PPP/RNBQ1RK1 b kq –

ECO: C74
Opening Name: Ruy Lopez: Morphy Defense, Modern Steinitz Defense, Siesta Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3 f5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 d7d6 c2c3 f7f5
FEN: r1bqkbnr/1pp3pp/p1np4/4pp2/B3P3/2P2N2/PP1P1PPP/RNBQK2R w KQkq –

ECO: C75
Opening Name: Ruy Lopez: Morphy Defense, Modern Steinitz Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3 Bd7
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 d7d6 c2c3 c8d7
FEN: r2qkbnr/1ppb1ppp/p1np4/4p3/B3P3/2P2N2/PP1P1PPP/RNBQK2R w KQkq –

ECO: C75
Opening Name: Ruy Lopez: Morphy Defense, Modern Steinitz Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3 Bd7 6. d4 Nge7
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 d7d6 c2c3 c8d7 d2d4 g8e7
FEN: r2qkb1r/1ppbnppp/p1np4/4p3/B2PP3/2P2N2/PP3PPP/RNBQK2R w KQkq –

ECO: C76
Opening Name: Ruy Lopez: Morphy Defense, Modern Steinitz Defense, Fianchetto Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 g6 4. c3 a6 5. Ba4 d6 6. d4 Bd7
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 g7g6 c2c3 a7a6 b5a4 d7d6 d2d4 c8d7
FEN: r2qkbnr/1ppb1p1p/p1np2p1/4p3/B2PP3/2P2N2/PP3PPP/RNBQK2R w KQkq –

ECO: C77
Opening Name: Ruy Lopez: Morphy Defense, Anderssen Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. d3
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 d2d3
FEN: r1bqkb1r/1ppp1ppp/p1n2n2/4p3/B3P3/3P1N2/PPP2PPP/RNBQK2R b KQkq –

ECO: C77
Opening Name: Ruy Lopez: Morphy Defense, Bayreuth Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Bxc6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 a4c6
FEN: r1bqkb1r/1ppp1ppp/p1B2n2/4p3/4P3/5N2/PPPP1PPP/RNBQK2R b KQkq –

ECO: C77
Opening Name: Ruy Lopez: Morphy Defense, Duras Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. d3 d6 6. c4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 d2d3 d7d6 c2c4
FEN: r1bqkb1r/1pp2ppp/p1np1n2/4p3/B1P1P3/3P1N2/PP3PPP/RNBQK2R b KQkq –

ECO: C77
Opening Name: Ruy Lopez: Morphy Defense, Jaffe Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. c3
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 c2c3
FEN: r1bqkb1r/1ppp1ppp/p1n2n2/4p3/B3P3/2P2N2/PP1P1PPP/RNBQK2R b KQkq –

ECO: C77
Opening Name: Ruy Lopez: Morphy Defense, Mackenzie Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. d4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 d2d4
FEN: r1bqkb1r/1ppp1ppp/p1n2n2/4p3/B2PP3/5N2/PPP2PPP/RNBQK2R b KQkq –

ECO: C77
Opening Name: Ruy Lopez: Morphy Defense, Tarrasch Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Nc3
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 b1c3
FEN: r1bqkb1r/1ppp1ppp/p1n2n2/4p3/B3P3/2N2N2/PPPP1PPP/R1BQK2R b KQkq –

ECO: C77
Opening Name: Ruy Lopez: Morphy Defense, Wormald Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Qe2
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 d1e2
FEN: r1bqkb1r/1ppp1ppp/p1n2n2/4p3/B3P3/5N2/PPPPQPPP/RNB1K2R b KQkq –

ECO: C77
Opening Name: Ruy Lopez: Wormald Attack, Grünfeld Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Qe2 b5 6. Bb3 Be7 7. d4 d6 8. c3 Bg4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 d1e2 b7b5 a4b3 f8e7 d2d4 d7d6 c2c3 c8g4
FEN: r2qk2r/2p1bppp/p1np1n2/1p2p3/3PP1b1/1BP2N2/PP2QPPP/RNB1K2R w KQkq –

ECO: C78
Opening Name: Ruy Lopez: Brix Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O g6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 g7g6
FEN: r1bqkb1r/1ppp1p1p/p1n2np1/4p3/B3P3/5N2/PPPP1PPP/RNBQ1RK1 w kq –

ECO: C78
Opening Name: Ruy Lopez: Central Countergambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O d5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 d7d5
FEN: r1bqkb1r/1pp2ppp/p1n2n2/3pp3/B3P3/5N2/PPPP1PPP/RNBQ1RK1 w kq –

ECO: C78
Opening Name: Ruy Lopez: Morphy Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1
FEN: r1bqkb1r/1ppp1ppp/p1n2n2/4p3/B3P3/5N2/PPPP1PPP/RNBQ1RK1 b kq –

ECO: C78
Opening Name: Ruy Lopez: Morphy Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 d6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 b7b5 a4b3 d7d6
FEN: r1bqkb1r/2p2ppp/p1np1n2/1p2p3/4P3/1B3N2/PPPP1PPP/RNBQ1RK1 w kq –

ECO: C78
Opening Name: Ruy Lopez: Morphy Defense, Arkhangelsk Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bb7
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 b7b5 a4b3 c8b7
FEN: r2qkb1r/1bpp1ppp/p1n2n2/1p2p3/4P3/1B3N2/PPPP1PPP/RNBQ1RK1 w kq –

ECO: C78
Opening Name: Ruy Lopez: Morphy Defense, Neo-Arkhangelsk Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Bc5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8c5
FEN: r1bqk2r/1ppp1ppp/p1n2n2/2b1p3/B3P3/5N2/PPPP1PPP/RNBQ1RK1 w kq –

ECO: C78
Opening Name: Ruy Lopez: Morphy Defense, Wing Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Be7 7. a4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 b7b5 a4b3 f8e7 a2a4
FEN: r1bqk2r/2ppbppp/p1n2n2/1p2p3/P3P3/1B3N2/1PPP1PPP/RNBQ1RK1 b kq –

ECO: C78
Opening Name: Ruy Lopez: Rabinovich Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 d6 7. Ng5 d5 8. exd5 Nd4 9. Re1 Bc5 10. Rxe5+ Kf8
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 b7b5 a4b3 d7d6 f3g5 d6d5 e4d5 c6d4 f1e1 f8c5 e1e5 e8f8
FEN: r1bq1k1r/2p2ppp/p4n2/1pbPR1N1/3n4/1B6/PPPP1PPP/RNBQ2K1 w – –

ECO: C79
Opening Name: Ruy Lopez: Morphy Defense, Steinitz Deferred
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O d6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 d7d6
FEN: r1bqkb1r/1pp2ppp/p1np1n2/4p3/B3P3/5N2/PPPP1PPP/RNBQ1RK1 w kq –

ECO: C79
Opening Name: Ruy Lopez: Morphy Defense, Steinitz Deferred
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O d6 6. Bxc6+ bxc6 7. d4 Nxe4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 d7d6 a4c6 b7c6 d2d4 f6e4
FEN: r1bqkb1r/2p2ppp/p1pp4/4p3/3Pn3/5N2/PPP2PPP/RNBQ1RK1 w kq –

ECO: C79
Opening Name: Ruy Lopez: Steinitz Defense Deferred, Boleslavsky Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O d6 6. Bxc6+ bxc6 7. d4 Nxe4 8. Re1 f5 9. dxe5 d5 10. Nc3
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 d7d6 a4c6 b7c6 d2d4 f6e4 f1e1 f7f5 d4e5 d6d5 b1c3
FEN: r1bqkb1r/2p3pp/p1p5/3pPp2/4n3/2N2N2/PPP2PPP/R1BQR1K1 b kq –

ECO: C79
Opening Name: Ruy Lopez: Steinitz Defense Deferred, Lipnitsky Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O d6 6. Bxc6+ bxc6 7. d4 Bg4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 d7d6 a4c6 b7c6 d2d4 c8g4
FEN: r2qkb1r/2p2ppp/p1pp1n2/4p3/3PP1b1/5N2/PPP2PPP/RNBQ1RK1 w kq –

ECO: C80
Opening Name: Ruy Lopez: Morphy Defense, Tartakower Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. Qe2
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d1e2
FEN: r1bqkb1r/1ppp1ppp/p1n5/4p3/B3n3/5N2/PPPPQPPP/RNB2RK1 b kq –

ECO: C80
Opening Name: Ruy Lopez: Open
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4
FEN: r1bqkb1r/1ppp1ppp/p1n5/4p3/B3n3/5N2/PPPP1PPP/RNBQ1RK1 w kq –

ECO: C80
Opening Name: Ruy Lopez: Open
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4
FEN: r1bqkb1r/1ppp1ppp/p1n5/4p3/B2Pn3/5N2/PPP2PPP/RNBQ1RK1 b kq –

ECO: C80
Opening Name: Ruy Lopez: Open
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3
FEN: r1bqkb1r/2pp1ppp/p1n5/1p2p3/3Pn3/1B3N2/PPP2PPP/RNBQ1RK1 b kq –

ECO: C80
Opening Name: Ruy Lopez: Open
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5
FEN: r1bqkb1r/2p2ppp/p1n5/1p1pP3/4n3/1B3N2/PPP2PPP/RNBQ1RK1 b kq –

ECO: C80
Opening Name: Ruy Lopez: Open, Berger Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. a4 Nxd4 9. Nxd4 exd4 10. Nc3
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 a2a4 c6d4 f3d4 e5d4 b1c3
FEN: r1bqkb1r/2p2ppp/p7/1p1p4/P2pn3/1BN5/1PP2PPP/R1BQ1RK1 b kq –

ECO: C80
Opening Name: Ruy Lopez: Open, Bernstein Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. Nbd2
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 b1d2
FEN: r2qkb1r/2p2ppp/p1n1b3/1p1pP3/4n3/1B3N2/PPPN1PPP/R1BQ1RK1 b kq –

ECO: C80
Opening Name: Ruy Lopez: Open, Bernstein Variation, Luther Line
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. Nbd2 Bc5 10. Qe1
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 b1d2 f8c5 d1e1
FEN: r2qk2r/2p2ppp/p1n1b3/1pbpP3/4n3/1B3N2/PPPN1PPP/R1B1QRK1 b kq –

ECO: C80
Opening Name: Ruy Lopez: Open, Friess Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Nxe5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 f3e5
FEN: r1bqkb1r/2pp1ppp/p1n5/1p2N3/B2Pn3/8/PPP2PPP/RNBQ1RK1 b kq –

ECO: C80
Opening Name: Ruy Lopez: Open, Harksen Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. c4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 c2c4
FEN: r1bqkb1r/2p2ppp/p1n5/1p1pp3/2PPn3/1B3N2/PP3PPP/RNBQ1RK1 b kq –

ECO: C80
Opening Name: Ruy Lopez: Open, Karpov Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. Nbd2 Nc5 10. c3 d4 11. Ng5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 b1d2 e4c5 c2c3 d5d4 f3g5
FEN: r2qkb1r/2p2ppp/p1n1b3/1pn1P1N1/3p4/1BP5/PP1N1PPP/R1BQ1RK1 b kq –

ECO: C80
Opening Name: Ruy Lopez: Open, Knorre Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. Nc3
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 b1c3
FEN: r1bqkb1r/1ppp1ppp/p1n5/4p3/B3n3/2N2N2/PPPP1PPP/R1BQ1RK1 b kq –

ECO: C80
Opening Name: Ruy Lopez: Open, Main Line
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6
FEN: r2qkb1r/2p2ppp/p1n1b3/1p1pP3/4n3/1B3N2/PPP2PPP/RNBQ1RK1 w kq –

ECO: C80
Opening Name: Ruy Lopez: Open, Richter Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. d5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 d4d5
FEN: r1bqkb1r/2pp1ppp/p1n5/1p1Pp3/B3n3/5N2/PPP2PPP/RNBQ1RK1 b kq –

ECO: C80
Opening Name: Ruy Lopez: Open, Riga Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 exd4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 e5d4
FEN: r1bqkb1r/1ppp1ppp/p1n5/8/B2pn3/5N2/PPP2PPP/RNBQ1RK1 w kq –

ECO: C80
Opening Name: Ruy Lopez: Open, Schlechter Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. a4 Nxd4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 a2a4 c6d4
FEN: r1bqkb1r/2p2ppp/p7/1p1pp3/P2nn3/1B3N2/1PP2PPP/RNBQ1RK1 w kq –

ECO: C80
Opening Name: Ruy Lopez: Open, Skipworth Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. Re1 d5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 f1e1 d7d5
FEN: r1bqkb1r/1pp2ppp/p1n5/3pp3/B3n3/5N2/PPPP1PPP/RNBQR1K1 w kq –

ECO: C80
Opening Name: Ruy Lopez: Open, Zukertort Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Ne7
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c6e7
FEN: r1bqkb1r/2p1nppp/p7/1p1pP3/4n3/1B3N2/PPP2PPP/RNBQ1RK1 w kq –

ECO: C81
Opening Name: Ruy Lopez: Open, Howell Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. Qe2
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 d1e2
FEN: r2qkb1r/2p2ppp/p1n1b3/1p1pP3/4n3/1B3N2/PPP1QPPP/RNB2RK1 b kq –

ECO: C81
Opening Name: Ruy Lopez: Open, Howell Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. Qe2 Be7 10. c4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 d1e2 f8e7 c2c4
FEN: r2qk2r/2p1bppp/p1n1b3/1p1pP3/2P1n3/1B3N2/PP2QPPP/RNB2RK1 b kq –

ECO: C81
Opening Name: Ruy Lopez: Open, Howell Attack, Ekstrom Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. Qe2 Be7 10. Rd1 O-O 11. c4 bxc4 12. Bxc4 Qd7
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 d1e2 f8e7 f1d1 e8g8 c2c4 b5c4 b3c4 d8d7
FEN: r4rk1/2pqbppp/p1n1b3/3pP3/2B1n3/5N2/PP2QPPP/RNBR2K1 w – –

ECO: C82
Opening Name: Ruy Lopez: Open
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 c2c3
FEN: r2qkb1r/2p2ppp/p1n1b3/1p1pP3/4n3/1BP2N2/PP3PPP/RNBQ1RK1 b kq –

ECO: C82
Opening Name: Ruy Lopez: Open, Berlin Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3 Nc5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 c2c3 e4c5
FEN: r2qkb1r/2p2ppp/p1n1b3/1pnpP3/8/1BP2N2/PP3PPP/RNBQ1RK1 w kq –

ECO: C82
Opening Name: Ruy Lopez: Open, Dilworth Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3 Bc5 10. Nbd2 O-O 11. Bc2 Nxf2
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 c2c3 f8c5 b1d2 e8g8 b3c2 e4f2
FEN: r2q1rk1/2p2ppp/p1n1b3/1pbpP3/8/2P2N2/PPBN1nPP/R1BQ1RK1 w – –

ECO: C82
Opening Name: Ruy Lopez: Open, Italian Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3 Bc5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 c2c3 f8c5
FEN: r2qk2r/2p2ppp/p1n1b3/1pbpP3/4n3/1BP2N2/PP3PPP/RNBQ1RK1 w kq –

ECO: C82
Opening Name: Ruy Lopez: Open, Motzko Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3 Bc5 10. Qd3
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 c2c3 f8c5 d1d3
FEN: r2qk2r/2p2ppp/p1n1b3/1pbpP3/4n3/1BPQ1N2/PP3PPP/RNB2RK1 b kq –

ECO: C82
Opening Name: Ruy Lopez: Open, Motzko Attack, Nenarokov Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3 Bc5 10. Qd3 Ne7
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 c2c3 f8c5 d1d3 c6e7
FEN: r2qk2r/2p1nppp/p3b3/1pbpP3/4n3/1BPQ1N2/PP3PPP/RNB2RK1 w kq –

ECO: C82
Opening Name: Ruy Lopez: Open, St. Petersburg Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3 Bc5 10. Nbd2
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 c2c3 f8c5 b1d2
FEN: r2qk2r/2p2ppp/p1n1b3/1pbpP3/4n3/1BP2N2/PP1N1PPP/R1BQ1RK1 b kq –

ECO: C83
Opening Name: Ruy Lopez: Open, Breslau Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3 Be7 10. Re1 O-O 11. Nd4 Nxe5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 c2c3 f8e7 f1e1 e8g8 f3d4 c6e5
FEN: r2q1rk1/2p1bppp/p3b3/1p1pn3/3Nn3/1BP5/PP3PPP/RNBQR1K1 w – –

ECO: C83
Opening Name: Ruy Lopez: Open, Classical Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3 Be7
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 c2c3 f8e7
FEN: r2qk2r/2p1bppp/p1n1b3/1p1pP3/4n3/1BP2N2/PP3PPP/RNBQ1RK1 w kq –

ECO: C83
Opening Name: Ruy Lopez: Open, Classical Defense, Main Line
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 Be7 7. Re1 b5 8. Bb3 d5 9. dxe5 Be6 10. c3
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 f8e7 f1e1 b7b5 a4b3 d7d5 d4e5 c8e6 c2c3
FEN: r2qk2r/2p1bppp/p1n1b3/1p1pP3/4n3/1BP2N2/PP3PPP/RNBQR1K1 b kq –

ECO: C83
Opening Name: Ruy Lopez: Open, Malkin Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3 Be7 10. Nbd2 O-O 11. Qe2
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 c2c3 f8e7 b1d2 e8g8 d1e2
FEN: r2q1rk1/2p1bppp/p1n1b3/1p1pP3/4n3/1BP2N2/PP1NQPPP/R1B2RK1 b – –

ECO: C83
Opening Name: Ruy Lopez: Open, Tarrasch Trap
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3 Be7 10. Re1 O-O 11. Nd4 Qd7 12. Nxe6 fxe6 13. Rxe4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 c2c3 f8e7 f1e1 e8g8 f3d4 d8d7 d4e6 f7e6 e1e4
FEN: r4rk1/2pqb1pp/p1n1p3/1p1pP3/4R3/1BP5/PP3PPP/RNBQ2K1 b – –

ECO: C84
Opening Name: Ruy Lopez: Closed
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7
FEN: r1bqk2r/1pppbppp/p1n2n2/4p3/B3P3/5N2/PPPP1PPP/RNBQ1RK1 w kq –

ECO: C84
Opening Name: Ruy Lopez: Closed, Basque Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. d4 exd4 7. e5 Ne4 8. c3
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 d2d4 e5d4 e4e5 f6e4 c2c3
FEN: r1bqk2r/1pppbppp/p1n5/4P3/B2pn3/2P2N2/PP3PPP/RNBQ1RK1 b kq –

ECO: C84
Opening Name: Ruy Lopez: Closed, Center Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. d4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 d2d4
FEN: r1bqk2r/1pppbppp/p1n2n2/4p3/B2PP3/5N2/PPP2PPP/RNBQ1RK1 b kq –

ECO: C84
Opening Name: Ruy Lopez: Closed, Center Attack, Basque Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. d4 exd4 7. e5 Ne4 8. c3 dxc3
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 d2d4 e5d4 e4e5 f6e4 c2c3 d4c3
FEN: r1bqk2r/1pppbppp/p1n5/4P3/B3n3/2p2N2/PP3PPP/RNBQ1RK1 w kq –

ECO: C84
Opening Name: Ruy Lopez: Closed, Martinez Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. d3
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 d2d3
FEN: r1bqk2r/1pppbppp/p1n2n2/4p3/B3P3/3P1N2/PPP2PPP/RNBQ1RK1 b kq –

ECO: C84
Opening Name: Ruy Lopez: Closed, Morphy Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Nc3
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 b1c3
FEN: r1bqk2r/1pppbppp/p1n2n2/4p3/B3P3/2N2N2/PPPP1PPP/R1BQ1RK1 b kq –

ECO: C85
Opening Name: Ruy Lopez: Closed, Delayed Exchange
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Bxc6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 a4c6
FEN: r1bqk2r/1pppbppp/p1B2n2/4p3/4P3/5N2/PPPP1PPP/RNBQ1RK1 b kq –

ECO: C86
Opening Name: Ruy Lopez: Closed, Worrall Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 d1e2
FEN: r1bqk2r/1pppbppp/p1n2n2/4p3/B3P3/5N2/PPPPQPPP/RNB2RK1 b kq –

ECO: C86
Opening Name: Ruy Lopez: Closed, Worrall Attack, Castling Line
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 O-O
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 d1e2 b7b5 a4b3 e8g8
FEN: r1bq1rk1/2ppbppp/p1n2n2/1p2p3/4P3/1B3N2/PPPPQPPP/RNB2RK1 w – –

ECO: C86
Opening Name: Ruy Lopez: Closed, Worrall Attack, Delayed Castling Line
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 d6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 d1e2 b7b5 a4b3 d7d6
FEN: r1bqk2r/2p1bppp/p1np1n2/1p2p3/4P3/1B3N2/PPPPQPPP/RNB2RK1 w kq –

ECO: C87
Opening Name: Ruy Lopez: Closed, Averbakh Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 d6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 d7d6
FEN: r1bqk2r/1pp1bppp/p1np1n2/4p3/B3P3/5N2/PPPP1PPP/RNBQR1K1 w kq –

ECO: C88
Opening Name: Ruy Lopez: Closed
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3
FEN: r1bqk2r/2ppbppp/p1n2n2/1p2p3/4P3/1B3N2/PPPP1PPP/RNBQR1K1 b kq –

ECO: C88
Opening Name: Ruy Lopez: Closed
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8
FEN: r1bq1rk1/2ppbppp/p1n2n2/1p2p3/4P3/1B3N2/PPPP1PPP/RNBQR1K1 w – –

ECO: C88
Opening Name: Ruy Lopez: Closed, Alekhine Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 Na5 9. Bc2 c5 10. d4 Qc7 11. Nbd2 O-O 12. Nf1 Bg4 13. Ne3 Bxf3 14. Qxf3
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 c6a5 b3c2 c7c5 d2d4 d8c7 b1d2 e8g8 d2f1 c8g4 f1e3 g4f3 d1f3
FEN: r4rk1/2q1bppp/p2p1n2/npp1p3/3PP3/2P1NQ2/PPB2PPP/R1B1R1K1 b – –

ECO: C88
Opening Name: Ruy Lopez: Closed, Anti-Marshall
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. a4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 a2a4
FEN: r1bq1rk1/2ppbppp/p1n2n2/1p2p3/P3P3/1B3N2/1PPP1PPP/RNBQR1K1 b – –

ECO: C88
Opening Name: Ruy Lopez: Closed, Balla Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 Na5 9. Bc2 c5 10. d4 Qc7 11. a4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 c6a5 b3c2 c7c5 d2d4 d8c7 a2a4
FEN: r1b1k2r/2q1bppp/p2p1n2/npp1p3/P2PP3/2P2N2/1PB2PPP/RNBQR1K1 b kq –

ECO: C88
Opening Name: Ruy Lopez: Closed, Leonhardt Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 Na5 9. Bc2 c5 10. d4 Qc7 11. h3 Nc6 12. d5 Nb8 13. Nbd2 g5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 c6a5 b3c2 c7c5 d2d4 d8c7 h2h3 a5c6 d4d5 c6b8 b1d2 g7g5
FEN: rnb1k2r/2q1bp1p/p2p1n2/1ppPp1p1/4P3/2P2N1P/PPBN1PP1/R1BQR1K1 w kq –

ECO: C88
Opening Name: Ruy Lopez: Closed, Rosen Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. d4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 d2d4
FEN: r1bqk2r/2p1bppp/p1np1n2/1p2p3/3PP3/1B3N2/PPP2PPP/RNBQR1K1 b kq –

ECO: C88
Opening Name: Ruy Lopez: Closed, Trajkovic Counterattack
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 Bb7
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 c8b7
FEN: r2qk2r/1bppbppp/p1n2n2/1p2p3/4P3/1B3N2/PPPP1PPP/RNBQR1K1 w kq –

ECO: C88
Opening Name: Ruy Lopez: Noah’s Ark Trap
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. d4 Nxd4 9. Nxd4 exd4 10. Qxd4 c5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 d2d4 c6d4 f3d4 e5d4 d1d4 c7c5
FEN: r1bqk2r/4bppp/p2p1n2/1pp5/3QP3/1B6/PPP2PPP/RNB1R1K1 w kq –

ECO: C89
Opening Name: Ruy Lopez: Marshall Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d5
FEN: r1bq1rk1/2p1bppp/p1n2n2/1p1pp3/4P3/1BP2N2/PP1P1PPP/RNBQR1K1 w – –

ECO: C89
Opening Name: Ruy Lopez: Marshall Attack, Main Line
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d5 9. exd5 Nxd5 10. Nxe5 Nxe5 11. Rxe5 c6 12. d4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d5 e4d5 f6d5 f3e5 c6e5 e1e5 c7c6 d2d4
FEN: r1bq1rk1/4bppp/p1p5/1p1nR3/3P4/1BP5/PP3PPP/RNBQ2K1 b – –

ECO: C89
Opening Name: Ruy Lopez: Marshall Attack, Main Line, Spassky Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d5 9. exd5 Nxd5 10. Nxe5 Nxe5 11. Rxe5 c6 12. d4 Bd6 13. Re1 Qh4 14. g3 Qh3 15. Be3 Bg4 16. Qd3 Rae8 17. Nd2 Re6 18. a4 Qh5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d5 e4d5 f6d5 f3e5 c6e5 e1e5 c7c6 d2d4 e7d6 e5e1 d8h4 g2g3 h4h3 c1e3 c8g4 d1d3 a8e8 b1d2 e8e6 a2a4 h3h5
FEN: 5rk1/5ppp/p1pbr3/1p1n3q/P2P2b1/1BPQB1P1/1P1N1P1P/R3R1K1 w – –

ECO: C89
Opening Name: Ruy Lopez: Marshall Attack, Modern Main Line
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d5 9. exd5 Nxd5 10. Nxe5 Nxe5 11. Rxe5 c6 12. d4 Bd6 13. Re1 Qh4 14. g3 Qh3
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d5 e4d5 f6d5 f3e5 c6e5 e1e5 c7c6 d2d4 e7d6 e5e1 d8h4 g2g3 h4h3
FEN: r1b2rk1/5ppp/p1pb4/1p1n4/3P4/1BP3Pq/PP3P1P/RNBQR1K1 w – –

ECO: C89
Opening Name: Ruy Lopez: Marshall Attack, Modern Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d5 9. exd5 Nxd5 10. Nxe5 Nxe5 11. Rxe5 c6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d5 e4d5 f6d5 f3e5 c6e5 e1e5 c7c6
FEN: r1bq1rk1/4bppp/p1p5/1p1nR3/8/1BP5/PP1P1PPP/RNBQ2K1 w – –

ECO: C89
Opening Name: Ruy Lopez: Marshall Attack, Original Marshall Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d5 9. exd5 Nxd5 10. Nxe5 Nxe5 11. Rxe5 Nf6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d5 e4d5 f6d5 f3e5 c6e5 e1e5 d5f6
FEN: r1bq1rk1/2p1bppp/p4n2/1p2R3/8/1BP5/PP1P1PPP/RNBQ2K1 w – –

ECO: C89
Opening Name: Ruy Lopez: Marshall Attack, Re3 Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d5 9. exd5 Nxd5 10. Nxe5 Nxe5 11. Rxe5 c6 12. Bxd5 cxd5 13. d4 Bd6 14. Re3
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d5 e4d5 f6d5 f3e5 c6e5 e1e5 c7c6 b3d5 c6d5 d2d4 e7d6 e5e3
FEN: r1bq1rk1/5ppp/p2b4/1p1p4/3P4/2P1R3/PP3PPP/RNBQ2K1 b – –

ECO: C89
Opening Name: Ruy Lopez: Marshall Attack, Steiner Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d5 9. exd5 e4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d5 e4d5 e5e4
FEN: r1bq1rk1/2p1bppp/p1n2n2/1p1P4/4p3/1BP2N2/PP1P1PPP/RNBQR1K1 w – –

ECO: C90
Opening Name: Ruy Lopez: Closed
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8
FEN: r1bq1rk1/2p1bppp/p1np1n2/1p2p3/4P3/1BP2N2/PP1P1PPP/RNBQR1K1 w – –

ECO: C90
Opening Name: Ruy Lopez: Closed, Lutikov Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. Bc2
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 b3c2
FEN: r1bq1rk1/2p1bppp/p1np1n2/1p2p3/4P3/2P2N2/PPBP1PPP/RNBQR1K1 b – –

ECO: C90
Opening Name: Ruy Lopez: Closed, Pilnik Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. d3 d6 9. c3
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 d2d3 d7d6 c2c3
FEN: r1bq1rk1/2p1bppp/p1np1n2/1p2p3/4P3/1BPP1N2/PP3PPP/RNBQR1K1 b – –

ECO: C90
Opening Name: Ruy Lopez: Closed, Suetin Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. a3
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 a2a3
FEN: r1bq1rk1/2p1bppp/p1np1n2/1p2p3/4P3/PBP2N2/1P1P1PPP/RNBQR1K1 b – –

ECO: C91
Opening Name: Ruy Lopez: Closed, Bogoljubow Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. d4 Bg4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 d2d4 c8g4
FEN: r2q1rk1/2p1bppp/p1np1n2/1p2p3/3PP1b1/1BP2N2/PP3PPP/RNBQR1K1 w – –

ECO: C91
Opening Name: Ruy Lopez: Closed, Yates Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. d4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 d2d4
FEN: r1bq1rk1/2p1bppp/p1np1n2/1p2p3/3PP3/1BP2N2/PP3PPP/RNBQR1K1 b – –

ECO: C91
Opening Name: Ruy Lopez: Closed, Yates Variation, Short Attack
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. d4 Bg4 10. a4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 d2d4 c8g4 a2a4
FEN: r2q1rk1/2p1bppp/p1np1n2/1p2p3/P2PP1b1/1BP2N2/1P3PPP/RNBQR1K1 b – –

ECO: C92
Opening Name: Ruy Lopez: Closed
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3
FEN: r1bq1rk1/2p1bppp/p1np1n2/1p2p3/4P3/1BP2N1P/PP1P1PP1/RNBQR1K1 b – –

ECO: C92
Opening Name: Ruy Lopez: Closed, Flohr System
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Bb7
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 c8b7
FEN: r2q1rk1/1bp1bppp/p1np1n2/1p2p3/4P3/1BP2N1P/PP1P1PP1/RNBQR1K1 w – –

ECO: C92
Opening Name: Ruy Lopez: Closed, Karpov Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Nd7
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 f6d7
FEN: r1bq1rk1/2pnbppp/p1np4/1p2p3/4P3/1BP2N1P/PP1P1PP1/RNBQR1K1 w – –

ECO: C92
Opening Name: Ruy Lopez: Closed, Kholmov Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Be6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 c8e6
FEN: r2q1rk1/2p1bppp/p1npbn2/1p2p3/4P3/1BP2N1P/PP1P1PP1/RNBQR1K1 w – –

ECO: C92
Opening Name: Ruy Lopez: Closed, Smyslov-Breyer-Zaitsev Hybrid
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Bb7 10. d4 Re8 11. Nbd2 Bf8 12. a3 h6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 c8b7 d2d4 f8e8 b1d2 e7f8 a2a3 h7h6
FEN: r2qrbk1/1bp2pp1/p1np1n1p/1p2p3/3PP3/PBP2N1P/1P1N1PP1/R1BQR1K1 w – –

ECO: C92
Opening Name: Ruy Lopez: Closed, Zaitsev System
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Re8
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 f8e8
FEN: r1bqr1k1/2p1bppp/p1np1n2/1p2p3/4P3/1BP2N1P/PP1P1PP1/RNBQR1K1 w – –

ECO: C93
Opening Name: Ruy Lopez: Closed, Smyslov Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 h6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 h7h6
FEN: r1bq1rk1/2p1bpp1/p1np1n1p/1p2p3/4P3/1BP2N1P/PP1P1PP1/RNBQR1K1 w – –

ECO: C94
Opening Name: Ruy Lopez: Closed, Breyer Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Nb8
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 c6b8
FEN: rnbq1rk1/2p1bppp/p2p1n2/1p2p3/4P3/1BP2N1P/PP1P1PP1/RNBQR1K1 w – –

ECO: C94
Opening Name: Ruy Lopez: Closed, Breyer Defense, Quiet Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Nb8 10. d3
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 c6b8 d2d3
FEN: rnbq1rk1/2p1bppp/p2p1n2/1p2p3/4P3/1BPP1N1P/PP3PP1/RNBQR1K1 b – –

ECO: C95
Opening Name: Ruy Lopez: Closed, Breyer
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Nb8 10. d4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 c6b8 d2d4
FEN: rnbq1rk1/2p1bppp/p2p1n2/1p2p3/3PP3/1BP2N1P/PP3PP1/RNBQR1K1 b – –

ECO: C95
Opening Name: Ruy Lopez: Closed, Breyer Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Nb8 10. d4 Nbd7 11. Nbd2 Bb7 12. Bc2 c5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 c6b8 d2d4 b8d7 b1d2 c8b7 b3c2 c7c5
FEN: r2q1rk1/1b1nbppp/p2p1n2/1pp1p3/3PP3/2P2N1P/PPBN1PP1/R1BQR1K1 w – –

ECO: C95
Opening Name: Ruy Lopez: Closed, Breyer Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Nb8 10. d4 Nbd7 11. Nh4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 c6b8 d2d4 b8d7 f3h4
FEN: r1bq1rk1/2pnbppp/p2p1n2/1p2p3/3PP2N/1BP4P/PP3PP1/RNBQR1K1 b – –

ECO: C95
Opening Name: Ruy Lopez: Closed, Breyer Defense, Zaitsev Hybrid
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Nb8 10. d4 Nbd7
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 c6b8 d2d4 b8d7
FEN: r1bq1rk1/2pnbppp/p2p1n2/1p2p3/3PP3/1BP2N1P/PP3PP1/RNBQR1K1 w – –

ECO: C96
Opening Name: Ruy Lopez: Closed, Borisenko Variation
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5 11. d4 Nc6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 c6a5 b3c2 c7c5 d2d4 a5c6
FEN: r1bq1rk1/4bppp/p1np1n2/1pp1p3/3PP3/2P2N1P/PPB2PP1/RNBQR1K1 w – –

ECO: C96
Opening Name: Ruy Lopez: Closed, Chigorin Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 c6a5 b3c2
FEN: r1bq1rk1/2p1bppp/p2p1n2/np2p3/4P3/2P2N1P/PPBP1PP1/RNBQR1K1 b – –

ECO: C96
Opening Name: Ruy Lopez: Closed, Chigorin Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 c6a5 b3c2 c7c5
FEN: r1bq1rk1/4bppp/p2p1n2/npp1p3/4P3/2P2N1P/PPBP1PP1/RNBQR1K1 w – –

ECO: C96
Opening Name: Ruy Lopez: Closed, Chigorin Defense, Gajewski Gambit
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 d5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 c6a5 b3c2 d6d5
FEN: r1bq1rk1/2p1bppp/p4n2/np1pp3/4P3/2P2N1P/PPBP1PP1/RNBQR1K1 w – –

ECO: C96
Opening Name: Ruy Lopez: Closed, Keres Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5 11. d4 Nd7
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 c6a5 b3c2 c7c5 d2d4 f6d7
FEN: r1bq1rk1/3nbppp/p2p4/npp1p3/3PP3/2P2N1P/PPB2PP1/RNBQR1K1 w – –

ECO: C96
Opening Name: Ruy Lopez: Closed, Rossolimo Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c6 11. d4 Qc7
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 c6a5 b3c2 c7c6 d2d4 d8c7
FEN: r1b2rk1/2q1bppp/p1pp1n2/np2p3/3PP3/2P2N1P/PPB2PP1/RNBQR1K1 w – –

ECO: C97
Opening Name: Ruy Lopez: Closed, Chigorin Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 c6a5
FEN: r1bq1rk1/2p1bppp/p2p1n2/np2p3/4P3/1BP2N1P/PP1P1PP1/RNBQR1K1 w – –

ECO: C97
Opening Name: Ruy Lopez: Closed, Chigorin Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5 11. d4 Qc7
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 c6a5 b3c2 c7c5 d2d4 d8c7
FEN: r1b2rk1/2q1bppp/p2p1n2/npp1p3/3PP3/2P2N1P/PPB2PP1/RNBQR1K1 w – –

ECO: C97
Opening Name: Ruy Lopez: Closed, Chigorin, Yugoslav System
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 Bd7 13. Nf1 Rfe8 14. Ne3 g6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 c6a5 b3c2 c7c5 d2d4 d8c7 b1d2 c8d7 d2f1 f8e8 f1e3 g7g6
FEN: r3r1k1/2qbbp1p/p2p1np1/npp1p3/3PP3/2P1NN1P/PPB2PP1/R1BQR1K1 w – –

ECO: C98
Opening Name: Ruy Lopez: Closed, Chigorin Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 Nc6
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 c6a5 b3c2 c7c5 d2d4 d8c7 b1d2 a5c6
FEN: r1b2rk1/2q1bppp/p1np1n2/1pp1p3/3PP3/2P2N1P/PPBN1PP1/R1BQR1K1 w – –

ECO: C98
Opening Name: Ruy Lopez: Closed, Chigorin Defense
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 Nc6 13. dxc5
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 c6a5 b3c2 c7c5 d2d4 d8c7 b1d2 a5c6 d4c5
FEN: r1b2rk1/2q1bppp/p1np1n2/1pP1p3/4P3/2P2N1P/PPBN1PP1/R1BQR1K1 b – –

ECO: C99
Opening Name: Ruy Lopez: Closed, Chigorin Defense, Panov System
SAN: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 cxd4 13. cxd4
UCI: e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 c6a5 b3c2 c7c5 d2d4 d8c7 b1d2 c5d4 c3d4
FEN: r1b2rk1/2q1bppp/p2p1n2/np2p3/3PP3/5N1P/PPBN1PP1/R1BQR1K1 b – –

ECO: D00
Opening Name: Amazon Attack
SAN: 1. d4 d5 2. Qd3
UCI: d2d4 d7d5 d1d3
FEN: rnbqkbnr/ppp1pppp/8/3p4/3P4/3Q4/PPP1PPPP/RNB1KBNR b KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit
SAN: 1. d4 d5 2. e4
UCI: d2d4 d7d5 e2e4
FEN: rnbqkbnr/ppp1pppp/8/3p4/3PP3/8/PPP2PPP/RNBQKBNR b KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 g8f6
FEN: rnbqkb1r/ppp1pppp/5n2/8/3Pp3/2N5/PPP2PPP/R1BQKBNR w KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit Accepted
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3
FEN: rnbqkb1r/ppp1pppp/5n2/8/3P4/2N2p2/PPP3PP/R1BQKBNR w KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit Accepted: Bogoljubow Defense
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 g6
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3 g1f3 g7g6
FEN: rnbqkb1r/ppp1pp1p/5np1/8/3P4/2N2N2/PPP3PP/R1BQKB1R w KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit Accepted: Bogoljubow Defense, Kloss Attack
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 g6 6. Bc4 Bg7 7. O-O O-O 8. Kh1
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3 g1f3 g7g6 f1c4 f8g7 e1g1 e8g8 g1h1
FEN: rnbq1rk1/ppp1ppbp/5np1/8/2BP4/2N2N2/PPP3PP/R1BQ1R1K b – –

ECO: D00
Opening Name: Blackmar-Diemer Gambit Accepted: Bogoljubow Defense, Mad Dog Attack
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 g6 6. Bc4 Bg7 7. h4
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3 g1f3 g7g6 f1c4 f8g7 h2h4
FEN: rnbqk2r/ppp1ppbp/5np1/8/2BP3P/2N2N2/PPP3P1/R1BQK2R b KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit Accepted: Bogoljubow Defense, Nimzowitsch Attack
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 g6 6. Bc4 Bg7 7. Ne5
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3 g1f3 g7g6 f1c4 f8g7 f3e5
FEN: rnbqk2r/ppp1ppbp/5np1/4N3/2BP4/2N5/PPP3PP/R1BQK2R b KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit Accepted: Bogoljubow Defense, Studier Attack
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 g6 6. Bc4 Bg7 7. O-O O-O 8. Qe1
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3 g1f3 g7g6 f1c4 f8g7 e1g1 e8g8 d1e1
FEN: rnbq1rk1/ppp1ppbp/5np1/8/2BP4/2N2N2/PPP3PP/R1B1QRK1 b – –

ECO: D00
Opening Name: Blackmar-Diemer Gambit Accepted: Euwe Defense
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 e6
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3 g1f3 e7e6
FEN: rnbqkb1r/ppp2ppp/4pn2/8/3P4/2N2N2/PPP3PP/R1BQKB1R w KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit Accepted: Euwe Defense, Zilbermints Gambit
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 e6 6. Bg5 Be7 7. Bd3 Nc6 8. O-O Nxd4 9. Kh1
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3 g1f3 e7e6 c1g5 f8e7 f1d3 b8c6 e1g1 c6d4 g1h1
FEN: r1bqk2r/ppp1bppp/4pn2/6B1/3n4/2NB1N2/PPP3PP/R2Q1R1K b kq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit Accepted: Gunderam Defense
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 Bf5
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3 g1f3 c8f5
FEN: rn1qkb1r/ppp1pppp/5n2/5b2/3P4/2N2N2/PPP3PP/R1BQKB1R w KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 Bf5 6. Ne5 e6 7. g4 Be4
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3 g1f3 c8f5 f3e5 e7e6 g2g4 f5e4
FEN: rn1qkb1r/ppp2ppp/4pn2/4N3/3Pb1P1/2N5/PPP4P/R1BQKB1R w KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit Accepted: Holwell Defense
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 Qd6
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3 g1f3 d8d6
FEN: rnb1kb1r/ppp1pppp/3q1n2/8/3P4/2N2N2/PPP3PP/R1BQKB1R w KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit Accepted: Kaulich Defense
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 c5
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3 g1f3 c7c5
FEN: rnbqkb1r/pp2pppp/5n2/2p5/3P4/2N2N2/PPP3PP/R1BQKB1R w KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit Accepted: Pietrowsky Defense
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 Nc6
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3 g1f3 b8c6
FEN: r1bqkb1r/ppp1pppp/2n2n2/8/3P4/2N2N2/PPP3PP/R1BQKB1R w KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit Accepted: Ritter Defense
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 b6
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3 g1f3 b7b6
FEN: rnbqkb1r/p1p1pppp/1p3n2/8/3P4/2N2N2/PPP3PP/R1BQKB1R w KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit Accepted: Ryder Gambit
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Qxf3
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3 d1f3
FEN: rnbqkb1r/ppp1pppp/5n2/8/3P4/2N2Q2/PPP3PP/R1B1KBNR b KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit Accepted: Schlutter Defense
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 Nbd7
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3 g1f3 b8d7
FEN: r1bqkb1r/pppnpppp/5n2/8/3P4/2N2N2/PPP3PP/R1BQKB1R w KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit Accepted: Teichmann Defense
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 Bg4
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3 g1f3 c8g4
FEN: rn1qkb1r/ppp1pppp/5n2/8/3P2b1/2N2N2/PPP3PP/R1BQKB1R w KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit Accepted: Teichmann Defense, Ciesielski Variation
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 Bg4 6. h3 Bxf3 7. Qxf3 c6 8. Qf2
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3 g1f3 c8g4 h2h3 g4f3 d1f3 c7c6 f3f2
FEN: rn1qkb1r/pp2pppp/2p2n2/8/3P4/2N4P/PPP2QP1/R1B1KB1R b KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit Accepted: Teichmann Defense, Classical Variation
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 Bg4 6. h3 Bxf3 7. Qxf3 c6 8. Be3
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3 g1f3 c8g4 h2h3 g4f3 d1f3 c7c6 c1e3
FEN: rn1qkb1r/pp2pppp/2p2n2/8/3P4/2N1BQ1P/PPP3P1/R3KB1R b KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit Accepted: Teichmann Defense, Seidel-Hall Attack
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 Bg4 6. h3 Bxf3 7. Qxf3 c6 8. g4
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3 g1f3 c8g4 h2h3 g4f3 d1f3 c7c6 g2g4
FEN: rn1qkb1r/pp2pppp/2p2n2/8/3P2P1/2N2Q1P/PPP5/R1B1KB1R b KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit Accepted: Ziegler Defense
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 c6
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3 g1f3 c7c6
FEN: rnbqkb1r/pp2pppp/2p2n2/8/3P4/2N2N2/PPP3PP/R1BQKB1R w KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit Declined: Brombacher Countergambit
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 c5
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 c7c5
FEN: rnbqkb1r/pp2pppp/5n2/2p5/3Pp3/2N2P2/PPP3PP/R1BQKBNR w KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit Declined: Elbert Countergambit
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 e5
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e7e5
FEN: rnbqkb1r/ppp2ppp/5n2/4p3/3Pp3/2N2P2/PPP3PP/R1BQKBNR w KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit Declined: Gedult Defense
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 a6
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 a7a6
FEN: rnbqkb1r/1pp1pppp/p4n2/8/3Pp3/2N2P2/PPP3PP/R1BQKBNR w KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit Declined: Lamb Defense
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 Nc6
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 b8c6
FEN: r1bqkb1r/ppp1pppp/2n2n2/8/3Pp3/2N2P2/PPP3PP/R1BQKBNR w KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit Declined: Langeheinicke Defense
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 e3
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4e3
FEN: rnbqkb1r/ppp1pppp/5n2/8/3P4/2N1pP2/PPP3PP/R1BQKBNR w KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit Declined: O’Kelly Defense
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 c6
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 c7c6
FEN: rnbqkb1r/pp2pppp/2p2n2/8/3Pp3/2N2P2/PPP3PP/R1BQKBNR w KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit Declined: Vienna Defense
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 Bf5
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 c8f5
FEN: rn1qkb1r/ppp1pppp/5n2/5b2/3Pp3/2N2P2/PPP3PP/R1BQKBNR w KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit Declined: Weinsbach Defense
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 e6
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e7e6
FEN: rnbqkb1r/ppp2ppp/4pn2/8/3Pp3/2N2P2/PPP3PP/R1BQKBNR w KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit: Blackmar Gambit
SAN: 1. d4 d5 2. e4 dxe4 3. f3
UCI: d2d4 d7d5 e2e4 d5e4 f2f3
FEN: rnbqkbnr/ppp1pppp/8/8/3Pp3/5P2/PPP3PP/RNBQKBNR b KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit: Diemer-Rosenberg Attack
SAN: 1. d4 d5 2. e4 dxe4 3. Be3
UCI: d2d4 d7d5 e2e4 d5e4 c1e3
FEN: rnbqkbnr/ppp1pppp/8/8/3Pp3/4B3/PPP2PPP/RN1QKBNR b KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit: Fritz Attack
SAN: 1. d4 d5 2. e4 dxe4 3. Bc4
UCI: d2d4 d7d5 e2e4 d5e4 f1c4
FEN: rnbqkbnr/ppp1pppp/8/8/2BPp3/8/PPP2PPP/RNBQK1NR b KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit: Lemberger Countergambit
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 e5
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 e7e5
FEN: rnbqkbnr/ppp2ppp/8/4p3/3Pp3/2N5/PPP2PPP/R1BQKBNR w KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit: Lemberger Countergambit, Endgame Variation
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 e5 4. dxe5
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 e7e5 d4e5
FEN: rnbqkbnr/ppp2ppp/8/4P3/4p3/2N5/PPP2PPP/R1BQKBNR b KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit: Lemberger Countergambit, Lange Gambit
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 e5 4. Nxe4
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 e7e5 c3e4
FEN: rnbqkbnr/ppp2ppp/8/4p3/3PN3/8/PPP2PPP/R1BQKBNR b KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit: Lemberger Countergambit, Rasmussen Attack
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 e5 4. Nge2
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 e7e5 g1e2
FEN: rnbqkbnr/ppp2ppp/8/4p3/3Pp3/2N5/PPP1NPPP/R1BQKB1R b KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit: Lemberger Countergambit, Sneiders Attack
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 e5 4. Qh5
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 e7e5 d1h5
FEN: rnbqkbnr/ppp2ppp/8/4p2Q/3Pp3/2N5/PPP2PPP/R1B1KBNR b KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit: Lemberger Countergambit, Soller Attack
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 e5 4. Be3
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 e7e5 c1e3
FEN: rnbqkbnr/ppp2ppp/8/4p3/3Pp3/2N1B3/PPP2PPP/R2QKBNR b KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit: Netherlands Variation
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 f5
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 f7f5
FEN: rnbqkbnr/ppp1p1pp/8/5p2/3Pp3/2N5/PPP2PPP/R1BQKBNR w KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit: Rasa-Studier Gambit
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. Be3
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 c1e3
FEN: rnbqkb1r/ppp1pppp/5n2/8/3Pp3/2N1B3/PPP2PPP/R2QKBNR b KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit: Reversed Albin Countergambit
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 c5
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 c7c5
FEN: rnbqkbnr/pp2pppp/8/2p5/3Pp3/2N5/PPP2PPP/R1BQKBNR w KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit: Zeller Defense
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 Bf5
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 c8f5
FEN: rn1qkbnr/ppp1pppp/8/5b2/3Pp3/2N5/PPP2PPP/R1BQKBNR w KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit: Zeller Defense, Soller Attack
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 Bf5 4. f3 Nf6 5. Bc4
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 c8f5 f2f3 g8f6 f1c4
FEN: rn1qkb1r/ppp1pppp/5n2/5b2/2BPp3/2N2P2/PPP3PP/R1BQK1NR b KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit: von Popiel Gambit
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. Bg5
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 c1g5
FEN: rnbqkb1r/ppp1pppp/5n2/6B1/3Pp3/2N5/PPP2PPP/R2QKBNR b KQkq –

ECO: D00
Opening Name: Blackmar-Diemer Gambit: von Popiel Gambit, Zilbermints Variation
SAN: 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. Bg5 Bf5 5. Bxf6 exf6 6. g4 Bg6 7. Qe2 Bb4 8. Qb5+
UCI: d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 c1g5 c8f5 g5f6 e7f6 g2g4 f5g6 d1e2 f8b4 e2b5
FEN: rn1qk2r/ppp2ppp/5pb1/1Q6/1b1Pp1P1/2N5/PPP2P1P/R3KBNR b KQkq –

ECO: D00
Opening Name: Queen’s Pawn Game
SAN: 1. d4 d5
UCI: d2d4 d7d5
FEN: rnbqkbnr/ppp1pppp/8/3p4/3P4/8/PPP1PPPP/RNBQKBNR w KQkq –

ECO: D00
Opening Name: Queen’s Pawn Game
SAN: 1. d4 d5 2. e3
UCI: d2d4 d7d5 e2e3
FEN: rnbqkbnr/ppp1pppp/8/3p4/3P4/4P3/PPP2PPP/RNBQKBNR b KQkq –

ECO: D00
Opening Name: Queen’s Pawn Game
SAN: 1. d4 d5 2. e3 Nf6
UCI: d2d4 d7d5 e2e3 g8f6
FEN: rnbqkb1r/ppp1pppp/5n2/3p4/3P4/4P3/PPP2PPP/RNBQKBNR w KQkq –

ECO: D00
Opening Name: Queen’s Pawn Game: Accelerated London System
SAN: 1. d4 d5 2. Bf4
UCI: d2d4 d7d5 c1f4
FEN: rnbqkbnr/ppp1pppp/8/3p4/3P1B2/8/PPP1PPPP/RN1QKBNR b KQkq –

ECO: D00
Opening Name: Queen’s Pawn Game: Accelerated London System, Steinitz Countergambit
SAN: 1. d4 d5 2. Bf4 c5
UCI: d2d4 d7d5 c1f4 c7c5
FEN: rnbqkbnr/pp2pppp/8/2pp4/3P1B2/8/PPP1PPPP/RN1QKBNR w KQkq –

ECO: D00
Opening Name: Queen’s Pawn Game: Accelerated London System, Steinitz Countergambit Accepted
SAN: 1. d4 d5 2. Bf4 c5 3. dxc5
UCI: d2d4 d7d5 c1f4 c7c5 d4c5
FEN: rnbqkbnr/pp2pppp/8/2Pp4/5B2/8/PPP1PPPP/RN1QKBNR b KQkq –

ECO: D00
Opening Name: Queen’s Pawn Game: Accelerated London System, Steinitz Countergambit, Morris Countergambit
SAN: 1. d4 d5 2. Bf4 c5 3. e4
UCI: d2d4 d7d5 c1f4 c7c5 e2e4
FEN: rnbqkbnr/pp2pppp/8/2pp4/3PPB2/8/PPP2PPP/RN1QKBNR b KQkq –

ECO: D00
Opening Name: Queen’s Pawn Game: Accelerated London System, Steinitz Countergambit, Morris Countergambit Accepted
SAN: 1. d4 d5 2. Bf4 c5 3. e4 dxe4
UCI: d2d4 d7d5 c1f4 c7c5 e2e4 d5e4
FEN: rnbqkbnr/pp2pppp/8/2p5/3PpB2/8/PPP2PPP/RN1QKBNR w KQkq –

ECO: D00
Opening Name: Queen’s Pawn Game: Chigorin Variation
SAN: 1. d4 d5 2. Nc3
UCI: d2d4 d7d5 b1c3
FEN: rnbqkbnr/ppp1pppp/8/3p4/3P4/2N5/PPP1PPPP/R1BQKBNR b KQkq –

ECO: D00
Opening Name: Queen’s Pawn Game: Chigorin Variation
SAN: 1. d4 d5 2. Nc3 e6
UCI: d2d4 d7d5 b1c3 e7e6
FEN: rnbqkbnr/ppp2ppp/4p3/3p4/3P4/2N5/PPP1PPPP/R1BQKBNR w KQkq –

ECO: D00
Opening Name: Queen’s Pawn Game: Chigorin Variation, Alburt Defense
SAN: 1. d4 d5 2. Nc3 Bf5
UCI: d2d4 d7d5 b1c3 c8f5
FEN: rn1qkbnr/ppp1pppp/8/3p1b2/3P4/2N5/PPP1PPPP/R1BQKBNR w KQkq –

ECO: D00
Opening Name: Queen’s Pawn Game: Chigorin Variation, Anti-Veresov
SAN: 1. d4 d5 2. Nc3 Bg4
UCI: d2d4 d7d5 b1c3 c8g4
FEN: rn1qkbnr/ppp1pppp/8/3p4/3P2b1/2N5/PPP1PPPP/R1BQKBNR w KQkq –

ECO: D00
Opening Name: Queen’s Pawn Game: Chigorin Variation, Fianchetto Defense
SAN: 1. d4 g6 2. Nf3 Bg7 3. Nc3 d5
UCI: d2d4 g7g6 g1f3 f8g7 b1c3 d7d5
FEN: rnbqk1nr/ppp1ppbp/6p1/3p4/3P4/2N2N2/PPP1PPPP/R1BQKB1R w KQkq –

ECO: D00
Opening Name: Queen’s Pawn Game: Chigorin Variation, Irish Gambit
SAN: 1. d4 d5 2. Nc3 c5
UCI: d2d4 d7d5 b1c3 c7c5
FEN: rnbqkbnr/pp2pppp/8/2pp4/3P4/2N5/PPP1PPPP/R1BQKBNR w KQkq –

ECO: D00
Opening Name: Queen’s Pawn Game: Chigorin Variation, Shaviliuk Gambit
SAN: 1. d4 d5 2. Nc3 e5
UCI: d2d4 d7d5 b1c3 e7e5
FEN: rnbqkbnr/ppp2ppp/8/3pp3/3P4/2N5/PPP1PPPP/R1BQKBNR w KQkq –

ECO: D00
Opening Name: Queen’s Pawn Game: Chigorin Variation, Shropshire Defense
SAN: 1. d4 d5 2. Nc3 h5
UCI: d2d4 d7d5 b1c3 h7h5
FEN: rnbqkbnr/ppp1ppp1/8/3p3p/3P4/2N5/PPP1PPPP/R1BQKBNR w KQkq –

ECO: D00
Opening Name: Queen’s Pawn Game: Hübsch Gambit
SAN: 1. d4 Nf6 2. Nc3 d5 3. e4
UCI: d2d4 g8f6 b1c3 d7d5 e2e4
FEN: rnbqkb1r/ppp1pppp/5n2/3p4/3PP3/2N5/PPP2PPP/R1BQKBNR b KQkq –

ECO: D00
Opening Name: Queen’s Pawn Game: Levitsky Attack
SAN: 1. d4 d5 2. Bg5
UCI: d2d4 d7d5 c1g5
FEN: rnbqkbnr/ppp1pppp/8/3p2B1/3P4/8/PPP1PPPP/RN1QKBNR b KQkq –

ECO: D00
Opening Name: Queen’s Pawn Game: Levitsky Attack, Welling Variation
SAN: 1. d4 d5 2. Bg5 Bg4
UCI: d2d4 d7d5 c1g5 c8g4
FEN: rn1qkbnr/ppp1pppp/8/3p2B1/3P2b1/8/PPP1PPPP/RN1QKBNR w KQkq –

ECO: D00
Opening Name: Queen’s Pawn Game: Mason Attack
SAN: 1. d4 d5 2. f4
UCI: d2d4 d7d5 f2f4
FEN: rnbqkbnr/ppp1pppp/8/3p4/3P1P2/8/PPP1P1PP/RNBQKBNR b KQkq –

ECO: D00
Opening Name: Queen’s Pawn Game: Stonewall Attack
SAN: 1. d4 d5 2. e3 Nf6 3. Bd3
UCI: d2d4 d7d5 e2e3 g8f6 f1d3
FEN: rnbqkb1r/ppp1pppp/5n2/3p4/3P4/3BP3/PPP2PPP/RNBQK1NR b KQkq –

ECO: D00
Opening Name: Queen’s Pawn Game: Zurich Gambit
SAN: 1. d4 d5 2. g4
UCI: d2d4 d7d5 g2g4
FEN: rnbqkbnr/ppp1pppp/8/3p4/3P2P1/8/PPP1PP1P/RNBQKBNR b KQkq –

ECO: D01
Opening Name: Rapport-Jobava System
SAN: 1. d4 d5 2. Nc3 Nf6 3. Bf4
UCI: d2d4 d7d5 b1c3 g8f6 c1f4
FEN: rnbqkb1r/ppp1pppp/5n2/3p4/3P1B2/2N5/PPP1PPPP/R2QKBNR b KQkq –

ECO: D01
Opening Name: Rapport-Jobava System
SAN: 1. d4 d5 2. Nc3 Nf6 3. Bf4 e6
UCI: d2d4 d7d5 b1c3 g8f6 c1f4 e7e6
FEN: rnbqkb1r/ppp2ppp/4pn2/3p4/3P1B2/2N5/PPP1PPPP/R2QKBNR w KQkq –

ECO: D01
Opening Name: Rapport-Jobava System
SAN: 1. d4 d5 2. Nc3 Nf6 3. Bf4 g6
UCI: d2d4 d7d5 b1c3 g8f6 c1f4 g7g6
FEN: rnbqkb1r/ppp1pp1p/5np1/3p4/3P1B2/2N5/PPP1PPPP/R2QKBNR w KQkq –

ECO: D01
Opening Name: Rapport-Jobava System, with e6
SAN: 1. d4 d5 2. Nc3 e6 3. Bf4
UCI: d2d4 d7d5 b1c3 e7e6 c1f4
FEN: rnbqkbnr/ppp2ppp/4p3/3p4/3P1B2/2N5/PPP1PPPP/R2QKBNR b KQkq –

ECO: D01
Opening Name: Richter-Veresov Attack
SAN: 1. d4 Nf6 2. Nc3 d5 3. Bg5
UCI: d2d4 g8f6 b1c3 d7d5 c1g5
FEN: rnbqkb1r/ppp1pppp/5n2/3p2B1/3P4/2N5/PPP1PPPP/R2QKBNR b KQkq –

ECO: D01
Opening Name: Richter-Veresov Attack
SAN: 1. d4 Nf6 2. Nc3 d5 3. Bg5 Bf5
UCI: d2d4 g8f6 b1c3 d7d5 c1g5 c8f5
FEN: rn1qkb1r/ppp1pppp/5n2/3p1bB1/3P4/2N5/PPP1PPPP/R2QKBNR w KQkq –

ECO: D01
Opening Name: Richter-Veresov Attack: Boyce Defense
SAN: 1. d4 Nf6 2. Nc3 d5 3. Bg5 Ne4
UCI: d2d4 g8f6 b1c3 d7d5 c1g5 f6e4
FEN: rnbqkb1r/ppp1pppp/8/3p2B1/3Pn3/2N5/PPP1PPPP/R2QKBNR w KQkq –

ECO: D01
Opening Name: Richter-Veresov Attack: Malich Gambit
SAN: 1. d4 Nf6 2. Nc3 d5 3. Bg5 c5 4. Bxf6 gxf6 5. e4 dxe4 6. d5
UCI: d2d4 g8f6 b1c3 d7d5 c1g5 c7c5 g5f6 g7f6 e2e4 d5e4 d4d5
FEN: rnbqkb1r/pp2pp1p/5p2/2pP4/4p3/2N5/PPP2PPP/R2QKBNR b KQkq –

ECO: D01
Opening Name: Richter-Veresov Attack: Richter Variation
SAN: 1. d4 Nf6 2. Nc3 d5 3. Bg5 Bf5 4. f3
UCI: d2d4 g8f6 b1c3 d7d5 c1g5 c8f5 f2f3
FEN: rn1qkb1r/ppp1pppp/5n2/3p1bB1/3P4/2N2P2/PPP1P1PP/R2QKBNR b KQkq –

ECO: D01
Opening Name: Richter-Veresov Attack: Two Knights System
SAN: 1. d4 Nf6 2. Nc3 d5 3. Bg5 Nbd7 4. Nf3
UCI: d2d4 g8f6 b1c3 d7d5 c1g5 b8d7 g1f3
FEN: r1bqkb1r/pppnpppp/5n2/3p2B1/3P4/2N2N2/PPP1PPPP/R2QKB1R b KQkq –

ECO: D01
Opening Name: Richter-Veresov Attack: Two Knights System, Grünfeld Defense
SAN: 1. d4 Nf6 2. Nc3 d5 3. Bg5 Nbd7 4. Nf3 g6
UCI: d2d4 g8f6 b1c3 d7d5 c1g5 b8d7 g1f3 g7g6
FEN: r1bqkb1r/pppnpp1p/5np1/3p2B1/3P4/2N2N2/PPP1PPPP/R2QKB1R w KQkq –

ECO: D01
Opening Name: Richter-Veresov Attack: Veresov Variation
SAN: 1. d4 Nf6 2. Nc3 d5 3. Bg5 Bf5 4. Bxf6
UCI: d2d4 g8f6 b1c3 d7d5 c1g5 c8f5 g5f6
FEN: rn1qkb1r/ppp1pppp/5B2/3p1b2/3P4/2N5/PPP1PPPP/R2QKBNR b KQkq –

ECO: D02
Opening Name: London System: Poisoned Pawn Variation
SAN: 1. d4 Nf6 2. Nf3 d5 3. Bf4 c5 4. e3 Qb6 5. Nc3
UCI: d2d4 g8f6 g1f3 d7d5 c1f4 c7c5 e2e3 d8b6 b1c3
FEN: rnb1kb1r/pp2pppp/1q3n2/2pp4/3P1B2/2N1PN2/PPP2PPP/R2QKB1R b KQkq –

ECO: D02
Opening Name: Queen’s Gambit Declined: Baltic Defense, Pseudo-Slav
SAN: 1. d4 d5 2. Nf3 Bf5 3. c4 e6 4. Nc3 c6
UCI: d2d4 d7d5 g1f3 c8f5 c2c4 e7e6 b1c3 c7c6
FEN: rn1qkbnr/pp3ppp/2p1p3/3p1b2/2PP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq –

ECO: D02
Opening Name: Queen’s Pawn Game: Anti-Torre
SAN: 1. Nf3 d5 2. d4 Bg4
UCI: g1f3 d7d5 d2d4 c8g4
FEN: rn1qkbnr/ppp1pppp/8/3p4/3P2b1/5N2/PPP1PPPP/RNBQKB1R w KQkq –

ECO: D02
Opening Name: Queen’s Pawn Game: Chandler Gambit
SAN: 1. d4 d5 2. Nf3 c5 3. g3 cxd4 4. Bg2
UCI: d2d4 d7d5 g1f3 c7c5 g2g3 c5d4 f1g2
FEN: rnbqkbnr/pp2pppp/8/3p4/3p4/5NP1/PPP1PPBP/RNBQK2R b KQkq –

ECO: D02
Opening Name: Queen’s Pawn Game: Chigorin Variation
SAN: 1. d4 d5 2. Nf3 Nc6
UCI: d2d4 d7d5 g1f3 b8c6
FEN: r1bqkbnr/ppp1pppp/2n5/3p4/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq –

ECO: D02
Opening Name: Queen’s Pawn Game: Krause Variation
SAN: 1. d4 d5 2. Nf3 c5
UCI: d2d4 d7d5 g1f3 c7c5
FEN: rnbqkbnr/pp2pppp/8/2pp4/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq –

ECO: D02
Opening Name: Queen’s Pawn Game: Levitsky Attack, Euwe Variation, Modern Line
SAN: 1. d4 d5 2. Nf3 c6 3. Bg5 h6 4. Bh4 Qb6
UCI: d2d4 d7d5 g1f3 c7c6 c1g5 h7h6 g5h4 d8b6
FEN: rnb1kbnr/pp2ppp1/1qp4p/3p4/3P3B/5N2/PPP1PPPP/RN1QKB1R w KQkq –

ECO: D02
Opening Name: Queen’s Pawn Game: London System
SAN: 1. d4 d5 2. Nf3 Nf6 3. Bf4
UCI: d2d4 d7d5 g1f3 g8f6 c1f4
FEN: rnbqkb1r/ppp1pppp/5n2/3p4/3P1B2/5N2/PPP1PPPP/RN1QKB1R b KQkq –

ECO: D02
Opening Name: Queen’s Pawn Game: London System, Pterodactyl Variation
SAN: 1. d4 g6 2. Nf3 Bg7 3. Bf4 c5 4. c3 cxd4 5. cxd4 Qa5+
UCI: d2d4 g7g6 g1f3 f8g7 c1f4 c7c5 c2c3 c5d4 c3d4 d8a5
FEN: rnb1k1nr/pp1pppbp/6p1/q7/3P1B2/5N2/PP2PPPP/RN1QKB1R w KQkq –

ECO: D02
Opening Name: Queen’s Pawn Game: London System, with e6
SAN: 1. d4 d5 2. Nf3 e6 3. Bf4
UCI: d2d4 d7d5 g1f3 e7e6 c1f4
FEN: rnbqkbnr/ppp2ppp/4p3/3p4/3P1B2/5N2/PPP1PPPP/RN1QKB1R b KQkq –

ECO: D02
Opening Name: Queen’s Pawn Game: Symmetrical Variation
SAN: 1. d4 d5 2. Nf3 Nf6
UCI: d2d4 d7d5 g1f3 g8f6
FEN: rnbqkb1r/ppp1pppp/5n2/3p4/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq –

ECO: D02
Opening Name: Queen’s Pawn Game: Symmetrical Variation, Pseudo-Catalan
SAN: 1. d4 d5 2. Nf3 Nf6 3. g3
UCI: d2d4 d7d5 g1f3 g8f6 g2g3
FEN: rnbqkb1r/ppp1pppp/5n2/3p4/3P4/5NP1/PPP1PP1P/RNBQKB1R b KQkq –

ECO: D02
Opening Name: Queen’s Pawn Game: Zilbermints Countergambit
SAN: 1. d4 d5 2. Nf3 Nf6 3. c4 b5
UCI: d2d4 d7d5 g1f3 g8f6 c2c4 b7b5
FEN: rnbqkb1r/p1p1pppp/5n2/1p1p4/2PP4/5N2/PP2PPPP/RNBQKB1R w KQkq –

ECO: D02
Opening Name: Queen’s Pawn Game: Zukertort Variation
SAN: 1. d4 d5 2. Nf3
UCI: d2d4 d7d5 g1f3
FEN: rnbqkbnr/ppp1pppp/8/3p4/3P4/5N2/PPP1PPPP/RNBQKB1R b KQkq –

ECO: D03
Opening Name: Queen’s Pawn Game: Torre Attack
SAN: 1. d4 d5 2. Nf3 Nf6 3. Bg5
UCI: d2d4 d7d5 g1f3 g8f6 c1g5
FEN: rnbqkb1r/ppp1pppp/5n2/3p2B1/3P4/5N2/PPP1PPPP/RN1QKB1R b KQkq –

ECO: D03
Opening Name: Queen’s Pawn Game: Torre Attack, Gossip Variation
SAN: 1. d4 d5 2. Nf3 Nf6 3. Bg5 Ne4
UCI: d2d4 d7d5 g1f3 g8f6 c1g5 f6e4
FEN: rnbqkb1r/ppp1pppp/8/3p2B1/3Pn3/5N2/PPP1PPPP/RN1QKB1R w KQkq –

ECO: D03
Opening Name: Queen’s Pawn Game: Torre Attack, Grünfeld Variation
SAN: 1. d4 d5 2. Nf3 Nf6 3. Bg5 g6
UCI: d2d4 d7d5 g1f3 g8f6 c1g5 g7g6
FEN: rnbqkb1r/ppp1pp1p/5np1/3p2B1/3P4/5N2/PPP1PPPP/RN1QKB1R w KQkq –

ECO: D04
Opening Name: Queen’s Pawn Game: Colle System
SAN: 1. d4 d5 2. Nf3 Nf6 3. e3
UCI: d2d4 d7d5 g1f3 g8f6 e2e3
FEN: rnbqkb1r/ppp1pppp/5n2/3p4/3P4/4PN2/PPP2PPP/RNBQKB1R b KQkq –

ECO: D04
Opening Name: Queen’s Pawn Game: Colle System, Anti-Colle
SAN: 1. d4 d5 2. Nf3 Nf6 3. e3 Bf5
UCI: d2d4 d7d5 g1f3 g8f6 e2e3 c8f5
FEN: rn1qkb1r/ppp1pppp/5n2/3p1b2/3P4/4PN2/PPP2PPP/RNBQKB1R w KQkq –

ECO: D04
Opening Name: Queen’s Pawn Game: Colle System, Grünfeld Formation
SAN: 1. d4 d5 2. Nf3 Nf6 3. e3 g6 4. Bd3 Bg7
UCI: d2d4 d7d5 g1f3 g8f6 e2e3 g7g6 f1d3 f8g7
FEN: rnbqk2r/ppp1ppbp/5np1/3p4/3P4/3BPN2/PPP2PPP/RNBQK2R w KQkq –

ECO: D05
Opening Name: Queen’s Pawn Game: Colle System
SAN: 1. d4 d5 2. Nf3 Nf6 3. e3 e6
UCI: d2d4 d7d5 g1f3 g8f6 e2e3 e7e6
FEN: rnbqkb1r/ppp2ppp/4pn2/3p4/3P4/4PN2/PPP2PPP/RNBQKB1R w KQkq –

ECO: D05
Opening Name: Queen’s Pawn Game: Colle System
SAN: 1. d4 d5 2. Nf3 Nf6 3. e3 e6 4. Bd3
UCI: d2d4 d7d5 g1f3 g8f6 e2e3 e7e6 f1d3
FEN: rnbqkb1r/ppp2ppp/4pn2/3p4/3P4/3BPN2/PPP2PPP/RNBQK2R b KQkq –

ECO: D05
Opening Name: Queen’s Pawn Game: Colle System, Traditional Colle
SAN: 1. d4 Nf6 2. Nf3 e6 3. e3 c5 4. Bd3 d5 5. c3
UCI: d2d4 g8f6 g1f3 e7e6 e2e3 c7c5 f1d3 d7d5 c2c3
FEN: rnbqkb1r/pp3ppp/4pn2/2pp4/3P4/2PBPN2/PP3PPP/RNBQK2R b KQkq –

ECO: D05
Opening Name: Queen’s Pawn Game: Zukertort Variation
SAN: 1. d4 d5 2. Nf3 c5 3. e3 Nf6 4. Nbd2 e6 5. b3
UCI: d2d4 d7d5 g1f3 c7c5 e2e3 g8f6 b1d2 e7e6 b2b3
FEN: rnbqkb1r/pp3ppp/4pn2/2pp4/3P4/1P2PN2/P1PN1PPP/R1BQKB1R b KQkq –

ECO: D05
Opening Name: Rubinstein Opening
SAN: 1. d4 Nf6 2. Nf3 e6 3. e3 c5 4. Bd3 d5 5. b3
UCI: d2d4 g8f6 g1f3 e7e6 e2e3 c7c5 f1d3 d7d5 b2b3
FEN: rnbqkb1r/pp3ppp/4pn2/2pp4/3P4/1P1BPN2/P1P2PPP/RNBQK2R b KQkq –

ECO: D05
Opening Name: Rubinstein Opening: Bogoljubow Defense
SAN: 1. d4 Nf6 2. Nf3 e6 3. e3 c5 4. Bd3 d5 5. b3 Nc6 6. O-O Bd6 7. Bb2 O-O
UCI: d2d4 g8f6 g1f3 e7e6 e2e3 c7c5 f1d3 d7d5 b2b3 b8c6 e1g1 f8d6 c1b2 e8g8
FEN: r1bq1rk1/pp3ppp/2nbpn2/2pp4/3P4/1P1BPN2/PBP2PPP/RN1Q1RK1 w – –

ECO: D05
Opening Name: Rubinstein Opening: Classical Defense
SAN: 1. d4 Nf6 2. Nf3 e6 3. e3 c5 4. Bd3 d5 5. b3 Nc6 6. O-O Be7 7. Bb2 O-O
UCI: d2d4 g8f6 g1f3 e7e6 e2e3 c7c5 f1d3 d7d5 b2b3 b8c6 e1g1 f8e7 c1b2 e8g8
FEN: r1bq1rk1/pp2bppp/2n1pn2/2pp4/3P4/1P1BPN2/PBP2PPP/RN1Q1RK1 w – –

ECO: D05
Opening Name: Rubinstein Opening: Semi-Slav Defense
SAN: 1. d4 d5 2. Nf3 Nf6 3. e3 e6 4. Bd3 Bd6 5. O-O O-O 6. b3 Nbd7 7. Bb2
UCI: d2d4 d7d5 g1f3 g8f6 e2e3 e7e6 f1d3 f8d6 e1g1 e8g8 b2b3 b8d7 c1b2
FEN: r1bq1rk1/pppn1ppp/3bpn2/3p4/3P4/1P1BPN2/PBP2PPP/RN1Q1RK1 b – –

ECO: D06
Opening Name: Queen’s Gambit
SAN: 1. d4 d5 2. c4
UCI: d2d4 d7d5 c2c4
FEN: rnbqkbnr/ppp1pppp/8/3p4/2PP4/8/PP2PPPP/RNBQKBNR b KQkq –

ECO: D06
Opening Name: Queen’s Gambit Declined: Austrian Attack, Salvio Countergambit
SAN: 1. d4 d5 2. c4 c5 3. dxc5 d4
UCI: d2d4 d7d5 c2c4 c7c5 d4c5 d5d4
FEN: rnbqkbnr/pp2pppp/8/2P5/2Pp4/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: D06
Opening Name: Queen’s Gambit Declined: Austrian Defense
SAN: 1. d4 d5 2. c4 c5
UCI: d2d4 d7d5 c2c4 c7c5
FEN: rnbqkbnr/pp2pppp/8/2pp4/2PP4/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: D06
Opening Name: Queen’s Gambit Declined: Austrian Defense, Gusev Countergambit
SAN: 1. d4 d5 2. c4 c5 3. cxd5 Nf6
UCI: d2d4 d7d5 c2c4 c7c5 c4d5 g8f6
FEN: rnbqkb1r/pp2pppp/5n2/2pP4/3P4/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: D06
Opening Name: Queen’s Gambit Declined: Austrian Defense, Haberditz Variation
SAN: 1. d4 d5 2. c4 c5 3. cxd5 Nf6 4. e4 Nxe4 5. dxc5 Qa5+
UCI: d2d4 d7d5 c2c4 c7c5 c4d5 g8f6 e2e4 f6e4 d4c5 d8a5
FEN: rnb1kb1r/pp2pppp/8/q1PP4/4n3/8/PP3PPP/RNBQKBNR w KQkq –

ECO: D06
Opening Name: Queen’s Gambit Declined: Baltic Defense
SAN: 1. d4 d5 2. c4 Bf5
UCI: d2d4 d7d5 c2c4 c8f5
FEN: rn1qkbnr/ppp1pppp/8/3p1b2/2PP4/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: D06
Opening Name: Queen’s Gambit Declined: Baltic Defense, Argentinian Gambit
SAN: 1. d4 d5 2. c4 Bf5 3. cxd5 Bxb1 4. Qa4+ c6 5. dxc6 Nxc6
UCI: d2d4 d7d5 c2c4 c8f5 c4d5 f5b1 d1a4 c7c6 d5c6 b8c6
FEN: r2qkbnr/pp2pppp/2n5/8/Q2P4/8/PP2PPPP/RbB1KBNR w KQkq –

ECO: D06
Opening Name: Queen’s Gambit Declined: Baltic Defense, Pseudo-Chigorin
SAN: 1. d4 d5 2. c4 Bf5 3. Nc3 e6 4. Nf3 Nc6
UCI: d2d4 d7d5 c2c4 c8f5 b1c3 e7e6 g1f3 b8c6
FEN: r2qkbnr/ppp2ppp/2n1p3/3p1b2/2PP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq –

ECO: D06
Opening Name: Queen’s Gambit Declined: Baltic Defense, Queen Attack
SAN: 1. d4 d5 2. c4 Bf5 3. Qb3
UCI: d2d4 d7d5 c2c4 c8f5 d1b3
FEN: rn1qkbnr/ppp1pppp/8/3p1b2/2PP4/1Q6/PP2PPPP/RNB1KBNR b KQkq –

ECO: D06
Opening Name: Queen’s Gambit Declined: Baltic Defense, Queen Attack Deferred
SAN: 1. d4 d5 2. c4 Bf5 3. Nc3 e6 4. Qb3
UCI: d2d4 d7d5 c2c4 c8f5 b1c3 e7e6 d1b3
FEN: rn1qkbnr/ppp2ppp/4p3/3p1b2/2PP4/1QN5/PP2PPPP/R1B1KBNR b KQkq –

ECO: D06
Opening Name: Queen’s Gambit Declined: Marshall Defense
SAN: 1. d4 d5 2. c4 Nf6
UCI: d2d4 d7d5 c2c4 g8f6
FEN: rnbqkb1r/ppp1pppp/5n2/3p4/2PP4/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: D06
Opening Name: Queen’s Gambit Declined: Marshall Defense, Tan Gambit
SAN: 1. d4 d5 2. c4 Nf6 3. cxd5 c6
UCI: d2d4 d7d5 c2c4 g8f6 c4d5 c7c6
FEN: rnbqkb1r/pp2pppp/2p2n2/3P4/3P4/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: D06
Opening Name: Queen’s Gambit Declined: Zilbermints Gambit
SAN: 1. d4 d5 2. c4 b5
UCI: d2d4 d7d5 c2c4 b7b5
FEN: rnbqkbnr/p1p1pppp/8/1p1p4/2PP4/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: D07
Opening Name: Queen’s Gambit Declined: Chigorin Defense
SAN: 1. d4 d5 2. c4 Nc6
UCI: d2d4 d7d5 c2c4 b8c6
FEN: r1bqkbnr/ppp1pppp/2n5/3p4/2PP4/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: D07
Opening Name: Queen’s Gambit Declined: Chigorin Defense
SAN: 1. d4 d5 2. c4 Nc6 3. Nc3
UCI: d2d4 d7d5 c2c4 b8c6 b1c3
FEN: r1bqkbnr/ppp1pppp/2n5/3p4/2PP4/2N5/PP2PPPP/R1BQKBNR b KQkq –

ECO: D07
Opening Name: Queen’s Gambit Declined: Chigorin Defense
SAN: 1. d4 d5 2. c4 Nc6 3. Nc3 dxc4
UCI: d2d4 d7d5 c2c4 b8c6 b1c3 d5c4
FEN: r1bqkbnr/ppp1pppp/2n5/8/2pP4/2N5/PP2PPPP/R1BQKBNR w KQkq –

ECO: D07
Opening Name: Queen’s Gambit Declined: Chigorin Defense, Exchange Variation
SAN: 1. d4 d5 2. c4 Nc6 3. cxd5 Qxd5
UCI: d2d4 d7d5 c2c4 b8c6 c4d5 d8d5
FEN: r1b1kbnr/ppp1pppp/2n5/3q4/3P4/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: D07
Opening Name: Queen’s Gambit Declined: Chigorin Defense, Exchange Variation, Costa’s Line
SAN: 1. d4 d5 2. c4 Nc6 3. cxd5 Qxd5 4. e3 e5 5. Nc3 Bb4 6. Bd2 Bxc3 7. Bxc3 exd4 8. Ne2
UCI: d2d4 d7d5 c2c4 b8c6 c4d5 d8d5 e2e3 e7e5 b1c3 f8b4 c1d2 b4c3 d2c3 e5d4 g1e2
FEN: r1b1k1nr/ppp2ppp/2n5/3q4/3p4/2B1P3/PP2NPPP/R2QKB1R b KQkq –

ECO: D07
Opening Name: Queen’s Gambit Declined: Chigorin Defense, Janowski Variation
SAN: 1. d4 d5 2. c4 Nc6 3. Nc3 dxc4 4. Nf3
UCI: d2d4 d7d5 c2c4 b8c6 b1c3 d5c4 g1f3
FEN: r1bqkbnr/ppp1pppp/2n5/8/2pP4/2N2N2/PP2PPPP/R1BQKB1R b KQkq –

ECO: D07
Opening Name: Queen’s Gambit Declined: Chigorin Defense, Lazard Gambit
SAN: 1. d4 d5 2. c4 Nc6 3. Nf3 e5
UCI: d2d4 d7d5 c2c4 b8c6 g1f3 e7e5
FEN: r1bqkbnr/ppp2ppp/2n5/3pp3/2PP4/5N2/PP2PPPP/RNBQKB1R w KQkq –

ECO: D07
Opening Name: Queen’s Gambit Declined: Chigorin Defense, Main Line
SAN: 1. d4 d5 2. c4 Nc6 3. Nf3 Bg4
UCI: d2d4 d7d5 c2c4 b8c6 g1f3 c8g4
FEN: r2qkbnr/ppp1pppp/2n5/3p4/2PP2b1/5N2/PP2PPPP/RNBQKB1R w KQkq –

ECO: D07
Opening Name: Queen’s Gambit Declined: Chigorin Defense, Main Line, Alekhine Variation
SAN: 1. d4 d5 2. c4 Nc6 3. Nf3 Bg4 4. Qa4
UCI: d2d4 d7d5 c2c4 b8c6 g1f3 c8g4 d1a4
FEN: r2qkbnr/ppp1pppp/2n5/3p4/Q1PP2b1/5N2/PP2PPPP/RNB1KB1R b KQkq –

ECO: D07
Opening Name: Queen’s Gambit Declined: Chigorin Defense, Modern Gambit
SAN: 1. d4 d5 2. c4 Nc6 3. Nc3 dxc4 4. Nf3 Nf6
UCI: d2d4 d7d5 c2c4 b8c6 b1c3 d5c4 g1f3 g8f6
FEN: r1bqkb1r/ppp1pppp/2n2n2/8/2pP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq –

ECO: D07
Opening Name: Queen’s Gambit Declined: Chigorin Defense, Tartakower Gambit
SAN: 1. d4 d5 2. c4 Nc6 3. Nc3 e5
UCI: d2d4 d7d5 c2c4 b8c6 b1c3 e7e5
FEN: r1bqkbnr/ppp2ppp/2n5/3pp3/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq –

ECO: D08
Opening Name: Queen’s Gambit Declined: Albin Countergambit
SAN: 1. d4 d5 2. c4 e5
UCI: d2d4 d7d5 c2c4 e7e5
FEN: rnbqkbnr/ppp2ppp/8/3pp3/2PP4/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: D08
Opening Name: Queen’s Gambit Declined: Albin Countergambit, Balogh Variation
SAN: 1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. Nbd2 Qe7
UCI: d2d4 d7d5 c2c4 e7e5 d4e5 d5d4 g1f3 b8c6 b1d2 d8e7
FEN: r1b1kbnr/ppp1qppp/2n5/4P3/2Pp4/5N2/PP1NPPPP/R1BQKB1R w KQkq –

ECO: D08
Opening Name: Queen’s Gambit Declined: Albin Countergambit, Janowski Variation
SAN: 1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. Nbd2 f6
UCI: d2d4 d7d5 c2c4 e7e5 d4e5 d5d4 g1f3 b8c6 b1d2 f7f6
FEN: r1bqkbnr/ppp3pp/2n2p2/4P3/2Pp4/5N2/PP1NPPPP/R1BQKB1R w KQkq –

ECO: D08
Opening Name: Queen’s Gambit Declined: Albin Countergambit, Krenosz Variation
SAN: 1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. Nbd2 Bg4 6. h3 Bxf3 7. Nxf3 Bb4+ 8. Bd2 Qe7
UCI: d2d4 d7d5 c2c4 e7e5 d4e5 d5d4 g1f3 b8c6 b1d2 c8g4 h2h3 g4f3 d2f3 f8b4 c1d2 d8e7
FEN: r3k1nr/ppp1qppp/2n5/4P3/1bPp4/5N1P/PP1BPPP1/R2QKB1R w KQkq –

ECO: D08
Opening Name: Queen’s Gambit Declined: Albin Countergambit, Lasker Trap
SAN: 1. d4 d5 2. c4 e5 3. dxe5 d4 4. e3 Bb4+ 5. Bd2 dxe3
UCI: d2d4 d7d5 c2c4 e7e5 d4e5 d5d4 e2e3 f8b4 c1d2 d4e3
FEN: rnbqk1nr/ppp2ppp/8/4P3/1bP5/4p3/PP1B1PPP/RN1QKBNR w KQkq –

ECO: D08
Opening Name: Queen’s Gambit Declined: Albin Countergambit, Modern Line
SAN: 1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. Nbd2
UCI: d2d4 d7d5 c2c4 e7e5 d4e5 d5d4 g1f3 b8c6 b1d2
FEN: r1bqkbnr/ppp2ppp/2n5/4P3/2Pp4/5N2/PP1NPPPP/R1BQKB1R b KQkq –

ECO: D08
Opening Name: Queen’s Gambit Declined: Albin Countergambit, Normal Line
SAN: 1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3
UCI: d2d4 d7d5 c2c4 e7e5 d4e5 d5d4 g1f3
FEN: rnbqkbnr/ppp2ppp/8/4P3/2Pp4/5N2/PP2PPPP/RNBQKB1R b KQkq –

ECO: D08
Opening Name: Queen’s Gambit Declined: Albin Countergambit, Tartakower Defense
SAN: 1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 c5
UCI: d2d4 d7d5 c2c4 e7e5 d4e5 d5d4 g1f3 c7c5
FEN: rnbqkbnr/pp3ppp/8/2p1P3/2Pp4/5N2/PP2PPPP/RNBQKB1R w KQkq –

ECO: D09
Opening Name: Queen’s Gambit Declined: Albin Countergambit, Fianchetto Variation
SAN: 1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. g3
UCI: d2d4 d7d5 c2c4 e7e5 d4e5 d5d4 g1f3 b8c6 g2g3
FEN: r1bqkbnr/ppp2ppp/2n5/4P3/2Pp4/5NP1/PP2PP1P/RNBQKB1R b KQkq –

ECO: D09
Opening Name: Queen’s Gambit Declined: Albin Countergambit, Fianchetto Variation, Be6 Line
SAN: 1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. g3 Be6
UCI: d2d4 d7d5 c2c4 e7e5 d4e5 d5d4 g1f3 b8c6 g2g3 c8e6
FEN: r2qkbnr/ppp2ppp/2n1b3/4P3/2Pp4/5NP1/PP2PP1P/RNBQKB1R w KQkq –

ECO: D09
Opening Name: Queen’s Gambit Declined: Albin Countergambit, Fianchetto Variation, Bf5 Line
SAN: 1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. g3 Bf5
UCI: d2d4 d7d5 c2c4 e7e5 d4e5 d5d4 g1f3 b8c6 g2g3 c8f5
FEN: r2qkbnr/ppp2ppp/2n5/4Pb2/2Pp4/5NP1/PP2PP1P/RNBQKB1R w KQkq –

ECO: D09
Opening Name: Queen’s Gambit Declined: Albin Countergambit, Fianchetto Variation, Bg4 Line
SAN: 1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. g3 Bg4
UCI: d2d4 d7d5 c2c4 e7e5 d4e5 d5d4 g1f3 b8c6 g2g3 c8g4
FEN: r2qkbnr/ppp2ppp/2n5/4P3/2Pp2b1/5NP1/PP2PP1P/RNBQKB1R w KQkq –

ECO: D10
Opening Name: Slav Defense
SAN: 1. d4 d5 2. c4 c6
UCI: d2d4 d7d5 c2c4 c7c6
FEN: rnbqkbnr/pp2pppp/2p5/3p4/2PP4/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: D10
Opening Name: Slav Defense
SAN: 1. d4 d5 2. c4 c6 3. Nc3
UCI: d2d4 d7d5 c2c4 c7c6 b1c3
FEN: rnbqkbnr/pp2pppp/2p5/3p4/2PP4/2N5/PP2PPPP/R1BQKBNR b KQkq –

ECO: D10
Opening Name: Slav Defense
SAN: 1. d4 d5 2. c4 c6 3. Nc3 dxc4
UCI: d2d4 d7d5 c2c4 c7c6 b1c3 d5c4
FEN: rnbqkbnr/pp2pppp/2p5/8/2pP4/2N5/PP2PPPP/R1BQKBNR w KQkq –

ECO: D10
Opening Name: Slav Defense: Diemer Gambit
SAN: 1. d4 d5 2. c4 c6 3. e4
UCI: d2d4 d7d5 c2c4 c7c6 e2e4
FEN: rnbqkbnr/pp2pppp/2p5/3p4/2PPP3/8/PP3PPP/RNBQKBNR b KQkq –

ECO: D10
Opening Name: Slav Defense: Exchange Variation
SAN: 1. d4 d5 2. c4 c6 3. cxd5
UCI: d2d4 d7d5 c2c4 c7c6 c4d5
FEN: rnbqkbnr/pp2pppp/2p5/3P4/3P4/8/PP2PPPP/RNBQKBNR b KQkq –

ECO: D10
Opening Name: Slav Defense: Exchange Variation, Boor Attack
SAN: 1. d4 d5 2. c4 c6 3. cxd5 cxd5 4. Nc3 Nf6 5. f3
UCI: d2d4 d7d5 c2c4 c7c6 c4d5 c6d5 b1c3 g8f6 f2f3
FEN: rnbqkb1r/pp2pppp/5n2/3p4/3P4/2N2P2/PP2P1PP/R1BQKBNR b KQkq –

ECO: D10
Opening Name: Slav Defense: Slav Gambit, Alekhine Attack
SAN: 1. d4 d5 2. c4 c6 3. Nc3 dxc4 4. e4
UCI: d2d4 d7d5 c2c4 c7c6 b1c3 d5c4 e2e4
FEN: rnbqkbnr/pp2pppp/2p5/8/2pPP3/2N5/PP3PPP/R1BQKBNR b KQkq –

ECO: D10
Opening Name: Slav Defense: Winawer Countergambit
SAN: 1. d4 d5 2. c4 c6 3. Nc3 e5
UCI: d2d4 d7d5 c2c4 c7c6 b1c3 e7e5
FEN: rnbqkbnr/pp3ppp/2p5/3pp3/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq –

ECO: D10
Opening Name: Slav Defense: Winawer Countergambit, Anti-Winawer Gambit
SAN: 1. d4 d5 2. c4 c6 3. Nc3 e5 4. e4
UCI: d2d4 d7d5 c2c4 c7c6 b1c3 e7e5 e2e4
FEN: rnbqkbnr/pp3ppp/2p5/3pp3/2PPP3/2N5/PP3PPP/R1BQKBNR b KQkq –

ECO: D11
Opening Name: Slav Defense: Bonet Gambit
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Bg5
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 c1g5
FEN: rnbqkb1r/pp2pppp/2p2n2/3p2B1/2PP4/5N2/PP2PPPP/RN1QKB1R b KQkq –

ECO: D11
Opening Name: Slav Defense: Breyer Variation
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nbd2
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1d2
FEN: rnbqkb1r/pp2pppp/2p2n2/3p4/2PP4/5N2/PP1NPPPP/R1BQKB1R b KQkq –

ECO: D11
Opening Name: Slav Defense: Modern Line
SAN: 1. d4 d5 2. c4 c6 3. Nf3
UCI: d2d4 d7d5 c2c4 c7c6 g1f3
FEN: rnbqkbnr/pp2pppp/2p5/3p4/2PP4/5N2/PP2PPPP/RNBQKB1R b KQkq –

ECO: D11
Opening Name: Slav Defense: Modern Line
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. g3 dxc4 5. Bg2 g6
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 g2g3 d5c4 f1g2 g7g6
FEN: rnbqkb1r/pp2pp1p/2p2np1/8/2pP4/5NP1/PP2PPBP/RNBQK2R w KQkq –

ECO: D11
Opening Name: Slav Defense: Quiet Variation
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 e2e3
FEN: rnbqkb1r/pp2pppp/2p2n2/3p4/2PP4/4PN2/PP3PPP/RNBQKB1R b KQkq –

ECO: D11
Opening Name: Slav Defense: Quiet Variation, Pin Defense
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bg4
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 e2e3 c8g4
FEN: rn1qkb1r/pp2pppp/2p2n2/3p4/2PP2b1/4PN2/PP3PPP/RNBQKB1R w KQkq –

ECO: D12
Opening Name: Slav Defense: Quiet Variation, Amsterdam Variation
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bf5 5. cxd5 cxd5 6. Nc3 e6 7. Ne5 Nfd7
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 e2e3 c8f5 c4d5 c6d5 b1c3 e7e6 f3e5 f6d7
FEN: rn1qkb1r/pp1n1ppp/4p3/3pNb2/3P4/2N1P3/PP3PPP/R1BQKB1R w KQkq –

ECO: D12
Opening Name: Slav Defense: Quiet Variation, Landau Variation
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bf5 5. cxd5 cxd5 6. Qb3 Qc8 7. Bd2 e6 8. Na3
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 e2e3 c8f5 c4d5 c6d5 d1b3 d8c8 c1d2 e7e6 b1a3
FEN: rnq1kb1r/pp3ppp/4pn2/3p1b2/3P4/NQ2PN2/PP1B1PPP/R3KB1R b KQkq –

ECO: D12
Opening Name: Slav Defense: Quiet Variation, Schallopp Defense
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bf5
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 e2e3 c8f5
FEN: rn1qkb1r/pp2pppp/2p2n2/3p1b2/2PP4/4PN2/PP3PPP/RNBQKB1R w KQkq –

ECO: D13
Opening Name: Slav Defense: Exchange Variation
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. cxd5 cxd5
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 c4d5 c6d5
FEN: rnbqkb1r/pp2pppp/5n2/3p4/3P4/5N2/PP2PPPP/RNBQKB1R w KQkq –

ECO: D13
Opening Name: Slav Defense: Exchange Variation, Schallopp Variation
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bf5 5. cxd5 cxd5 6. Nc3
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 e2e3 c8f5 c4d5 c6d5 b1c3
FEN: rn1qkb1r/pp2pppp/5n2/3p1b2/3P4/2N1PN2/PP3PPP/R1BQKB1R b KQkq –

ECO: D14
Opening Name: Slav Defense: Exchange Variation, Symmetrical Line
SAN: 1. d4 d5 2. c4 c6 3. cxd5 cxd5 4. Nc3 Nf6 5. Nf3 Nc6 6. Bf4 Bf5
UCI: d2d4 d7d5 c2c4 c7c6 c4d5 c6d5 b1c3 g8f6 g1f3 b8c6 c1f4 c8f5
FEN: r2qkb1r/pp2pppp/2n2n2/3p1b2/3P1B2/2N2N2/PP2PPPP/R2QKB1R w KQkq –

ECO: D14
Opening Name: Slav Defense: Exchange Variation, Trifunovic Variation
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. cxd5 cxd5 5. Nc3 Nc6 6. Bf4 Bf5 7. e3 e6 8. Qb3 Bb4
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 c4d5 c6d5 b1c3 b8c6 c1f4 c8f5 e2e3 e7e6 d1b3 f8b4
FEN: r2qk2r/pp3ppp/2n1pn2/3p1b2/1b1P1B2/1QN1PN2/PP3PPP/R3KB1R w KQkq –

ECO: D15
Opening Name: Slav Defense: Alekhine Variation
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. e3
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 e2e3
FEN: rnbqkb1r/pp2pppp/2p2n2/8/2pP4/2N1PN2/PP3PPP/R1BQKB1R b KQkq –

ECO: D15
Opening Name: Slav Defense: Chebanenko Variation
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 a6
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 a7a6
FEN: rnbqkb1r/1p2pppp/p1p2n2/3p4/2PP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq –

ECO: D15
Opening Name: Slav Defense: Chebanenko Variation, Advance System
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 a6 5. c5
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 a7a6 c4c5
FEN: rnbqkb1r/1p2pppp/p1p2n2/2Pp4/3P4/2N2N2/PP2PPPP/R1BQKB1R b KQkq –

ECO: D15
Opening Name: Slav Defense: Geller Gambit
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. e4
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 e2e4
FEN: rnbqkb1r/pp2pppp/2p2n2/8/2pPP3/2N2N2/PP3PPP/R1BQKB1R b KQkq –

ECO: D15
Opening Name: Slav Defense: Geller Gambit
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. e4 b5 6. e5
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 e2e4 b7b5 e4e5
FEN: rnbqkb1r/p3pppp/2p2n2/1p2P3/2pP4/2N2N2/PP3PPP/R1BQKB1R b KQkq –

ECO: D15
Opening Name: Slav Defense: Schlechter Variation
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 g6
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 g7g6
FEN: rnbqkb1r/pp2pp1p/2p2np1/3p4/2PP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq –

ECO: D15
Opening Name: Slav Defense: Süchting Variation
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 Qb6
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d8b6
FEN: rnb1kb1r/pp2pppp/1qp2n2/3p4/2PP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq –

ECO: D15
Opening Name: Slav Defense: Three Knights Variation
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3
FEN: rnbqkb1r/pp2pppp/2p2n2/3p4/2PP4/2N2N2/PP2PPPP/R1BQKB1R b KQkq –

ECO: D15
Opening Name: Slav Defense: Two Knights Attack
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4
FEN: rnbqkb1r/pp2pppp/2p2n2/8/2pP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq –

ECO: D16
Opening Name: Slav Defense: Alapin Variation
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4
FEN: rnbqkb1r/pp2pppp/2p2n2/8/P1pP4/2N2N2/1P2PPPP/R1BQKB1R b KQkq –

ECO: D16
Opening Name: Slav Defense: Smyslov Variation
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Na6
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 b8a6
FEN: r1bqkb1r/pp2pppp/n1p2n2/8/P1pP4/2N2N2/1P2PPPP/R1BQKB1R w KQkq –

ECO: D16
Opening Name: Slav Defense: Soultanbeieff Variation
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 e6
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 e7e6
FEN: rnbqkb1r/pp3ppp/2p1pn2/8/P1pP4/2N2N2/1P2PPPP/R1BQKB1R w KQkq –

ECO: D16
Opening Name: Slav Defense: Steiner Variation
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bg4
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 c8g4
FEN: rn1qkb1r/pp2pppp/2p2n2/8/P1pP2b1/2N2N2/1P2PPPP/R1BQKB1R w KQkq –

ECO: D17
Opening Name: Slav Defense: Czech Variation
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 c8f5
FEN: rn1qkb1r/pp2pppp/2p2n2/5b2/P1pP4/2N2N2/1P2PPPP/R1BQKB1R w KQkq –

ECO: D17
Opening Name: Slav Defense: Czech Variation, Bled Attack
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. Nh4
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 c8f5 f3h4
FEN: rn1qkb1r/pp2pppp/2p2n2/5b2/P1pP3N/2N5/1P2PPPP/R1BQKB1R b KQkq –

ECO: D17
Opening Name: Slav Defense: Czech Variation, Carlsbad Variation
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. Ne5 Nbd7 7. Nxc4 Qc7 8. g3 e5
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 c8f5 f3e5 b8d7 e5c4 d8c7 g2g3 e7e5
FEN: r3kb1r/ppqn1ppp/2p2n2/4pb2/P1NP4/2N3P1/1P2PP1P/R1BQKB1R w KQkq –

ECO: D17
Opening Name: Slav Defense: Czech Variation, Carlsbad Variation, Morozevich Variation
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. Ne5 Nbd7 7. Nxc4 Qc7 8. g3 e5 9. dxe5 Nxe5 10. Bf4 Nfd7 11. Bg2 g5
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 c8f5 f3e5 b8d7 e5c4 d8c7 g2g3 e7e5 d4e5 d7e5 c1f4 f6d7 f1g2 g7g5
FEN: r3kb1r/ppqn1p1p/2p5/4nbp1/P1N2B2/2N3P1/1P2PPBP/R2QK2R w KQkq –

ECO: D17
Opening Name: Slav Defense: Czech Variation, Krause Attack
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. Ne5
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 c8f5 f3e5
FEN: rn1qkb1r/pp2pppp/2p2n2/4Nb2/P1pP4/2N5/1P2PPPP/R1BQKB1R b KQkq –

ECO: D17
Opening Name: Slav Defense: Czech Variation, Krause Attack, Fazekas Gambit
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. Ne5 Na6 7. e4
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 c8f5 f3e5 b8a6 e2e4
FEN: r2qkb1r/pp2pppp/n1p2n2/4Nb2/P1pPP3/2N5/1P3PPP/R1BQKB1R b KQkq –

ECO: D17
Opening Name: Slav Defense: Czech Variation, Wiesbaden Variation
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. Ne5 e6
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 c8f5 f3e5 e7e6
FEN: rn1qkb1r/pp3ppp/2p1pn2/4Nb2/P1pP4/2N5/1P2PPPP/R1BQKB1R w KQkq –

ECO: D17
Opening Name: Slav Defense: Czech Variation, Wiesbaden Variation, Sharp Line
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. Ne5 e6 7. f3 Bb4 8. e4
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 c8f5 f3e5 e7e6 f2f3 f8b4 e2e4
FEN: rn1qk2r/pp3ppp/2p1pn2/4Nb2/PbpPP3/2N2P2/1P4PP/R1BQKB1R b KQkq –

ECO: D18
Opening Name: Slav Defense: Czech Variation, Classical System
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 c8f5 e2e3
FEN: rn1qkb1r/pp2pppp/2p2n2/5b2/P1pP4/2N1PN2/1P3PPP/R1BQKB1R b KQkq –

ECO: D18
Opening Name: Slav Defense: Czech Variation, Lasker Variation
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3 Na6
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 c8f5 e2e3 b8a6
FEN: r2qkb1r/pp2pppp/n1p2n2/5b2/P1pP4/2N1PN2/1P3PPP/R1BQKB1R w KQkq –

ECO: D19
Opening Name: Slav Defense: Czech Variation, Classical System, Main Line
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3 e6 7. Bxc4 Bb4 8. O-O O-O 9. Qe2
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 c8f5 e2e3 e7e6 f1c4 f8b4 e1g1 e8g8 d1e2
FEN: rn1q1rk1/pp3ppp/2p1pn2/5b2/PbBP4/2N1PN2/1P2QPPP/R1B2RK1 b – –

ECO: D19
Opening Name: Slav Defense: Czech Variation, Dutch Variation
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3 e6 7. Bxc4 Bb4 8. O-O
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 c8f5 e2e3 e7e6 f1c4 f8b4 e1g1
FEN: rn1qk2r/pp3ppp/2p1pn2/5b2/PbBP4/2N1PN2/1P3PPP/R1BQ1RK1 b kq –

ECO: D19
Opening Name: Slav Defense: Czech Variation, Dutch Variation, Sämisch Variation
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3 e6 7. Bxc4 Bb4 8. O-O O-O 9. Qe2 Ne4 10. g4
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 c8f5 e2e3 e7e6 f1c4 f8b4 e1g1 e8g8 d1e2 f6e4 g2g4
FEN: rn1q1rk1/pp3ppp/2p1p3/5b2/PbBPn1P1/2N1PN2/1P2QP1P/R1B2RK1 b – –

ECO: D20
Opening Name: Queen’s Gambit Accepted
SAN: 1. d4 d5 2. c4 dxc4
UCI: d2d4 d7d5 c2c4 d5c4
FEN: rnbqkbnr/ppp1pppp/8/8/2pP4/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: D20
Opening Name: Queen’s Gambit Accepted: Accelerated Mannheim Variation
SAN: 1. d4 d5 2. c4 dxc4 3. Qa4+
UCI: d2d4 d7d5 c2c4 d5c4 d1a4
FEN: rnbqkbnr/ppp1pppp/8/8/Q1pP4/8/PP2PPPP/RNB1KBNR b KQkq –

ECO: D20
Opening Name: Queen’s Gambit Accepted: Central Variation, Alekhine System
SAN: 1. d4 d5 2. c4 dxc4 3. e4 Nf6
UCI: d2d4 d7d5 c2c4 d5c4 e2e4 g8f6
FEN: rnbqkb1r/ppp1pppp/5n2/8/2pPP3/8/PP3PPP/RNBQKBNR w KQkq –

ECO: D20
Opening Name: Queen’s Gambit Accepted: Central Variation, Greco Variation
SAN: 1. d4 d5 2. c4 dxc4 3. e4 b5
UCI: d2d4 d7d5 c2c4 d5c4 e2e4 b7b5
FEN: rnbqkbnr/p1p1pppp/8/1p6/2pPP3/8/PP3PPP/RNBQKBNR w KQkq –

ECO: D20
Opening Name: Queen’s Gambit Accepted: Central Variation, McDonnell Defense
SAN: 1. d4 d5 2. c4 dxc4 3. e4 e5
UCI: d2d4 d7d5 c2c4 d5c4 e2e4 e7e5
FEN: rnbqkbnr/ppp2ppp/8/4p3/2pPP3/8/PP3PPP/RNBQKBNR w KQkq –

ECO: D20
Opening Name: Queen’s Gambit Accepted: Central Variation, McDonnell Defense, Somov Gambit
SAN: 1. d4 d5 2. c4 dxc4 3. e4 e5 4. Bxc4
UCI: d2d4 d7d5 c2c4 d5c4 e2e4 e7e5 f1c4
FEN: rnbqkbnr/ppp2ppp/8/4p3/2BPP3/8/PP3PPP/RNBQK1NR b KQkq –

ECO: D20
Opening Name: Queen’s Gambit Accepted: Central Variation, Modern Defense
SAN: 1. d4 d5 2. c4 dxc4 3. e4 Nc6
UCI: d2d4 d7d5 c2c4 d5c4 e2e4 b8c6
FEN: r1bqkbnr/ppp1pppp/2n5/8/2pPP3/8/PP3PPP/RNBQKBNR w KQkq –

ECO: D20
Opening Name: Queen’s Gambit Accepted: Central Variation, Rubinstein Defense
SAN: 1. d4 d5 2. c4 dxc4 3. e4 c5
UCI: d2d4 d7d5 c2c4 d5c4 e2e4 c7c5
FEN: rnbqkbnr/pp2pppp/8/2p5/2pPP3/8/PP3PPP/RNBQKBNR w KQkq –

ECO: D20
Opening Name: Queen’s Gambit Accepted: Central Variation, Rubinstein Defense, Yefimov Gambit
SAN: 1. d4 d5 2. c4 dxc4 3. e4 c5 4. d5 b5
UCI: d2d4 d7d5 c2c4 d5c4 e2e4 c7c5 d4d5 b7b5
FEN: rnbqkbnr/p3pppp/8/1ppP4/2p1P3/8/PP3PPP/RNBQKBNR w KQkq –

ECO: D20
Opening Name: Queen’s Gambit Accepted: Linares Variation
SAN: 1. d4 d5 2. c4 dxc4 3. e4 c5 4. d5 Nf6 5. Nc3 b5
UCI: d2d4 d7d5 c2c4 d5c4 e2e4 c7c5 d4d5 g8f6 b1c3 b7b5
FEN: rnbqkb1r/p3pppp/5n2/1ppP4/2p1P3/2N5/PP3PPP/R1BQKBNR w KQkq –

ECO: D20
Opening Name: Queen’s Gambit Accepted: Old Variation
SAN: 1. d4 d5 2. c4 dxc4 3. e3
UCI: d2d4 d7d5 c2c4 d5c4 e2e3
FEN: rnbqkbnr/ppp1pppp/8/8/2pP4/4P3/PP3PPP/RNBQKBNR b KQkq –

ECO: D20
Opening Name: Queen’s Gambit Accepted: Old Variation, Billinger Gambit
SAN: 1. d4 d5 2. c4 dxc4 3. e3 e5 4. Bxc4 exd4 5. Qb3 Qe7 6. a3
UCI: d2d4 d7d5 c2c4 d5c4 e2e3 e7e5 f1c4 e5d4 d1b3 d8e7 a2a3
FEN: rnb1kbnr/ppp1qppp/8/8/2Bp4/PQ2P3/1P3PPP/RNB1K1NR b KQkq –

ECO: D20
Opening Name: Queen’s Gambit Accepted: Old Variation, Christensen Gambit
SAN: 1. d4 d5 2. c4 dxc4 3. e3 e5 4. Bxc4 exd4 5. Qb3 Qe7 6. Nf3
UCI: d2d4 d7d5 c2c4 d5c4 e2e3 e7e5 f1c4 e5d4 d1b3 d8e7 g1f3
FEN: rnb1kbnr/ppp1qppp/8/8/2Bp4/1Q2PN2/PP3PPP/RNB1K2R b KQkq –

ECO: D20
Opening Name: Queen’s Gambit Accepted: Old Variation, Korchnoi Gambit
SAN: 1. d4 d5 2. c4 dxc4 3. e3 e5 4. Bxc4 exd4 5. Qb3 Qe7 6. Kf1
UCI: d2d4 d7d5 c2c4 d5c4 e2e3 e7e5 f1c4 e5d4 d1b3 d8e7 e1f1
FEN: rnb1kbnr/ppp1qppp/8/8/2Bp4/1Q2P3/PP3PPP/RNB2KNR b kq –

ECO: D20
Opening Name: Queen’s Gambit Accepted: Old Variation, Novikov Gambit
SAN: 1. d4 d5 2. c4 dxc4 3. e3 e5 4. Bxc4 exd4 5. Qb3 Qe7 6. Nd2
UCI: d2d4 d7d5 c2c4 d5c4 e2e3 e7e5 f1c4 e5d4 d1b3 d8e7 b1d2
FEN: rnb1kbnr/ppp1qppp/8/8/2Bp4/1Q2P3/PP1N1PPP/R1B1K1NR b KQkq –

ECO: D20
Opening Name: Queen’s Gambit Accepted: Saduleto Variation
SAN: 1. d4 d5 2. c4 dxc4 3. e4
UCI: d2d4 d7d5 c2c4 d5c4 e2e4
FEN: rnbqkbnr/ppp1pppp/8/8/2pPP3/8/PP3PPP/RNBQKBNR b KQkq –

ECO: D20
Opening Name: Queen’s Gambit Accepted: Schwartz Defense
SAN: 1. d4 d5 2. c4 dxc4 3. e4 f5
UCI: d2d4 d7d5 c2c4 d5c4 e2e4 f7f5
FEN: rnbqkbnr/ppp1p1pp/8/5p2/2pPP3/8/PP3PPP/RNBQKBNR w KQkq –

ECO: D21
Opening Name: Queen’s Gambit Accepted: Alekhine Defense, Borisenko-Furman Variation
SAN: 1. d4 d5 2. c4 dxc4 3. Nf3 a6 4. e4
UCI: d2d4 d7d5 c2c4 d5c4 g1f3 a7a6 e2e4
FEN: rnbqkbnr/1pp1pppp/p7/8/2pPP3/5N2/PP3PPP/RNBQKB1R b KQkq –

ECO: D21
Opening Name: Queen’s Gambit Accepted: Godes Variation
SAN: 1. d4 d5 2. c4 dxc4 3. Nf3 Nd7
UCI: d2d4 d7d5 c2c4 d5c4 g1f3 b8d7
FEN: r1bqkbnr/pppnpppp/8/8/2pP4/5N2/PP2PPPP/RNBQKB1R w KQkq –

ECO: D21
Opening Name: Queen’s Gambit Accepted: Gunsberg Defense
SAN: 1. d4 d5 2. c4 dxc4 3. Nf3 c5
UCI: d2d4 d7d5 c2c4 d5c4 g1f3 c7c5
FEN: rnbqkbnr/pp2pppp/8/2p5/2pP4/5N2/PP2PPPP/RNBQKB1R w KQkq –

ECO: D21
Opening Name: Queen’s Gambit Accepted: Normal Variation
SAN: 1. d4 d5 2. c4 dxc4 3. Nf3
UCI: d2d4 d7d5 c2c4 d5c4 g1f3
FEN: rnbqkbnr/ppp1pppp/8/8/2pP4/5N2/PP2PPPP/RNBQKB1R b KQkq –

ECO: D21
Opening Name: Queen’s Gambit Accepted: Rosenthal Variation
SAN: 1. d4 d5 2. c4 dxc4 3. Nf3 e6
UCI: d2d4 d7d5 c2c4 d5c4 g1f3 e7e6
FEN: rnbqkbnr/ppp2ppp/4p3/8/2pP4/5N2/PP2PPPP/RNBQKB1R w KQkq –

ECO: D21
Opening Name: Queen’s Gambit Accepted: Slav Gambit
SAN: 1. d4 d5 2. c4 dxc4 3. Nf3 b5
UCI: d2d4 d7d5 c2c4 d5c4 g1f3 b7b5
FEN: rnbqkbnr/p1p1pppp/8/1p6/2pP4/5N2/PP2PPPP/RNBQKB1R w KQkq –

ECO: D22
Opening Name: Queen’s Gambit Accepted: Alekhine Defense
SAN: 1. d4 d5 2. c4 dxc4 3. Nf3 a6
UCI: d2d4 d7d5 c2c4 d5c4 g1f3 a7a6
FEN: rnbqkbnr/1pp1pppp/p7/8/2pP4/5N2/PP2PPPP/RNBQKB1R w KQkq –

ECO: D22
Opening Name: Queen’s Gambit Accepted: Alekhine Defense, Alatortsev Variation
SAN: 1. d4 d5 2. c4 dxc4 3. Nf3 a6 4. e3 Bg4 5. Bxc4 e6 6. d5
UCI: d2d4 d7d5 c2c4 d5c4 g1f3 a7a6 e2e3 c8g4 f1c4 e7e6 d4d5
FEN: rn1qkbnr/1pp2ppp/p3p3/3P4/2B3b1/4PN2/PP3PPP/RNBQK2R b KQkq –

ECO: D22
Opening Name: Queen’s Gambit Accepted: Alekhine Defense, Haberditz Variation
SAN: 1. d4 d5 2. c4 dxc4 3. Nf3 a6 4. e3 b5
UCI: d2d4 d7d5 c2c4 d5c4 g1f3 a7a6 e2e3 b7b5
FEN: rnbqkbnr/2p1pppp/p7/1p6/2pP4/4PN2/PP3PPP/RNBQKB1R w KQkq –

ECO: D23
Opening Name: Queen’s Gambit Accepted
SAN: 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6
UCI: d2d4 d7d5 c2c4 d5c4 g1f3 g8f6
FEN: rnbqkb1r/ppp1pppp/5n2/8/2pP4/5N2/PP2PPPP/RNBQKB1R w KQkq –

ECO: D23
Opening Name: Queen’s Gambit Accepted: Mannheim Variation
SAN: 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. Qa4+
UCI: d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 d1a4
FEN: rnbqkb1r/ppp1pppp/5n2/8/Q1pP4/5N2/PP2PPPP/RNB1KB1R b KQkq –

ECO: D24
Opening Name: Queen’s Gambit Accepted: Bogoljubow Defense
SAN: 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. Nc3 a6 5. e4
UCI: d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 b1c3 a7a6 e2e4
FEN: rnbqkb1r/1pp1pppp/p4n2/8/2pPP3/2N2N2/PP3PPP/R1BQKB1R b KQkq –

ECO: D24
Opening Name: Queen’s Gambit Accepted: Gunsberg Defense, Prianishenmo Gambit
SAN: 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. Nc3 c5 5. d5 e6 6. e4 exd5 7. e5
UCI: d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 b1c3 c7c5 d4d5 e7e6 e2e4 e6d5 e4e5
FEN: rnbqkb1r/pp3ppp/5n2/2ppP3/2p5/2N2N2/PP3PPP/R1BQKB1R b KQkq –

ECO: D24
Opening Name: Queen’s Gambit Accepted: Showalter Variation
SAN: 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. Nc3
UCI: d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 b1c3
FEN: rnbqkb1r/ppp1pppp/5n2/8/2pP4/2N2N2/PP2PPPP/R1BQKB1R b KQkq –

ECO: D25
Opening Name: Queen’s Gambit Accepted: Janowski-Larsen Variation
SAN: 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 Bg4
UCI: d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 c8g4
FEN: rn1qkb1r/ppp1pppp/5n2/8/2pP2b1/4PN2/PP3PPP/RNBQKB1R w KQkq –

ECO: D25
Opening Name: Queen’s Gambit Accepted: Normal Variation
SAN: 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3
UCI: d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3
FEN: rnbqkb1r/ppp1pppp/5n2/8/2pP4/4PN2/PP3PPP/RNBQKB1R b KQkq –

ECO: D25
Opening Name: Queen’s Gambit Accepted: Smyslov Variation
SAN: 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 g6
UCI: d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 g7g6
FEN: rnbqkb1r/ppp1pp1p/5np1/8/2pP4/4PN2/PP3PPP/RNBQKB1R w KQkq –

ECO: D25
Opening Name: Queen’s Gambit Accepted: Winawer Defense
SAN: 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 Be6
UCI: d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 c8e6
FEN: rn1qkb1r/ppp1pppp/4bn2/8/2pP4/4PN2/PP3PPP/RNBQKB1R w KQkq –

ECO: D26
Opening Name: Queen’s Gambit Accepted: Classical Defense
SAN: 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5
UCI: d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 c7c5
FEN: rnbqkb1r/pp3ppp/4pn2/2p5/2BP4/4PN2/PP3PPP/RNBQK2R w KQkq –

ECO: D26
Opening Name: Queen’s Gambit Accepted: Classical Defense, Normal Line
SAN: 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O
UCI: d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 c7c5 e1g1
FEN: rnbqkb1r/pp3ppp/4pn2/2p5/2BP4/4PN2/PP3PPP/RNBQ1RK1 b kq –

ECO: D26
Opening Name: Queen’s Gambit Accepted: Classical Defense, Steinitz Variation, Development Variation
SAN: 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O Nc6
UCI: d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 c7c5 e1g1 b8c6
FEN: r1bqkb1r/pp3ppp/2n1pn2/2p5/2BP4/4PN2/PP3PPP/RNBQ1RK1 w kq –

ECO: D26
Opening Name: Queen’s Gambit Accepted: Classical Defense, Steinitz Variation, Exchange Variation
SAN: 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O cxd4
UCI: d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 c7c5 e1g1 c5d4
FEN: rnbqkb1r/pp3ppp/4pn2/8/2Bp4/4PN2/PP3PPP/RNBQ1RK1 w kq –

ECO: D26
Opening Name: Queen’s Gambit Accepted: Classical, Furman Variation
SAN: 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. Qe2 a6 7. dxc5 Bxc5 8. O-O Nc6 9. e4 b5 10. e5
UCI: d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 c7c5 d1e2 a7a6 d4c5 f8c5 e1g1 b8c6 e3e4 b7b5 e4e5
FEN: r1bqk2r/5ppp/p1n1pn2/1pb1P3/2B5/5N2/PP2QPPP/RNB2RK1 b kq –

ECO: D26
Opening Name: Queen’s Gambit Accepted: Normal Variation, Traditional System
SAN: 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6
UCI: d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6
FEN: rnbqkb1r/ppp2ppp/4pn2/8/2pP4/4PN2/PP3PPP/RNBQKB1R w KQkq –

ECO: D27
Opening Name: Queen’s Gambit Accepted: Classical Defense, Main Line
SAN: 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6
UCI: d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 c7c5 e1g1 a7a6
FEN: rnbqkb1r/1p3ppp/p3pn2/2p5/2BP4/4PN2/PP3PPP/RNBQ1RK1 w kq –

ECO: D27
Opening Name: Queen’s Gambit Accepted: Classical Defense, Rubinstein Variation
SAN: 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. a4
UCI: d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 c7c5 e1g1 a7a6 a2a4
FEN: rnbqkb1r/1p3ppp/p3pn2/2p5/P1BP4/4PN2/1P3PPP/RNBQ1RK1 b kq –

ECO: D27
Opening Name: Queen’s Gambit Accepted: Classical Defense, Russian Gambit
SAN: 1. d4 d5 2. c4 dxc4 3. e3 Nf6 4. Bxc4 e6 5. Nf3 c5 6. O-O a6 7. e4
UCI: d2d4 d7d5 c2c4 d5c4 e2e3 g8f6 f1c4 e7e6 g1f3 c7c5 e1g1 a7a6 e3e4
FEN: rnbqkb1r/1p3ppp/p3pn2/2p5/2BPP3/5N2/PP3PPP/RNBQ1RK1 b kq –

ECO: D27
Opening Name: Queen’s Gambit Accepted: Furman Variation
SAN: 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. dxc5 Bxc5
UCI: d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 c7c5 e1g1 a7a6 d4c5 f8c5
FEN: rnbqk2r/1p3ppp/p3pn2/2b5/2B5/4PN2/PP3PPP/RNBQ1RK1 w kq –

ECO: D28
Opening Name: Queen’s Gambit Accepted: Classical Defense, Alekhine System
SAN: 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2
UCI: d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 c7c5 e1g1 a7a6 d1e2
FEN: rnbqkb1r/1p3ppp/p3pn2/2p5/2BP4/4PN2/PP2QPPP/RNB2RK1 b kq –

ECO: D28
Opening Name: Queen’s Gambit Accepted: Classical Defense, Alekhine System
SAN: 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5
UCI: d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 c7c5 e1g1 a7a6 d1e2 b7b5
FEN: rnbqkb1r/5ppp/p3pn2/1pp5/2BP4/4PN2/PP2QPPP/RNB2RK1 w kq –

ECO: D28
Opening Name: Queen’s Gambit Accepted: Classical, Flohr Variation
SAN: 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Nc6 9. Rd1 c4 10. Bc2 Nb4 11. Nc3 Nxc2 12. Qxc2 Bb7 13. d5 Qc7
UCI: d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 c7c5 e1g1 a7a6 d1e2 b7b5 c4b3 b8c6 f1d1 c5c4 b3c2 c6b4 b1c3 b4c2 e2c2 c8b7 d4d5 d8c7
FEN: r3kb1r/1bq2ppp/p3pn2/1p1P4/2p5/2N1PN2/PPQ2PPP/R1BR2K1 w kq –

ECO: D29
Opening Name: Queen’s Gambit Accepted: Classical Defense, Alekhine System, Main Line
SAN: 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7
UCI: d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 c7c5 e1g1 a7a6 d1e2 b7b5 c4b3 c8b7
FEN: rn1qkb1r/1b3ppp/p3pn2/1pp5/3P4/1B2PN2/PP2QPPP/RNB2RK1 w kq –

ECO: D29
Opening Name: Queen’s Gambit Accepted: Classical Defense, Alekhine System, Smyslov Variation
SAN: 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7 9. Rd1 Nbd7 10. Nc3 Bd6
UCI: d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 c7c5 e1g1 a7a6 d1e2 b7b5 c4b3 c8b7 f1d1 b8d7 b1c3 f8d6
FEN: r2qk2r/1b1n1ppp/p2bpn2/1pp5/3P4/1BN1PN2/PP2QPPP/R1BR2K1 w kq –

ECO: D30
Opening Name: Queen’s Gambit Declined
SAN: 1. d4 d5 2. c4 e6
UCI: d2d4 d7d5 c2c4 e7e6
FEN: rnbqkbnr/ppp2ppp/4p3/3p4/2PP4/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: D30
Opening Name: Queen’s Gambit Declined: Capablanca Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Bg5 h6
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 c1g5 h7h6
FEN: rnbqkb1r/ppp2pp1/4pn1p/3p2B1/2PP4/5N2/PP2PPPP/RN1QKB1R w KQkq –

ECO: D30
Opening Name: Queen’s Gambit Declined: Capablanca Variation
SAN: 1. d4 Nf6 2. Nf3 e6 3. c4 d5 4. Bg5 c6 5. Nbd2 Nbd7 6. e3
UCI: d2d4 g8f6 g1f3 e7e6 c2c4 d7d5 c1g5 c7c6 b1d2 b8d7 e2e3
FEN: r1bqkb1r/pp1n1ppp/2p1pn2/3p2B1/2PP4/4PN2/PP1N1PPP/R2QKB1R b KQkq –

ECO: D30
Opening Name: Queen’s Gambit Declined: Semmering Variation
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 e6 5. Nbd2 Nbd7 6. Bd3 c5
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 e2e3 e7e6 b1d2 b8d7 f1d3 c6c5
FEN: r1bqkb1r/pp1n1ppp/4pn2/2pp4/2PP4/3BPN2/PP1N1PPP/R1BQK2R w KQkq –

ECO: D30
Opening Name: Queen’s Gambit Declined: Spielmann Variation
SAN: 1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. e3 c6 5. Nbd2 g6
UCI: d2d4 d7d5 c2c4 e7e6 g1f3 g8f6 e2e3 c7c6 b1d2 g7g6
FEN: rnbqkb1r/pp3p1p/2p1pnp1/3p4/2PP4/4PN2/PP1N1PPP/R1BQKB1R w KQkq –

ECO: D30
Opening Name: Queen’s Gambit Declined: Stonewall Variation
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 e6 5. Nbd2 Ne4 6. Bd3 f5
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 e2e3 e7e6 b1d2 f6e4 f1d3 f7f5
FEN: rnbqkb1r/pp4pp/2p1p3/3p1p2/2PPn3/3BPN2/PP1N1PPP/R1BQK2R w KQkq –

ECO: D30
Opening Name: Queen’s Gambit Declined: Tarrasch Defense, Pseudo-Tarrasch
SAN: 1. d4 d5 2. c4 e6 3. Nf3 c5
UCI: d2d4 d7d5 c2c4 e7e6 g1f3 c7c5
FEN: rnbqkbnr/pp3ppp/4p3/2pp4/2PP4/5N2/PP2PPPP/RNBQKB1R w KQkq –

ECO: D30
Opening Name: Queen’s Gambit Declined: Tarrasch Defense, Pseudo-Tarrasch Bishop Attack
SAN: 1. d4 d5 2. c4 e6 3. Nf3 c5 4. cxd5 exd5 5. Bg5
UCI: d2d4 d7d5 c2c4 e7e6 g1f3 c7c5 c4d5 e6d5 c1g5
FEN: rnbqkbnr/pp3ppp/8/2pp2B1/3P4/5N2/PP2PPPP/RN1QKB1R b KQkq –

ECO: D30
Opening Name: Queen’s Gambit Declined: Traditional Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Bg5
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 c1g5
FEN: rnbqkb1r/ppp2ppp/4pn2/3p2B1/2PP4/5N2/PP2PPPP/RN1QKB1R b KQkq –

ECO: D30
Opening Name: Queen’s Gambit Declined: Vienna Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Bg5 Bb4+
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 c1g5 f8b4
FEN: rnbqk2r/ppp2ppp/4pn2/3p2B1/1bPP4/5N2/PP2PPPP/RN1QKB1R w KQkq –

ECO: D30
Opening Name: Semi-Slav Defense: Quiet Variation
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 e6 5. Nbd2
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 e2e3 e7e6 b1d2
FEN: rnbqkb1r/pp3ppp/2p1pn2/3p4/2PP4/4PN2/PP1N1PPP/R1BQKB1R b KQkq –

ECO: D30
Opening Name: Semi-Slav Defense: Quiet Variation
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 e6 5. Nbd2 Nbd7
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 e2e3 e7e6 b1d2 b8d7
FEN: r1bqkb1r/pp1n1ppp/2p1pn2/3p4/2PP4/4PN2/PP1N1PPP/R1BQKB1R w KQkq –

ECO: D31
Opening Name: Queen’s Gambit Declined: Alapin Variation
SAN: 1. d4 e6 2. c4 b6 3. Nc3 d5
UCI: d2d4 e7e6 c2c4 b7b6 b1c3 d7d5
FEN: rnbqkbnr/p1p2ppp/1p2p3/3p4/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq –

ECO: D31
Opening Name: Queen’s Gambit Declined: Charousek Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Be7
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 f8e7
FEN: rnbqk1nr/ppp1bppp/4p3/3p4/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq –

ECO: D31
Opening Name: Queen’s Gambit Declined: Charousek Variation, Miladinovic Gambit
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Be7 4. e4 dxe4 5. f3
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 f8e7 e2e4 d5e4 f2f3
FEN: rnbqk1nr/ppp1bppp/4p3/8/2PPp3/2N2P2/PP4PP/R1BQKBNR b KQkq –

ECO: D31
Opening Name: Queen’s Gambit Declined: Janowski Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 a6
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 a7a6
FEN: rnbqkbnr/1pp2ppp/p3p3/3p4/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq –

ECO: D31
Opening Name: Queen’s Gambit Declined: Queen’s Knight Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3
UCI: d2d4 d7d5 c2c4 e7e6 b1c3
FEN: rnbqkbnr/ppp2ppp/4p3/3p4/2PP4/2N5/PP2PPPP/R1BQKBNR b KQkq –

ECO: D31
Opening Name: Queen’s Gambit Declined: Semi-Slav, Abrahams Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. a4 Bb4 6. e3 b5 7. Bd2 a5
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 c7c6 g1f3 d5c4 a2a4 f8b4 e2e3 b7b5 c1d2 a7a5
FEN: rnbqk1nr/5ppp/2p1p3/pp6/PbpP4/2N1PN2/1P1B1PPP/R2QKB1R w KQkq –

ECO: D31
Opening Name: Queen’s Gambit Declined: Semi-Slav, Junge Variation
SAN: 1. d4 d5 2. c4 e6 3. Nf3 c6 4. Nc3 dxc4 5. a4 Bb4 6. e3 b5 7. Bd2 Qb6
UCI: d2d4 d7d5 c2c4 e7e6 g1f3 c7c6 b1c3 d5c4 a2a4 f8b4 e2e3 b7b5 c1d2 d8b6
FEN: rnb1k1nr/p4ppp/1qp1p3/1p6/PbpP4/2N1PN2/1P1B1PPP/R2QKB1R w KQkq –

ECO: D31
Opening Name: Queen’s Gambit Declined: Semi-Slav, Koomen Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. e3 b5 6. a4 Bb4 7. Bd2 Qe7
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 c7c6 g1f3 d5c4 e2e3 b7b5 a2a4 f8b4 c1d2 d8e7
FEN: rnb1k1nr/p3qppp/2p1p3/1p6/PbpP4/2N1PN2/1P1B1PPP/R2QKB1R w KQkq –

ECO: D31
Opening Name: Queen’s Gambit Declined: Uhlmann Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. Bg5 h6 6. Bh4 O-O 7. Rc1 dxc4
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 f8e7 g1f3 g8f6 c1g5 h7h6 g5h4 e8g8 a1c1 d5c4
FEN: rnbq1rk1/ppp1bpp1/4pn1p/8/2pP3B/2N2N2/PP2PPPP/2RQKB1R w K –

ECO: D31
Opening Name: Semi-Slav Defense: Accelerated Move Order
SAN: 1. d4 d5 2. c4 e6 3. Nc3 c6
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 c7c6
FEN: rnbqkbnr/pp3ppp/2p1p3/3p4/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq –

ECO: D31
Opening Name: Semi-Slav Defense: Anti-Noteboom, Stonewall Variation, Portisch Gambit
SAN: 1. d4 d5 2. c4 e6 3. Nc3 c6 4. e3 f5 5. g4
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 c7c6 e2e3 f7f5 g2g4
FEN: rnbqkbnr/pp4pp/2p1p3/3p1p2/2PP2P1/2N1P3/PP3P1P/R1BQKBNR b KQkq –

ECO: D31
Opening Name: Semi-Slav Defense: Gunderam Gambit
SAN: 1. d4 d5 2. c4 e6 3. Nc3 c6 4. e4 dxe4 5. f3
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 c7c6 e2e4 d5e4 f2f3
FEN: rnbqkbnr/pp3ppp/2p1p3/8/2PPp3/2N2P2/PP4PP/R1BQKBNR b KQkq –

ECO: D31
Opening Name: Semi-Slav Defense: Marshall Gambit
SAN: 1. d4 d5 2. c4 e6 3. Nc3 c6 4. e4
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 c7c6 e2e4
FEN: rnbqkbnr/pp3ppp/2p1p3/3p4/2PPP3/2N5/PP3PPP/R1BQKBNR b KQkq –

ECO: D31
Opening Name: Semi-Slav Defense: Marshall Gambit, Forgotten Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 c6 4. e4 dxe4 5. Nxe4 Bb4+ 6. Nc3
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 c7c6 e2e4 d5e4 c3e4 f8b4 e4c3
FEN: rnbqk1nr/pp3ppp/2p1p3/8/1bPP4/2N5/PP3PPP/R1BQKBNR b KQkq –

ECO: D31
Opening Name: Semi-Slav Defense: Marshall Gambit, Main Line
SAN: 1. d4 d5 2. c4 e6 3. Nc3 c6 4. e4 dxe4 5. Nxe4 Bb4+ 6. Bd2
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 c7c6 e2e4 d5e4 c3e4 f8b4 c1d2
FEN: rnbqk1nr/pp3ppp/2p1p3/8/1bPPN3/8/PP1B1PPP/R2QKBNR b KQkq –

ECO: D31
Opening Name: Semi-Slav Defense: Marshall Gambit, Tolush Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 c6 4. e4 dxe4 5. Nxe4 Bb4+ 6. Bd2 Qxd4 7. Bxb4 Qxe4+ 8. Be2 c5 9. Bxc5 Qxg2
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 c7c6 e2e4 d5e4 c3e4 f8b4 c1d2 d8d4 d2b4 d4e4 f1e2 c6c5 b4c5 e4g2
FEN: rnb1k1nr/pp3ppp/4p3/2B5/2P5/8/PP2BPqP/R2QK1NR w KQkq –

ECO: D31
Opening Name: Semi-Slav Defense: Noteboom Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 c7c6 g1f3 d5c4
FEN: rnbqkbnr/pp3ppp/2p1p3/8/2pP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq –

ECO: D31
Opening Name: Semi-Slav Defense: Noteboom Variation, Abrahams Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. a4 Bb4 6. e3 Bxc3+ 7. bxc3 b5 8. axb5 cxb5
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 c7c6 g1f3 d5c4 a2a4 f8b4 e2e3 b4c3 b2c3 b7b5 a4b5 c6b5
FEN: rnbqk1nr/p4ppp/4p3/1p6/2pP4/2P1PN2/5PPP/R1BQKB1R w KQkq –

ECO: D31
Opening Name: Semi-Slav Defense: Noteboom Variation, Anti-Noteboom Gambit
SAN: 1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. g3
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 c7c6 g1f3 d5c4 g2g3
FEN: rnbqkbnr/pp3ppp/2p1p3/8/2pP4/2N2NP1/PP2PP1P/R1BQKB1R b KQkq –

ECO: D31
Opening Name: Semi-Slav Defense: Noteboom Variation, Anti-Noteboom Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. Bg5
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 c7c6 g1f3 d5c4 c1g5
FEN: rnbqkbnr/pp3ppp/2p1p3/6B1/2pP4/2N2N2/PP2PPPP/R2QKB1R b KQkq –

ECO: D31
Opening Name: Semi-Slav Defense: Noteboom Variation, Anti-Noteboom Variation, Belyavsky Line
SAN: 1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. Bg5 f6
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 c7c6 g1f3 d5c4 c1g5 f7f6
FEN: rnbqkbnr/pp4pp/2p1pp2/6B1/2pP4/2N2N2/PP2PPPP/R2QKB1R w KQkq –

ECO: D32
Opening Name: Queen’s Gambit Declined: Tarrasch Defense
SAN: 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5
FEN: rnbqkbnr/pp3ppp/8/2pp4/3P4/2N5/PP2PPPP/R1BQKBNR w KQkq –

ECO: D32
Opening Name: Tarrasch Defense
SAN: 1. d4 d5 2. c4 e6 3. Nc3 c5
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 c7c5
FEN: rnbqkbnr/pp3ppp/4p3/2pp4/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq –

ECO: D32
Opening Name: Tarrasch Defense: Grünfeld Gambit
SAN: 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. dxc5 d4 7. Na4 b5
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 d4c5 d5d4 c3a4 b7b5
FEN: r1bqkbnr/p4ppp/2n5/1pP5/N2p4/5N2/PP2PPPP/R1BQKB1R w KQkq b6

ECO: D32
Opening Name: Tarrasch Defense: Marshall Gambit
SAN: 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. e4
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 e2e4
FEN: rnbqkbnr/pp3ppp/8/2pp4/3PP3/2N5/PP3PPP/R1BQKBNR b KQkq –

ECO: D32
Opening Name: Tarrasch Defense: Schara Gambit
SAN: 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 cxd4
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 c5d4
FEN: rnbqkbnr/pp3ppp/4p3/3P4/3p4/2N5/PP2PPPP/R1BQKBNR w KQkq –

ECO: D32
Opening Name: Tarrasch Defense: Symmetrical Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 c5 4. e3 Nf6 5. Nf3 Nc6
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 e2e3 g8f6 g1f3 b8c6
FEN: r1bqkb1r/pp3ppp/2n1pn2/2pp4/2PP4/2N1PN2/PP3PPP/R1BQKB1R w KQkq –

ECO: D32
Opening Name: Tarrasch Defense: Tarrasch Gambit
SAN: 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. dxc5 d4 6. Na4 b5
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 d4c5 d5d4 c3a4 b7b5
FEN: rnbqkbnr/p4ppp/8/1pP5/N2p4/8/PP2PPPP/R1BQKBNR w KQkq b6

ECO: D32
Opening Name: Tarrasch Defense: Two Knights Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3
FEN: rnbqkbnr/pp3ppp/8/2pp4/3P4/2N2N2/PP2PPPP/R1BQKB1R b KQkq –

ECO: D32
Opening Name: Tarrasch Defense: von Hennig Gambit
SAN: 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 cxd4 5. Qxd4 Nc6 6. Qd1 exd5 7. Qxd5 Be6
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 c5d4 d1d4 b8c6 d4d1 e6d5 d1d5 c8e6
FEN: r2qkbnr/pp3ppp/2n1b3/3Q4/8/2N5/PP2PPPP/R1B1KBNR w KQkq –

ECO: D33
Opening Name: Tarrasch Defense: Dubov Tarrasch
SAN: 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 cxd4 8. Nxd4 Bc5
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3 g8f6 f1g2 c5d4 f3d4 f8c5
FEN: r1bqk2r/pp3ppp/2n2n2/2bp4/3N4/2N3P1/PP2PPBP/R1BQK2R w KQkq –

ECO: D33
Opening Name: Tarrasch Defense: Prague Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3 g8f6
FEN: r1bqkb1r/pp3ppp/2n2n2/2pp4/3P4/2N2NP1/PP2PP1P/R1BQKB1R w KQkq –

ECO: D33
Opening Name: Tarrasch Defense: Rubinstein System
SAN: 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3
FEN: r1bqkbnr/pp3ppp/2n5/2pp4/3P4/2N2NP1/PP2PP1P/R1BQKB1R b KQkq –

ECO: D33
Opening Name: Tarrasch Defense: Swedish Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 c4
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3 c5c4
FEN: r1bqkbnr/pp3ppp/2n5/3p4/2pP4/2N2NP1/PP2PP1P/R1BQKB1R w KQkq –

ECO: D33
Opening Name: Tarrasch Defense: Swedish Variation, Central Break
SAN: 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 c4 7. e4
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3 c5c4 e2e4
FEN: r1bqkbnr/pp3ppp/2n5/3p4/2pPP3/2N2NP1/PP3P1P/R1BQKB1R b KQkq –

ECO: D33
Opening Name: Tarrasch Defense: Wagner Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Bg4
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3 g8f6 f1g2 c8g4
FEN: r2qkb1r/pp3ppp/2n2n2/2pp4/3P2b1/2N2NP1/PP2PPBP/R1BQK2R w KQkq –

ECO: D34
Opening Name: Queen’s Gambit Declined: Tarrasch Defense, Stoltz Variation
SAN: 1. d4 d5 2. c4 e6 3. Nf3 c5 4. cxd5 exd5 5. g3 Nc6 6. Bg2 Nf6 7. O-O Be7 8. Nc3 O-O 9. Bg5 Be6 10. Rc1 b6
UCI: d2d4 d7d5 c2c4 e7e6 g1f3 c7c5 c4d5 e6d5 g2g3 b8c6 f1g2 g8f6 e1g1 f8e7 b1c3 e8g8 c1g5 c8e6 a1c1 b7b6
FEN: r2q1rk1/p3bppp/1pn1bn2/2pp2B1/3P4/2N2NP1/PP2PPBP/2RQ1RK1 w – –

ECO: D34
Opening Name: Tarrasch Defense: Classical Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3 g8f6 f1g2 f8e7 e1g1 e8g8
FEN: r1bq1rk1/pp2bppp/2n2n2/2pp4/3P4/2N2NP1/PP2PPBP/R1BQ1RK1 w – –

ECO: D34
Opening Name: Tarrasch Defense: Classical Variation, Advance Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. Bg5 c4
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3 g8f6 f1g2 f8e7 e1g1 e8g8 c1g5 c5c4
FEN: r1bq1rk1/pp2bppp/2n2n2/3p2B1/2pP4/2N2NP1/PP2PPBP/R2Q1RK1 w – –

ECO: D34
Opening Name: Tarrasch Defense: Classical Variation, Bogoljubow Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 c5 4. Nf3 d5 5. cxd5 exd5 6. g3 Nc6 7. Bg2 Be7 8. O-O O-O 9. Bg5 Be6 10. Rc1 c4
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 c7c5 g1f3 d7d5 c4d5 e6d5 g2g3 b8c6 f1g2 f8e7 e1g1 e8g8 c1g5 c8e6 a1c1 c5c4
FEN: r2q1rk1/pp2bppp/2n1bn2/3p2B1/2pP4/2N2NP1/PP2PPBP/2RQ1RK1 w – –

ECO: D34
Opening Name: Tarrasch Defense: Classical Variation, Carlsbad Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. Bg5
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3 g8f6 f1g2 f8e7 e1g1 e8g8 c1g5
FEN: r1bq1rk1/pp2bppp/2n2n2/2pp2B1/3P4/2N2NP1/PP2PPBP/R2Q1RK1 b – –

ECO: D34
Opening Name: Tarrasch Defense: Classical Variation, Chandler Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. Bg5 cxd4 10. Nxd4 h6 11. Be3 Re8 12. Rc1 Be6
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3 g8f6 f1g2 f8e7 e1g1 e8g8 c1g5 c5d4 f3d4 h7h6 g5e3 f8e8 a1c1 c8e6
FEN: r2qr1k1/pp2bpp1/2n1bn1p/3p4/3N4/2N1B1P1/PP2PPBP/2RQ1RK1 w – –

ECO: D34
Opening Name: Tarrasch Defense: Classical Variation, Classical Tarrasch Gambit
SAN: 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. dxc5 d4
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3 g8f6 f1g2 f8e7 e1g1 e8g8 d4c5 d5d4
FEN: r1bq1rk1/pp2bppp/2n2n2/2P5/3p4/2N2NP1/PP2PPBP/R1BQ1RK1 w – –

ECO: D34
Opening Name: Tarrasch Defense: Classical Variation, Endgame Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. Bg5 Be6
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3 g8f6 f1g2 f8e7 e1g1 e8g8 c1g5 c8e6
FEN: r2q1rk1/pp2bppp/2n1bn2/2pp2B1/3P4/2N2NP1/PP2PPBP/R2Q1RK1 w – –

ECO: D34
Opening Name: Tarrasch Defense: Classical Variation, Main Line
SAN: 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. Bg5 cxd4 10. Nxd4 h6 11. Be3 Re8
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3 g8f6 f1g2 f8e7 e1g1 e8g8 c1g5 c5d4 f3d4 h7h6 g5e3 f8e8
FEN: r1bqr1k1/pp2bpp1/2n2n1p/3p4/3N4/2N1B1P1/PP2PPBP/R2Q1RK1 w – –

ECO: D34
Opening Name: Tarrasch Defense: Classical Variation, Petursson Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. Bg5 cxd4 10. Nxd4 Re8
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3 g8f6 f1g2 f8e7 e1g1 e8g8 c1g5 c5d4 f3d4 f8e8
FEN: r1bqr1k1/pp2bppp/2n2n2/3p2B1/3N4/2N3P1/PP2PPBP/R2Q1RK1 w – –

ECO: D34
Opening Name: Tarrasch Defense: Classical Variation, Réti Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. dxc5 Bxc5 10. Na4
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3 g8f6 f1g2 f8e7 e1g1 e8g8 d4c5 e7c5 c3a4
FEN: r1bq1rk1/pp3ppp/2n2n2/2bp4/N7/5NP1/PP2PPBP/R1BQ1RK1 b – –

ECO: D34
Opening Name: Tarrasch Defense: Classical Variation, Spassky Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. Bg5 cxd4 10. Nxd4 h6 11. Be3 Bg4
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3 g8f6 f1g2 f8e7 e1g1 e8g8 c1g5 c5d4 f3d4 h7h6 g5e3 c8g4
FEN: r2q1rk1/pp2bpp1/2n2n1p/3p4/3N2b1/2N1B1P1/PP2PPBP/R2Q1RK1 w – –

ECO: D34
Opening Name: Tarrasch Defense: Prague Variation, Main Line
SAN: 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3 g8f6 f1g2 f8e7
FEN: r1bqk2r/pp2bppp/2n2n2/2pp4/3P4/2N2NP1/PP2PPBP/R1BQK2R w KQkq –

ECO: D35
Opening Name: Queen’s Gambit Declined: Exchange Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 d7d5 c4d5
FEN: rnbqkb1r/ppp2ppp/4pn2/3P4/3P4/2N5/PP2PPPP/R1BQKBNR b KQkq –

ECO: D35
Opening Name: Queen’s Gambit Declined: Exchange Variation, Chameleon Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 exd5 5. Bg5 Be7 6. e3 O-O 7. Bd3 Nbd7 8. Qc2 Re8 9. Nge2 Nf8 10. O-O-O
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 d7d5 c4d5 e6d5 c1g5 f8e7 e2e3 e8g8 f1d3 b8d7 d1c2 f8e8 g1e2 d7f8 e1c1
FEN: r1bqrnk1/ppp1bppp/5n2/3p2B1/3P4/2NBP3/PPQ1NPPP/2KR3R b – –

ECO: D35
Opening Name: Queen’s Gambit Declined: Exchange Variation, Positional Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 exd5 5. Bg5
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 d7d5 c4d5 e6d5 c1g5
FEN: rnbqkb1r/ppp2ppp/5n2/3p2B1/3P4/2N5/PP2PPPP/R2QKBNR b KQkq –

ECO: D35
Opening Name: Queen’s Gambit Declined: Exchange Variation, Positional Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 exd5 5. Bg5 c6
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 d7d5 c4d5 e6d5 c1g5 c7c6
FEN: rnbqkb1r/pp3ppp/2p2n2/3p2B1/3P4/2N5/PP2PPPP/R2QKBNR w KQkq –

ECO: D35
Opening Name: Queen’s Gambit Declined: Exchange Variation, Sämisch Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Nbd7 5. cxd5 exd5 6. Bf4
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 b8d7 c4d5 e6d5 c1f4
FEN: r1bqkb1r/pppn1ppp/5n2/3p4/3P1B2/2N2N2/PP2PPPP/R2QKB1R b KQkq –

ECO: D35
Opening Name: Queen’s Gambit Declined: Harrwitz Attack
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bf4
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1f4
FEN: rnbqkb1r/ppp2ppp/4pn2/3p4/2PP1B2/2N5/PP2PPPP/R2QKBNR b KQkq –

ECO: D35
Opening Name: Queen’s Gambit Declined: Normal Defense
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Nf6
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 g8f6
FEN: rnbqkb1r/ppp2ppp/4pn2/3p4/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq –

ECO: D36
Opening Name: Queen’s Gambit Declined: Exchange Variation, Reshevsky Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 exd5 5. Bg5 c6 6. Qc2
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 d7d5 c4d5 e6d5 c1g5 c7c6 d1c2
FEN: rnbqkb1r/pp3ppp/2p2n2/3p2B1/3P4/2N5/PPQ1PPPP/R3KBNR b KQkq –

ECO: D37
Opening Name: Queen’s Gambit Declined: Barmen Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Nbd7
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 b8d7
FEN: r1bqkb1r/pppn1ppp/4pn2/3p4/2PP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq –

ECO: D37
Opening Name: Queen’s Gambit Declined: Harrwitz Attack
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bf4
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1f4
FEN: rnbqk2r/ppp1bppp/4pn2/3p4/2PP1B2/2N2N2/PP2PPPP/R2QKB1R b KQkq –

ECO: D37
Opening Name: Queen’s Gambit Declined: Harrwitz Attack
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bf4 O-O 6. e3 c5 7. dxc5 Bxc5 8. Qc2 Nc6 9. Rd1 Qa5 10. a3
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1f4 e8g8 e2e3 c7c5 d4c5 e7c5 d1c2 b8c6 a1d1 d8a5 a2a3
FEN: r1b2rk1/pp3ppp/2n1pn2/q1bp4/2P2B2/P1N1PN2/1PQ2PPP/3RKB1R b K –

ECO: D37
Opening Name: Queen’s Gambit Declined: Harrwitz Attack
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bf4 O-O 6. e3 c5 7. dxc5 Bxc5 8. Qc2 Nc6 9. a3 Qa5 10. O-O-O
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1f4 e8g8 e2e3 c7c5 d4c5 e7c5 d1c2 b8c6 a2a3 d8a5 e1c1
FEN: r1b2rk1/pp3ppp/2n1pn2/q1bp4/2P2B2/P1N1PN2/1PQ2PPP/2KR1B1R b – –

ECO: D37
Opening Name: Queen’s Gambit Declined: Harrwitz Attack, Fianchetto Defense
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. Bf4 O-O 6. e3 b6
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 f8e7 g1f3 g8f6 c1f4 e8g8 e2e3 b7b6
FEN: rnbq1rk1/p1p1bppp/1p2pn2/3p4/2PP1B2/2N1PN2/PP3PPP/R2QKB1R w KQ –

ECO: D37
Opening Name: Queen’s Gambit Declined: Harrwitz Attack, Main Line
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bf4 O-O 6. e3 c5 7. dxc5 Bxc5
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1f4 e8g8 e2e3 c7c5 d4c5 e7c5
FEN: rnbq1rk1/pp3ppp/4pn2/2bp4/2P2B2/2N1PN2/PP3PPP/R2QKB1R w KQ –

ECO: D37
Opening Name: Queen’s Gambit Declined: Harrwitz Attack, Orthodox Defense
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Be7 5. Bf4 O-O 6. e3 c6
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 f8e7 c1f4 e8g8 e2e3 c7c6
FEN: rnbq1rk1/pp2bppp/2p1pn2/3p4/2PP1B2/2N1PN2/PP3PPP/R2QKB1R w KQ –

ECO: D37
Opening Name: Queen’s Gambit Declined: Harrwitz Attack, Two Knights Defense
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bf4 O-O 6. e3 Nbd7
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1f4 e8g8 e2e3 b8d7
FEN: r1bq1rk1/pppnbppp/4pn2/3p4/2PP1B2/2N1PN2/PP3PPP/R2QKB1R w KQ –

ECO: D37
Opening Name: Queen’s Gambit Declined: Harrwitz Attack, Two Knights Defense, Blockade Line
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Nf3 Be7 5. Bf4 O-O 6. e3 Nbd7 7. c5
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 d7d5 g1f3 f8e7 c1f4 e8g8 e2e3 b8d7 c4c5
FEN: r1bq1rk1/pppnbppp/4pn2/2Pp4/3P1B2/2N1PN2/PP3PPP/R2QKB1R b KQ –

ECO: D37
Opening Name: Queen’s Gambit Declined: Knight Defense, Alekhine Gambit
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Nbd7 5. Bg5 h6 6. Bh4 dxc4
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 b8d7 c1g5 h7h6 g5h4 d5c4
FEN: r1bqkb1r/pppn1pp1/4pn1p/8/2pP3B/2N2N2/PP2PPPP/R2QKB1R w KQkq –

ECO: D37
Opening Name: Queen’s Gambit Declined: Miles Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. Qc2
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1g5 e8g8 d1c2
FEN: rnbq1rk1/ppp1bppp/4pn2/3p2B1/2PP4/2N2N2/PPQ1PPPP/R3KB1R b KQ –

ECO: D37
Opening Name: Queen’s Gambit Declined: Three Knights Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3
FEN: rnbqkb1r/ppp2ppp/4pn2/3p4/2PP4/2N2N2/PP2PPPP/R1BQKB1R b KQkq –

ECO: D37
Opening Name: Queen’s Gambit Declined: Three Knights, Vienna Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 dxc4
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 d5c4
FEN: rnbqkb1r/ppp2ppp/4pn2/8/2pP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq –

ECO: D37
Opening Name: Queen’s Gambit Declined: Vienna Variation, Quiet Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 dxc4 5. e3
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 d5c4 e2e3
FEN: rnbqkb1r/ppp2ppp/4pn2/8/2pP4/2N1PN2/PP3PPP/R1BQKB1R b KQkq –

ECO: D38
Opening Name: Queen’s Gambit Declined: Ragozin Defense
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8b4
FEN: rnbqk2r/ppp2ppp/4pn2/3p4/1bPP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq –

ECO: D38
Opening Name: Queen’s Gambit Declined: Ragozin Defense, Alekhine Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. Qa4+
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8b4 d1a4
FEN: rnbqk2r/ppp2ppp/4pn2/3p4/QbPP4/2N2N2/PP2PPPP/R1B1KB1R b KQkq –

ECO: D38
Opening Name: Queen’s Gambit Declined: Westphalian Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. Bg5 Nbd7 6. e3 c5
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8b4 c1g5 b8d7 e2e3 c7c5
FEN: r1bqk2r/pp1n1ppp/4pn2/2pp2B1/1bPP4/2N1PN2/PP3PPP/R2QKB1R w KQkq –

ECO: D39
Opening Name: Queen’s Gambit Declined: Ragozin Defense, Vienna Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. Bg5 dxc4
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8b4 c1g5 d5c4
FEN: rnbqk2r/ppp2ppp/4pn2/6B1/1bpP4/2N2N2/PP2PPPP/R2QKB1R w KQkq –

ECO: D40
Opening Name: Queen’s Gambit Declined: Semi-Tarrasch Defense
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 c7c5
FEN: rnbqkb1r/pp3ppp/4pn2/2pp4/2PP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq –

ECO: D40
Opening Name: Queen’s Gambit Declined: Semi-Tarrasch Defense, Levenfish Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. e3 Nc6 6. Bd3 Bd6 7. O-O O-O 8. Qe2 Qe7 9. dxc5 Bxc5 10. e4
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c5 e2e3 b8c6 f1d3 f8d6 e1g1 e8g8 d1e2 d8e7 d4c5 d6c5 e3e4
FEN: r1b2rk1/pp2qppp/2n1pn2/2bp4/2P1P3/2NB1N2/PP2QPPP/R1B2RK1 b – –

ECO: D40
Opening Name: Queen’s Gambit Declined: Semi-Tarrasch Defense, Pillsbury Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. Bg5
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c5 c1g5
FEN: rnbqkb1r/pp3ppp/4pn2/2pp2B1/2PP4/2N2N2/PP2PPPP/R2QKB1R b KQkq –

ECO: D40
Opening Name: Queen’s Gambit Declined: Semi-Tarrasch Defense, Symmetrical Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. e3 Nc6 6. Bd3 Bd6 7. O-O O-O
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c5 e2e3 b8c6 f1d3 f8d6 e1g1 e8g8
FEN: r1bq1rk1/pp3ppp/2nbpn2/2pp4/2PP4/2NBPN2/PP3PPP/R1BQ1RK1 w – –

ECO: D41
Opening Name: Queen’s Gambit Declined: Semi-Tarrasch Defense
SAN: 1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. g3 d5 5. d4 e6
UCI: c2c4 c7c5 g1f3 g8f6 b1c3 b8c6 g2g3 d7d5 d2d4 e7e6
FEN: r1bqkb1r/pp3ppp/2n1pn2/2pp4/2PP4/2N2NP1/PP2PP1P/R1BQKB1R w KQkq –

ECO: D41
Opening Name: Queen’s Gambit Declined: Semi-Tarrasch Defense
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 c7c5 c4d5
FEN: rnbqkb1r/pp3ppp/4pn2/2pP4/3P4/2N2N2/PP2PPPP/R1BQKB1R b KQkq –

ECO: D41
Opening Name: Queen’s Gambit Declined: Semi-Tarrasch Defense, Exchange Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5 Nxd5 6. e4
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 c7c5 c4d5 f6d5 e2e4
FEN: rnbqkb1r/pp3ppp/4p3/2pn4/3PP3/2N2N2/PP3PPP/R1BQKB1R b KQkq –

ECO: D41
Opening Name: Queen’s Gambit Declined: Semi-Tarrasch Defense, Kmoch Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. cxd5 Nxd5 6. e4 Nxc3 7. bxc3 cxd4 8. cxd4 Bb4+ 9. Bd2 Bxd2+ 10. Qxd2 O-O 11. Bb5
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c5 c4d5 f6d5 e2e4 d5c3 b2c3 c5d4 c3d4 f8b4 c1d2 b4d2 d1d2 e8g8 f1b5
FEN: rnbq1rk1/pp3ppp/4p3/1B6/3PP3/5N2/P2Q1PPP/R3K2R b KQ –

ECO: D41
Opening Name: Queen’s Gambit Declined: Semi-Tarrasch Defense, Pillsbury Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5 Nxd5 6. e3
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 c7c5 c4d5 f6d5 e2e3
FEN: rnbqkb1r/pp3ppp/4p3/2pn4/3P4/2N1PN2/PP3PPP/R1BQKB1R b KQkq –

ECO: D41
Opening Name: Queen’s Gambit Declined: Semi-Tarrasch Defense, San Sebastian Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 c5 7. Nf3 cxd4 8. cxd4 Bb4+ 9. Bd2 Qa5
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c4d5 f6d5 e2e4 d5c3 b2c3 c7c5 g1f3 c5d4 c3d4 f8b4 c1d2 d8a5
FEN: rnb1k2r/pp3ppp/4p3/q7/1b1PP3/5N2/P2B1PPP/R2QKB1R w KQkq –

ECO: D42
Opening Name: Queen’s Gambit Declined: Semi-Tarrasch Defense, Main Line
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5 Nxd5 6. e3 Nc6 7. Bd3
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 c7c5 c4d5 f6d5 e2e3 b8c6 f1d3
FEN: r1bqkb1r/pp3ppp/2n1p3/2pn4/3P4/2NBPN2/PP3PPP/R1BQK2R b KQkq –

ECO: D43
Opening Name: Queen’s Gambit Declined: Hastings Variation
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 h6 6. Bxf6 Qxf6 7. Qb3
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 e7e6 c1g5 h7h6 g5f6 d8f6 d1b3
FEN: rnb1kb1r/pp3pp1/2p1pq1p/3p4/2PP4/1QN2N2/PP2PPPP/R3KB1R b KQkq –

ECO: D43
Opening Name: Semi-Slav Defense
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 e7e6
FEN: rnbqkb1r/pp3ppp/2p1pn2/3p4/2PP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq –

ECO: D43
Opening Name: Semi-Slav Defense: Anti-Moscow Gambit
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 h6 6. Bh4
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 e7e6 c1g5 h7h6 g5h4
FEN: rnbqkb1r/pp3pp1/2p1pn1p/3p4/2PP3B/2N2N2/PP2PPPP/R2QKB1R b KQkq –

ECO: D44
Opening Name: Semi-Slav Defense Accepted
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 dxc4
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 e7e6 c1g5 d5c4
FEN: rnbqkb1r/pp3ppp/2p1pn2/6B1/2pP4/2N2N2/PP2PPPP/R2QKB1R w KQkq –

ECO: D44
Opening Name: Semi-Slav Defense: Botvinnik Variation
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 dxc4 6. e4
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 e7e6 c1g5 d5c4 e2e4
FEN: rnbqkb1r/pp3ppp/2p1pn2/6B1/2pPP3/2N2N2/PP3PPP/R2QKB1R b KQkq –

ECO: D44
Opening Name: Semi-Slav Defense: Botvinnik Variation
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 dxc4 6. e4 b5 7. e5 h6 8. Bh4 g5 9. Nxg5
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 e7e6 c1g5 d5c4 e2e4 b7b5 e4e5 h7h6 g5h4 g7g5 f3g5
FEN: rnbqkb1r/p4p2/2p1pn1p/1p2P1N1/2pP3B/2N5/PP3PPP/R2QKB1R b KQkq –

ECO: D44
Opening Name: Semi-Slav Defense: Botvinnik Variation, Alatortsev System
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c6 5. Bg5 dxc4 6. e4 b5 7. e5 h6 8. Bh4 g5 9. Nxg5 Nd5
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 c7c6 c1g5 d5c4 e2e4 b7b5 e4e5 h7h6 g5h4 g7g5 f3g5 f6d5
FEN: rnbqkb1r/p4p2/2p1p2p/1p1nP1N1/2pP3B/2N5/PP3PPP/R2QKB1R w KQkq –

ECO: D44
Opening Name: Semi-Slav Defense: Botvinnik Variation, Ekstrom Variation
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 dxc4 6. e4 b5 7. e5 h6 8. Bh4 g5 9. exf6 gxh4 10. Ne5
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 e7e6 c1g5 d5c4 e2e4 b7b5 e4e5 h7h6 g5h4 g7g5 e5f6 g5h4 f3e5
FEN: rnbqkb1r/p4p2/2p1pP1p/1p2N3/2pP3p/2N5/PP3PPP/R2QKB1R b KQkq –

ECO: D44
Opening Name: Semi-Slav Defense: Botvinnik Variation, Lilienthal Variation
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 dxc4 6. e4 b5 7. e5 h6 8. Bh4 g5 9. Nxg5 hxg5 10. Bxg5 Nbd7 11. g3
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 e7e6 c1g5 d5c4 e2e4 b7b5 e4e5 h7h6 g5h4 g7g5 f3g5 h6g5 h4g5 b8d7 g2g3
FEN: r1bqkb1r/p2n1p2/2p1pn2/1p2P1B1/2pP4/2N3P1/PP3P1P/R2QKB1R b KQkq –

ECO: D44
Opening Name: Semi-Slav Defense: Botvinnik Variation, Szabo Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c6 5. Bg5 dxc4 6. e4 b5 7. e5 h6 8. Bh4 g5 9. Nxg5 hxg5 10. Bxg5 Nbd7 11. Qf3
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 c7c6 c1g5 d5c4 e2e4 b7b5 e4e5 h7h6 g5h4 g7g5 f3g5 h6g5 h4g5 b8d7 d1f3
FEN: r1bqkb1r/p2n1p2/2p1pn2/1p2P1B1/2pP4/2N2Q2/PP3PPP/R3KB1R b KQkq –

ECO: D45
Opening Name: Semi-Slav Defense: Accelerated Meran Variation
SAN: 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 a6
UCI: d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 e7e6 g1f3 a7a6
FEN: rnbqkb1r/1p3ppp/p1p1pn2/3p4/2PP4/2N1PN2/PP3PPP/R1BQKB1R w KQkq –

ECO: D45
Opening Name: Semi-Slav Defense: Main Line
SAN: 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3
UCI: d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 e7e6 g1f3
FEN: rnbqkb1r/pp3ppp/2p1pn2/3p4/2PP4/2N1PN2/PP3PPP/R1BQKB1R b KQkq –

ECO: D45
Opening Name: Semi-Slav Defense: Normal Variation
SAN: 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7
UCI: d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 e7e6 g1f3 b8d7
FEN: r1bqkb1r/pp1n1ppp/2p1pn2/3p4/2PP4/2N1PN2/PP3PPP/R1BQKB1R w KQkq –

ECO: D45
Opening Name: Semi-Slav Defense: Rubinstein System
SAN: 1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 Nf6 5. e3 Nbd7 6. Ne5
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 c7c6 g1f3 g8f6 e2e3 b8d7 f3e5
FEN: r1bqkb1r/pp1n1ppp/2p1pn2/3pN3/2PP4/2N1P3/PP3PPP/R1BQKB1R b KQkq –

ECO: D45
Opening Name: Semi-Slav Defense: Stoltz Variation
SAN: 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Qc2
UCI: d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 e7e6 g1f3 b8d7 d1c2
FEN: r1bqkb1r/pp1n1ppp/2p1pn2/3p4/2PP4/2N1PN2/PPQ2PPP/R1B1KB1R b KQkq –

ECO: D45
Opening Name: Semi-Slav Defense: Stoltz Variation
SAN: 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Qc2 b6 7. b3
UCI: d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 e7e6 g1f3 b8d7 d1c2 b7b6 b2b3
FEN: r1bqkb1r/p2n1ppp/1pp1pn2/3p4/2PP4/1PN1PN2/P1Q2PPP/R1B1KB1R b KQkq –

ECO: D45
Opening Name: Semi-Slav Defense: Stoltz Variation
SAN: 1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. e3 e6 5. Nc3 Nbd7 6. Qc2 Bd6 7. b3
UCI: d2d4 d7d5 g1f3 g8f6 c2c4 c7c6 e2e3 e7e6 b1c3 b8d7 d1c2 f8d6 b2b3
FEN: r1bqk2r/pp1n1ppp/2pbpn2/3p4/2PP4/1PN1PN2/P1Q2PPP/R1B1KB1R b KQkq –

ECO: D45
Opening Name: Semi-Slav Defense: Stoltz Variation
SAN: 1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. e3 e6 5. Nc3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Bb2
UCI: d2d4 d7d5 g1f3 g8f6 c2c4 c7c6 e2e3 e7e6 b1c3 b8d7 d1c2 f8d6 b2b3 e8g8 c1b2
FEN: r1bq1rk1/pp1n1ppp/2pbpn2/3p4/2PP4/1PN1PN2/PBQ2PPP/R3KB1R b KQ –

ECO: D45
Opening Name: Semi-Slav Defense: Stoltz Variation, Center Variation
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Qc2 Bd6 7. e4
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 e7e6 e2e3 b8d7 d1c2 f8d6 e3e4
FEN: r1bqk2r/pp1n1ppp/2pbpn2/3p4/2PPP3/2N2N2/PPQ2PPP/R1B1KB1R b KQkq –

ECO: D45
Opening Name: Semi-Slav Defense: Stoltz Variation, Center Variation, Mikhalchishin Line
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Qc2 Bd6 7. e4 dxe4 8. Nxe4 Nxe4 9. Qxe4 e5 10. dxe5
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 e7e6 e2e3 b8d7 d1c2 f8d6 e3e4 d5e4 c3e4 f6e4 c2e4 e6e5 d4e5
FEN: r1bqk2r/pp1n1ppp/2pb4/4P3/2P1Q3/5N2/PP3PPP/R1B1KB1R b KQkq –

ECO: D45
Opening Name: Semi-Slav Defense: Stoltz Variation, Shabalov Attack
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Qc2 Bd6 7. g4
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 e7e6 e2e3 b8d7 d1c2 f8d6 g2g4
FEN: r1bqk2r/pp1n1ppp/2pbpn2/3p4/2PP2P1/2N1PN2/PPQ2P1P/R1B1KB1R b KQkq –

ECO: D45
Opening Name: Semi-Slav Defense: Stonewall Defense
SAN: 1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. Nc3 e6 5. e3 Ne4 6. Bd3 f5
UCI: d2d4 d7d5 g1f3 g8f6 c2c4 c7c6 b1c3 e7e6 e2e3 f6e4 f1d3 f7f5
FEN: rnbqkb1r/pp4pp/2p1p3/3p1p2/2PPn3/2NBPN2/PP3PPP/R1BQK2R w KQkq –

ECO: D46
Opening Name: Semi-Slav Defense: Bogoljubow Variation
SAN: 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 Be7
UCI: d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 e7e6 g1f3 b8d7 f1d3 f8e7
FEN: r1bqk2r/pp1nbppp/2p1pn2/3p4/2PP4/2NBPN2/PP3PPP/R1BQK2R w KQkq –

ECO: D46
Opening Name: Semi-Slav Defense: Chigorin Defense
SAN: 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 Bd6
UCI: d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 e7e6 g1f3 b8d7 f1d3 f8d6
FEN: r1bqk2r/pp1n1ppp/2pbpn2/3p4/2PP4/2NBPN2/PP3PPP/R1BQK2R w KQkq –

ECO: D46
Opening Name: Semi-Slav Defense: Chigorin Defense
SAN: 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 Bd6 7. Qc2
UCI: d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 e7e6 g1f3 b8d7 f1d3 f8d6 d1c2
FEN: r1bqk2r/pp1n1ppp/2pbpn2/3p4/2PP4/2NBPN2/PPQ2PPP/R1B1K2R b KQkq –

ECO: D46
Opening Name: Semi-Slav Defense: Chigorin Defense
SAN: 1. d4 d5 2. c4 c6 3. Nf3 e6 4. e3 Nf6 5. Nc3 Bd6 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 Nbd7 9. O-O O-O 10. Qc2
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 e7e6 e2e3 g8f6 b1c3 f8d6 f1d3 d5c4 d3c4 b7b5 c4d3 b8d7 e1g1 e8g8 d1c2
FEN: r1bq1rk1/p2n1ppp/2pbpn2/1p6/3P4/2NBPN2/PPQ2PPP/R1B2RK1 b – –

ECO: D46
Opening Name: Semi-Slav Defense: Chigorin Defense
SAN: 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 Bd6 9. O-O Bb7 10. a3 O-O 11. Qc2
UCI: d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 e7e6 g1f3 b8d7 f1d3 d5c4 d3c4 b7b5 c4d3 f8d6 e1g1 c8b7 a2a3 e8g8 d1c2
FEN: r2q1rk1/pb1n1ppp/2pbpn2/1p6/3P4/P1NBPN2/1PQ2PPP/R1B2RK1 b – –

ECO: D46
Opening Name: Semi-Slav Defense: Main Line
SAN: 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3
UCI: d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 e7e6 g1f3 b8d7 f1d3
FEN: r1bqkb1r/pp1n1ppp/2p1pn2/3p4/2PP4/2NBPN2/PP3PPP/R1BQK2R b KQkq –

ECO: D46
Opening Name: Semi-Slav Defense: Main Line
SAN: 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Qc2 b6 7. b3 Bb7 8. Bd3 Be7 9. O-O O-O 10. Bb2
UCI: d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 e7e6 g1f3 b8d7 d1c2 b7b6 b2b3 c8b7 f1d3 f8e7 e1g1 e8g8 c1b2
FEN: r2q1rk1/pb1nbppp/1pp1pn2/3p4/2PP4/1PNBPN2/PBQ2PPP/R4RK1 b – –

ECO: D46
Opening Name: Semi-Slav Defense: Romih Variation
SAN: 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 Bb4
UCI: d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 e7e6 g1f3 b8d7 f1d3 f8b4
FEN: r1bqk2r/pp1n1ppp/2p1pn2/3p4/1bPP4/2NBPN2/PP3PPP/R1BQK2R w KQkq –

ECO: D47
Opening Name: Semi-Slav Defense: Meran Variation
SAN: 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5
UCI: d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 e7e6 g1f3 b8d7 f1d3 d5c4 d3c4 b7b5
FEN: r1bqkb1r/p2n1ppp/2p1pn2/1p6/2BP4/2N1PN2/PP3PPP/R1BQK2R w KQkq –

ECO: D47
Opening Name: Semi-Slav Defense: Meran Variation, Lundin Variation
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 b4
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 e7e6 e2e3 b8d7 f1d3 d5c4 d3c4 b7b5 c4d3 b5b4
FEN: r1bqkb1r/p2n1ppp/2p1pn2/8/1p1P4/2NBPN2/PP3PPP/R1BQK2R w KQkq –

ECO: D47
Opening Name: Semi-Slav Defense: Meran Variation, Wade Variation
SAN: 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 Bb7
UCI: d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 e7e6 g1f3 b8d7 f1d3 d5c4 d3c4 b7b5 c4d3 c8b7
FEN: r2qkb1r/pb1n1ppp/2p1pn2/1p6/3P4/2NBPN2/PP3PPP/R1BQK2R w KQkq –

ECO: D47
Opening Name: Semi-Slav Defense: Meran Variation, Wade Variation, Kaidanov Gambit
SAN: 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 Bb7 9. e4 b4 10. Na4 c5 11. e5 Nd5 12. O-O cxd4 13. Nxd4
UCI: d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 e7e6 g1f3 b8d7 f1d3 d5c4 d3c4 b7b5 c4d3 c8b7 e3e4 b5b4 c3a4 c6c5 e4e5 f6d5 e1g1 c5d4 f3d4
FEN: r2qkb1r/pb1n1ppp/4p3/3nP3/Np1N4/3B4/PP3PPP/R1BQ1RK1 b kq –

ECO: D47
Opening Name: Semi-Slav Defense: Meran Variation, Wade Variation, Larsen Variation
SAN: 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 Bb7 9. e4 b4 10. Na4 c5 11. e5 Nd5
UCI: d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 e7e6 g1f3 b8d7 f1d3 d5c4 d3c4 b7b5 c4d3 c8b7 e3e4 b5b4 c3a4 c6c5 e4e5 f6d5
FEN: r2qkb1r/pb1n1ppp/4p3/2pnP3/Np1P4/3B1N2/PP3PPP/R1BQK2R w KQkq –

ECO: D47
Opening Name: Semi-Slav Defense: Semi-Meran Variation
SAN: 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4
UCI: d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 e7e6 g1f3 b8d7 f1d3 d5c4 d3c4
FEN: r1bqkb1r/pp1n1ppp/2p1pn2/8/2BP4/2N1PN2/PP3PPP/R1BQK2R b KQkq –

ECO: D48
Opening Name: Semi-Slav Defense: Meran Variation
SAN: 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6
UCI: d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 e7e6 g1f3 b8d7 f1d3 d5c4 d3c4 b7b5 c4d3 a7a6
FEN: r1bqkb1r/3n1ppp/p1p1pn2/1p6/3P4/2NBPN2/PP3PPP/R1BQK2R w KQkq –

ECO: D48
Opening Name: Semi-Slav Defense: Meran Variation
SAN: 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 c5
UCI: d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 e7e6 g1f3 b8d7 f1d3 d5c4 d3c4 b7b5 c4d3 a7a6 e3e4 c6c5
FEN: r1bqkb1r/3n1ppp/p3pn2/1pp5/3PP3/2NB1N2/PP3PPP/R1BQK2R w KQkq –

ECO: D48
Opening Name: Semi-Slav Defense: Meran Variation, Old Variation
SAN: 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 c5 10. e5
UCI: d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 e7e6 g1f3 b8d7 f1d3 d5c4 d3c4 b7b5 c4d3 a7a6 e3e4 c6c5 e4e5
FEN: r1bqkb1r/3n1ppp/p3pn2/1pp1P3/3P4/2NB1N2/PP3PPP/R1BQK2R b KQkq –

ECO: D48
Opening Name: Semi-Slav Defense: Meran Variation, Pirc Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 c6 4. e3 Nf6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 b4
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 c7c6 e2e3 g8f6 g1f3 b8d7 f1d3 d5c4 d3c4 b7b5 c4d3 a7a6 e3e4 b5b4
FEN: r1bqkb1r/3n1ppp/p1p1pn2/8/1p1PP3/2NB1N2/PP3PPP/R1BQK2R w KQkq –

ECO: D48
Opening Name: Semi-Slav Defense: Meran Variation, Reynolds’ Variation
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 c5 10. d5
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 e7e6 e2e3 b8d7 f1d3 d5c4 d3c4 b7b5 c4d3 a7a6 e3e4 c6c5 d4d5
FEN: r1bqkb1r/3n1ppp/p3pn2/1ppP4/4P3/2NB1N2/PP3PPP/R1BQK2R b KQkq –

ECO: D49
Opening Name: Semi-Slav Defense: Meran Variation, Blumenfeld Variation
SAN: 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 c5 10. e5 cxd4 11. Nxb5
UCI: d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 e7e6 g1f3 b8d7 f1d3 d5c4 d3c4 b7b5 c4d3 a7a6 e3e4 c6c5 e4e5 c5d4 c3b5
FEN: r1bqkb1r/3n1ppp/p3pn2/1N2P3/3p4/3B1N2/PP3PPP/R1BQK2R b KQkq –

ECO: D49
Opening Name: Semi-Slav Defense: Meran Variation, Rabinovich Variation
SAN: 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 c5 10. e5 cxd4 11. Nxb5 Ng4
UCI: d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 e7e6 g1f3 b8d7 f1d3 d5c4 d3c4 b7b5 c4d3 a7a6 e3e4 c6c5 e4e5 c5d4 c3b5 f6g4
FEN: r1bqkb1r/3n1ppp/p3p3/1N2P3/3p2n1/3B1N2/PP3PPP/R1BQK2R w KQkq –

ECO: D49
Opening Name: Semi-Slav Defense: Meran Variation, Rellstab Attack
SAN: 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Nf3 e6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 c5 10. e5 cxd4 11. Nxb5 Nxe5 12. Nxe5 axb5 13. O-O Qd5 14. Qe2 Ba6 15. Bg5
UCI: d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 g1f3 e7e6 e2e3 b8d7 f1d3 d5c4 d3c4 b7b5 c4d3 a7a6 e3e4 c6c5 e4e5 c5d4 c3b5 d7e5 f3e5 a6b5 e1g1 d8d5 d1e2 c8a6 c1g5
FEN: r3kb1r/5ppp/b3pn2/1p1qN1B1/3p4/3B4/PP2QPPP/R4RK1 b kq –

ECO: D49
Opening Name: Semi-Slav Defense: Meran Variation, Sozin Variation
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 c5 10. e5 cxd4 11. Nxb5 Nxe5
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 e7e6 e2e3 b8d7 f1d3 d5c4 d3c4 b7b5 c4d3 a7a6 e3e4 c6c5 e4e5 c5d4 c3b5 d7e5
FEN: r1bqkb1r/5ppp/p3pn2/1N2n3/3p4/3B1N2/PP3PPP/R1BQK2R w KQkq –

ECO: D49
Opening Name: Semi-Slav Defense: Meran Variation, Sozin Variation
SAN: 1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. Nc3 e6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 c5 10. e5 cxd4 11. Nxb5 Nxe5 12. Nxe5 axb5 13. O-O
UCI: d2d4 d7d5 g1f3 g8f6 c2c4 c7c6 b1c3 e7e6 e2e3 b8d7 f1d3 d5c4 d3c4 b7b5 c4d3 a7a6 e3e4 c6c5 e4e5 c5d4 c3b5 d7e5 f3e5 a6b5 e1g1
FEN: r1bqkb1r/5ppp/4pn2/1p2N3/3p4/3B4/PP3PPP/R1BQ1RK1 b kq –

ECO: D49
Opening Name: Semi-Slav Defense: Meran Variation, Stahlberg Variation
SAN: 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 c5 10. e5 cxd4 11. Nxb5 Nxe5 12. Nxe5 axb5 13. Qf3
UCI: d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 e7e6 g1f3 b8d7 f1d3 d5c4 d3c4 b7b5 c4d3 a7a6 e3e4 c6c5 e4e5 c5d4 c3b5 d7e5 f3e5 a6b5 d1f3
FEN: r1bqkb1r/5ppp/4pn2/1p2N3/3p4/3B1Q2/PP3PPP/R1B1K2R b KQkq –

ECO: D50
Opening Name: Queen’s Gambit Declined: Been-Koomen Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 c7c5
FEN: rnbqkb1r/pp3ppp/4pn2/2pp2B1/2PP4/2N5/PP2PPPP/R2QKBNR w KQkq –

ECO: D50
Opening Name: Queen’s Gambit Declined: Modern Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5
FEN: rnbqkb1r/ppp2ppp/4pn2/3p2B1/2PP4/2N5/PP2PPPP/R2QKBNR b KQkq –

ECO: D50
Opening Name: Queen’s Gambit Declined: Pseudo-Tarrasch Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5 5. cxd5
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 c7c5 c4d5
FEN: rnbqkb1r/pp3ppp/4pn2/2pP2B1/3P4/2N5/PP2PPPP/R2QKBNR b KQkq –

ECO: D50
Opening Name: Queen’s Gambit Declined: Pseudo-Tarrasch Variation, Canal Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5 5. cxd5 Qb6
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 c7c5 c4d5 d8b6
FEN: rnb1kb1r/pp3ppp/1q2pn2/2pP2B1/3P4/2N5/PP2PPPP/R2QKBNR w KQkq –

ECO: D50
Opening Name: Queen’s Gambit Declined: Pseudo-Tarrasch Variation, Primitive Pillsbury Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5 5. Nf3 cxd4 6. Qxd4
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 c7c5 g1f3 c5d4 d1d4
FEN: rnbqkb1r/pp3ppp/4pn2/3p2B1/2PQ4/2N2N2/PP2PPPP/R3KB1R b KQkq –

ECO: D50
Opening Name: Queen’s Gambit Declined: Semi-Tarrasch Defense, Krause Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5 5. Nf3 cxd4 6. Nxd4 e5 7. Ndb5 a6 8. Qa4
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 c7c5 g1f3 c5d4 f3d4 e6e5 d4b5 a7a6 d1a4
FEN: rnbqkb1r/1p3ppp/p4n2/1N1pp1B1/Q1P5/2N5/PP2PPPP/R3KB1R b KQkq –

ECO: D51
Opening Name: Queen’s Gambit Declined: Alekhine Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. Nf3 c6 6. e4
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 b8d7 g1f3 c7c6 e2e4
FEN: r1bqkb1r/pp1n1ppp/2p1pn2/3p2B1/2PPP3/2N2N2/PP3PPP/R2QKB1R b KQkq –

ECO: D51
Opening Name: Queen’s Gambit Declined: Capablanca Variation, Anti-Cambridge Springs Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 c6 6. a3
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 b8d7 e2e3 c7c6 a2a3
FEN: r1bqkb1r/pp1n1ppp/2p1pn2/3p2B1/2PP4/P1N1P3/1P3PPP/R2QKBNR b KQkq –

ECO: D51
Opening Name: Queen’s Gambit Declined: Manhattan Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 Bb4
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 b8d7 e2e3 f8b4
FEN: r1bqk2r/pppn1ppp/4pn2/3p2B1/1bPP4/2N1P3/PP3PPP/R2QKBNR w KQkq –

ECO: D51
Opening Name: Queen’s Gambit Declined: Modern Variation, Knight Defense
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 b8d7
FEN: r1bqkb1r/pppn1ppp/4pn2/3p2B1/2PP4/2N5/PP2PPPP/R2QKBNR w KQkq –

ECO: D51
Opening Name: Queen’s Gambit Declined: Modern Variation, Knight Defense
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 b8d7 e2e3
FEN: r1bqkb1r/pppn1ppp/4pn2/3p2B1/2PP4/2N1P3/PP3PPP/R2QKBNR b KQkq –

ECO: D51
Opening Name: Queen’s Gambit Declined: Modern Variation, Knight Defense
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 c6
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 b8d7 e2e3 c7c6
FEN: r1bqkb1r/pp1n1ppp/2p1pn2/3p2B1/2PP4/2N1P3/PP3PPP/R2QKBNR w KQkq –

ECO: D51
Opening Name: Queen’s Gambit Declined: Rochlin Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. Nf3 c6 6. Rc1 Qa5 7. Bd2
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 b8d7 g1f3 c7c6 a1c1 d8a5 g5d2
FEN: r1b1kb1r/pp1n1ppp/2p1pn2/q2p4/2PP4/2N2N2/PP1BPPPP/2RQKB1R b Kkq –

ECO: D52
Opening Name: Queen’s Gambit Declined
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 Nbd7 6. e3
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 e7e6 c1g5 b8d7 e2e3
FEN: r1bqkb1r/pp1n1ppp/2p1pn2/3p2B1/2PP4/2N1PN2/PP3PPP/R2QKB1R b KQkq –

ECO: D52
Opening Name: Queen’s Gambit Declined: Cambridge Springs Defense
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 Nbd7 6. e3 Qa5
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 e7e6 c1g5 b8d7 e2e3 d8a5
FEN: r1b1kb1r/pp1n1ppp/2p1pn2/q2p2B1/2PP4/2N1PN2/PP3PPP/R2QKB1R w KQkq –

ECO: D52
Opening Name: Queen’s Gambit Declined: Cambridge Springs Defense
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 Nbd7 6. e3 Qa5 7. cxd5
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 e7e6 c1g5 b8d7 e2e3 d8a5 c4d5
FEN: r1b1kb1r/pp1n1ppp/2p1pn2/q2P2B1/3P4/2N1PN2/PP3PPP/R2QKB1R b KQkq –

ECO: D52
Opening Name: Queen’s Gambit Declined: Cambridge Springs Defense, Argentine Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 c6 6. Nf3 Qa5 7. Nd2 Bb4 8. Qc2 O-O 9. Bh4
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 b8d7 e2e3 c7c6 g1f3 d8a5 f3d2 f8b4 d1c2 e8g8 g5h4
FEN: r1b2rk1/pp1n1ppp/2p1pn2/q2p4/1bPP3B/2N1P3/PPQN1PPP/R3KB1R b KQ –

ECO: D52
Opening Name: Queen’s Gambit Declined: Cambridge Springs Defense, Bogoljubow Variation
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 Nbd7 6. e3 Qa5 7. Nd2 Bb4 8. Qc2
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 e7e6 c1g5 b8d7 e2e3 d8a5 f3d2 f8b4 d1c2
FEN: r1b1k2r/pp1n1ppp/2p1pn2/q2p2B1/1bPP4/2N1P3/PPQN1PPP/R3KB1R b KQkq –

ECO: D52
Opening Name: Queen’s Gambit Declined: Cambridge Springs Defense, Capablanca Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 c6 6. Nf3 Qa5 7. Bxf6
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 b8d7 e2e3 c7c6 g1f3 d8a5 g5f6
FEN: r1b1kb1r/pp1n1ppp/2p1pB2/q2p4/2PP4/2N1PN2/PP3PPP/R2QKB1R b KQkq –

ECO: D52
Opening Name: Queen’s Gambit Declined: Cambridge Springs Defense, Rubinstein Variation
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 Nbd7 6. e3 Qa5 7. Nd2 dxc4
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 e7e6 c1g5 b8d7 e2e3 d8a5 f3d2 d5c4
FEN: r1b1kb1r/pp1n1ppp/2p1pn2/q5B1/2pP4/2N1P3/PP1N1PPP/R2QKB1R w KQkq –

ECO: D52
Opening Name: Queen’s Gambit Declined: Cambridge Springs Defense, Yugoslav Variation
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 Nbd7 6. e3 Qa5 7. cxd5 Nxd5
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 e7e6 c1g5 b8d7 e2e3 d8a5 c4d5 f6d5
FEN: r1b1kb1r/pp1n1ppp/2p1p3/q2n2B1/3P4/2N1PN2/PP3PPP/R2QKB1R w KQkq –

ECO: D53
Opening Name: Queen’s Gambit Declined
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7
FEN: rnbqk2r/ppp1bppp/4pn2/3p2B1/2PP4/2N5/PP2PPPP/R2QKBNR w KQkq –

ECO: D53
Opening Name: Queen’s Gambit Declined: Lasker Defense
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Bg5 Be7 5. e3 Ne4
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 d7d5 c1g5 f8e7 e2e3 f6e4
FEN: rnbqk2r/ppp1bppp/4p3/3p2B1/2PPn3/2N1P3/PP3PPP/R2QKBNR w KQkq –

ECO: D53
Opening Name: Queen’s Gambit Declined: Modern Variation, Heral Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. Bxf6
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 g5f6
FEN: rnbqk2r/ppp1bppp/4pB2/3p4/2PP4/2N5/PP2PPPP/R2QKBNR b KQkq –

ECO: D54
Opening Name: Queen’s Gambit Declined: Neo-Orthodox Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Bg5 Be7 5. e3 O-O 6. Rc1
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 d7d5 c1g5 f8e7 e2e3 e8g8 a1c1
FEN: rnbq1rk1/ppp1bppp/4pn2/3p2B1/2PP4/2N1P3/PP3PPP/2RQKBNR b K –

ECO: D55
Opening Name: Queen’s Gambit Declined: Anti-Tartakower Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 h6 7. Bxf6
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1g5 e8g8 e2e3 h7h6 g5f6
FEN: rnbq1rk1/ppp1bpp1/4pB1p/3p4/2PP4/2N1PN2/PP3PPP/R2QKB1R b KQ –

ECO: D55
Opening Name: Queen’s Gambit Declined: Anti-Tartakower Variation, Petrosian Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 h6 6. Bxf6 Bxf6 7. e3 O-O 8. Rc1 c6 9. Bd3 Nd7 10. O-O dxc4 11. Bxc4
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1g5 h7h6 g5f6 e7f6 e2e3 e8g8 a1c1 c7c6 f1d3 b8d7 e1g1 d5c4 d3c4
FEN: r1bq1rk1/pp1n1pp1/2p1pb1p/8/2BP4/2N1PN2/PP3PPP/2RQ1RK1 b – –

ECO: D55
Opening Name: Queen’s Gambit Declined: Modern Variation, Normal Line
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1g5 e8g8 e2e3
FEN: rnbq1rk1/ppp1bppp/4pn2/3p2B1/2PP4/2N1PN2/PP3PPP/R2QKB1R b KQ –

ECO: D55
Opening Name: Queen’s Gambit Declined: Neo-Orthodox Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 h6
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1g5 e8g8 e2e3 h7h6
FEN: rnbq1rk1/ppp1bpp1/4pn1p/3p2B1/2PP4/2N1PN2/PP3PPP/R2QKB1R w KQ –

ECO: D55
Opening Name: Queen’s Gambit Declined: Neo-Orthodox Variation, Main Line
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 h6 6. Bh4 O-O 7. e3
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1g5 h7h6 g5h4 e8g8 e2e3
FEN: rnbq1rk1/ppp1bpp1/4pn1p/3p4/2PP3B/2N1PN2/PP3PPP/R2QKB1R b KQ –

ECO: D55
Opening Name: Queen’s Gambit Declined: Pillsbury Attack
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Nc3 d5 5. cxd5 exd5 6. Bg5 Be7 7. e3 O-O 8. Bd3 Bb7 9. Ne5
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 b1c3 d7d5 c4d5 e6d5 c1g5 f8e7 e2e3 e8g8 f1d3 c8b7 f3e5
FEN: rn1q1rk1/pbp1bppp/1p3n2/3pN1B1/3P4/2NBP3/PP3PPP/R2QK2R b KQ –

ECO: D56
Opening Name: Queen’s Gambit Declined: Lasker Defense
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. Bg5 h6 6. Bh4 O-O 7. e3 Ne4
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 f8e7 g1f3 g8f6 c1g5 h7h6 g5h4 e8g8 e2e3 f6e4
FEN: rnbq1rk1/ppp1bpp1/4p2p/3p4/2PPn2B/2N1PN2/PP3PPP/R2QKB1R w KQ –

ECO: D56
Opening Name: Queen’s Gambit Declined: Lasker Defense, Russian Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 h6 7. Bh4 Ne4 8. Bxe7 Qxe7 9. Qc2 Nf6 10. Bd3 dxc4 11. Bxc4 c5 12. O-O Nc6 13. Rfd1 Bd7
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 h7h6 g5h4 f6e4 h4e7 d8e7 d1c2 e4f6 f1d3 d5c4 d3c4 c7c5 e1g1 b8c6 f1d1 c8d7
FEN: r4rk1/pp1bqpp1/2n1pn1p/2p5/2BP4/2N1PN2/PPQ2PPP/R2R2K1 w – –

ECO: D56
Opening Name: Queen’s Gambit Declined: Lasker Defense, Teichmann Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 h6 6. Bh4 O-O 7. e3 Ne4 8. Bxe7 Qxe7 9. Qc2
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1g5 h7h6 g5h4 e8g8 e2e3 f6e4 h4e7 d8e7 d1c2
FEN: rnb2rk1/ppp1qpp1/4p2p/3p4/2PPn3/2N1PN2/PPQ2PPP/R3KB1R b KQ –

ECO: D57
Opening Name: Queen’s Gambit Declined: Lasker Defense, Bernstein Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Bg5 Be7 5. e3 h6 6. Bh4 O-O 7. Nf3 Ne4 8. Bxe7 Qxe7 9. cxd5 Nxc3 10. bxc3 exd5 11. Qb3 Qd6
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 d7d5 c1g5 f8e7 e2e3 h7h6 g5h4 e8g8 g1f3 f6e4 h4e7 d8e7 c4d5 e4c3 b2c3 e6d5 d1b3 e7d6
FEN: rnb2rk1/ppp2pp1/3q3p/3p4/3P4/1QP1PN2/P4PPP/R3KB1R w KQ –

ECO: D57
Opening Name: Queen’s Gambit Declined: Lasker Defense, Bernstein Variation, Mar del Plata Gambit
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 h6 7. Bh4 Ne4 8. Bxe7 Qxe7 9. cxd5 Nxc3 10. bxc3 exd5 11. Qb3 Rd8 12. c4 Be6
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 h7h6 g5h4 f6e4 h4e7 d8e7 c4d5 e4c3 b2c3 e6d5 d1b3 f8d8 c3c4 c8e6
FEN: rn1r2k1/ppp1qpp1/4b2p/3p4/2PP4/1Q2PN2/P4PPP/R3KB1R w KQ –

ECO: D57
Opening Name: Queen’s Gambit Declined: Lasker Defense, Main Line
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. Bg5 h6 6. Bh4 O-O 7. e3 Ne4 8. Bxe7 Qxe7 9. cxd5 Nxc3 10. bxc3
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 f8e7 g1f3 g8f6 c1g5 h7h6 g5h4 e8g8 e2e3 f6e4 h4e7 d8e7 c4d5 e4c3 b2c3
FEN: rnb2rk1/ppp1qpp1/4p2p/3P4/3P4/2P1PN2/P4PPP/R2QKB1R b KQ –

ECO: D58
Opening Name: Queen’s Gambit Declined: Tartakower Defense
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 h6 6. Bh4 O-O 7. e3 b6
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1g5 h7h6 g5h4 e8g8 e2e3 b7b6
FEN: rnbq1rk1/p1p1bpp1/1p2pn1p/3p4/2PP3B/2N1PN2/PP3PPP/R2QKB1R w KQ –

ECO: D58
Opening Name: Queen’s Gambit Declined: Tartakower Defense, Exchange Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. Bg5 h6 6. Bh4 O-O 7. e3 b6 8. cxd5 exd5
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 f8e7 g1f3 g8f6 c1g5 h7h6 g5h4 e8g8 e2e3 b7b6 c4d5 e6d5
FEN: rnbq1rk1/p1p1bpp1/1p3n1p/3p4/3P3B/2N1PN2/PP3PPP/R2QKB1R w KQ –

ECO: D59
Opening Name: Queen’s Gambit Declined: Tartakower Defense
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. Bg5 h6 6. Bh4 O-O 7. e3 b6 8. cxd5 Nxd5 9. Bxe7 Qxe7 10. Nxd5 exd5 11. Rc1 Be6
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 f8e7 g1f3 g8f6 c1g5 h7h6 g5h4 e8g8 e2e3 b7b6 c4d5 f6d5 h4e7 d8e7 c3d5 e6d5 a1c1 c8e6
FEN: rn3rk1/p1p1qpp1/1p2b2p/3p4/3P4/4PN2/PP3PPP/2RQKB1R w K –

ECO: D59
Opening Name: Queen’s Gambit Declined: Tartakower Defense, Makogonov Exchange Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. Bg5 h6 6. Bh4 O-O 7. e3 b6 8. cxd5 Nxd5
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 f8e7 g1f3 g8f6 c1g5 h7h6 g5h4 e8g8 e2e3 b7b6 c4d5 f6d5
FEN: rnbq1rk1/p1p1bpp1/1p2p2p/3n4/3P3B/2N1PN2/PP3PPP/R2QKB1R w KQ –

ECO: D60
Opening Name: Queen’s Gambit Declined: Orthodox Defense
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1g5 e8g8 e2e3 b8d7
FEN: r1bq1rk1/pppnbppp/4pn2/3p2B1/2PP4/2N1PN2/PP3PPP/R2QKB1R w KQ –

ECO: D60
Opening Name: Queen’s Gambit Declined: Orthodox Defense, Botvinnik Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Bd3
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1g5 e8g8 e2e3 b8d7 f1d3
FEN: r1bq1rk1/pppnbppp/4pn2/3p2B1/2PP4/2NBPN2/PP3PPP/R2QK2R b KQ –

ECO: D60
Opening Name: Queen’s Gambit Declined: Orthodox Defense, Rauzer Variation
SAN: 1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Qb3
UCI: d2d4 d7d5 g1f3 g8f6 c2c4 e7e6 b1c3 f8e7 c1g5 e8g8 e2e3 b8d7 d1b3
FEN: r1bq1rk1/pppnbppp/4pn2/3p2B1/2PP4/1QN1PN2/PP3PPP/R3KB1R b KQ –

ECO: D61
Opening Name: Queen’s Gambit Declined: Orthodox Defense, Rubinstein Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Qc2
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1g5 e8g8 e2e3 b8d7 d1c2
FEN: r1bq1rk1/pppnbppp/4pn2/3p2B1/2PP4/2N1PN2/PPQ2PPP/R3KB1R b KQ –

ECO: D62
Opening Name: Queen’s Gambit Declined: Orthodox Defense, Rubinstein Variation, Flohr Line
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Qc2 c5 8. cxd5
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1g5 e8g8 e2e3 b8d7 d1c2 c7c5 c4d5
FEN: r1bq1rk1/pp1nbppp/4pn2/2pP2B1/3P4/2N1PN2/PPQ2PPP/R3KB1R b KQ –

ECO: D63
Opening Name: Queen’s Gambit Declined: Orthodox Defense, Capablanca Variation
SAN: 1. Nf3 d5 2. d4 Nf6 3. c4 e6 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 b6 8. cxd5 exd5 9. Bb5
UCI: g1f3 d7d5 d2d4 g8f6 c2c4 e7e6 b1c3 f8e7 c1g5 e8g8 e2e3 b8d7 a1c1 b7b6 c4d5 e6d5 f1b5
FEN: r1bq1rk1/p1pnbppp/1p3n2/1B1p2B1/3P4/2N1PN2/PP3PPP/2RQK2R b K –

ECO: D63
Opening Name: Queen’s Gambit Declined: Orthodox Defense, Henneberger Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 a6
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1g5 e8g8 e2e3 b8d7 a1c1 a7a6
FEN: r1bq1rk1/1ppnbppp/p3pn2/3p2B1/2PP4/2N1PN2/PP3PPP/2RQKB1R w K –

ECO: D63
Opening Name: Queen’s Gambit Declined: Orthodox Defense, Main Line
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1g5 e8g8 e2e3 b8d7 a1c1
FEN: r1bq1rk1/pppnbppp/4pn2/3p2B1/2PP4/2N1PN2/PP3PPP/2RQKB1R b K –

ECO: D63
Opening Name: Queen’s Gambit Declined: Orthodox Defense, Main Line
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 c6
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1g5 e8g8 e2e3 b8d7 a1c1 c7c6
FEN: r1bq1rk1/pp1nbppp/2p1pn2/3p2B1/2PP4/2N1PN2/PP3PPP/2RQKB1R w K –

ECO: D63
Opening Name: Queen’s Gambit Declined: Orthodox Defense, Pillsbury Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 b6 8. cxd5 exd5 9. Bd3
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 d7d5 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 a1c1 b7b6 c4d5 e6d5 f1d3
FEN: r1bq1rk1/p1pnbppp/1p3n2/3p2B1/3P4/2NBPN2/PP3PPP/2RQK2R b K –

ECO: D63
Opening Name: Queen’s Gambit Declined: Orthodox Defense, Swiss, Carlsbad Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 a6 8. cxd5
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1g5 e8g8 e2e3 b8d7 a1c1 a7a6 c4d5
FEN: r1bq1rk1/1ppnbppp/p3pn2/3P2B1/3P4/2N1PN2/PP3PPP/2RQKB1R b K –

ECO: D64
Opening Name: Queen’s Gambit Declined: Orthodox Defense, Rubinstein Attack
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Nf3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 c6 8. a3 a6 9. Qc2
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 d7d5 g1f3 f8e7 c1g5 e8g8 e2e3 b8d7 a1c1 c7c6 a2a3 a7a6 d1c2
FEN: r1bq1rk1/1p1nbppp/p1p1pn2/3p2B1/2PP4/P1N1PN2/1PQ2PPP/2R1KB1R b K –

ECO: D64
Opening Name: Queen’s Gambit Declined: Orthodox Defense, Rubinstein Attack
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 c6 8. Qc2
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1g5 e8g8 e2e3 b8d7 a1c1 c7c6 d1c2
FEN: r1bq1rk1/pp1nbppp/2p1pn2/3p2B1/2PP4/2N1PN2/PPQ2PPP/2R1KB1R b K –

ECO: D64
Opening Name: Queen’s Gambit Declined: Orthodox Defense, Rubinstein Attack
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 c6 8. Qc2 a6
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1g5 e8g8 e2e3 b8d7 a1c1 c7c6 d1c2 a7a6
FEN: r1bq1rk1/1p1nbppp/p1p1pn2/3p2B1/2PP4/2N1PN2/PPQ2PPP/2R1KB1R w K –

ECO: D64
Opening Name: Queen’s Gambit Declined: Orthodox Defense, Rubinstein Attack
SAN: 1. Nf3 d5 2. d4 Nf6 3. c4 e6 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 c6 8. Qc2 Ne4
UCI: g1f3 d7d5 d2d4 g8f6 c2c4 e7e6 b1c3 f8e7 c1g5 e8g8 e2e3 b8d7 a1c1 c7c6 d1c2 f6e4
FEN: r1bq1rk1/pp1nbppp/2p1p3/3p2B1/2PPn3/2N1PN2/PPQ2PPP/2R1KB1R w K –

ECO: D65
Opening Name: Queen’s Gambit Declined: Orthodox Defense, Rubinstein Attack
SAN: 1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 c6 8. Qc2 a6 9. cxd5
UCI: d2d4 d7d5 g1f3 g8f6 c2c4 e7e6 b1c3 f8e7 c1g5 e8g8 e2e3 b8d7 a1c1 c7c6 d1c2 a7a6 c4d5
FEN: r1bq1rk1/1p1nbppp/p1p1pn2/3P2B1/3P4/2N1PN2/PPQ2PPP/2R1KB1R b K –

ECO: D66
Opening Name: Queen’s Gambit Declined: Orthodox Defense, Bd3 Line
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 a1c1 c7c6 f1d3
FEN: r1bq1rk1/pp1nbppp/2p1pn2/3p2B1/2PP4/2NBPN2/PP3PPP/2RQK2R b K –

ECO: D66
Opening Name: Queen’s Gambit Declined: Orthodox Defense, Fianchetto Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c6 5. Nf3 Be7 6. e3 Nbd7 7. Rc1 O-O 8. Bd3 dxc4 9. Bxc4 b5
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 c7c6 g1f3 f8e7 e2e3 b8d7 a1c1 e8g8 f1d3 d5c4 d3c4 b7b5
FEN: r1bq1rk1/p2nbppp/2p1pn2/1p4B1/2BP4/2N1PN2/PP3PPP/2RQK2R w K –

ECO: D67
Opening Name: Queen’s Gambit Declined: Orthodox Defense, Alekhine Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 11. Ne4
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 a1c1 c7c6 f1d3 d5c4 d3c4 f6d5 g5e7 d8e7 c3e4
FEN: r1b2rk1/pp1nqppp/2p1p3/3n4/2BPN3/4PN2/PP3PPP/2RQK2R b K –

ECO: D67
Opening Name: Queen’s Gambit Declined: Orthodox Defense, Bd3 Line
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 a1c1 c7c6 f1d3 d5c4 d3c4 f6d5 g5e7 d8e7
FEN: r1b2rk1/pp1nqppp/2p1p3/3n4/2BP4/2N1PN2/PP3PPP/2RQK2R w K –

ECO: D67
Opening Name: Queen’s Gambit Declined: Orthodox Defense, Capablanca System
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 a1c1 c7c6 f1d3 d5c4 d3c4 f6d5
FEN: r1bq1rk1/pp1nbppp/2p1p3/3n2B1/2BP4/2N1PN2/PP3PPP/2RQK2R w K –

ECO: D67
Opening Name: Queen’s Gambit Declined: Orthodox Defense, Janowski Variation
SAN: 1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5 10. h4
UCI: d2d4 d7d5 g1f3 g8f6 c2c4 e7e6 b1c3 f8e7 c1g5 e8g8 e2e3 b8d7 a1c1 c7c6 f1d3 d5c4 d3c4 f6d5 h2h4
FEN: r1bq1rk1/pp1nbppp/2p1p3/3n2B1/2BP3P/2N1PN2/PP3PP1/2RQK2R b K –

ECO: D67
Opening Name: Queen’s Gambit Declined: Orthodox Defense, Main Line
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 11. O-O
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 a1c1 c7c6 f1d3 d5c4 d3c4 f6d5 g5e7 d8e7 e1g1
FEN: r1b2rk1/pp1nqppp/2p1p3/3n4/2BP4/2N1PN2/PP3PPP/2RQ1RK1 b – –

ECO: D68
Opening Name: Queen’s Gambit Declined: Orthodox Defense, Classical Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 11. O-O Nxc3 12. Rxc3 e5
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 a1c1 c7c6 f1d3 d5c4 d3c4 f6d5 g5e7 d8e7 e1g1 d5c3 c1c3 e6e5
FEN: r1b2rk1/pp1nqppp/2p5/4p3/2BP4/2R1PN2/PP3PPP/3Q1RK1 w – –

ECO: D68
Opening Name: Queen’s Gambit Declined: Orthodox Defense, Classical Variation
SAN: 1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 11. O-O Nxc3 12. Rxc3 e5 13. Qb1
UCI: d2d4 d7d5 c2c4 e7e6 g1f3 g8f6 b1c3 f8e7 c1g5 e8g8 e2e3 b8d7 a1c1 c7c6 f1d3 d5c4 d3c4 f6d5 g5e7 d8e7 e1g1 d5c3 c1c3 e6e5 d1b1
FEN: r1b2rk1/pp1nqppp/2p5/4p3/2BP4/2R1PN2/PP3PPP/1Q3RK1 b – –

ECO: D68
Opening Name: Queen’s Gambit Declined: Orthodox Defense, Classical Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 11. O-O Nxc3 12. Rxc3 e5 13. Qc2
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1g5 e8g8 e2e3 b8d7 a1c1 c7c6 f1d3 d5c4 d3c4 f6d5 g5e7 d8e7 e1g1 d5c3 c1c3 e6e5 d1c2
FEN: r1b2rk1/pp1nqppp/2p5/4p3/2BP4/2R1PN2/PPQ2PPP/5RK1 b – –

ECO: D69
Opening Name: Queen’s Gambit Declined: Orthodox Defense, Classical Variation
SAN: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 11. O-O Nxc3 12. Rxc3 e5 13. dxe5 Nxe5 14. Nxe5 Qxe5
UCI: d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 a1c1 c7c6 f1d3 d5c4 d3c4 f6d5 g5e7 d8e7 e1g1 d5c3 c1c3 e6e5 d4e5 d7e5 f3e5 e7e5
FEN: r1b2rk1/pp3ppp/2p5/4q3/2B5/2R1P3/PP3PPP/3Q1RK1 w – –

ECO: D70
Opening Name: Neo-Grünfeld Defense: Goglidze Attack
SAN: 1. d4 Nf6 2. c4 g6 3. f3 d5
UCI: d2d4 g8f6 c2c4 g7g6 f2f3 d7d5
FEN: rnbqkb1r/ppp1pp1p/5np1/3p4/2PP4/5P2/PP2P1PP/RNBQKBNR w KQkq –

ECO: D70
Opening Name: Neo-Grünfeld Defense: with Nf3
SAN: 1. d4 Nf6 2. c4 g6 3. Nf3 d5
UCI: d2d4 g8f6 c2c4 g7g6 g1f3 d7d5
FEN: rnbqkb1r/ppp1pp1p/5np1/3p4/2PP4/5N2/PP2PPPP/RNBQKB1R w KQkq –

ECO: D70
Opening Name: Neo-Grünfeld Defense: with g3
SAN: 1. d4 Nf6 2. c4 g6 3. g3 d5
UCI: d2d4 g8f6 c2c4 g7g6 g2g3 d7d5
FEN: rnbqkb1r/ppp1pp1p/5np1/3p4/2PP4/6P1/PP2PP1P/RNBQKBNR w KQkq –

ECO: D71
Opening Name: Neo-Grünfeld Defense: Exchange Variation
SAN: 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 d5 5. cxd5 Nxd5
UCI: d2d4 g8f6 c2c4 g7g6 g2g3 f8g7 f1g2 d7d5 c4d5 f6d5
FEN: rnbqk2r/ppp1ppbp/6p1/3n4/3P4/6P1/PP2PPBP/RNBQK1NR w KQkq –

ECO: D74
Opening Name: Neo-Grünfeld Defense: Delayed Exchange Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d5 6. cxd5 Nxd5 7. O-O
UCI: d2d4 g8f6 c2c4 g7g6 g1f3 f8g7 g2g3 e8g8 f1g2 d7d5 c4d5 f6d5 e1g1
FEN: rnbq1rk1/ppp1ppbp/6p1/3n4/3P4/5NP1/PP2PPBP/RNBQ1RK1 b – –

ECO: D75
Opening Name: Neo-Grünfeld Defense: Delayed Exchange Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 O-O 5. g3 d5 6. cxd5 Nxd5 7. Bg2 c5 8. O-O
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 g1f3 e8g8 g2g3 d7d5 c4d5 f6d5 f1g2 c7c5 e1g1
FEN: rnbq1rk1/pp2ppbp/6p1/2pn4/3P4/2N2NP1/PP2PPBP/R1BQ1RK1 b – –

ECO: D75
Opening Name: Neo-Grünfeld Defense: Delayed Exchange Variation
SAN: 1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. g3 O-O 5. Bg2 d5 6. cxd5 Nxd5 7. O-O c5 8. dxc5
UCI: d2d4 g8f6 g1f3 g7g6 c2c4 f8g7 g2g3 e8g8 f1g2 d7d5 c4d5 f6d5 e1g1 c7c5 d4c5
FEN: rnbq1rk1/pp2ppbp/6p1/2Pn4/8/5NP1/PP2PPBP/RNBQ1RK1 b – –

ECO: D76
Opening Name: Neo-Grünfeld Defense: Delayed Exchange Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d5 6. cxd5 Nxd5 7. O-O Nb6
UCI: d2d4 g8f6 c2c4 g7g6 g1f3 f8g7 g2g3 e8g8 f1g2 d7d5 c4d5 f6d5 e1g1 d5b6
FEN: rnbq1rk1/ppp1ppbp/1n4p1/8/3P4/5NP1/PP2PPBP/RNBQ1RK1 w – –

ECO: D77
Opening Name: Neo-Grünfeld Defense: Classical Variation
SAN: 1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d5 6. c4
UCI: d2d4 g8f6 g1f3 g7g6 g2g3 f8g7 f1g2 e8g8 e1g1 d7d5 c2c4
FEN: rnbq1rk1/ppp1ppbp/5np1/3p4/2PP4/5NP1/PP2PPBP/RNBQ1RK1 b – –

ECO: D77
Opening Name: Neo-Grünfeld Defense: Classical Variation, Modern Defense
SAN: 1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d5 6. c4 dxc4
UCI: d2d4 g8f6 g1f3 g7g6 g2g3 f8g7 f1g2 e8g8 e1g1 d7d5 c2c4 d5c4
FEN: rnbq1rk1/ppp1ppbp/5np1/8/2pP4/5NP1/PP2PPBP/RNBQ1RK1 w – –

ECO: D77
Opening Name: Neo-Grünfeld Defense: Classical Variation, Polgar Variation
SAN: 1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d5 6. c4 Nc6
UCI: d2d4 g8f6 g1f3 g7g6 g2g3 f8g7 f1g2 e8g8 e1g1 d7d5 c2c4 b8c6
FEN: r1bq1rk1/ppp1ppbp/2n2np1/3p4/2PP4/5NP1/PP2PPBP/RNBQ1RK1 w – –

ECO: D78
Opening Name: Neo-Grünfeld Defense: Classical Variation, Original Defense
SAN: 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 c6 6. O-O d5
UCI: d2d4 g8f6 c2c4 g7g6 g1f3 f8g7 g2g3 e8g8 f1g2 c7c6 e1g1 d7d5
FEN: rnbq1rk1/pp2ppbp/2p2np1/3p4/2PP4/5NP1/PP2PPBP/RNBQ1RK1 w – –

ECO: D79
Opening Name: Neo-Grünfeld Defense: Ultra-Delayed Exchange Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 c6 6. O-O d5 7. cxd5 cxd5
UCI: d2d4 g8f6 c2c4 g7g6 g1f3 f8g7 g2g3 e8g8 f1g2 c7c6 e1g1 d7d5 c4d5 c6d5
FEN: rnbq1rk1/pp2ppbp/5np1/3p4/3P4/5NP1/PP2PPBP/RNBQ1RK1 w – –

ECO: D80
Opening Name: Grünfeld Defense
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5
FEN: rnbqkb1r/ppp1pp1p/5np1/3p4/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq –

ECO: D80
Opening Name: Grünfeld Defense: Gibbon Gambit
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. g4
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g2g4
FEN: rnbqkb1r/ppp1pp1p/5np1/3p4/2PP2P1/2N5/PP2PP1P/R1BQKBNR b KQkq –

ECO: D80
Opening Name: Grünfeld Defense: Lundin Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bg5 Ne4 5. Nxe4 dxe4 6. Qd2 c5
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c1g5 f6e4 c3e4 d5e4 d1d2 c7c5
FEN: rnbqkb1r/pp2pp1p/6p1/2p3B1/2PPp3/8/PP1QPPPP/R3KBNR w KQkq –

ECO: D80
Opening Name: Grünfeld Defense: Lutikov Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. f3
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 f2f3
FEN: rnbqkb1r/ppp1pp1p/5np1/3p4/2PP4/2N2P2/PP2P1PP/R1BQKBNR b KQkq –

ECO: D80
Opening Name: Grünfeld Defense: Lutikov Variation, Murrey Attack
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. f3 c5 5. cxd5 Nxd5 6. Na4
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 f2f3 c7c5 c4d5 f6d5 c3a4
FEN: rnbqkb1r/pp2pp1p/6p1/2pn4/N2P4/5P2/PP2P1PP/R1BQKBNR b KQkq –

ECO: D80
Opening Name: Grünfeld Defense: Stockholm Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bg5
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c1g5
FEN: rnbqkb1r/ppp1pp1p/5np1/3p2B1/2PP4/2N5/PP2PPPP/R2QKBNR b KQkq –

ECO: D80
Opening Name: Grünfeld Defense: Zaitsev Gambit
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. h4
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 h2h4
FEN: rnbqkb1r/ppp1pp1p/5np1/3p4/2PP3P/2N5/PP2PPP1/R1BQKBNR b KQkq –

ECO: D81
Opening Name: Grünfeld Defense: Russian Variation, Accelerated Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Qb3
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 d1b3
FEN: rnbqkb1r/ppp1pp1p/5np1/3p4/2PP4/1QN5/PP2PPPP/R1B1KBNR b KQkq –

ECO: D82
Opening Name: Grünfeld Defense: Brinckmann Attack
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c1f4
FEN: rnbqkb1r/ppp1pp1p/5np1/3p4/2PP1B2/2N5/PP2PPPP/R2QKBNR b KQkq –

ECO: D83
Opening Name: Grünfeld Defense: Brinckmann Attack, Grünfeld Gambit
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 O-O
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c1f4 f8g7 e2e3 e8g8
FEN: rnbq1rk1/ppp1ppbp/5np1/3p4/2PP1B2/2N1P3/PP3PPP/R2QKBNR w KQ –

ECO: D83
Opening Name: Grünfeld Defense: Brinckmann Attack, Grünfeld Gambit, Botvinnik Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 O-O 6. Rc1 c5 7. dxc5 Be6
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c1f4 f8g7 e2e3 e8g8 a1c1 c7c5 d4c5 c8e6
FEN: rn1q1rk1/pp2ppbp/4bnp1/2Pp4/2P2B2/2N1P3/PP3PPP/2RQKBNR w K –

ECO: D83
Opening Name: Grünfeld Defense: Brinckmann Attack, Grünfeld Gambit, Capablanca Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 O-O 6. Rc1
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c1f4 f8g7 e2e3 e8g8 a1c1
FEN: rnbq1rk1/ppp1ppbp/5np1/3p4/2PP1B2/2N1P3/PP3PPP/2RQKBNR b K –

ECO: D83
Opening Name: Grünfeld Defense: Brinckmann Attack, Reshevsky Gambit
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. Rc1 O-O 6. e3 c5 7. dxc5 Qa5
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c1f4 f8g7 a1c1 e8g8 e2e3 c7c5 d4c5 d8a5
FEN: rnb2rk1/pp2ppbp/5np1/q1Pp4/2P2B2/2N1P3/PP3PPP/2RQKBNR w K –

ECO: D84
Opening Name: Grünfeld Defense: Brinckmann Attack, Grünfeld Gambit Accepted
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 O-O 6. cxd5 Nxd5 7. Nxd5 Qxd5 8. Bxc7
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c1f4 f8g7 e2e3 e8g8 c4d5 f6d5 c3d5 d8d5 f4c7
FEN: rnb2rk1/ppB1ppbp/6p1/3q4/3P4/4P3/PP3PPP/R2QKBNR b KQ –

ECO: D85
Opening Name: Grünfeld Defense: Exchange Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c4d5 f6d5
FEN: rnbqkb1r/ppp1pp1p/6p1/3n4/3P4/2N5/PP2PPPP/R1BQKBNR w KQkq –

ECO: D85
Opening Name: Grünfeld Defense: Exchange Variation, Modern Exchange Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Nf3
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c4d5 f6d5 e2e4 d5c3 b2c3 f8g7 g1f3
FEN: rnbqk2r/ppp1ppbp/6p1/8/3PP3/2P2N2/P4PPP/R1BQKB1R b KQkq –

ECO: D85
Opening Name: Grünfeld Defense: Exchange Variation, Modern Exchange Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Nf3 c5
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c4d5 f6d5 e2e4 d5c3 b2c3 f8g7 g1f3 c7c5
FEN: rnbqk2r/pp2ppbp/6p1/2p5/3PP3/2P2N2/P4PPP/R1BQKB1R w KQkq –

ECO: D85
Opening Name: Grünfeld Defense: Exchange Variation, Modern Exchange Variation
SAN: 1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 d5 5. cxd5 Nxd5 6. e4 Nxc3 7. bxc3 c5 8. Rb1
UCI: d2d4 g8f6 g1f3 g7g6 c2c4 f8g7 b1c3 d7d5 c4d5 f6d5 e2e4 d5c3 b2c3 c7c5 a1b1
FEN: rnbqk2r/pp2ppbp/6p1/2p5/3PP3/2P2N2/P4PPP/1RBQKB1R b Kkq –

ECO: D85
Opening Name: Grünfeld Defense: Exchange Variation, Modern Exchange Variation, Kramnik’s Line
SAN: 1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 d5 5. cxd5 Nxd5 6. e4 Nxc3 7. bxc3 c5 8. h3
UCI: d2d4 g8f6 g1f3 g7g6 c2c4 f8g7 b1c3 d7d5 c4d5 f6d5 e2e4 d5c3 b2c3 c7c5 h2h3
FEN: rnbqk2r/pp2ppbp/6p1/2p5/3PP3/2P2N1P/P4PP1/R1BQKB1R b KQkq –

ECO: D85
Opening Name: Grünfeld Defense: Exchange Variation, Modern Exchange Variation, Pawn Grab Line
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Nf3 c5 8. Rb1 O-O 9. Be2 Nc6 10. d5 Bxc3+
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c4d5 f6d5 e2e4 d5c3 b2c3 f8g7 g1f3 c7c5 a1b1 e8g8 f1e2 b8c6 d4d5 g7c3
FEN: r1bq1rk1/pp2pp1p/2n3p1/2pP4/4P3/2b2N2/P3BPPP/1RBQK2R w K –

ECO: D85
Opening Name: Grünfeld Defense: Exchange Variation, Nadanian Attack
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. Na4
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c4d5 f6d5 c3a4
FEN: rnbqkb1r/ppp1pp1p/6p1/3n4/N2P4/8/PP2PPPP/R1BQKBNR b KQkq –

ECO: D86
Opening Name: Grünfeld Defense: Exchange Variation, Classical Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c4d5 f6d5 e2e4 d5c3 b2c3 f8g7 f1c4
FEN: rnbqk2r/ppp1ppbp/6p1/8/2BPP3/2P5/P4PPP/R1BQK1NR b KQkq –

ECO: D86
Opening Name: Grünfeld Defense: Exchange Variation, Larsen Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 O-O 8. Ne2 Qd7
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c4d5 f6d5 e2e4 d5c3 b2c3 f8g7 f1c4 e8g8 g1e2 d8d7
FEN: rnb2rk1/pppqppbp/6p1/8/2BPP3/2P5/P3NPPP/R1BQK2R w KQ –

ECO: D86
Opening Name: Grünfeld Defense: Exchange Variation, Larsen Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 O-O 8. Ne2 Qd7 9. O-O b6
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c4d5 f6d5 e2e4 d5c3 b2c3 f8g7 f1c4 e8g8 g1e2 d8d7 e1g1 b7b6
FEN: rnb2rk1/p1pqppbp/1p4p1/8/2BPP3/2P5/P3NPPP/R1BQ1RK1 w – –

ECO: D86
Opening Name: Grünfeld Defense: Exchange Variation, Simagin’s Improved Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 O-O 8. Ne2 Nc6
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c4d5 f6d5 e2e4 d5c3 b2c3 f8g7 f1c4 e8g8 g1e2 b8c6
FEN: r1bq1rk1/ppp1ppbp/2n3p1/8/2BPP3/2P5/P3NPPP/R1BQK2R w KQ –

ECO: D86
Opening Name: Grünfeld Defense: Exchange Variation, Simagin’s Lesser Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 O-O 8. Ne2 b6
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c4d5 f6d5 e2e4 d5c3 b2c3 f8g7 f1c4 e8g8 g1e2 b7b6
FEN: rnbq1rk1/p1p1ppbp/1p4p1/8/2BPP3/2P5/P3NPPP/R1BQK2R w KQ –

ECO: D87
Opening Name: Grünfeld Defense: Exchange Variation, Seville Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 Nc6 9. Be3 O-O 10. O-O Bg4 11. f3 Na5 12. Bxf7+
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c4d5 f6d5 e2e4 d5c3 b2c3 f8g7 f1c4 c7c5 g1e2 b8c6 c1e3 e8g8 e1g1 c8g4 f2f3 c6a5 c4f7
FEN: r2q1rk1/pp2pBbp/6p1/n1p5/3PP1b1/2P1BP2/P3N1PP/R2Q1RK1 b – –

ECO: D87
Opening Name: Grünfeld Defense: Exchange Variation, Spassky Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 O-O
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c4d5 f6d5 e2e4 d5c3 b2c3 f8g7 f1c4 c7c5 g1e2 e8g8
FEN: rnbq1rk1/pp2ppbp/6p1/2p5/2BPP3/2P5/P3NPPP/R1BQK2R w KQ –

ECO: D88
Opening Name: Grünfeld Defense: Exchange Variation, Spassky Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 Nc6 9. Be3 O-O 10. O-O cxd4 11. cxd4
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c4d5 f6d5 e2e4 d5c3 b2c3 f8g7 f1c4 c7c5 g1e2 b8c6 c1e3 e8g8 e1g1 c5d4 c3d4
FEN: r1bq1rk1/pp2ppbp/2n3p1/8/2BPP3/4B3/P3NPPP/R2Q1RK1 b – –

ECO: D89
Opening Name: Grünfeld Defense: Exchange Variation, Sokolsky Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 O-O 9. O-O Nc6 10. Be3 Bg4 11. f3 Na5 12. Bd3 cxd4 13. cxd4 Be6 14. d5
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c4d5 f6d5 e2e4 d5c3 b2c3 f8g7 f1c4 c7c5 g1e2 e8g8 e1g1 b8c6 c1e3 c8g4 f2f3 c6a5 c4d3 c5d4 c3d4 g4e6 d4d5
FEN: r2q1rk1/pp2ppbp/4b1p1/n2P4/4P3/3BBP2/P3N1PP/R2Q1RK1 b – –

ECO: D89
Opening Name: Grünfeld Defense: Exchange Variation, Spassky Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 Nc6 9. Be3 O-O 10. O-O Bg4 11. f3 Na5 12. Bd3 cxd4 13. cxd4 Be6
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c4d5 f6d5 e2e4 d5c3 b2c3 f8g7 f1c4 c7c5 g1e2 b8c6 c1e3 e8g8 e1g1 c8g4 f2f3 c6a5 c4d3 c5d4 c3d4 g4e6
FEN: r2q1rk1/pp2ppbp/4b1p1/n7/3PP3/3BBP2/P3N1PP/R2Q1RK1 w – –

ECO: D90
Opening Name: Grünfeld Defense: Flohr Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qa4+
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 d1a4
FEN: rnbqk2r/ppp1ppbp/5np1/3p4/Q1PP4/2N2N2/PP2PPPP/R1B1KB1R b KQkq –

ECO: D90
Opening Name: Grünfeld Defense: Three Knights Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3
FEN: rnbqkb1r/ppp1pp1p/5np1/3p4/2PP4/2N2N2/PP2PPPP/R1BQKB1R b KQkq –

ECO: D90
Opening Name: Grünfeld Defense: Three Knights Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7
FEN: rnbqk2r/ppp1ppbp/5np1/3p4/2PP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq –

ECO: D91
Opening Name: Grünfeld Defense: Three Knights Variation, Petrosian System
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Bg5
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 c1g5
FEN: rnbqk2r/ppp1ppbp/5np1/3p2B1/2PP4/2N2N2/PP2PPPP/R2QKB1R b KQkq –

ECO: D92
Opening Name: Grünfeld Defense: Three Knights Variation, Hungarian Attack
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Bf4
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 c1f4
FEN: rnbqk2r/ppp1ppbp/5np1/3p4/2PP1B2/2N2N2/PP2PPPP/R2QKB1R b KQkq –

ECO: D93
Opening Name: Grünfeld Defense: Three Knights Variation, Hungarian Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Bf4 O-O 6. e3
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 c1f4 e8g8 e2e3
FEN: rnbq1rk1/ppp1ppbp/5np1/3p4/2PP1B2/2N1PN2/PP3PPP/R2QKB1R b KQ –

ECO: D94
Opening Name: Grünfeld Defense: Flohr Defense
SAN: 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 g6 5. Nf3 Bg7 6. Bd3 O-O 7. O-O Bf5
UCI: d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 g7g6 g1f3 f8g7 f1d3 e8g8 e1g1 c8f5
FEN: rn1q1rk1/pp2ppbp/2p2np1/3p1b2/2PP4/2NBPN2/PP3PPP/R1BQ1RK1 w – –

ECO: D94
Opening Name: Grünfeld Defense: Makogonov Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 O-O 6. b4
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 e2e3 e8g8 b2b4
FEN: rnbq1rk1/ppp1ppbp/5np1/3p4/1PPP4/2N1PN2/P4PPP/R1BQKB1R b KQ –

ECO: D94
Opening Name: Grünfeld Defense: Opocensky Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 O-O 6. Bd2
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 e2e3 e8g8 c1d2
FEN: rnbq1rk1/ppp1ppbp/5np1/3p4/2PP4/2N1PN2/PP1B1PPP/R2QKB1R b KQ –

ECO: D94
Opening Name: Grünfeld Defense: Smyslov Defense
SAN: 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 g6 5. Nf3 Bg7 6. Bd3 O-O 7. O-O Bg4
UCI: d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 g7g6 g1f3 f8g7 f1d3 e8g8 e1g1 c8g4
FEN: rn1q1rk1/pp2ppbp/2p2np1/3p4/2PP2b1/2NBPN2/PP3PPP/R1BQ1RK1 w – –

ECO: D94
Opening Name: Grünfeld Defense: Three Knights Variation, Burille Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 e2e3
FEN: rnbqk2r/ppp1ppbp/5np1/3p4/2PP4/2N1PN2/PP3PPP/R1BQKB1R b KQkq –

ECO: D94
Opening Name: Grünfeld Defense: Three Knights Variation, Paris Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 O-O 6. Bd3
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 e2e3 e8g8 f1d3
FEN: rnbq1rk1/ppp1ppbp/5np1/3p4/2PP4/2NBPN2/PP3PPP/R1BQK2R b KQ –

ECO: D95
Opening Name: Grünfeld Defense: Botvinnik Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 O-O 6. Qb3 e6
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 e2e3 e8g8 d1b3 e7e6
FEN: rnbq1rk1/ppp2pbp/4pnp1/3p4/2PP4/1QN1PN2/PP3PPP/R1B1KB1R w KQ –

ECO: D95
Opening Name: Grünfeld Defense: Pachman Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. e3 Bg7 5. Qb3 dxc4 6. Bxc4 O-O 7. Nf3 Nbd7 8. Ng5
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 e2e3 f8g7 d1b3 d5c4 f1c4 e8g8 g1f3 b8d7 f3g5
FEN: r1bq1rk1/pppnppbp/5np1/6N1/2BP4/1QN1P3/PP3PPP/R1B1K2R b KQ –

ECO: D95
Opening Name: Grünfeld Defense: Three Knights Variation, Vienna Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 O-O 6. Qb3
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 e2e3 e8g8 d1b3
FEN: rnbq1rk1/ppp1ppbp/5np1/3p4/2PP4/1QN1PN2/PP3PPP/R1B1KB1R b KQ –

ECO: D96
Opening Name: Grünfeld Defense: Russian Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 d1b3
FEN: rnbqk2r/ppp1ppbp/5np1/3p4/2PP4/1QN2N2/PP2PPPP/R1B1KB1R b KQkq –

ECO: D97
Opening Name: Grünfeld Defense: Russian Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 d1b3 d5c4 b3c4 e8g8 e2e4
FEN: rnbq1rk1/ppp1ppbp/5np1/8/2QPP3/2N2N2/PP3PPP/R1B1KB1R b KQ –

ECO: D97
Opening Name: Grünfeld Defense: Russian Variation, Byrne Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 Nc6
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 d1b3 d5c4 b3c4 e8g8 e2e4 b8c6
FEN: r1bq1rk1/ppp1ppbp/2n2np1/8/2QPP3/2N2N2/PP3PPP/R1B1KB1R w KQ –

ECO: D97
Opening Name: Grünfeld Defense: Russian Variation, Hungarian Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 a6
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 d1b3 d5c4 b3c4 e8g8 e2e4 a7a6
FEN: rnbq1rk1/1pp1ppbp/p4np1/8/2QPP3/2N2N2/PP3PPP/R1B1KB1R w KQ –

ECO: D97
Opening Name: Grünfeld Defense: Russian Variation, Levenfish Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 b6
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 d1b3 d5c4 b3c4 e8g8 e2e4 b7b6
FEN: rnbq1rk1/p1p1ppbp/1p3np1/8/2QPP3/2N2N2/PP3PPP/R1B1KB1R w KQ –

ECO: D97
Opening Name: Grünfeld Defense: Russian Variation, Prins Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 Na6
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 d1b3 d5c4 b3c4 e8g8 e2e4 b8a6
FEN: r1bq1rk1/ppp1ppbp/n4np1/8/2QPP3/2N2N2/PP3PPP/R1B1KB1R w KQ –

ECO: D97
Opening Name: Grünfeld Defense: Russian Variation, Szabo Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 c6
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 d1b3 d5c4 b3c4 e8g8 e2e4 c7c6
FEN: rnbq1rk1/pp2ppbp/2p2np1/8/2QPP3/2N2N2/PP3PPP/R1B1KB1R w KQ –

ECO: D98
Opening Name: Grünfeld Defense: Russian Variation, Keres Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 Bg4 8. Be3 Nfd7 9. Be2 Nb6 10. Qd3 Nc6 11. O-O-O
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 d1b3 d5c4 b3c4 e8g8 e2e4 c8g4 c1e3 f6d7 f1e2 d7b6 c4d3 b8c6 e1c1
FEN: r2q1rk1/ppp1ppbp/1nn3p1/8/3PP1b1/2NQBN2/PP2BPPP/2KR3R b – –

ECO: D98
Opening Name: Grünfeld Defense: Russian Variation, Smyslov Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 Bg4
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 d1b3 d5c4 b3c4 e8g8 e2e4 c8g4
FEN: rn1q1rk1/ppp1ppbp/5np1/8/2QPP1b1/2N2N2/PP3PPP/R1B1KB1R w KQ –

ECO: D99
Opening Name: Grünfeld Defense: Russian Variation, Smyslov Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 Bg4 8. Be3 Nfd7 9. Qb3
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 d1b3 d5c4 b3c4 e8g8 e2e4 c8g4 c1e3 f6d7 c4b3
FEN: rn1q1rk1/pppnppbp/6p1/8/3PP1b1/1QN1BN2/PP3PPP/R3KB1R b KQ –

ECO: D99
Opening Name: Grünfeld Defense: Russian Variation, Yugoslav Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 Bg4 8. Be3 Nfd7 9. Qb3 c5
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 d1b3 d5c4 b3c4 e8g8 e2e4 c8g4 c1e3 f6d7 c4b3 c7c5
FEN: rn1q1rk1/pp1nppbp/6p1/2p5/3PP1b1/1QN1BN2/PP3PPP/R3KB1R w KQ –

ECO: E00
Opening Name: Catalan Opening
SAN: 1. d4 Nf6 2. c4 e6 3. g3
UCI: d2d4 g8f6 c2c4 e7e6 g2g3
FEN: rnbqkb1r/pppp1ppp/4pn2/8/2PP4/6P1/PP2PP1P/RNBQKBNR b KQkq –

ECO: E00
Opening Name: Catalan Opening
SAN: 1. d4 Nf6 2. c4 e6 3. g3 d5
UCI: d2d4 g8f6 c2c4 e7e6 g2g3 d7d5
FEN: rnbqkb1r/ppp2ppp/4pn2/3p4/2PP4/6P1/PP2PP1P/RNBQKBNR w KQkq –

ECO: E00
Opening Name: Catalan Opening: Hungarian Gambit
SAN: 1. d4 Nf6 2. c4 e6 3. g3 e5
UCI: d2d4 g8f6 c2c4 e7e6 g2g3 e6e5
FEN: rnbqkb1r/pppp1ppp/5n2/4p3/2PP4/6P1/PP2PP1P/RNBQKBNR w KQkq –

ECO: E00
Opening Name: Indian Defense
SAN: 1. d4 Nf6 2. c4 e6 3. Qb3
UCI: d2d4 g8f6 c2c4 e7e6 d1b3
FEN: rnbqkb1r/pppp1ppp/4pn2/8/2PP4/1Q6/PP2PPPP/RNB1KBNR b KQkq –

ECO: E00
Opening Name: Indian Defense: Devin Gambit
SAN: 1. d4 Nf6 2. c4 e6 3. g4
UCI: d2d4 g8f6 c2c4 e7e6 g2g4
FEN: rnbqkb1r/pppp1ppp/4pn2/8/2PP2P1/8/PP2PP1P/RNBQKBNR b KQkq –

ECO: E00
Opening Name: Indian Defense: Seirawan Attack
SAN: 1. d4 Nf6 2. c4 e6 3. Bg5
UCI: d2d4 g8f6 c2c4 e7e6 c1g5
FEN: rnbqkb1r/pppp1ppp/4pn2/6B1/2PP4/8/PP2PPPP/RN1QKBNR b KQkq –

ECO: E01
Opening Name: Catalan Opening: Closed
SAN: 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2
UCI: d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2
FEN: rnbqkb1r/ppp2ppp/4pn2/3p4/2PP4/6P1/PP2PPBP/RNBQK1NR b KQkq –

ECO: E02
Opening Name: Catalan Opening: Open Defense
SAN: 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4
UCI: d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 d5c4
FEN: rnbqkb1r/ppp2ppp/4pn2/8/2pP4/6P1/PP2PPBP/RNBQK1NR w KQkq –

ECO: E03
Opening Name: Catalan Opening: Open Defense
SAN: 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Qa4+ Nbd7 6. Qxc4
UCI: d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 d5c4 d1a4 b8d7 a4c4
FEN: r1bqkb1r/pppn1ppp/4pn2/8/2QP4/6P1/PP2PPBP/RNB1K1NR b KQkq –

ECO: E03
Opening Name: Catalan Opening: Open Defense, Alekhine Variation
SAN: 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Qa4+ Nbd7 6. Qxc4 a6 7. Qc2
UCI: d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 d5c4 d1a4 b8d7 a4c4 a7a6 c4c2
FEN: r1bqkb1r/1ppn1ppp/p3pn2/8/3P4/6P1/PPQ1PPBP/RNB1K1NR b KQkq –

ECO: E04
Opening Name: Catalan Opening: Open Defense
SAN: 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Nf3
UCI: d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 d5c4 g1f3
FEN: rnbqkb1r/ppp2ppp/4pn2/8/2pP4/5NP1/PP2PPBP/RNBQK2R b KQkq –

ECO: E04
Opening Name: Catalan Opening: Open Defense
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 c6 5. Bg2 dxc4
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 g2g3 c7c6 f1g2 d5c4
FEN: rnbqkb1r/pp3ppp/2p1pn2/8/2pP4/5NP1/PP2PPBP/RNBQK2R w KQkq –

ECO: E04
Opening Name: Catalan Opening: Open Defense, Modern Sharp Variation
SAN: 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Nf3 Nc6 6. Qa4 Bb4+
UCI: d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 d5c4 g1f3 b8c6 d1a4 f8b4
FEN: r1bqk2r/ppp2ppp/2n1pn2/8/QbpP4/5NP1/PP2PPBP/RNB1K2R w KQkq –

ECO: E05
Opening Name: Catalan Opening: Open Defense, Classical Line
SAN: 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Nf3 Be7
UCI: d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 d5c4 g1f3 f8e7
FEN: rnbqk2r/ppp1bppp/4pn2/8/2pP4/5NP1/PP2PPBP/RNBQK2R w KQkq –

ECO: E05
Opening Name: Catalan Opening: Open Defense, Classical Line
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Be7 5. Bg2 O-O 6. O-O dxc4
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 g2g3 f8e7 f1g2 e8g8 e1g1 d5c4
FEN: rnbq1rk1/ppp1bppp/4pn2/8/2pP4/5NP1/PP2PPBP/RNBQ1RK1 w – –

ECO: E06
Opening Name: Catalan Opening: Closed
SAN: 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3
UCI: d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 f8e7 g1f3
FEN: rnbqk2r/ppp1bppp/4pn2/3p4/2PP4/5NP1/PP2PPBP/RNBQK2R b KQkq –

ECO: E06
Opening Name: Catalan Opening: Closed
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Bb4+ 5. Bd2 Be7 6. Bg2 O-O 7. O-O c6 8. Bf4 b6
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 g2g3 f8b4 c1d2 b4e7 f1g2 e8g8 e1g1 c7c6 d2f4 b7b6
FEN: rnbq1rk1/p3bppp/1pp1pn2/3p4/2PP1B2/5NP1/PP2PPBP/RN1Q1RK1 w – –

ECO: E06
Opening Name: Catalan Opening: Closed
SAN: 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O c6 7. Qc2 b6 8. Nbd2 Bb7 9. e4 Na6
UCI: d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 f8e7 g1f3 e8g8 e1g1 c7c6 d1c2 b7b6 b1d2 c8b7 e2e4 b8a6
FEN: r2q1rk1/pb2bppp/npp1pn2/3p4/2PPP3/5NP1/PPQN1PBP/R1B2RK1 w – –

ECO: E07
Opening Name: Catalan Opening: Closed
SAN: 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7
UCI: d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 f8e7 g1f3 e8g8 e1g1 b8d7
FEN: r1bq1rk1/pppnbppp/4pn2/3p4/2PP4/5NP1/PP2PPBP/RNBQ1RK1 w – –

ECO: E07
Opening Name: Catalan Opening: Closed, Botvinnik Variation
SAN: 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7 7. Nc3 c6 8. Qd3
UCI: d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 f8e7 g1f3 e8g8 e1g1 b8d7 b1c3 c7c6 d1d3
FEN: r1bq1rk1/pp1nbppp/2p1pn2/3p4/2PP4/2NQ1NP1/PP2PPBP/R1B2RK1 b – –

ECO: E08
Opening Name: Catalan Opening: Closed
SAN: 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7 7. Qc2
UCI: d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 f8e7 g1f3 e8g8 e1g1 b8d7 d1c2
FEN: r1bq1rk1/pppnbppp/4pn2/3p4/2PP4/5NP1/PPQ1PPBP/RNB2RK1 b – –

ECO: E08
Opening Name: Catalan Opening: Closed
SAN: 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7 7. Qc2 c6 8. b3
UCI: d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 f8e7 g1f3 e8g8 e1g1 b8d7 d1c2 c7c6 b2b3
FEN: r1bq1rk1/pp1nbppp/2p1pn2/3p4/2PP4/1P3NP1/P1Q1PPBP/RNB2RK1 b – –

ECO: E08
Opening Name: Catalan Opening: Closed
SAN: 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7 7. Qc2 c6 8. b3 b6
UCI: d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 f8e7 g1f3 e8g8 e1g1 b8d7 d1c2 c7c6 b2b3 b7b6
FEN: r1bq1rk1/p2nbppp/1pp1pn2/3p4/2PP4/1P3NP1/P1Q1PPBP/RNB2RK1 w – –

ECO: E08
Opening Name: Catalan Opening: Closed
SAN: 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O c6 7. Qc2 b6 8. Rd1 Nbd7 9. Bf4
UCI: d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 f8e7 g1f3 e8g8 e1g1 c7c6 d1c2 b7b6 f1d1 b8d7 c1f4
FEN: r1bq1rk1/p2nbppp/1pp1pn2/3p4/2PP1B2/5NP1/PPQ1PPBP/RN1R2K1 b – –

ECO: E08
Opening Name: Catalan Opening: Closed
SAN: 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7 7. Qc2 c6 8. Bf4 b6 9. Nbd2 Bb7 10. e4
UCI: d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 f8e7 g1f3 e8g8 e1g1 b8d7 d1c2 c7c6 c1f4 b7b6 b1d2 c8b7 e2e4
FEN: r2q1rk1/pb1nbppp/1pp1pn2/3p4/2PPPB2/5NP1/PPQN1PBP/R4RK1 b – –

ECO: E08
Opening Name: Catalan Opening: Closed, Spassky Gambit
SAN: 1. d4 Nf6 2. c4 e6 3. g3 Be7 4. Bg2 d5 5. Nf3 O-O 6. O-O Nbd7 7. Qc2 c6 8. b3 b6 9. Rd1 Bb7 10. Nc3 b5
UCI: d2d4 g8f6 c2c4 e7e6 g2g3 f8e7 f1g2 d7d5 g1f3 e8g8 e1g1 b8d7 d1c2 c7c6 b2b3 b7b6 f1d1 c8b7 b1c3 b6b5
FEN: r2q1rk1/pb1nbppp/2p1pn2/1p1p4/2PP4/1PN2NP1/P1Q1PPBP/R1BR2K1 w – –

ECO: E08
Opening Name: Catalan Opening: Closed, Zagoryansky Variation
SAN: 1. d4 e6 2. c4 Nf6 3. Nf3 d5 4. g3 Be7 5. Bg2 O-O 6. O-O Nbd7 7. Qc2 c6 8. Rd1 b6 9. a4
UCI: d2d4 e7e6 c2c4 g8f6 g1f3 d7d5 g2g3 f8e7 f1g2 e8g8 e1g1 b8d7 d1c2 c7c6 f1d1 b7b6 a2a4
FEN: r1bq1rk1/p2nbppp/1pp1pn2/3p4/P1PP4/5NP1/1PQ1PPBP/RNBR2K1 b – –

ECO: E09
Opening Name: Catalan Opening: Closed Variation, Rabinovich Variation
SAN: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Qc2 e6 5. Nbd2 Be7 6. g3 Nbd7 7. Bg2 O-O 8. O-O b5
UCI: d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 d1c2 e7e6 b1d2 f8e7 g2g3 b8d7 f1g2 e8g8 e1g1 b7b5
FEN: r1bq1rk1/p2nbppp/2p1pn2/1p1p4/2PP4/5NP1/PPQNPPBP/R1B2RK1 w – –

ECO: E09
Opening Name: Catalan Opening: Closed Variation, Traditional Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Be7 5. Bg2 O-O 6. O-O Nbd7 7. Qc2 c6 8. Nbd2 b6
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 g2g3 f8e7 f1g2 e8g8 e1g1 b8d7 d1c2 c7c6 b1d2 b7b6
FEN: r1bq1rk1/p2nbppp/1pp1pn2/3p4/2PP4/5NP1/PPQNPPBP/R1B2RK1 w – –

ECO: E09
Opening Name: Catalan Opening: Closed, Main Line
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Be7 5. Bg2 O-O 6. O-O Nbd7 7. Qc2 c6 8. Nbd2
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 g2g3 f8e7 f1g2 e8g8 e1g1 b8d7 d1c2 c7c6 b1d2
FEN: r1bq1rk1/pp1nbppp/2p1pn2/3p4/2PP4/5NP1/PPQNPPBP/R1B2RK1 b – –

ECO: E09
Opening Name: Catalan Opening: Closed, Main Line
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Be7 5. Bg2 O-O 6. O-O c6 7. Qc2 b6 8. Nbd2 Bb7 9. e4 Nbd7
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 g2g3 f8e7 f1g2 e8g8 e1g1 c7c6 d1c2 b7b6 b1d2 c8b7 e2e4 b8d7
FEN: r2q1rk1/pb1nbppp/1pp1pn2/3p4/2PPP3/5NP1/PPQN1PBP/R1B2RK1 w – –

ECO: E09
Opening Name: Catalan Opening: Closed, Main Line
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Be7 5. Bg2 O-O 6. O-O Nbd7 7. Qc2 c6 8. Bf4 b6 9. Nbd2 Bb7 10. e4 dxe4 11. Nxe4 Nxe4 12. Qxe4
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 g2g3 f8e7 f1g2 e8g8 e1g1 b8d7 d1c2 c7c6 c1f4 b7b6 b1d2 c8b7 e2e4 d5e4 d2e4 f6e4 c2e4
FEN: r2q1rk1/pb1nbppp/1pp1p3/8/2PPQB2/5NP1/PP3PBP/R4RK1 b – –

ECO: E09
Opening Name: Catalan Opening: Closed, Sokolsky Variation
SAN: 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7 7. Qc2 c6 8. Nbd2 b6 9. b3 a5 10. Bb2 Ba6
UCI: d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 f8e7 g1f3 e8g8 e1g1 b8d7 d1c2 c7c6 b1d2 b7b6 b2b3 a7a5 c1b2 c8a6
FEN: r2q1rk1/3nbppp/bpp1pn2/p2p4/2PP4/1P3NP1/PBQNPPBP/R4RK1 w – –

ECO: E10
Opening Name: Blumenfeld Countergambit
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 b5
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 c7c5 d4d5 b7b5
FEN: rnbqkb1r/p2p1ppp/4pn2/1ppP4/2P5/5N2/PP2PPPP/RNBQKB1R w KQkq –

ECO: E10
Opening Name: Blumenfeld Countergambit Accepted
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 b5 5. dxe6 fxe6 6. cxb5 d5
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 c7c5 d4d5 b7b5 d5e6 f7e6 c4b5 d7d5
FEN: rnbqkb1r/p5pp/4pn2/1Ppp4/8/5N2/PP2PPPP/RNBQKB1R w KQkq –

ECO: E10
Opening Name: Blumenfeld Countergambit: Duz-Khotimirsky Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 b5 5. Bg5
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 c7c5 d4d5 b7b5 c1g5
FEN: rnbqkb1r/p2p1ppp/4pn2/1ppP2B1/2P5/5N2/PP2PPPP/RN1QKB1R b KQkq –

ECO: E10
Opening Name: Blumenfeld Countergambit: Spielmann Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 b5 5. Bg5 exd5 6. cxd5 h6
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 c7c5 d4d5 b7b5 c1g5 e6d5 c4d5 h7h6
FEN: rnbqkb1r/p2p1pp1/5n1p/1ppP2B1/8/5N2/PP2PPPP/RN1QKB1R w KQkq –

ECO: E10
Opening Name: Indian Defense: Anti-Nimzo-Indian
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3
UCI: d2d4 g8f6 c2c4 e7e6 g1f3
FEN: rnbqkb1r/pppp1ppp/4pn2/8/2PP4/5N2/PP2PPPP/RNBQKB1R b KQkq –

ECO: E10
Opening Name: Indian Defense: Dzindzi-Indian Defense
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 a6
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 a7a6
FEN: rnbqkb1r/1ppp1ppp/p3pn2/8/2PP4/5N2/PP2PPPP/RNBQKB1R w KQkq –

ECO: E10
Opening Name: Indian Defense: Döry Indian
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 Ne4
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 f6e4
FEN: rnbqkb1r/pppp1ppp/4p3/8/2PPn3/5N2/PP2PPPP/RNBQKB1R w KQkq –

ECO: E11
Opening Name: Bogo-Indian Defense
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 f8b4
FEN: rnbqk2r/pppp1ppp/4pn2/8/1bPP4/5N2/PP2PPPP/RNBQKB1R w KQkq –

ECO: E11
Opening Name: Bogo-Indian Defense: Exchange Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 Bxd2+
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 f8b4 c1d2 b4d2
FEN: rnbqk2r/pppp1ppp/4pn2/8/2PP4/5N2/PP1bPPPP/RN1QKB1R w KQkq –

ECO: E11
Opening Name: Bogo-Indian Defense: Grünfeld Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Nbd2
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 f8b4 b1d2
FEN: rnbqk2r/pppp1ppp/4pn2/8/1bPP4/5N2/PP1NPPPP/R1BQKB1R b KQkq –

ECO: E11
Opening Name: Bogo-Indian Defense: Haiti Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 Nc6
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 f8b4 c1d2 b8c6
FEN: r1bqk2r/pppp1ppp/2n1pn2/8/1bPP4/5N2/PP1BPPPP/RN1QKB1R w KQkq –

ECO: E11
Opening Name: Bogo-Indian Defense: Monticelli Trap
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Bb4+ 6. Bd2 Bxd2+ 7. Qxd2 O-O 8. Nc3 Ne4 9. Qc2 Nxc3 10. Ng5
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8b4 c1d2 b4d2 d1d2 e8g8 b1c3 f6e4 d2c2 e4c3 f3g5
FEN: rn1q1rk1/pbpp1ppp/1p2p3/6N1/2PP4/2n3P1/PPQ1PPBP/R3K2R b KQ –

ECO: E11
Opening Name: Bogo-Indian Defense: New England Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Nfd2
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 f8b4 f3d2
FEN: rnbqk2r/pppp1ppp/4pn2/8/1bPP4/8/PP1NPPPP/RNBQKB1R b KQkq –

ECO: E11
Opening Name: Bogo-Indian Defense: Nimzowitsch Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 Qe7
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 f8b4 c1d2 d8e7
FEN: rnb1k2r/ppppqppp/4pn2/8/1bPP4/5N2/PP1BPPPP/RN1QKB1R w KQkq –

ECO: E11
Opening Name: Bogo-Indian Defense: Retreat Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 Be7
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 f8b4 c1d2 b4e7
FEN: rnbqk2r/ppppbppp/4pn2/8/2PP4/5N2/PP1BPPPP/RN1QKB1R w KQkq –

ECO: E11
Opening Name: Bogo-Indian Defense: Retreat Variation
SAN: 1. d4 Nf6 2. c4 e6 3. g3 Bb4+ 4. Bd2 Be7 5. Bg2 d5 6. Nf3
UCI: d2d4 g8f6 c2c4 e7e6 g2g3 f8b4 c1d2 b4e7 f1g2 d7d5 g1f3
FEN: rnbqk2r/ppp1bppp/4pn2/3p4/2PP4/5NP1/PP1BPPBP/RN1QK2R b KQkq –

ECO: E11
Opening Name: Bogo-Indian Defense: Retreat Variation
SAN: 1. d4 Nf6 2. c4 e6 3. g3 Bb4+ 4. Bd2 Be7 5. Bg2 d5 6. Nf3 O-O
UCI: d2d4 g8f6 c2c4 e7e6 g2g3 f8b4 c1d2 b4e7 f1g2 d7d5 g1f3 e8g8
FEN: rnbq1rk1/ppp1bppp/4pn2/3p4/2PP4/5NP1/PP1BPPBP/RN1QK2R w KQ –

ECO: E11
Opening Name: Bogo-Indian Defense: Retreat Variation
SAN: 1. d4 Nf6 2. c4 e6 3. g3 Bb4+ 4. Bd2 Be7 5. Bg2 d5 6. Nf3 O-O 7. O-O
UCI: d2d4 g8f6 c2c4 e7e6 g2g3 f8b4 c1d2 b4e7 f1g2 d7d5 g1f3 e8g8 e1g1
FEN: rnbq1rk1/ppp1bppp/4pn2/3p4/2PP4/5NP1/PP1BPPBP/RN1Q1RK1 b – –

ECO: E11
Opening Name: Bogo-Indian Defense: Retreat Variation
SAN: 1. d4 Nf6 2. c4 e6 3. g3 Bb4+ 4. Bd2 Be7 5. Bg2 d5 6. Nf3 O-O 7. Qc2 c6 8. O-O
UCI: d2d4 g8f6 c2c4 e7e6 g2g3 f8b4 c1d2 b4e7 f1g2 d7d5 g1f3 e8g8 d1c2 c7c6 e1g1
FEN: rnbq1rk1/pp2bppp/2p1pn2/3p4/2PP4/5NP1/PPQBPPBP/RN3RK1 b – –

ECO: E11
Opening Name: Bogo-Indian Defense: Retreat Variation
SAN: 1. d4 Nf6 2. c4 e6 3. g3 Bb4+ 4. Bd2 Be7 5. Bg2 d5 6. Nf3 Nbd7 7. O-O O-O 8. Qc2 c6
UCI: d2d4 g8f6 c2c4 e7e6 g2g3 f8b4 c1d2 b4e7 f1g2 d7d5 g1f3 b8d7 e1g1 e8g8 d1c2 c7c6
FEN: r1bq1rk1/pp1nbppp/2p1pn2/3p4/2PP4/5NP1/PPQBPPBP/RN3RK1 w – –

ECO: E11
Opening Name: Bogo-Indian Defense: Retreat Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Bb4+ 5. Bd2 Be7 6. Bg2 O-O 7. O-O c6 8. Qc2 Nbd7 9. Bf4 b6 10. Nbd2
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 g2g3 f8b4 c1d2 b4e7 f1g2 e8g8 e1g1 c7c6 d1c2 b8d7 d2f4 b7b6 b1d2
FEN: r1bq1rk1/p2nbppp/1pp1pn2/3p4/2PP1B2/5NP1/PPQNPPBP/R4RK1 b – –

ECO: E11
Opening Name: Bogo-Indian Defense: Retreat Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Bb4+ 5. Bd2 Be7 6. Bg2 O-O 7. O-O c6 8. Qc2 Nbd7 9. Bf4 b6 10. Nbd2 Ba6
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 g2g3 f8b4 c1d2 b4e7 f1g2 e8g8 e1g1 c7c6 d1c2 b8d7 d2f4 b7b6 b1d2 c8a6
FEN: r2q1rk1/p2nbppp/bpp1pn2/3p4/2PP1B2/5NP1/PPQNPPBP/R4RK1 w – –

ECO: E11
Opening Name: Bogo-Indian Defense: Vitolins Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 c5
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 f8b4 c1d2 c7c5
FEN: rnbqk2r/pp1p1ppp/4pn2/2p5/1bPP4/5N2/PP1BPPPP/RN1QKB1R w KQkq –

ECO: E11
Opening Name: Bogo-Indian Defense: Wade-Smyslov Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 a5
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 f8b4 c1d2 a7a5
FEN: rnbqk2r/1ppp1ppp/4pn2/p7/1bPP4/5N2/PP1BPPPP/RN1QKB1R w KQkq –

ECO: E12
Opening Name: Nimzo-Indian Defense: Three Knights Variation, Duchamp Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Nc3 Bb4
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 b1c3 f8b4
FEN: rnbqk2r/p1pp1ppp/1p2pn2/8/1bPP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq –

ECO: E12
Opening Name: Nimzo-Indian Defense: Three Knights Variation, Duchamp Variation, Modern Line
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Nc3 Bb4 5. Bg5 Bb7 6. Nd2
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 b1c3 f8b4 c1g5 c8b7 f3d2
FEN: rn1qk2r/pbpp1ppp/1p2pn2/6B1/1bPP4/2N5/PP1NPPPP/R2QKB1R b KQkq –

ECO: E12
Opening Name: Queen’s Indian Defense
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6
FEN: rnbqkb1r/p1pp1ppp/1p2pn2/8/2PP4/5N2/PP2PPPP/RNBQKB1R w KQkq –

ECO: E12
Opening Name: Queen’s Indian Defense: Kasparov Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Nc3
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 b1c3
FEN: rnbqkb1r/p1pp1ppp/1p2pn2/8/2PP4/2N2N2/PP2PPPP/R1BQKB1R b KQkq –

ECO: E12
Opening Name: Queen’s Indian Defense: Kasparov Variation, Botvinnik Attack
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Nc3 Bb7 5. Bg5 h6 6. Bh4 g5 7. Bg3 Nh5
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 b1c3 c8b7 c1g5 h7h6 g5h4 g7g5 h4g3 f6h5
FEN: rn1qkb1r/pbpp1p2/1p2p2p/6pn/2PP4/2N2NB1/PP2PPPP/R2QKB1R w KQkq –

ECO: E12
Opening Name: Queen’s Indian Defense: Kasparov-Petrosian Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 a2a3 c8b7 b1c3
FEN: rn1qkb1r/pbpp1ppp/1p2pn2/8/2PP4/P1N2N2/1P2PPPP/R1BQKB1R b KQkq –

ECO: E12
Opening Name: Queen’s Indian Defense: Kasparov-Petrosian Variation, Andersson Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 Ne4
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 a2a3 c8b7 b1c3 f6e4
FEN: rn1qkb1r/pbpp1ppp/1p2p3/8/2PPn3/P1N2N2/1P2PPPP/R1BQKB1R w KQkq –

ECO: E12
Opening Name: Queen’s Indian Defense: Kasparov-Petrosian Variation, Classical Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 d5 6. cxd5 exd5
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 a2a3 c8b7 b1c3 d7d5 c4d5 e6d5
FEN: rn1qkb1r/pbp2ppp/1p3n2/3p4/3P4/P1N2N2/1P2PPPP/R1BQKB1R w KQkq –

ECO: E12
Opening Name: Queen’s Indian Defense: Kasparov-Petrosian Variation, Hedgehog Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 g6
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 a2a3 c8b7 b1c3 g7g6
FEN: rn1qkb1r/pbpp1p1p/1p2pnp1/8/2PP4/P1N2N2/1P2PPPP/R1BQKB1R w KQkq –

ECO: E12
Opening Name: Queen’s Indian Defense: Kasparov-Petrosian Variation, Kasparov Attack
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 d5 6. cxd5 Nxd5 7. Qc2
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 a2a3 c8b7 b1c3 d7d5 c4d5 f6d5 d1c2
FEN: rn1qkb1r/pbp2ppp/1p2p3/3n4/3P4/P1N2N2/1PQ1PPPP/R1B1KB1R b KQkq –

ECO: E12
Opening Name: Queen’s Indian Defense: Kasparov-Petrosian Variation, Main Line
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 d5
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 a2a3 c8b7 b1c3 d7d5
FEN: rn1qkb1r/pbp2ppp/1p2pn2/3p4/2PP4/P1N2N2/1P2PPPP/R1BQKB1R w KQkq –

ECO: E12
Opening Name: Queen’s Indian Defense: Kasparov-Petrosian Variation, Marco Defense
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 Be7
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 a2a3 c8b7 b1c3 f8e7
FEN: rn1qk2r/pbppbppp/1p2pn2/8/2PP4/P1N2N2/1P2PPPP/R1BQKB1R w KQkq –

ECO: E12
Opening Name: Queen’s Indian Defense: Kasparov-Petrosian Variation, Modern Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 d5 6. cxd5 Nxd5
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 a2a3 c8b7 b1c3 d7d5 c4d5 f6d5
FEN: rn1qkb1r/pbp2ppp/1p2p3/3n4/3P4/P1N2N2/1P2PPPP/R1BQKB1R w KQkq –

ECO: E12
Opening Name: Queen’s Indian Defense: Kasparov-Petrosian Variation, Petrosian Attack
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 d5 6. cxd5 Nxd5 7. e3
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 a2a3 c8b7 b1c3 d7d5 c4d5 f6d5 e2e3
FEN: rn1qkb1r/pbp2ppp/1p2p3/3n4/3P4/P1N1PN2/1P3PPP/R1BQKB1R b KQkq –

ECO: E12
Opening Name: Queen’s Indian Defense: Kasparov-Petrosian Variation, Polovodin Gambit
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Nc3 Bb7 5. a3 d5 6. cxd5 Nxd5 7. e4
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 b1c3 c8b7 a2a3 d7d5 c4d5 f6d5 e2e4
FEN: rn1qkb1r/pbp2ppp/1p2p3/3n4/3PP3/P1N2N2/1P3PPP/R1BQKB1R b KQkq –

ECO: E12
Opening Name: Queen’s Indian Defense: Kasparov-Petrosian Variation, Rashkovsky Attack
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 d5 6. cxd5 Nxd5 7. Qa4+
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 a2a3 c8b7 b1c3 d7d5 c4d5 f6d5 d1a4
FEN: rn1qkb1r/pbp2ppp/1p2p3/3n4/Q2P4/P1N2N2/1P2PPPP/R1B1KB1R b KQkq –

ECO: E12
Opening Name: Queen’s Indian Defense: Kasparov-Petrosian Variation, Romanishin Attack
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 d5 6. cxd5 Nxd5 7. Bd2
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 a2a3 c8b7 b1c3 d7d5 c4d5 f6d5 c1d2
FEN: rn1qkb1r/pbp2ppp/1p2p3/3n4/3P4/P1N2N2/1P1BPPPP/R2QKB1R b KQkq –

ECO: E12
Opening Name: Queen’s Indian Defense: Miles Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Bf4
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 c1f4
FEN: rnbqkb1r/p1pp1ppp/1p2pn2/8/2PP1B2/5N2/PP2PPPP/RN1QKB1R b KQkq –

ECO: E12
Opening Name: Queen’s Indian Defense: Petrosian Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 a2a3
FEN: rnbqkb1r/p1pp1ppp/1p2pn2/8/2PP4/P4N2/1P2PPPP/RNBQKB1R b KQkq –

ECO: E12
Opening Name: Queen’s Indian Defense: Petrosian Variation, Farago Defense
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Ba6 5. Qc2 Bb7
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 a2a3 c8a6 d1c2 a6b7
FEN: rn1qkb1r/pbpp1ppp/1p2pn2/8/2PP4/P4N2/1PQ1PPPP/RNB1KB1R w KQkq –

ECO: E13
Opening Name: Queen’s Indian Defense: Kasparov Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Nc3 Bb4 5. Bg5 h6 6. Bh4 Bb7
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 b1c3 f8b4 c1g5 h7h6 g5h4 c8b7
FEN: rn1qk2r/pbpp1pp1/1p2pn1p/8/1bPP3B/2N2N2/PP2PPPP/R2QKB1R w KQkq –

ECO: E14
Opening Name: Queen’s Indian Defense: Averbakh Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. e3 Bb7 5. Bd3 c5 6. O-O Be7 7. b3 O-O 8. Bb2 cxd4 9. Nxd4
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 e2e3 c8b7 f1d3 c7c5 e1g1 f8e7 b2b3 e8g8 c1b2 c5d4 f3d4
FEN: rn1q1rk1/pb1pbppp/1p2pn2/8/2PN4/1P1BP3/PB3PPP/RN1Q1RK1 b – –

ECO: E14
Opening Name: Queen’s Indian Defense: Spassky System
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. e3
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 e2e3
FEN: rnbqkb1r/p1pp1ppp/1p2pn2/8/2PP4/4PN2/PP3PPP/RNBQKB1R b KQkq –

ECO: E15
Opening Name: Queen’s Indian Defense: Buerger Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 c5 6. d5 exd5 7. Ng5
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 c7c5 d4d5 e6d5 f3g5
FEN: rn1qkb1r/pb1p1ppp/1p3n2/2pp2N1/2P5/6P1/PP2PPBP/RNBQK2R b KQkq –

ECO: E15
Opening Name: Queen’s Indian Defense: Fianchetto Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3
FEN: rnbqkb1r/p1pp1ppp/1p2pn2/8/2PP4/5NP1/PP2PP1P/RNBQKB1R b KQkq –

ECO: E15
Opening Name: Queen’s Indian Defense: Fianchetto Variation, Check Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 5. b3 Bb4+
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8a6 b2b3 f8b4
FEN: rn1qk2r/p1pp1ppp/bp2pn2/8/1bPP4/1P3NP1/P3PP1P/RNBQKB1R w KQkq –

ECO: E15
Opening Name: Queen’s Indian Defense: Fianchetto Variation, Check Variation, Intermezzo Line
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 5. b3 Bb4+ 6. Bd2 Be7
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8a6 b2b3 f8b4 c1d2 b4e7
FEN: rn1qk2r/p1ppbppp/bp2pn2/8/2PP4/1P3NP1/P2BPP1P/RN1QKB1R w KQkq –

ECO: E15
Opening Name: Queen’s Indian Defense: Fianchetto Variation, Check Variation, Modern Line
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 5. b3 Bb4+ 6. Bd2 Qe7
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8a6 b2b3 f8b4 c1d2 d8e7
FEN: rn2k2r/p1ppqppp/bp2pn2/8/1bPP4/1P3NP1/P2BPP1P/RN1QKB1R w KQkq –

ECO: E15
Opening Name: Queen’s Indian Defense: Fianchetto Variation, Nimzowitsch Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8a6
FEN: rn1qkb1r/p1pp1ppp/bp2pn2/8/2PP4/5NP1/PP2PP1P/RNBQKB1R w KQkq –

ECO: E15
Opening Name: Queen’s Indian Defense: Fianchetto Variation, Nimzowitsch Variation, Nimzowitsch Attack
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 5. Qa4
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8a6 d1a4
FEN: rn1qkb1r/p1pp1ppp/bp2pn2/8/Q1PP4/5NP1/PP2PP1P/RNB1KB1R b KQkq –

ECO: E15
Opening Name: Queen’s Indian Defense: Fianchetto Variation, Nimzowitsch Variation, Quiet Line
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 5. b3
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8a6 b2b3
FEN: rn1qkb1r/p1pp1ppp/bp2pn2/8/2PP4/1P3NP1/P3PP1P/RNBQKB1R b KQkq –

ECO: E15
Opening Name: Queen’s Indian Defense: Fianchetto Variation, Nimzowitsch Variation, Timman’s Line
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 5. Qb3
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8a6 d1b3
FEN: rn1qkb1r/p1pp1ppp/bp2pn2/8/2PP4/1Q3NP1/PP2PP1P/RNB1KB1R b KQkq –

ECO: E15
Opening Name: Queen’s Indian Defense: Fianchetto Variation, Rubinstein Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 c5 6. d5 exd5 7. Nh4
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 c7c5 d4d5 e6d5 f3h4
FEN: rn1qkb1r/pb1p1ppp/1p3n2/2pp4/2P4N/6P1/PP2PPBP/RNBQK2R b KQkq –

ECO: E15
Opening Name: Queen’s Indian Defense: Fianchetto Variation, Sämisch Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 c5
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 c7c5
FEN: rn1qkb1r/pb1p1ppp/1p2pn2/2p5/2PP4/5NP1/PP2PPBP/RNBQK2R w KQkq –

ECO: E15
Opening Name: Queen’s Indian Defense: Fianchetto Variation, Traditional Line
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7
FEN: rn1qkb1r/pbpp1ppp/1p2pn2/8/2PP4/5NP1/PP2PP1P/RNBQKB1R w KQkq –

ECO: E16
Opening Name: Queen’s Indian Defense: Capablanca Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Bb4+
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8b4
FEN: rn1qk2r/pbpp1ppp/1p2pn2/8/1bPP4/5NP1/PP2PPBP/RNBQK2R w KQkq –

ECO: E16
Opening Name: Queen’s Indian Defense: Riumin Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Bb4+ 6. Bd2 Be7
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8b4 c1d2 b4e7
FEN: rn1qk2r/pbppbppp/1p2pn2/8/2PP4/5NP1/PP1BPPBP/RN1QK2R w KQkq –

ECO: E16
Opening Name: Queen’s Indian Defense: Yates Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 a5 5. g3 b6 6. Bg2 Bb7
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 f8b4 c1d2 a7a5 g2g3 b7b6 f1g2 c8b7
FEN: rn1qk2r/1bpp1ppp/1p2pn2/p7/1bPP4/5NP1/PP1BPPBP/RN1QK2R w KQkq –

ECO: E17
Opening Name: Queen’s Indian Defense: Anti-Queen’s Indian System
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. Nc3
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8e7 b1c3
FEN: rn1qk2r/pbppbppp/1p2pn2/8/2PP4/2N2NP1/PP2PPBP/R1BQK2R b KQkq –

ECO: E17
Opening Name: Queen’s Indian Defense: Classical Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8e7 e1g1
FEN: rn1qk2r/pbppbppp/1p2pn2/8/2PP4/5NP1/PP2PPBP/RNBQ1RK1 b kq –

ECO: E17
Opening Name: Queen’s Indian Defense: Classical Variation, Polugaevsky Gambit
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. d5 exd5 8. Nh4
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8e7 e1g1 e8g8 d4d5 e6d5 f3h4
FEN: rn1q1rk1/pbppbppp/1p3n2/3p4/2P4N/6P1/PP2PPBP/RNBQ1RK1 b – –

ECO: E17
Opening Name: Queen’s Indian Defense: Classical Variation, Taimanov Gambit
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. d5 exd5 8. Nd4
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8e7 e1g1 e8g8 d4d5 e6d5 f3d4
FEN: rn1q1rk1/pbppbppp/1p3n2/3p4/2PN4/6P1/PP2PPBP/RNBQ1RK1 b – –

ECO: E17
Opening Name: Queen’s Indian Defense: Euwe Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. b3
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8e7 e1g1 e8g8 b2b3
FEN: rn1q1rk1/pbppbppp/1p2pn2/8/2PP4/1P3NP1/P3PPBP/RNBQ1RK1 b – –

ECO: E17
Opening Name: Queen’s Indian Defense: Fianchetto Variation, Kramnik Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Re1
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8e7 e1g1 e8g8 f1e1
FEN: rn1q1rk1/pbppbppp/1p2pn2/8/2PP4/5NP1/PP2PPBP/RNBQR1K1 b – –

ECO: E17
Opening Name: Queen’s Indian Defense: Opocensky Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. Nc3 Ne4 7. Bd2
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8e7 b1c3 f6e4 c1d2
FEN: rn1qk2r/pbppbppp/1p2p3/8/2PPn3/2N2NP1/PP1BPPBP/R2QK2R b KQkq –

ECO: E17
Opening Name: Queen’s Indian Defense: Traditional Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8e7
FEN: rn1qk2r/pbppbppp/1p2pn2/8/2PP4/5NP1/PP2PPBP/RNBQK2R w KQkq –

ECO: E18
Opening Name: Queen’s Indian Defense: Classical Variation, Tiviakov Defense
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3 Na6
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8e7 e1g1 e8g8 b1c3 b8a6
FEN: r2q1rk1/pbppbppp/np2pn2/8/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w – –

ECO: E18
Opening Name: Queen’s Indian Defense: Classical Variation, Traditional Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8e7 e1g1 e8g8 b1c3
FEN: rn1q1rk1/pbppbppp/1p2pn2/8/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 b – –

ECO: E18
Opening Name: Queen’s Indian Defense: Classical Variation, Traditional Variation, Nimzowitsch Line
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3 d5
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8e7 e1g1 e8g8 b1c3 d7d5
FEN: rn1q1rk1/pbp1bppp/1p2pn2/3p4/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w – –

ECO: E19
Opening Name: Queen’s Indian Defense: Classical Variation, Traditional Variation, Main Line
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3 Ne4 8. Qc2 Nxc3 9. Qxc3
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8e7 e1g1 e8g8 b1c3 f6e4 d1c2 e4c3 c2c3
FEN: rn1q1rk1/pbppbppp/1p2p3/8/2PP4/2Q2NP1/PP2PPBP/R1B2RK1 b – –

ECO: E20
Opening Name: Nimzo-Indian Defense
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4
FEN: rnbqk2r/pppp1ppp/4pn2/8/1bPP4/2N5/PP2PPPP/R1BQKBNR w KQkq –

ECO: E20
Opening Name: Nimzo-Indian Defense: Kmoch Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. f3
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 f2f3
FEN: rnbqk2r/pppp1ppp/4pn2/8/1bPP4/2N2P2/PP2P1PP/R1BQKBNR b KQkq –

ECO: E20
Opening Name: Nimzo-Indian Defense: Mikenas Attack
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qd3
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1d3
FEN: rnbqk2r/pppp1ppp/4pn2/8/1bPP4/2NQ4/PP2PPPP/R1B1KBNR b KQkq –

ECO: E20
Opening Name: Nimzo-Indian Defense: Romanishin Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. g3
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 g2g3
FEN: rnbqk2r/pppp1ppp/4pn2/8/1bPP4/2N3P1/PP2PP1P/R1BQKBNR b KQkq –

ECO: E20
Opening Name: Nimzo-Indian Defense: Romanishin Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 c5 5. g3 O-O 6. Bg2
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 g1f3 c7c5 g2g3 e8g8 f1g2
FEN: rnbq1rk1/pp1p1ppp/4pn2/2p5/1bPP4/2N2NP1/PP2PPBP/R1BQK2R b KQ –

ECO: E20
Opening Name: Nimzo-Indian Defense: Romanishin Variation, English Hybrid
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 c5 5. g3 cxd4 6. Nxd4 O-O 7. Bg2 d5 8. cxd5 Nxd5
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 g1f3 c7c5 g2g3 c5d4 f3d4 e8g8 f1g2 d7d5 c4d5 f6d5
FEN: rnbq1rk1/pp3ppp/4p3/3n4/1b1N4/2N3P1/PP2PPBP/R1BQK2R w KQ –

ECO: E21
Opening Name: Nimzo-Indian Defense: Three Knights Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 g1f3
FEN: rnbqk2r/pppp1ppp/4pn2/8/1bPP4/2N2N2/PP2PPPP/R1BQKB1R b KQkq –

ECO: E21
Opening Name: Nimzo-Indian Defense: Three Knights Variation, Euwe Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 c5 5. d5 Ne4
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 g1f3 c7c5 d4d5 f6e4
FEN: rnbqk2r/pp1p1ppp/4p3/2pP4/1bP1n3/2N2N2/PP2PPPP/R1BQKB1R w KQkq –

ECO: E21
Opening Name: Nimzo-Indian Defense: Three Knights Variation, Korchnoi Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 c5 5. d5
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 g1f3 c7c5 d4d5
FEN: rnbqk2r/pp1p1ppp/4pn2/2pP4/1bP5/2N2N2/PP2PPPP/R1BQKB1R b KQkq –

ECO: E21
Opening Name: Nimzo-Indian Defense: Three Knights Variation, Shocron Gambit
SAN: 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Nc3 c5 5. d5 b5
UCI: d2d4 g8f6 c2c4 e7e6 g1f3 f8b4 b1c3 c7c5 d4d5 b7b5
FEN: rnbqk2r/p2p1ppp/4pn2/1ppP4/1bP5/2N2N2/PP2PPPP/R1BQKB1R w KQkq –

ECO: E22
Opening Name: Nimzo-Indian Defense: Spielmann Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qb3
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1b3
FEN: rnbqk2r/pppp1ppp/4pn2/8/1bPP4/1QN5/PP2PPPP/R1B1KBNR b KQkq –

ECO: E23
Opening Name: Nimzo-Indian Defense: Spielmann Variation, Carlsbad Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qb3 c5 5. dxc5 Nc6 6. Nf3 Ne4 7. Bd2 Nxd2
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1b3 c7c5 d4c5 b8c6 g1f3 f6e4 c1d2 e4d2
FEN: r1bqk2r/pp1p1ppp/2n1p3/2P5/1bP5/1QN2N2/PP1nPPPP/R3KB1R w KQkq –

ECO: E23
Opening Name: Nimzo-Indian Defense: Spielmann Variation, Romanovsky Gambit
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qb3 c5 5. dxc5 Nc6
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1b3 c7c5 d4c5 b8c6
FEN: r1bqk2r/pp1p1ppp/2n1pn2/2P5/1bP5/1QN5/PP2PPPP/R1B1KBNR w KQkq –

ECO: E23
Opening Name: Nimzo-Indian Defense: Spielmann Variation, Stahlberg Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qb3 c5 5. dxc5 Nc6 6. Nf3 Ne4 7. Bd2 Nxc5
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1b3 c7c5 d4c5 b8c6 g1f3 f6e4 c1d2 e4c5
FEN: r1bqk2r/pp1p1ppp/2n1p3/2n5/1bP5/1QN2N2/PP1BPPPP/R3KB1R w KQkq –

ECO: E23
Opening Name: Nimzo-Indian Defense: Spielmann Variation, Stahlberg Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qb3 c5 5. dxc5 Nc6 6. Nf3 Ne4 7. Bd2 Nxc5 8. Qc2 f5 9. g3
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1b3 c7c5 d4c5 b8c6 g1f3 f6e4 c1d2 e4c5 b3c2 f7f5 g2g3
FEN: r1bqk2r/pp1p2pp/2n1p3/2n2p2/1bP5/2N2NP1/PPQBPP1P/R3KB1R b KQkq –

ECO: E24
Opening Name: Nimzo-Indian Defense: Sämisch Variation, Accelerated
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 a2a3 b4c3 b2c3
FEN: rnbqk2r/pppp1ppp/4pn2/8/2PP4/P1P5/4PPPP/R1BQKBNR b KQkq –

ECO: E24
Opening Name: Nimzo-Indian Defense: Sämisch Variation, Botvinnik Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. f3 d5 5. a3 Bxc3+ 6. bxc3 c5 7. e3 O-O 8. cxd5 Nxd5
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 f2f3 d7d5 a2a3 b4c3 b2c3 c7c5 e2e3 e8g8 c4d5 f6d5
FEN: rnbq1rk1/pp3ppp/4p3/2pn4/3P4/P1P1PP2/6PP/R1BQKBNR w KQ –

ECO: E25
Opening Name: Nimzo-Indian Defense: Sämisch Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. f3 d5 5. a3 Bxc3+ 6. bxc3 c5 7. cxd5
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 f2f3 d7d5 a2a3 b4c3 b2c3 c7c5 c4d5
FEN: rnbqk2r/pp3ppp/4pn2/2pP4/3P4/P1P2P2/4P1PP/R1BQKBNR b KQkq –

ECO: E25
Opening Name: Nimzo-Indian Defense: Sämisch Variation, Keres Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. f3 d5 5. a3 Bxc3+ 6. bxc3 c5 7. cxd5 Nxd5 8. dxc5
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 f2f3 d7d5 a2a3 b4c3 b2c3 c7c5 c4d5 f6d5 d4c5
FEN: rnbqk2r/pp3ppp/4p3/2Pn4/8/P1P2P2/4P1PP/R1BQKBNR b KQkq –

ECO: E25
Opening Name: Nimzo-Indian Defense: Sämisch Variation, Romanovsky Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. f3 d5 5. a3 Bxc3+ 6. bxc3 c5 7. cxd5 Nxd5 8. dxc5 f5
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 f2f3 d7d5 a2a3 b4c3 b2c3 c7c5 c4d5 f6d5 d4c5 f7f5
FEN: rnbqk2r/pp4pp/4p3/2Pn1p2/8/P1P2P2/4P1PP/R1BQKBNR w KQkq –

ECO: E26
Opening Name: Nimzo-Indian Defense: Sämisch Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 c5 6. e3
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 a2a3 b4c3 b2c3 c7c5 e2e3
FEN: rnbqk2r/pp1p1ppp/4pn2/2p5/2PP4/P1P1P3/5PPP/R1BQKBNR b KQkq –

ECO: E26
Opening Name: Nimzo-Indian Defense: Sämisch Variation, O’Kelly Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 c5 6. e3 b6
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 a2a3 b4c3 b2c3 c7c5 e2e3 b7b6
FEN: rnbqk2r/p2p1ppp/1p2pn2/2p5/2PP4/P1P1P3/5PPP/R1BQKBNR w KQkq –

ECO: E27
Opening Name: Nimzo-Indian Defense: Sämisch Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 O-O
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 a2a3 b4c3 b2c3 e8g8
FEN: rnbq1rk1/pppp1ppp/4pn2/8/2PP4/P1P5/4PPPP/R1BQKBNR w KQ –

ECO: E28
Opening Name: Nimzo-Indian Defense: Sämisch Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. a3 Bxc3+ 6. bxc3
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 a2a3 b4c3 b2c3
FEN: rnbq1rk1/pppp1ppp/4pn2/8/2PP4/P1P1P3/5PPP/R1BQKBNR b KQ –

ECO: E29
Opening Name: Nimzo-Indian Defense: Sämisch Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 Nc6 6. a3 Bxc3+ 7. bxc3 O-O
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 c7c5 f1d3 b8c6 a2a3 b4c3 b2c3 e8g8
FEN: r1bq1rk1/pp1p1ppp/2n1pn2/2p5/2PP4/P1PBP3/5PPP/R1BQK1NR w KQ –

ECO: E29
Opening Name: Nimzo-Indian Defense: Sämisch Variation, Capablanca Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 Nc6 6. a3 Bxc3+ 7. bxc3 O-O 8. Ne2 b6 9. e4 Ne8
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 c7c5 f1d3 b8c6 a2a3 b4c3 b2c3 e8g8 g1e2 b7b6 e3e4 f6e8
FEN: r1bqnrk1/p2p1ppp/1pn1p3/2p5/2PPP3/P1PB4/4NPPP/R1BQK2R w KQ –

ECO: E30
Opening Name: Nimzo-Indian Defense: Leningrad Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bg5
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 c1g5
FEN: rnbqk2r/pppp1ppp/4pn2/6B1/1bPP4/2N5/PP2PPPP/R2QKBNR b KQkq –

ECO: E30
Opening Name: Nimzo-Indian Defense: Leningrad Variation, Averbakh Gambit
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bg5 h6 5. Bh4 c5 6. d5 b5
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 c1g5 h7h6 g5h4 c7c5 d4d5 b7b5
FEN: rnbqk2r/p2p1pp1/4pn1p/1ppP4/1bP4B/2N5/PP2PPPP/R2QKBNR w KQkq –

ECO: E31
Opening Name: Nimzo-Indian Defense: Leningrad Variation, Benoni Defense
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bg5 h6 5. Bh4 c5 6. d5 d6
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 c1g5 h7h6 g5h4 c7c5 d4d5 d7d6
FEN: rnbqk2r/pp3pp1/3ppn1p/2pP4/1bP4B/2N5/PP2PPPP/R2QKBNR w KQkq –

ECO: E32
Opening Name: Nimzo-Indian Defense: Classical Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2
FEN: rnbqk2r/pppp1ppp/4pn2/8/1bPP4/2N5/PPQ1PPPP/R1B1KBNR b KQkq –

ECO: E32
Opening Name: Nimzo-Indian Defense: Classical Variation, Keres Defense
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b6
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 e8g8 a2a3 b4c3 c2c3 b7b6
FEN: rnbq1rk1/p1pp1ppp/1p2pn2/8/2PP4/P1Q5/1P2PPPP/R1B1KBNR w KQ –

ECO: E32
Opening Name: Nimzo-Indian Defense: Classical Variation, Vitolins-Adorjan Gambit
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b5
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 e8g8 a2a3 b4c3 c2c3 b7b5
FEN: rnbq1rk1/p1pp1ppp/4pn2/1p6/2PP4/P1Q5/1P2PPPP/R1B1KBNR w KQ –

ECO: E33
Opening Name: Nimzo-Indian Defense: Classical Variation, Milner-Barry Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 Nc6 5. Nf3 d6
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 b8c6 g1f3 d7d6
FEN: r1bqk2r/ppp2ppp/2nppn2/8/1bPP4/2N2N2/PPQ1PPPP/R1B1KB1R w KQkq –

ECO: E33
Opening Name: Nimzo-Indian Defense: Classical Variation, Zurich Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 Nc6
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 b8c6
FEN: r1bqk2r/pppp1ppp/2n1pn2/8/1bPP4/2N5/PPQ1PPPP/R1B1KBNR w KQkq –

ECO: E34
Opening Name: Nimzo-Indian Defense: Classical Variation, Belyavsky Gambit
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 Qf5 7. Qd1 e5
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 d7d5 c4d5 d8d5 g1f3 d5f5 c2d1 e6e5
FEN: rnb1k2r/ppp2ppp/5n2/4pq2/1b1P4/2N2N2/PP2PPPP/R1BQKB1R w KQkq –

ECO: E34
Opening Name: Nimzo-Indian Defense: Classical Variation, Noa Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 d7d5
FEN: rnbqk2r/ppp2ppp/4pn2/3p4/1bPP4/2N5/PPQ1PPPP/R1B1KBNR w KQkq –

ECO: E35
Opening Name: Nimzo-Indian Defense: Classical Variation, Noa Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 exd5
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 d7d5 c4d5 e6d5
FEN: rnbqk2r/ppp2ppp/5n2/3p4/1b1P4/2N5/PPQ1PPPP/R1B1KBNR w KQkq –

ECO: E36
Opening Name: Nimzo-Indian Defense: Classical Variation, Noa Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. a3
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 d7d5 a2a3
FEN: rnbqk2r/ppp2ppp/4pn2/3p4/1bPP4/P1N5/1PQ1PPPP/R1B1KBNR b KQkq –

ECO: E36
Opening Name: Nimzo-Indian Defense: Classical Variation, Noa Variation, Botvinnik Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. a3 Bxc3+ 6. Qxc3 Nc6
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 d7d5 a2a3 b4c3 c2c3 b8c6
FEN: r1bqk2r/ppp2ppp/2n1pn2/3p4/2PP4/P1Q5/1P2PPPP/R1B1KBNR w KQkq –

ECO: E36
Opening Name: Nimzo-Indian Defense: Classical Variation, Noa Variation, Main Line
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. a3 Bxc3+ 6. Qxc3 Ne4
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 d7d5 a2a3 b4c3 c2c3 f6e4
FEN: rnbqk2r/ppp2ppp/4p3/3p4/2PPn3/P1Q5/1P2PPPP/R1B1KBNR w KQkq –

ECO: E37
Opening Name: Nimzo-Indian Defense: Classical Variation, Noa Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. a3 Bxc3+ 6. Qxc3 Ne4 7. Qc2
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 d7d5 a2a3 b4c3 c2c3 f6e4 c3c2
FEN: rnbqk2r/ppp2ppp/4p3/3p4/2PPn3/P7/1PQ1PPPP/R1B1KBNR b KQkq –

ECO: E37
Opening Name: Nimzo-Indian Defense: Classical Variation, Noa Variation, San Remo Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. a3 Bxc3+ 6. Qxc3 Ne4 7. Qc2 Nc6 8. e3 e5
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 d7d5 a2a3 b4c3 c2c3 f6e4 c3c2 b8c6 e2e3 e6e5
FEN: r1bqk2r/ppp2ppp/2n5/3pp3/2PPn3/P3P3/1PQ2PPP/R1B1KBNR w KQkq –

ECO: E38
Opening Name: Nimzo-Indian Defense: Classical Variation, Berlin Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 c7c5
FEN: rnbqk2r/pp1p1ppp/4pn2/2p5/1bPP4/2N5/PPQ1PPPP/R1B1KBNR w KQkq –

ECO: E38
Opening Name: Nimzo-Indian Defense: Classical Variation, Berlin Variation, Steiner Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5 5. dxc5 Bxc3+
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 c7c5 d4c5 b4c3
FEN: rnbqk2r/pp1p1ppp/4pn2/2P5/2P5/2b5/PPQ1PPPP/R1B1KBNR w KQkq –

ECO: E39
Opening Name: Nimzo-Indian Defense: Classical Variation, Berlin Variation, Macieja System
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5 5. dxc5 O-O 6. a3 Bxc5 7. Nf3 b6 8. Bf4
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 c7c5 d4c5 e8g8 a2a3 b4c5 g1f3 b7b6 c1f4
FEN: rnbq1rk1/p2p1ppp/1p2pn2/2b5/2P2B2/P1N2N2/1PQ1PPPP/R3KB1R b KQ –

ECO: E39
Opening Name: Nimzo-Indian Defense: Classical Variation, Berlin Variation, Pirc Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5 5. dxc5 O-O
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 c7c5 d4c5 e8g8
FEN: rnbq1rk1/pp1p1ppp/4pn2/2P5/1bP5/2N5/PPQ1PPPP/R1B1KBNR w KQ –

ECO: E40
Opening Name: Nimzo-Indian Defense: Normal Line
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3
FEN: rnbqk2r/pppp1ppp/4pn2/8/1bPP4/2N1P3/PP3PPP/R1BQKBNR b KQkq –

ECO: E40
Opening Name: Nimzo-Indian Defense: Normal Variation, Taimanov Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 Nc6
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 b8c6
FEN: r1bqk2r/pppp1ppp/2n1pn2/8/1bPP4/2N1P3/PP3PPP/R1BQKBNR w KQkq –

ECO: E41
Opening Name: Nimzo-Indian Defense: Hübner Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 c7c5
FEN: rnbqk2r/pp1p1ppp/4pn2/2p5/1bPP4/2N1P3/PP3PPP/R1BQKBNR w KQkq –

ECO: E41
Opening Name: Nimzo-Indian Defense: Hübner Variation, Main Line
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 Nc6 6. Nf3 Bxc3+ 7. bxc3 d6
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 c7c5 f1d3 b8c6 g1f3 b4c3 b2c3 d7d6
FEN: r1bqk2r/pp3ppp/2nppn2/2p5/2PP4/2PBPN2/P4PPP/R1BQK2R w KQkq –

ECO: E41
Opening Name: Nimzo-Indian Defense: Normal Variation, Hübner Deferred
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Nf3 O-O
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 c7c5 g1f3 e8g8
FEN: rnbq1rk1/pp1p1ppp/4pn2/2p5/1bPP4/2N1PN2/PP3PPP/R1BQKB1R w KQ –

ECO: E42
Opening Name: Nimzo-Indian Defense: Hübner Variation, Rubinstein Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Ne2
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 c7c5 g1e2
FEN: rnbqk2r/pp1p1ppp/4pn2/2p5/1bPP4/2N1P3/PP2NPPP/R1BQKB1R b KQkq –

ECO: E42
Opening Name: Nimzo-Indian Defense: Hübner Variation, Rubinstein Variation, Main Line
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Ne2 cxd4 6. exd4 O-O 7. a3
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 c7c5 g1e2 c5d4 e3d4 e8g8 a2a3
FEN: rnbq1rk1/pp1p1ppp/4pn2/8/1bPP4/P1N5/1P2NPPP/R1BQKB1R b KQ –

ECO: E42
Opening Name: Nimzo-Indian Defense: Hübner Variation, Rubinstein Variation, Sherbakov Attack
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Ne2 cxd4 6. exd4 O-O 7. c5
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 c7c5 g1e2 c5d4 e3d4 e8g8 c4c5
FEN: rnbq1rk1/pp1p1ppp/4pn2/2P5/1b1P4/2N5/PP2NPPP/R1BQKB1R b KQ –

ECO: E43
Opening Name: Nimzo-Indian Defense: St. Petersburg Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 b7b6
FEN: rnbqk2r/p1pp1ppp/1p2pn2/8/1bPP4/2N1P3/PP3PPP/R1BQKBNR w KQkq –

ECO: E43
Opening Name: Nimzo-Indian Defense: St. Petersburg Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Bd3 Bb7 6. Nf3
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 b7b6 f1d3 c8b7 g1f3
FEN: rn1qk2r/pbpp1ppp/1p2pn2/8/1bPP4/2NBPN2/PP3PPP/R1BQK2R b KQkq –

ECO: E43
Opening Name: Nimzo-Indian Defense: St. Petersburg Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Bd3 Bb7 6. Nf3 O-O
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 b7b6 f1d3 c8b7 g1f3 e8g8
FEN: rn1q1rk1/pbpp1ppp/1p2pn2/8/1bPP4/2NBPN2/PP3PPP/R1BQK2R w KQ –

ECO: E43
Opening Name: Nimzo-Indian Defense: St. Petersburg Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Bd3 Bb7 6. Nf3 O-O 7. O-O
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 b7b6 f1d3 c8b7 g1f3 e8g8 e1g1
FEN: rn1q1rk1/pbpp1ppp/1p2pn2/8/1bPP4/2NBPN2/PP3PPP/R1BQ1RK1 b – –

ECO: E43
Opening Name: Nimzo-Indian Defense: St. Petersburg Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Bd3 Bb7 6. Nf3 O-O 7. O-O c5
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 b7b6 f1d3 c8b7 g1f3 e8g8 e1g1 c7c5
FEN: rn1q1rk1/pb1p1ppp/1p2pn2/2p5/1bPP4/2NBPN2/PP3PPP/R1BQ1RK1 w – –

ECO: E43
Opening Name: Nimzo-Indian Defense: St. Petersburg Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Bd3 Bb7 6. Nf3 O-O 7. O-O c5 8. Na4 cxd4 9. a3 Be7
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 b7b6 f1d3 c8b7 g1f3 e8g8 e1g1 c7c5 c3a4 c5d4 a2a3 b4e7
FEN: rn1q1rk1/pb1pbppp/1p2pn2/8/N1Pp4/P2BPN2/1P3PPP/R1BQ1RK1 w – –

ECO: E43
Opening Name: Nimzo-Indian Defense: St. Petersburg Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 Ne4 5. Qc2 f5 6. Nf3 b6 7. Bd3 Bb7
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 f6e4 d1c2 f7f5 g1f3 b7b6 f1d3 c8b7
FEN: rn1qk2r/pbpp2pp/1p2p3/5p2/1bPPn3/2NBPN2/PPQ2PPP/R1B1K2R w KQkq –

ECO: E43
Opening Name: Nimzo-Indian Defense: St. Petersburg Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 c5 6. Nf3 b6 7. O-O Bb7 8. Na4 Qe7
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 f1d3 c7c5 g1f3 b7b6 e1g1 c8b7 c3a4 d8e7
FEN: rn3rk1/pb1pqppp/1p2pn2/2p5/NbPP4/3BPN2/PP3PPP/R1BQ1RK1 w – –

ECO: E43
Opening Name: Nimzo-Indian Defense: St. Petersburg Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 Bxc3+ 5. bxc3 b6 6. e3 Bb7 7. Bd3 O-O 8. O-O
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 g1f3 b4c3 b2c3 b7b6 e2e3 c8b7 f1d3 e8g8 e1g1
FEN: rn1q1rk1/pbpp1ppp/1p2pn2/8/2PP4/2PBPN2/P4PPP/R1BQ1RK1 b – –

ECO: E43
Opening Name: Nimzo-Indian Defense: St. Petersburg Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 b6 5. e3 Ne4 6. Qc2
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 g1f3 b7b6 e2e3 f6e4 d1c2
FEN: rnbqk2r/p1pp1ppp/1p2p3/8/1bPPn3/2N1PN2/PPQ2PPP/R1B1KB1R b KQkq –

ECO: E43
Opening Name: Nimzo-Indian Defense: St. Petersburg Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 b6 5. e3 Ne4 6. Qc2 Bb7 7. Bd3 Bxc3+ 8. bxc3 f5 9. O-O
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 g1f3 b7b6 e2e3 f6e4 d1c2 c8b7 f1d3 b4c3 b2c3 f7f5 e1g1
FEN: rn1qk2r/pbpp2pp/1p2p3/5p2/2PPn3/2PBPN2/P1Q2PPP/R1B2RK1 b kq –

ECO: E43
Opening Name: Nimzo-Indian Defense: St. Petersburg Variation, with Ne4
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Bd3 Bb7 6. Nf3 Ne4
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 b7b6 f1d3 c8b7 g1f3 f6e4
FEN: rn1qk2r/pbpp1ppp/1p2p3/8/1bPPn3/2NBPN2/PP3PPP/R1BQK2R w KQkq –

ECO: E44
Opening Name: Nimzo-Indian Defense: Fischer Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Ne2
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 b7b6 g1e2
FEN: rnbqk2r/p1pp1ppp/1p2pn2/8/1bPP4/2N1P3/PP2NPPP/R1BQKB1R b KQkq –

ECO: E45
Opening Name: Nimzo-Indian Defense: Normal Variation, Bronstein (Byrne) Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Ne2 Ba6
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 b7b6 g1e2 c8a6
FEN: rn1qk2r/p1pp1ppp/bp2pn2/8/1bPP4/2N1P3/PP2NPPP/R1BQKB1R w KQkq –

ECO: E46
Opening Name: Nimzo-Indian Defense: Normal Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8
FEN: rnbq1rk1/pppp1ppp/4pn2/8/1bPP4/2N1P3/PP3PPP/R1BQKBNR w KQ –

ECO: E46
Opening Name: Nimzo-Indian Defense: Reshevsky Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Ne2
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 g1e2
FEN: rnbq1rk1/pppp1ppp/4pn2/8/1bPP4/2N1P3/PP2NPPP/R1BQKB1R b KQ –

ECO: E46
Opening Name: Nimzo-Indian Defense: Simagin Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Ne2 d5 6. a3 Bd6
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 g1e2 d7d5 a2a3 b4d6
FEN: rnbq1rk1/ppp2ppp/3bpn2/3p4/2PP4/P1N1P3/1P2NPPP/R1BQKB1R w KQ –

ECO: E47
Opening Name: Nimzo-Indian Defense: Normal Variation, Bishop Attack
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 f1d3
FEN: rnbq1rk1/pppp1ppp/4pn2/8/1bPP4/2NBP3/PP3PPP/R1BQK1NR b KQ –

ECO: E48
Opening Name: Nimzo-Indian Defense: Normal Variation, Bishop Attack, Classical Defense
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 f1d3 d7d5
FEN: rnbq1rk1/ppp2ppp/4pn2/3p4/1bPP4/2NBP3/PP3PPP/R1BQK1NR w KQ –

ECO: E48
Opening Name: Nimzo-Indian Defense: Ragozin Defense
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 Nc6 7. O-O
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 f1d3 d7d5 g1f3 b8c6 e1g1
FEN: r1bq1rk1/ppp2ppp/2n1pn2/3p4/1bPP4/2NBPN2/PP3PPP/R1BQ1RK1 b – –

ECO: E49
Opening Name: Nimzo-Indian Defense: Normal Variation, Botvinnik System
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. a3 Bxc3+ 7. bxc3
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 f1d3 d7d5 a2a3 b4c3 b2c3
FEN: rnbq1rk1/ppp2ppp/4pn2/3p4/2PP4/P1PBP3/5PPP/R1BQK1NR b KQ –

ECO: E50
Opening Name: Nimzo-Indian Defense
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 g1f3
FEN: rnbq1rk1/pppp1ppp/4pn2/8/1bPP4/2N1PN2/PP3PPP/R1BQKB1R b KQ –

ECO: E51
Opening Name: Nimzo-Indian Defense: Normal Variation, Ragozin Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 g1f3 d7d5
FEN: rnbq1rk1/ppp2ppp/4pn2/3p4/1bPP4/2N1PN2/PP3PPP/R1BQKB1R w KQ –

ECO: E51
Opening Name: Nimzo-Indian Defense: Normal Variation, Sämisch Deferred
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 6. a3
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 g1f3 d7d5 a2a3
FEN: rnbq1rk1/ppp2ppp/4pn2/3p4/1bPP4/P1N1PN2/1P3PPP/R1BQKB1R b KQ –

ECO: E51
Opening Name: Nimzo-Indian Defense: Ragozin Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 Nc6 7. O-O dxc4
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 f1d3 d7d5 g1f3 b8c6 e1g1 d5c4
FEN: r1bq1rk1/ppp2ppp/2n1pn2/8/1bpP4/2NBPN2/PP3PPP/R1BQ1RK1 w – –

ECO: E52
Opening Name: Nimzo-Indian Defense: Normal Variation, Schlechter Defense
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 b6
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 f1d3 d7d5 g1f3 b7b6
FEN: rnbq1rk1/p1p2ppp/1p2pn2/3p4/1bPP4/2NBPN2/PP3PPP/R1BQK2R w KQ –

ECO: E52
Opening Name: Nimzo-Indian Defense: Normal Variation, Schlechter Defense
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Bd3 Bb7 6. Nf3 O-O 7. O-O d5
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 b7b6 f1d3 c8b7 g1f3 e8g8 e1g1 d7d5
FEN: rn1q1rk1/pbp2ppp/1p2pn2/3p4/1bPP4/2NBPN2/PP3PPP/R1BQ1RK1 w – –

ECO: E53
Opening Name: Nimzo-Indian Defense: Normal Variation, Gligoric System
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 f1d3 d7d5 g1f3 c7c5
FEN: rnbq1rk1/pp3ppp/4pn2/2pp4/1bPP4/2NBPN2/PP3PPP/R1BQK2R w KQ –

ECO: E53
Opening Name: Nimzo-Indian Defense: Normal Variation, Gligoric System
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O Nbd7
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 f1d3 d7d5 g1f3 c7c5 e1g1 b8d7
FEN: r1bq1rk1/pp1n1ppp/4pn2/2pp4/1bPP4/2NBPN2/PP3PPP/R1BQ1RK1 w – –

ECO: E53
Opening Name: Nimzo-Indian Defense: Normal Variation, Gligoric System, Keres Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O b6
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 f1d3 d7d5 g1f3 c7c5 e1g1 b7b6
FEN: rnbq1rk1/p4ppp/1p2pn2/2pp4/1bPP4/2NBPN2/PP3PPP/R1BQ1RK1 w – –

ECO: E54
Opening Name: Nimzo-Indian Defense: Normal Variation, Gligoric System, Exchange Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 f1d3 d7d5 g1f3 c7c5 e1g1 d5c4 d3c4
FEN: rnbq1rk1/pp3ppp/4pn2/2p5/1bBP4/2N1PN2/PP3PPP/R1BQ1RK1 b – –

ECO: E54
Opening Name: Nimzo-Indian Defense: Normal Variation, Gligoric System, Smyslov Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 Qe7
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 f1d3 d7d5 g1f3 c7c5 e1g1 d5c4 d3c4 d8e7
FEN: rnb2rk1/pp2qppp/4pn2/2p5/1bBP4/2N1PN2/PP3PPP/R1BQ1RK1 w – –

ECO: E55
Opening Name: Nimzo-Indian Defense: Normal Variation, Gligoric System, Bronstein Variation
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 Nbd7
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 f1d3 d7d5 g1f3 c7c5 e1g1 d5c4 d3c4 b8d7
FEN: r1bq1rk1/pp1n1ppp/4pn2/2p5/1bBP4/2N1PN2/PP3PPP/R1BQ1RK1 w – –

ECO: E56
Opening Name: Nimzo-Indian Defense: Normal Variation, Gligoric System, Bernstein Defense
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O Nc6
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 f1d3 d7d5 g1f3 c7c5 e1g1 b8c6
FEN: r1bq1rk1/pp3ppp/2n1pn2/2pp4/1bPP4/2NBPN2/PP3PPP/R1BQ1RK1 w – –

ECO: E58
Opening Name: Nimzo-Indian Defense: Normal Variation, Bernstein Defense, Exchange Line
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O Nc6 8. a3 Bxc3 9. bxc3
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 f1d3 d7d5 g1f3 c7c5 e1g1 b8c6 a2a3 b4c3 b2c3
FEN: r1bq1rk1/pp3ppp/2n1pn2/2pp4/2PP4/P1PBPN2/5PPP/R1BQ1RK1 b – –

ECO: E59
Opening Name: Nimzo-Indian Defense: Normal Variation, Bernstein Defense
SAN: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O Nc6 8. a3 Bxc3 9. bxc3 dxc4 10. Bxc4
UCI: d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 f1d3 d7d5 g1f3 c7c5 e1g1 b8c6 a2a3 b4c3 b2c3 d5c4 d3c4
FEN: r1bq1rk1/pp3ppp/2n1pn2/2p5/2BP4/P1P1PN2/5PPP/R1BQ1RK1 b – –

ECO: E60
Opening Name: Grünfeld Defense: Counterthrust Variation
SAN: 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 d5
UCI: d2d4 g8f6 c2c4 g7g6 g2g3 f8g7 f1g2 d7d5
FEN: rnbqk2r/ppp1ppbp/5np1/3p4/2PP4/6P1/PP2PPBP/RNBQK1NR w KQkq –

ECO: E60
Opening Name: Indian Defense: Anti-Grünfeld, Adorjan Gambit
SAN: 1. d4 Nf6 2. c4 g6 3. d5 b5
UCI: d2d4 g8f6 c2c4 g7g6 d4d5 b7b5
FEN: rnbqkb1r/p1pppp1p/5np1/1p1P4/2P5/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: E60
Opening Name: Indian Defense: Anti-Grünfeld, Advance Variation
SAN: 1. d4 Nf6 2. c4 g6 3. d5
UCI: d2d4 g8f6 c2c4 g7g6 d4d5
FEN: rnbqkb1r/pppppp1p/5np1/3P4/2P5/8/PP2PPPP/RNBQKBNR b KQkq –

ECO: E60
Opening Name: Indian Defense: Anti-Grünfeld, Alekhine Variation
SAN: 1. d4 Nf6 2. c4 g6 3. f3
UCI: d2d4 g8f6 c2c4 g7g6 f2f3
FEN: rnbqkb1r/pppppp1p/5np1/8/2PP4/5P2/PP2P1PP/RNBQKBNR b KQkq –

ECO: E60
Opening Name: Indian Defense: Anti-Grünfeld, Alekhine Variation, Leko Gambit
SAN: 1. d4 Nf6 2. c4 g6 3. f3 e5
UCI: d2d4 g8f6 c2c4 g7g6 f2f3 e7e5
FEN: rnbqkb1r/pppp1p1p/5np1/4p3/2PP4/5P2/PP2P1PP/RNBQKBNR w KQkq –

ECO: E60
Opening Name: Indian Defense: Anti-Grünfeld, Basman-Williams Attack
SAN: 1. d4 Nf6 2. c4 g6 3. h4
UCI: d2d4 g8f6 c2c4 g7g6 h2h4
FEN: rnbqkb1r/pppppp1p/5np1/8/2PP3P/8/PP2PPP1/RNBQKBNR b KQkq –

ECO: E60
Opening Name: Indian Defense: King’s Indian Variation, Fianchetto Variation
SAN: 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2
UCI: d2d4 g8f6 c2c4 g7g6 g2g3 f8g7 f1g2
FEN: rnbqk2r/ppppppbp/5np1/8/2PP4/6P1/PP2PPBP/RNBQK1NR b KQkq –

ECO: E60
Opening Name: Indian Defense: West Indian Defense
SAN: 1. d4 Nf6 2. c4 g6
UCI: d2d4 g8f6 c2c4 g7g6
FEN: rnbqkb1r/pppppp1p/5np1/8/2PP4/8/PP2PPPP/RNBQKBNR w KQkq –

ECO: E60
Opening Name: King’s Indian Defense: Fianchetto Variation, Immediate Fianchetto
SAN: 1. d4 Nf6 2. c4 g6 3. g3
UCI: d2d4 g8f6 c2c4 g7g6 g2g3
FEN: rnbqkb1r/pppppp1p/5np1/8/2PP4/6P1/PP2PP1P/RNBQKBNR b KQkq –

ECO: E60
Opening Name: King’s Indian Defense: Normal Variation, King’s Knight Variation
SAN: 1. d4 Nf6 2. Nf3 g6 3. c4
UCI: d2d4 g8f6 g1f3 g7g6 c2c4
FEN: rnbqkb1r/pppppp1p/5np1/8/2PP4/5N2/PP2PPPP/RNBQKB1R b KQkq –

ECO: E60
Opening Name: King’s Indian Defense: Santasiere Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. b4
UCI: d2d4 g8f6 c2c4 g7g6 g1f3 f8g7 b2b4
FEN: rnbqk2r/ppppppbp/5np1/8/1PPP4/5N2/P3PPPP/RNBQKB1R b KQkq –

ECO: E60
Opening Name: King’s Indian Defense: Semi-Classical Variation, Benoni Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 O-O 5. e3 d6 6. Be2 c6
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 g1f3 e8g8 e2e3 d7d6 f1e2 c7c6
FEN: rnbq1rk1/pp2ppbp/2pp1np1/8/2PP4/2N1PN2/PP2BPPP/R1BQK2R w KQ –

ECO: E60
Opening Name: King’s Indian Defense: Semi-Classical Variation, Hollywood Variation
SAN: 1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 O-O 5. e3 d6 6. Be2 Nc6
UCI: d2d4 g8f6 g1f3 g7g6 c2c4 f8g7 b1c3 e8g8 e2e3 d7d6 f1e2 b8c6
FEN: r1bq1rk1/ppp1ppbp/2np1np1/8/2PP4/2N1PN2/PP2BPPP/R1BQK2R w KQ –

ECO: E60
Opening Name: Queen’s Pawn, Mengarini Attack
SAN: 1. d4 Nf6 2. c4 g6 3. Qc2
UCI: d2d4 g8f6 c2c4 g7g6 d1c2
FEN: rnbqkb1r/pppppp1p/5np1/8/2PP4/8/PPQ1PPPP/RNB1KBNR b KQkq –

ECO: E61
Opening Name: King’s Indian Defense
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3
UCI: d2d4 g8f6 c2c4 g7g6 b1c3
FEN: rnbqkb1r/pppppp1p/5np1/8/2PP4/2N5/PP2PPPP/R1BQKBNR b KQkq –

ECO: E61
Opening Name: King’s Indian Defense: Fianchetto Variation, Benjamin Defense
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 O-O 6. Bg2 c6 7. O-O Qb6
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 g1f3 d7d6 g2g3 e8g8 f1g2 c7c6 e1g1 d8b6
FEN: rnb2rk1/pp2ppbp/1qpp1np1/8/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w – –

ECO: E61
Opening Name: King’s Indian Defense: Semi-Classical Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 O-O 5. e3 d6 6. Be2
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 g1f3 e8g8 e2e3 d7d6 f1e2
FEN: rnbq1rk1/ppp1ppbp/3p1np1/8/2PP4/2N1PN2/PP2BPPP/R1BQK2R b KQ –

ECO: E61
Opening Name: King’s Indian Defense: Semi-Classical Variation, Exchange Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 O-O 5. e3 d6 6. Be2 Nbd7 7. O-O e5 8. dxe5 dxe5
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 g1f3 e8g8 e2e3 d7d6 f1e2 b8d7 e1g1 e7e5 d4e5 d6e5
FEN: r1bq1rk1/pppn1pbp/5np1/4p3/2P5/2N1PN2/PP2BPPP/R1BQ1RK1 w – –

ECO: E61
Opening Name: King’s Indian Defense: Semi-Classical Variation, Queenside Storm Line
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 O-O 5. e3 d6 6. Be2 Nbd7 7. O-O e5 8. b4
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 g1f3 e8g8 e2e3 d7d6 f1e2 b8d7 e1g1 e7e5 b2b4
FEN: r1bq1rk1/pppn1pbp/3p1np1/4p3/1PPP4/2N1PN2/P3BPPP/R1BQ1RK1 b – –

ECO: E61
Opening Name: King’s Indian Defense: Smyslov Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. Bg5
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 g1f3 d7d6 c1g5
FEN: rnbqk2r/ppp1ppbp/3p1np1/6B1/2PP4/2N2N2/PP2PPPP/R2QKB1R b KQkq –

ECO: E62
Opening Name: King’s Indian Defense: Fianchetto Variation, Carlsbad Variation
SAN: 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 Nc6
UCI: d2d4 g8f6 c2c4 g7g6 g2g3 f8g7 f1g2 e8g8 b1c3 d7d6 g1f3 b8c6
FEN: r1bq1rk1/ppp1ppbp/2np1np1/8/2PP4/2N2NP1/PP2PPBP/R1BQK2R w KQ –

ECO: E62
Opening Name: King’s Indian Defense: Fianchetto Variation, Delayed Fianchetto
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 g1f3 d7d6 g2g3
FEN: rnbqk2r/ppp1ppbp/3p1np1/8/2PP4/2N2NP1/PP2PP1P/R1BQKB1R b KQkq –

ECO: E62
Opening Name: King’s Indian Defense: Fianchetto Variation, Kavalek Defense
SAN: 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O c6 7. Nc3 Qa5
UCI: d2d4 g8f6 c2c4 g7g6 g1f3 f8g7 g2g3 e8g8 f1g2 d7d6 e1g1 c7c6 b1c3 d8a5
FEN: rnb2rk1/pp2ppbp/2pp1np1/q7/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w – –

ECO: E62
Opening Name: King’s Indian Defense: Fianchetto Variation, Larsen Defense
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 O-O 6. Bg2 c6 7. O-O Bf5
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 g1f3 d7d6 g2g3 e8g8 f1g2 c7c6 e1g1 c8f5
FEN: rn1q1rk1/pp2ppbp/2pp1np1/5b2/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w – –

ECO: E62
Opening Name: King’s Indian Defense: Fianchetto Variation, Lesser Simagin (Spassky)
SAN: 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 Nc6 7. O-O Bf5
UCI: d2d4 g8f6 c2c4 g7g6 g2g3 f8g7 f1g2 e8g8 b1c3 d7d6 g1f3 b8c6 e1g1 c8f5
FEN: r2q1rk1/ppp1ppbp/2np1np1/5b2/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w – –

ECO: E62
Opening Name: King’s Indian Defense: Fianchetto Variation, Simagin Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 O-O 6. Bg2 Nc6 7. O-O Bg4
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 g1f3 d7d6 g2g3 e8g8 f1g2 b8c6 e1g1 c8g4
FEN: r2q1rk1/ppp1ppbp/2np1np1/8/2PP2b1/2N2NP1/PP2PPBP/R1BQ1RK1 w – –

ECO: E62
Opening Name: King’s Indian Defense: Fianchetto Variation, Uhlmann-Szabo System
SAN: 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nc6 7. Nc3 e5
UCI: d2d4 g8f6 c2c4 g7g6 g1f3 f8g7 g2g3 e8g8 f1g2 d7d6 e1g1 b8c6 b1c3 e7e5
FEN: r1bq1rk1/ppp2pbp/2np1np1/4p3/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w – –

ECO: E63
Opening Name: King’s Indian Defense: Fianchetto Variation, Panno Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nc6 7. Nc3 a6
UCI: d2d4 g8f6 c2c4 g7g6 g1f3 f8g7 g2g3 e8g8 f1g2 d7d6 e1g1 b8c6 b1c3 a7a6
FEN: r1bq1rk1/1pp1ppbp/p1np1np1/8/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w – –

ECO: E63
Opening Name: King’s Indian Defense: Fianchetto Variation, Panno Variation, Blockade Line
SAN: 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nc6 7. Nc3 a6 8. d5 Na5 9. Nd2 c5 10. Qc2 e5
UCI: d2d4 g8f6 c2c4 g7g6 g1f3 f8g7 g2g3 e8g8 f1g2 d7d6 e1g1 b8c6 b1c3 a7a6 d4d5 c6a5 f3d2 c7c5 d1c2 e7e5
FEN: r1bq1rk1/1p3pbp/p2p1np1/n1pPp3/2P5/2N3P1/PPQNPPBP/R1B2RK1 w – e6

ECO: E63
Opening Name: King’s Indian Defense: Fianchetto Variation, Panno Variation, Donner Line
SAN: 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nc6 7. Nc3 a6 8. d5 Na5 9. Nd2 c5 10. Qc2 Rb8 11. b3 b5 12. Bb2 bxc4 13. bxc4 Bh6
UCI: d2d4 g8f6 c2c4 g7g6 g1f3 f8g7 g2g3 e8g8 f1g2 d7d6 e1g1 b8c6 b1c3 a7a6 d4d5 c6a5 f3d2 c7c5 d1c2 a8b8 b2b3 b7b5 c1b2 b5c4 b3c4 g7h6
FEN: 1rbq1rk1/4pp1p/p2p1npb/n1pP4/2P5/2N3P1/PBQNPPBP/R4RK1 w – –

ECO: E63
Opening Name: King’s Indian Defense: Fianchetto Variation, Panno Variation, Korchnoi Line
SAN: 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nc6 7. Nc3 a6 8. h3 Rb8 9. Be3 b5 10. Nd2
UCI: d2d4 g8f6 c2c4 g7g6 g1f3 f8g7 g2g3 e8g8 f1g2 d7d6 e1g1 b8c6 b1c3 a7a6 h2h3 a8b8 c1e3 b7b5 f3d2
FEN: 1rbq1rk1/2p1ppbp/p1np1np1/1p6/2PP4/2N1B1PP/PP1NPPB1/R2Q1RK1 b – –

ECO: E64
Opening Name: King’s Indian Defense: Fianchetto Variation, Double Fianchetto Attack
SAN: 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 d6 5. Bg2 O-O 6. O-O Nbd7 7. Nc3 e5 8. b3
UCI: d2d4 g8f6 c2c4 g7g6 g1f3 f8g7 g2g3 d7d6 f1g2 e8g8 e1g1 b8d7 b1c3 e7e5 b2b3
FEN: r1bq1rk1/pppn1pbp/3p1np1/4p3/2PP4/1PN2NP1/P3PPBP/R1BQ1RK1 b – –

ECO: E64
Opening Name: King’s Indian Defense: Fianchetto Variation, Hungarian Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 d6 5. Bg2 O-O 6. O-O Nbd7 7. Nc3 a6
UCI: d2d4 g8f6 c2c4 g7g6 g1f3 f8g7 g2g3 d7d6 f1g2 e8g8 e1g1 b8d7 b1c3 a7a6
FEN: r1bq1rk1/1ppnppbp/p2p1np1/8/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w – –

ECO: E64
Opening Name: King’s Indian Defense: Fianchetto Variation, Pterodactyl Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 c5 5. Bg2 Qa5+
UCI: d2d4 g8f6 c2c4 g7g6 g1f3 f8g7 g2g3 c7c5 f1g2 d8a5
FEN: rnb1k2r/pp1pppbp/5np1/q1p5/2PP4/5NP1/PP2PPBP/RNBQK2R w KQkq –

ECO: E64
Opening Name: King’s Indian Defense: Fianchetto Variation, Yugoslav System
SAN: 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 d6 5. Bg2 O-O 6. O-O c5
UCI: d2d4 g8f6 c2c4 g7g6 g1f3 f8g7 g2g3 d7d6 f1g2 e8g8 e1g1 c7c5
FEN: rnbq1rk1/pp2ppbp/3p1np1/2p5/2PP4/5NP1/PP2PPBP/RNBQ1RK1 w – –

ECO: E64
Opening Name: King’s Indian Defense: Fianchetto Variation, Yugoslav Variation, Rare Line
SAN: 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 c5
UCI: d2d4 g8f6 c2c4 g7g6 g2g3 f8g7 f1g2 e8g8 b1c3 d7d6 g1f3 c7c5
FEN: rnbq1rk1/pp2ppbp/3p1np1/2p5/2PP4/2N2NP1/PP2PPBP/R1BQK2R w KQ –

ECO: E65
Opening Name: King’s Indian Defense: Fianchetto Variation, Yugoslav Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O c5 7. Nc3
UCI: d2d4 g8f6 c2c4 g7g6 g1f3 f8g7 g2g3 e8g8 f1g2 d7d6 e1g1 c7c5 b1c3
FEN: rnbq1rk1/pp2ppbp/3p1np1/2p5/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 b – –

ECO: E65
Opening Name: King’s Indian Defense: Fianchetto Variation, Yugoslav Variation, Exchange Line
SAN: 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O c5 7. Nc3 Nc6 8. dxc5 dxc5
UCI: d2d4 g8f6 c2c4 g7g6 g1f3 f8g7 g2g3 e8g8 f1g2 d7d6 e1g1 c7c5 b1c3 b8c6 d4c5 d6c5
FEN: r1bq1rk1/pp2ppbp/2n2np1/2p5/2P5/2N2NP1/PP2PPBP/R1BQ1RK1 w – –

ECO: E66
Opening Name: King’s Indian Defense: Fianchetto Variation, Yugoslav Variation, Advance Line
SAN: 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O c5 7. Nc3 Nc6 8. d5
UCI: d2d4 g8f6 c2c4 g7g6 g1f3 f8g7 g2g3 e8g8 f1g2 d7d6 e1g1 c7c5 b1c3 b8c6 d4d5
FEN: r1bq1rk1/pp2ppbp/2np1np1/2pP4/2P5/2N2NP1/PP2PPBP/R1BQ1RK1 b – –

ECO: E67
Opening Name: King’s Indian Defense: Fianchetto Variation, Classical Fianchetto
SAN: 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nbd7 7. Nc3 e5
UCI: d2d4 g8f6 c2c4 g7g6 g1f3 f8g7 g2g3 e8g8 f1g2 d7d6 e1g1 b8d7 b1c3 e7e5
FEN: r1bq1rk1/pppn1pbp/3p1np1/4p3/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w – –

ECO: E67
Opening Name: King’s Indian Defense: Fianchetto Variation, Debrecen Defense
SAN: 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 Nbd7
UCI: d2d4 g8f6 c2c4 g7g6 g2g3 f8g7 f1g2 e8g8 b1c3 d7d6 g1f3 b8d7
FEN: r1bq1rk1/pppnppbp/3p1np1/8/2PP4/2N2NP1/PP2PPBP/R1BQK2R w KQ –

ECO: E68
Opening Name: King’s Indian Defense: Fianchetto Variation, Classical Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nbd7 7. Nc3 e5 8. e4
UCI: d2d4 g8f6 c2c4 g7g6 g1f3 f8g7 g2g3 e8g8 f1g2 d7d6 e1g1 b8d7 b1c3 e7e5 e2e4
FEN: r1bq1rk1/pppn1pbp/3p1np1/4p3/2PPP3/2N2NP1/PP3PBP/R1BQ1RK1 b – –

ECO: E68
Opening Name: King’s Indian Defense: Fianchetto Variation, Long Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 O-O 6. Bg2 Nbd7 7. O-O e5 8. e4 Re8 9. h3 exd4 10. Nxd4 Nc5 11. Re1 a5
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 g1f3 d7d6 g2g3 e8g8 f1g2 b8d7 e1g1 e7e5 e2e4 f8e8 h2h3 e5d4 f3d4 d7c5 f1e1 a7a5
FEN: r1bqr1k1/1pp2pbp/3p1np1/p1n5/2PNP3/2N3PP/PP3PB1/R1BQR1K1 w – –

ECO: E69
Opening Name: King’s Indian Defense: Fianchetto Variation, Classical Main Line
SAN: 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nbd7 7. Nc3 e5 8. e4 c6 9. h3
UCI: d2d4 g8f6 c2c4 g7g6 g1f3 f8g7 g2g3 e8g8 f1g2 d7d6 e1g1 b8d7 b1c3 e7e5 e2e4 c7c6 h2h3
FEN: r1bq1rk1/pp1n1pbp/2pp1np1/4p3/2PPP3/2N2NPP/PP3PB1/R1BQ1RK1 b – –

ECO: E70
Opening Name: King’s Indian Defense: Accelerated Averbakh Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Bg5
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 c1g5
FEN: rnbqk2r/ppp1ppbp/3p1np1/6B1/2PPP3/2N5/PP3PPP/R2QKBNR b KQkq –

ECO: E70
Opening Name: King’s Indian Defense: Kramer Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nge2
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1e2
FEN: rnbqk2r/ppp1ppbp/3p1np1/8/2PPP3/2N5/PP2NPPP/R1BQKB1R b KQkq –

ECO: E70
Opening Name: King’s Indian Defense: Normal Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4
FEN: rnbqk2r/ppppppbp/5np1/8/2PPP3/2N5/PP3PPP/R1BQKBNR b KQkq –

ECO: E70
Opening Name: King’s Indian Defense: Normal Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6
FEN: rnbqk2r/ppp1ppbp/3p1np1/8/2PPP3/2N5/PP3PPP/R1BQKBNR w KQkq –

ECO: E71
Opening Name: King’s Indian Defense: Makogonov Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. h3
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 h2h3
FEN: rnbqk2r/ppp1ppbp/3p1np1/8/2PPP3/2N4P/PP3PP1/R1BQKBNR b KQkq –

ECO: E72
Opening Name: King’s Indian Defense: Normal Variation, Deferred Fianchetto
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. g3
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g2g3
FEN: rnbqk2r/ppp1ppbp/3p1np1/8/2PPP3/2N3P1/PP3P1P/R1BQKBNR b KQkq –

ECO: E72
Opening Name: King’s Indian Defense: Pomar System
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. g3 O-O 6. Bg2 e5 7. Nge2
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g2g3 e8g8 f1g2 e7e5 g1e2
FEN: rnbq1rk1/ppp2pbp/3p1np1/4p3/2PPP3/2N3P1/PP2NPBP/R1BQK2R b KQ –

ECO: E73
Opening Name: King’s Indian Defense: Averbakh Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f1e2 e8g8 c1g5
FEN: rnbq1rk1/ppp1ppbp/3p1np1/6B1/2PPP3/2N5/PP2BPPP/R2QK1NR b KQ –

ECO: E73
Opening Name: King’s Indian Defense: Averbakh Variation, Flexible Defense
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 h6
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f1e2 e8g8 c1g5 h7h6
FEN: rnbq1rk1/ppp1ppb1/3p1npp/6B1/2PPP3/2N5/PP2BPPP/R2QK1NR w KQ –

ECO: E73
Opening Name: King’s Indian Defense: Averbakh Variation, Geller Defense
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 Nbd7
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f1e2 e8g8 c1g5 b8d7
FEN: r1bq1rk1/pppnppbp/3p1np1/6B1/2PPP3/2N5/PP2BPPP/R2QK1NR w KQ –

ECO: E73
Opening Name: King’s Indian Defense: Averbakh Variation, Modern Defense
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 Na6
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f1e2 e8g8 c1g5 b8a6
FEN: r1bq1rk1/ppp1ppbp/n2p1np1/6B1/2PPP3/2N5/PP2BPPP/R2QK1NR w KQ –

ECO: E73
Opening Name: King’s Indian Defense: Averbakh Variation, Modern Defense, Burgess Line
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 Na6 7. Qd2 c6
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f1e2 e8g8 c1g5 b8a6 d1d2 c7c6
FEN: r1bq1rk1/pp2ppbp/n1pp1np1/6B1/2PPP3/2N5/PP1QBPPP/R3K1NR w KQ –

ECO: E73
Opening Name: King’s Indian Defense: Averbakh Variation, Nc6 Defense
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 Nc6
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f1e2 e8g8 c1g5 b8c6
FEN: r1bq1rk1/ppp1ppbp/2np1np1/6B1/2PPP3/2N5/PP2BPPP/R2QK1NR w KQ –

ECO: E73
Opening Name: King’s Indian Defense: Averbakh Variation, Spanish Defense
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 a6
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f1e2 e8g8 c1g5 a7a6
FEN: rnbq1rk1/1pp1ppbp/p2p1np1/6B1/2PPP3/2N5/PP2BPPP/R2QK1NR w KQ –

ECO: E73
Opening Name: King’s Indian Defense: Normal Variation, Standard Development
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f1e2
FEN: rnbqk2r/ppp1ppbp/3p1np1/8/2PPP3/2N5/PP2BPPP/R1BQK1NR b KQkq –

ECO: E73
Opening Name: King’s Indian Defense: Semi-Averbakh System
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Be3
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f1e2 e8g8 c1e3
FEN: rnbq1rk1/ppp1ppbp/3p1np1/8/2PPP3/2N1B3/PP2BPPP/R2QK1NR b KQ –

ECO: E74
Opening Name: King’s Indian Defense: Averbakh Variation, Benoni Defense
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 c5
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f1e2 e8g8 c1g5 c7c5
FEN: rnbq1rk1/pp2ppbp/3p1np1/2p3B1/2PPP3/2N5/PP2BPPP/R2QK1NR w KQ –

ECO: E74
Opening Name: King’s Indian Defense: Averbakh Variation, Benoni Defense, Advance Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 c5 7. d5
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f1e2 e8g8 c1g5 c7c5 d4d5
FEN: rnbq1rk1/pp2ppbp/3p1np1/2pP2B1/2P1P3/2N5/PP2BPPP/R2QK1NR b KQ –

ECO: E74
Opening Name: King’s Indian Defense: Averbakh Variation, Benoni Defense, Exchange Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 c5 7. dxc5
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f1e2 e8g8 c1g5 c7c5 d4c5
FEN: rnbq1rk1/pp2ppbp/3p1np1/2P3B1/2P1P3/2N5/PP2BPPP/R2QK1NR b KQ –

ECO: E75
Opening Name: King’s Indian Defense: Averbakh Variation, Main Line
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 c5 7. d5 e6
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f1e2 e8g8 c1g5 c7c5 d4d5 e7e6
FEN: rnbq1rk1/pp3pbp/3ppnp1/2pP2B1/2P1P3/2N5/PP2BPPP/R2QK1NR w KQ –

ECO: E76
Opening Name: King’s Indian Defense: Four Pawns Attack
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f4
FEN: rnbqk2r/ppp1ppbp/3p1np1/8/2PPPP2/2N5/PP4PP/R1BQKBNR b KQkq –

ECO: E76
Opening Name: King’s Indian Defense: Four Pawns Attack, Dynamic Attack
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 O-O 6. Nf3 c5 7. d5
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f4 e8g8 g1f3 c7c5 d4d5
FEN: rnbq1rk1/pp2ppbp/3p1np1/2pP4/2P1PP2/2N2N2/PP4PP/R1BQKB1R b KQ –

ECO: E76
Opening Name: King’s Indian Defense: Four Pawns Attack, Modern Defense
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 Na6
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f4 b8a6
FEN: r1bqk2r/ppp1ppbp/n2p1np1/8/2PPPP2/2N5/PP4PP/R1BQKBNR w KQkq –

ECO: E77
Opening Name: King’s Indian Defense: Four Pawns Attack
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. f4
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f1e2 e8g8 f2f4
FEN: rnbq1rk1/ppp1ppbp/3p1np1/8/2PPPP2/2N5/PP2B1PP/R1BQK1NR b KQ –

ECO: E77
Opening Name: King’s Indian Defense: Four Pawns Attack, Florentine Gambit
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 O-O 6. Nf3 c5 7. d5 e6 8. Be2 exd5 9. e5
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f4 e8g8 g1f3 c7c5 d4d5 e7e6 f1e2 e6d5 e4e5
FEN: rnbq1rk1/pp3pbp/3p1np1/2ppP3/2P2P2/2N2N2/PP2B1PP/R1BQK2R b KQ –

ECO: E77
Opening Name: King’s Indian Defense: Four Pawns Attack, Normal Attack
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 O-O 6. Nf3 c5 7. d5 e6 8. Be2
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f4 e8g8 g1f3 c7c5 d4d5 e7e6 f1e2
FEN: rnbq1rk1/pp3pbp/3ppnp1/2pP4/2P1PP2/2N2N2/PP2B1PP/R1BQK2R b KQ –

ECO: E77
Opening Name: King’s Indian Defense: Six Pawns Attack
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 O-O 6. Be2 c5 7. d5 e6 8. dxe6 fxe6 9. g4 Nc6 10. h4
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f4 e8g8 f1e2 c7c5 d4d5 e7e6 d5e6 f7e6 g2g4 b8c6 h2h4
FEN: r1bq1rk1/pp4bp/2nppnp1/2p5/2P1PPPP/2N5/PP2B3/R1BQK1NR b KQ –

ECO: E78
Opening Name: King’s Indian Defense: Four Pawns Attack, Fluid Attack
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 O-O 6. Nf3 c5 7. Be2
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f4 e8g8 g1f3 c7c5 f1e2
FEN: rnbq1rk1/pp2ppbp/3p1np1/2p5/2PPPP2/2N2N2/PP2B1PP/R1BQK2R b KQ –

ECO: E79
Opening Name: King’s Indian Defense: Four Pawns Attack, Exchange Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 O-O 6. Nf3 c5 7. Be2 cxd4 8. Nxd4 Nc6 9. Be3
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f4 e8g8 g1f3 c7c5 f1e2 c5d4 f3d4 b8c6 c1e3
FEN: r1bq1rk1/pp2ppbp/2np1np1/8/2PNPP2/2N1B3/PP2B1PP/R2QK2R b KQ –

ECO: E80
Opening Name: King’s Indian Defense: Sämisch Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3
FEN: rnbqk2r/ppp1ppbp/3p1np1/8/2PPP3/2N2P2/PP4PP/R1BQKBNR b KQkq –

ECO: E81
Opening Name: King’s Indian Defense: Steiner Attack
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Bg5
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1g5
FEN: rnbq1rk1/ppp1ppbp/3p1np1/6B1/2PPP3/2N2P2/PP4PP/R2QKBNR b KQ –

ECO: E81
Opening Name: King’s Indian Defense: Sämisch Variation, Bobotsov-Korchnoi-Petrosian Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Nge2
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 g1e2
FEN: rnbq1rk1/ppp1ppbp/3p1np1/8/2PPP3/2N2P2/PP2N1PP/R1BQKB1R b KQ –

ECO: E81
Opening Name: King’s Indian Defense: Sämisch Variation, Byrne Defense
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 c6 7. Bd3 a6
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1e3 c7c6 f1d3 a7a6
FEN: rnbq1rk1/1p2ppbp/p1pp1np1/8/2PPP3/2NBBP2/PP4PP/R2QK1NR w KQ –

ECO: E81
Opening Name: King’s Indian Defense: Sämisch Variation, Normal Defense
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8
FEN: rnbq1rk1/ppp1ppbp/3p1np1/8/2PPP3/2N2P2/PP4PP/R1BQKBNR w KQ –

ECO: E81
Opening Name: King’s Indian Defense: Sämisch Variation, Sämisch Gambit
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 c5
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1e3 c7c5
FEN: rnbq1rk1/pp2ppbp/3p1np1/2p5/2PPP3/2N1BP2/PP4PP/R2QKBNR w KQ –

ECO: E82
Opening Name: King’s Indian Defense: Sämisch Variation, Double Fianchetto
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 b6
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1e3 b7b6
FEN: rnbq1rk1/p1p1ppbp/1p1p1np1/8/2PPP3/2N1BP2/PP4PP/R2QKBNR w KQ –

ECO: E83
Opening Name: King’s Indian Defense: Sämisch Variation, Panno Formation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 Nc6 7. Nge2 a6
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1e3 b8c6 g1e2 a7a6
FEN: r1bq1rk1/1pp1ppbp/p1np1np1/8/2PPP3/2N1BP2/PP2N1PP/R2QKB1R w KQ –

ECO: E83
Opening Name: King’s Indian Defense: Sämisch Variation, Ruban Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 Nc6 7. Nge2 Rb8
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1e3 b8c6 g1e2 a8b8
FEN: 1rbq1rk1/ppp1ppbp/2np1np1/8/2PPP3/2N1BP2/PP2N1PP/R2QKB1R w KQ –

ECO: E83
Opening Name: King’s Indian Defense: Sämisch Variation, Yates Defense
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 Nc6
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1e3 b8c6
FEN: r1bq1rk1/ppp1ppbp/2np1np1/8/2PPP3/2N1BP2/PP4PP/R2QKBNR w KQ –

ECO: E84
Opening Name: King’s Indian Defense: Sämisch Variation, Panno Main Line
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 Nc6 7. Nge2 a6 8. Qd2 Rb8
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1e3 b8c6 g1e2 a7a6 d1d2 a8b8
FEN: 1rbq1rk1/1pp1ppbp/p1np1np1/8/2PPP3/2N1BP2/PP1QN1PP/R3KB1R w KQ –

ECO: E85
Opening Name: King’s Indian Defense: Sämisch Variation, Orthodox Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 e5
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1e3 e7e5
FEN: rnbq1rk1/ppp2pbp/3p1np1/4p3/2PPP3/2N1BP2/PP4PP/R2QKBNR w KQ –

ECO: E86
Opening Name: King’s Indian Defense: Sämisch Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 e5 7. Nge2 c6
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1e3 e7e5 g1e2 c7c6
FEN: rnbq1rk1/pp3pbp/2pp1np1/4p3/2PPP3/2N1BP2/PP2N1PP/R2QKB1R w KQ –

ECO: E87
Opening Name: King’s Indian Defense: Sämisch Variation, Bronstein Defense
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 e5 7. d5 Nh5 8. Qd2 Qh4+ 9. g3 Nxg3 10. Qf2 Nxf1 11. Qxh4 Nxe3 12. Ke2
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1e3 e7e5 d4d5 f6h5 d1d2 d8h4 g2g3 h5g3 d2f2 g3f1 f2h4 f1e3 e1e2
FEN: rnb2rk1/ppp2pbp/3p2p1/3Pp3/2P1P2Q/2N1nP2/PP2K2P/R5NR b – –

ECO: E87
Opening Name: King’s Indian Defense: Sämisch Variation, Closed Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 e5 7. d5
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1e3 e7e5 d4d5
FEN: rnbq1rk1/ppp2pbp/3p1np1/3Pp3/2P1P3/2N1BP2/PP4PP/R2QKBNR b KQ –

ECO: E87
Opening Name: King’s Indian Defense: Sämisch Variation, Orthodox Variation, Bronstein Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 e5 7. d5 Nh5 8. Qd2 Qh4+ 9. g3 Nxg3 10. Qf2 Nxf1 11. Qxh4 Nxe3 12. Ke2 Nxc4
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1e3 e7e5 d4d5 f6h5 d1d2 d8h4 g2g3 h5g3 d2f2 g3f1 f2h4 f1e3 e1e2 e3c4
FEN: rnb2rk1/ppp2pbp/3p2p1/3Pp3/2n1P2Q/2N2P2/PP2K2P/R5NR w – –

ECO: E89
Opening Name: King’s Indian Defense: Sämisch Variation, Closed Variation, Main Line
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 e5 7. Nge2 c6 8. d5 cxd5
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1e3 e7e5 g1e2 c7c6 d4d5 c6d5
FEN: rnbq1rk1/pp3pbp/3p1np1/3pp3/2P1P3/2N1BP2/PP2N1PP/R2QKB1R w KQ –

ECO: E90
Opening Name: King’s Indian Defense: Larsen Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be3
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 c1e3
FEN: rnbq1rk1/ppp1ppbp/3p1np1/8/2PPP3/2N1BN2/PP3PPP/R2QKB1R b KQ –

ECO: E90
Opening Name: King’s Indian Defense: Normal Variation, Rare Defenses
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3
FEN: rnbqk2r/ppp1ppbp/3p1np1/8/2PPP3/2N2N2/PP3PPP/R1BQKB1R b KQkq –

ECO: E90
Opening Name: King’s Indian Defense: Zinnowitz Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Bg5
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 c1g5
FEN: rnbq1rk1/ppp1ppbp/3p1np1/6B1/2PPP3/2N2N2/PP3PPP/R2QKB1R b KQ –

ECO: E91
Opening Name: King’s Indian Defense: Kazakh Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 Na6
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 b8a6
FEN: r1bq1rk1/ppp1ppbp/n2p1np1/8/2PPP3/2N2N2/PP2BPPP/R1BQK2R w KQ –

ECO: E91
Opening Name: King’s Indian Defense: Orthodox Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2
FEN: rnbq1rk1/ppp1ppbp/3p1np1/8/2PPP3/2N2N2/PP2BPPP/R1BQK2R b KQ –

ECO: E92
Opening Name: King’s Indian Defense: Exchange Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. dxe5
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 d4e5
FEN: rnbq1rk1/ppp2pbp/3p1np1/4P3/2P1P3/2N2N2/PP2BPPP/R1BQK2R b KQ –

ECO: E92
Opening Name: King’s Indian Defense: Orthodox Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5
FEN: rnbq1rk1/ppp2pbp/3p1np1/4p3/2PPP3/2N2N2/PP2BPPP/R1BQK2R w KQ –

ECO: E92
Opening Name: King’s Indian Defense: Orthodox Variation, Gligoric-Taimanov System
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. Be3
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 c1e3
FEN: rnbq1rk1/ppp2pbp/3p1np1/4p3/2PPP3/2N1BN2/PP2BPPP/R2QK2R b KQ –

ECO: E92
Opening Name: King’s Indian Defense: Petrosian Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. d5
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 d4d5
FEN: rnbq1rk1/ppp2pbp/3p1np1/3Pp3/2P1P3/2N2N2/PP2BPPP/R1BQK2R b KQ –

ECO: E92
Opening Name: King’s Indian Defense: Petrosian Variation, Stein Defense
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. d5 a5
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 d4d5 a7a5
FEN: rnbq1rk1/1pp2pbp/3p1np1/p2Pp3/2P1P3/2N2N2/PP2BPPP/R1BQK2R w KQ –

ECO: E93
Opening Name: King’s Indian Defense: Petrosian Variation, Keres Defense
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. d5 Nbd7 8. Bg5 h6 9. Bh4 g5 10. Bg3 Nh5 11. h4
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 d4d5 b8d7 c1g5 h7h6 g5h4 g6g5 h4g3 f6h5 h2h4
FEN: r1bq1rk1/pppn1pb1/3p3p/3Pp1pn/2P1P2P/2N2NB1/PP2BPP1/R2QK2R b KQ –

ECO: E93
Opening Name: King’s Indian Defense: Petrosian Variation, Normal Defense
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. d5 Nbd7
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 d4d5 b8d7
FEN: r1bq1rk1/pppn1pbp/3p1np1/3Pp3/2P1P3/2N2N2/PP2BPPP/R1BQK2R w KQ –

ECO: E94
Opening Name: King’s Indian Defense: Orthodox Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1
FEN: rnbq1rk1/ppp2pbp/3p1np1/4p3/2PPP3/2N2N2/PP2BPPP/R1BQ1RK1 b – –

ECO: E94
Opening Name: King’s Indian Defense: Orthodox Variation, Donner Defense
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O c6
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1 c7c6
FEN: rnbq1rk1/pp3pbp/2pp1np1/4p3/2PPP3/2N2N2/PP2BPPP/R1BQ1RK1 w – –

ECO: E94
Opening Name: King’s Indian Defense: Orthodox Variation, Glek Defense
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Na6
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1 b8a6
FEN: r1bq1rk1/ppp2pbp/n2p1np1/4p3/2PPP3/2N2N2/PP2BPPP/R1BQ1RK1 w – –

ECO: E94
Opening Name: King’s Indian Defense: Orthodox Variation, Positional Defense
SAN: 1. d4 Nf6 2. c4 d6 3. Nc3 Nbd7 4. e4 e5 5. Nf3 g6 6. Be2 Bg7 7. O-O O-O
UCI: d2d4 g8f6 c2c4 d7d6 b1c3 b8d7 e2e4 e7e5 g1f3 g7g6 f1e2 f8g7 e1g1 e8g8
FEN: r1bq1rk1/pppn1pbp/3p1np1/4p3/2PPP3/2N2N2/PP2BPPP/R1BQ1RK1 w – –

ECO: E94
Opening Name: King’s Indian Defense: Orthodox Variation, Positional Defense, Closed Line
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 Nbd7 7. O-O e5 8. d5
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 b8d7 e1g1 e7e5 d4d5
FEN: r1bq1rk1/pppn1pbp/3p1np1/3Pp3/2P1P3/2N2N2/PP2BPPP/R1BQ1RK1 b – –

ECO: E94
Opening Name: King’s Indian Defense: Orthodox Variation, Ukrainian Defense
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O a5
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1 a7a5
FEN: rnbq1rk1/1pp2pbp/3p1np1/p3p3/2PPP3/2N2N2/PP2BPPP/R1BQ1RK1 w – –

ECO: E95
Opening Name: King’s Indian Defense: Orthodox Variation
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nbd7 8. Re1
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1 b8d7 f1e1
FEN: r1bq1rk1/pppn1pbp/3p1np1/4p3/2PPP3/2N2N2/PP2BPPP/R1BQR1K1 b – –

ECO: E96
Opening Name: King’s Indian Defense: Orthodox Variation, Positional Defense, Main Line
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nbd7 8. Re1 c6 9. Bf1 a5
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1 b8d7 f1e1 c7c6 e2f1 a7a5
FEN: r1bq1rk1/1p1n1pbp/2pp1np1/p3p3/2PPP3/2N2N2/PP3PPP/R1BQRBK1 w – –

ECO: E97
Opening Name: King’s Indian Defense: Orthodox Variation, Aronin-Taimanov Defense
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1 b8c6
FEN: r1bq1rk1/ppp2pbp/2np1np1/4p3/2PPP3/2N2N2/PP2BPPP/R1BQ1RK1 w – –

ECO: E97
Opening Name: King’s Indian Defense: Orthodox Variation, Bayonet Attack
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. b4
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1 b8c6 d4d5 c6e7 b2b4
FEN: r1bq1rk1/ppp1npbp/3p1np1/3Pp3/1PP1P3/2N2N2/P3BPPP/R1BQ1RK1 b – –

ECO: E97
Opening Name: King’s Indian Defense: Orthodox Variation, Bayonet Attack, Sokolov’s Line
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. b4 Nh5 10. Re1
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1 b8c6 d4d5 c6e7 b2b4 f6h5 f1e1
FEN: r1bq1rk1/ppp1npbp/3p2p1/3Pp2n/1PP1P3/2N2N2/P3BPPP/R1BQR1K1 b – –

ECO: E97
Opening Name: King’s Indian Defense: Orthodox Variation, Bayonet Attack, Yepishin’s Line
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. b4 Nh5 10. Qc2
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1 b8c6 d4d5 c6e7 b2b4 f6h5 d1c2
FEN: r1bq1rk1/ppp1npbp/3p2p1/3Pp2n/1PP1P3/2N2N2/P1Q1BPPP/R1B2RK1 b – –

ECO: E97
Opening Name: King’s Indian Defense: Orthodox Variation, Korchnoi Attack
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. Bd2
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1 b8c6 d4d5 c6e7 c1d2
FEN: r1bq1rk1/ppp1npbp/3p1np1/3Pp3/2P1P3/2N2N2/PP1BBPPP/R2Q1RK1 b – –

ECO: E97
Opening Name: King’s Indian Defense: Orthodox Variation, Modern System
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. Nd2
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1 b8c6 d4d5 c6e7 f3d2
FEN: r1bq1rk1/ppp1npbp/3p1np1/3Pp3/2P1P3/2N5/PP1NBPPP/R1BQ1RK1 b – –

ECO: E98
Opening Name: King’s Indian Defense: Orthodox Variation, Classical System
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. Ne1
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1 b8c6 d4d5 c6e7 f3e1
FEN: r1bq1rk1/ppp1npbp/3p1np1/3Pp3/2P1P3/2N5/PP2BPPP/R1BQNRK1 b – –

ECO: E98
Opening Name: King’s Indian Defense: Orthodox Variation, Classical System, Kozul Gambit
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. Ne1 Nd7 10. Be3 f5 11. f3 f4 12. Bf2 g5 13. Rc1 Ng6 14. c5
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1 b8c6 d4d5 c6e7 f3e1 f6d7 c1e3 f7f5 f2f3 f5f4 e3f2 g6g5 a1c1 e7g6 c4c5
FEN: r1bq1rk1/pppn2bp/3p2n1/2PPp1p1/4Pp2/2N2P2/PP2BBPP/2RQNRK1 b – –

ECO: E98
Opening Name: King’s Indian Defense: Orthodox Variation, Classical System, Neo-Classical Line
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. Ne1 Nd7 10. Be3
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1 b8c6 d4d5 c6e7 f3e1 f6d7 c1e3
FEN: r1bq1rk1/pppnnpbp/3p2p1/3Pp3/2P1P3/2N1B3/PP2BPPP/R2QNRK1 b – –

ECO: E99
Opening Name: King’s Indian Defense: Orthodox Variation, Classical System, Benko Attack
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. Ne1 Nd7 10. f3 f5 11. g4
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1 b8c6 d4d5 c6e7 f3e1 f6d7 f2f3 f7f5 g2g4
FEN: r1bq1rk1/pppnn1bp/3p2p1/3Ppp2/2P1P1P1/2N2P2/PP2B2P/R1BQNRK1 b – –

ECO: E99
Opening Name: King’s Indian Defense: Orthodox Variation, Classical System, Traditional Line
SAN: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. Ne1 Nd7 10. f3 f5
UCI: d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1 b8c6 d4d5 c6e7 f3e1 f6d7 f2f3 f7f5
FEN: r1bq1rk1/pppnn1bp/3p2p1/3Ppp2/2P1P3/2N2P2/PP2B1PP/R1BQNRK1 w – –