Named Openings

A00 Amar Opening
1. Nh3
g1h3
rnbqkbnr/pppppppp/8/8/8/7N/PPPPPPPP/RNBQKB1R b KQkq -

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

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

A00 Amsterdam Attack
1. e3 e5 2. c4 d6 3. Nc3 Nc6 4. b3 Nf6
e2e3 e7e5 c2c4 d7d6 b1c3 b8c6 b2b3 g8f6
r1bqkb1r/ppp2ppp/2np1n2/4p3/2P5/1PN1P3/P2P1PPP/R1BQKBNR w KQkq -

A00 Anderssen's Opening
1. a3
a2a3
rnbqkbnr/pppppppp/8/8/8/P7/1PPPPPPP/RNBQKBNR b KQkq -

A00 Anderssen's Opening: Polish Gambit
1. a3 a5 2. b4
a2a3 a7a5 b2b4
rnbqkbnr/1ppppppp/8/p7/1P6/P7/2PPPPPP/RNBQKBNR b KQkq -

A00 Barnes Opening
1. f3
f2f3
rnbqkbnr/pppppppp/8/8/8/5P2/PPPPP1PP/RNBQKBNR b KQkq -

A00 Barnes Opening: Fool's Mate
1. f3 e5 2. g4 Qh4#
f2f3 e7e5 g2g4 d8h4
rnb1kbnr/pppp1ppp/8/4p3/6Pq/5P2/PPPPP2P/RNBQKBNR w KQkq -

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

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

A00 Barnes Opening: Hammerschlag
1. f3 e5 2. Kf2
f2f3 e7e5 e1f2
rnbqkbnr/pppp1ppp/8/4p3/8/5P2/PPPPPKPP/RNBQ1BNR b kq -

A00 Clemenz Opening
1. h3
h2h3
rnbqkbnr/pppppppp/8/8/8/7P/PPPPPPP1/RNBQKBNR b KQkq -

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

A00 Creepy Crawly Formation: Classical Defense
1. h3 d5 2. a3 e5
h2h3 d7d5 a2a3 e7e5
rnbqkbnr/ppp2ppp/8/3pp3/8/P6P/1PPPPPP1/RNBQKBNR w KQkq -

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

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

A00 Global Opening
1. h3 e5 2. a3
h2h3 e7e5 a2a3
rnbqkbnr/pppp1ppp/8/4p3/8/P6P/1PPPPPP1/RNBQKBNR b KQkq -

A00 Grob Opening
1. g4
g2g4
rnbqkbnr/pppppppp/8/8/6P1/8/PPPPPP1P/RNBQKBNR b KQkq -

A00 Grob Opening: Alessi Gambit
1. g4 f5
g2g4 f7f5
rnbqkbnr/ppppp1pp/8/5p2/6P1/8/PPPPPP1P/RNBQKBNR w KQkq -

A00 Grob Opening: Double Grob
1. g4 g5
g2g4 g7g5
rnbqkbnr/pppppp1p/8/6p1/6P1/8/PPPPPP1P/RNBQKBNR w KQkq -

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

A00 Grob Opening: Grob Gambit
1. g4 d5 2. Bg2
g2g4 d7d5 f1g2
rnbqkbnr/ppp1pppp/8/3p4/6P1/8/PPPPPPBP/RNBQK1NR b KQkq -

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

A00 Hungarian Opening
1. g3
g2g3
rnbqkbnr/pppppppp/8/8/8/6P1/PPPPPP1P/RNBQKBNR b KQkq -

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

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

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

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

A00 Hungarian Opening: Dutch Defense
1. g3 f5
g2g3 f7f5
rnbqkbnr/ppppp1pp/8/5p2/8/6P1/PPPPPP1P/RNBQKBNR w KQkq -

A00 Hungarian Opening: Indian Defense
1. g3 Nf6
g2g3 g8f6
rnbqkb1r/pppppppp/5n2/8/8/6P1/PPPPPP1P/RNBQKBNR w KQkq -

A00 Hungarian Opening: Myers Defense
1. g3 g5
g2g3 g7g5
rnbqkbnr/pppppp1p/8/6p1/8/6P1/PPPPPP1P/RNBQKBNR w KQkq -

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

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

A00 Hungarian Opening: Reversed Alekhine
1. g3 e5 2. Nf3
g2g3 e7e5 g1f3
rnbqkbnr/pppp1ppp/8/4p3/8/5NP1/PPPPPP1P/RNBQKB1R b KQkq -

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

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

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

A00 Hungarian Opening: Sicilian Invitation
1. g3 c5
g2g3 c7c5
rnbqkbnr/pp1ppppp/8/2p5/8/6P1/PPPPPP1P/RNBQKBNR w KQkq -

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

A00 Hungarian Opening: Symmetrical Variation
1. g3 g6
g2g3 g7g6
rnbqkbnr/pppppp1p/6p1/8/8/6P1/PPPPPP1P/RNBQKBNR w KQkq -

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

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

A00 Kádas Opening
1. h4
h2h4
rnbqkbnr/pppppppp/8/8/7P/8/PPPPPPP1/RNBQKBNR b KQkq -

A00 Kádas Opening: Beginner's Trap
1. h4 d5 2. Rh3
h2h4 d7d5 h1h3
rnbqkbnr/ppp1pppp/8/3p4/7P/7R/PPPPPPP1/RNBQKBN1 b Qkq -

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

A00 Kádas Opening: Kádas Gambit
1. h4 c5 2. b4
h2h4 c7c5 b2b4
rnbqkbnr/pp1ppppp/8/2p5/1P5P/8/P1PPPPP1/RNBQKBNR b KQkq -

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

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

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

A00 Kádas Opening: Schneider Gambit
1. h4 g5
h2h4 g7g5
rnbqkbnr/pppppp1p/8/6p1/7P/8/PPPPPPP1/RNBQKBNR w KQkq -

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

A00 Lasker Simul Special
1. g3 h5
g2g3 h7h5
rnbqkbnr/ppppppp1/8/7p/8/6P1/PPPPPP1P/RNBQKBNR w KQkq -

A00 Mieses Opening
1. d3
d2d3
rnbqkbnr/pppppppp/8/8/8/3P4/PPP1PPPP/RNBQKBNR b KQkq -

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

A00 Mieses Opening: Reversed Rat
1. d3 e5
d2d3 e7e5
rnbqkbnr/pppp1ppp/8/4p3/8/3P4/PPP1PPPP/RNBQKBNR w KQkq -

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

A00 Polish Opening
1. b4
b2b4
rnbqkbnr/pppppppp/8/8/1P6/8/P1PPPPPP/RNBQKBNR b KQkq -

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

A00 Polish Opening: Birmingham Gambit
1. b4 c5
b2b4 c7c5
rnbqkbnr/pp1ppppp/8/2p5/1P6/8/P1PPPPPP/RNBQKBNR w KQkq -

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

A00 Polish Opening: Bugayev Attack
1. b4 e5 2. a3
b2b4 e7e5 a2a3
rnbqkbnr/pppp1ppp/8/4p3/1P6/P7/2PPPPPP/RNBQKBNR b KQkq -

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

A00 Polish Opening: Dutch Defense
1. b4 f5
b2b4 f7f5
rnbqkbnr/ppppp1pp/8/5p2/1P6/8/P1PPPPPP/RNBQKBNR w KQkq -

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

A00 Polish Opening: Grigorian Variation
1. b4 Nc6
b2b4 b8c6
r1bqkbnr/pppppppp/2n5/8/1P6/8/P1PPPPPP/RNBQKBNR w KQkq -

A00 Polish Opening: Karniewski Variation
1. b4 Nh6
b2b4 g8h6
rnbqkb1r/pppppppp/7n/8/1P6/8/P1PPPPPP/RNBQKBNR w KQkq -

A00 Polish Opening: King's Indian Variation
1. b4 Nf6 2. Bb2 g6
b2b4 g8f6 c1b2 g7g6
rnbqkb1r/pppppp1p/5np1/8/1P6/8/PBPPPPPP/RN1QKBNR w KQkq -

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

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

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

A00 Polish Opening: Outflank Variation
1. b4 c6
b2b4 c7c6
rnbqkbnr/pp1ppppp/2p5/8/1P6/8/P1PPPPPP/RNBQKBNR w KQkq -

A00 Polish Opening: Queen's Indian Variation
1. b4 e6 2. Bb2 Nf6 3. b5 b6
b2b4 e7e6 c1b2 g8f6 b4b5 b7b6
rnbqkb1r/p1pp1ppp/1p2pn2/1P6/8/8/PBPPPPPP/RN1QKBNR w KQkq -

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

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

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

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

A00 Polish Opening: Symmetrical Variation
1. b4 b5
b2b4 b7b5
rnbqkbnr/p1pppppp/8/1p6/1P6/8/P1PPPPPP/RNBQKBNR w KQkq -

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

A00 Polish Opening: Wolferts Gambit
1. b4 e5 2. Bb2 c5
b2b4 e7e5 c1b2 c7c5
rnbqkbnr/pp1p1ppp/8/2p1p3/1P6/8/PBPPPPPP/RN1QKBNR w KQkq -

A00 Saragossa Opening
1. c3
c2c3
rnbqkbnr/pppppppp/8/8/8/2P5/PP1PPPPP/RNBQKBNR b KQkq -

A00 Sodium Attack
1. Na3
b1a3
rnbqkbnr/pppppppp/8/8/8/N7/PPPPPPPP/R1BQKBNR b KQkq -

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

A00 Sodium Attack: Chenoboskion Variation
1. Na3 g6 2. g4
b1a3 g7g6 g2g4
rnbqkbnr/pppppp1p/6p1/8/6P1/N7/PPPPPP1P/R1BQKBNR b KQkq -

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

A00 Valencia Opening
1. d3 e5 2. Nd2
d2d3 e7e5 b1d2
rnbqkbnr/pppp1ppp/8/4p3/8/3P4/PPPNPPPP/R1BQKBNR b KQkq -

A00 Van Geet Opening
1. Nc3
b1c3
rnbqkbnr/pppppppp/8/8/8/2N5/PPPPPPPP/R1BQKBNR b KQkq -

A00 Van Geet Opening: Battambang Variation
1. a3 e5 2. Nc3
a2a3 e7e5 b1c3
rnbqkbnr/pppp1ppp/8/4p3/8/P1N5/1PPPPPPP/R1BQKBNR b KQkq -

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

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

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

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

A00 Van Geet Opening: Düsseldorf Gambit
1. Nc3 c5 2. b4
b1c3 c7c5 b2b4
rnbqkbnr/pp1ppppp/8/2p5/1P6/2N5/P1PPPPPP/R1BQKBNR b KQkq -

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

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

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

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

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

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

A00 Van Geet Opening: Laroche Gambit
1. Nc3 b5
b1c3 b7b5
rnbqkbnr/p1pppppp/8/1p6/8/2N5/PPPPPPPP/R1BQKBNR w KQkq -

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

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

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

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

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

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

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

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

A00 Van Geet Opening: Reversed Nimzowitsch
1. Nc3 e5
b1c3 e7e5
rnbqkbnr/pppp1ppp/8/4p3/8/2N5/PPPPPPPP/R1BQKBNR w KQkq -

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

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

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

A00 Van Geet Opening: Twyble Attack
1. Nc3 c5 2. Rb1
b1c3 c7c5 a1b1
rnbqkbnr/pp1ppppp/8/2p5/8/2N5/PPPPPPPP/1RBQKBNR b Kkq -

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

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

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

A00 Van't Kruijs Opening
1. e3
e2e3
rnbqkbnr/pppppppp/8/8/8/4P3/PPPP1PPP/RNBQKBNR b KQkq -

A00 Van't Kruijs Opening: Bouncing Bishop Variation
1. e3 e5 2. Bc4 b5 3. Bb3
e2e3 e7e5 f1c4 b7b5 c4b3
rnbqkbnr/p1pp1ppp/8/1p2p3/8/1B2P3/PPPP1PPP/RNBQK1NR b KQkq -

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

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

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

A00 Ware Opening
1. a4
a2a4
rnbqkbnr/pppppppp/8/8/P7/8/1PPPPPPP/RNBQKBNR b KQkq -

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

A00 Ware Opening: Crab Variation
1. a4 e5 2. h4
a2a4 e7e5 h2h4
rnbqkbnr/pppp1ppp/8/4p3/P6P/8/1PPPPPP1/RNBQKBNR b KQkq -

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

A00 Ware Opening: Symmetric Variation
1. a4 a5
a2a4 a7a5
rnbqkbnr/1ppppppp/8/p7/P7/8/1PPPPPPP/RNBQKBNR w KQkq -

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

A00 Ware Opening: Wing Gambit
1. a4 b5 2. axb5 Bb7
a2a4 b7b5 a4b5 c8b7
rn1qkbnr/pbpppppp/8/1P6/8/8/1PPPPPPP/RNBQKBNR w KQkq -

A01 Nimzo-Larsen Attack
1. b3
b2b3
rnbqkbnr/pppppppp/8/8/8/1P6/P1PPPPPP/RNBQKBNR b KQkq -

A01 Nimzo-Larsen Attack: Classical Variation
1. b3 d5
b2b3 d7d5
rnbqkbnr/ppp1pppp/8/3p4/8/1P6/P1PPPPPP/RNBQKBNR w KQkq -

A01 Nimzo-Larsen Attack: Dutch Variation
1. b3 f5
b2b3 f7f5
rnbqkbnr/ppppp1pp/8/5p2/8/1P6/P1PPPPPP/RNBQKBNR w KQkq -

A01 Nimzo-Larsen Attack: English Variation
1. b3 c5
b2b3 c7c5
rnbqkbnr/pp1ppppp/8/2p5/8/1P6/P1PPPPPP/RNBQKBNR w KQkq -

A01 Nimzo-Larsen Attack: Graz Attack
1. b3 d5 2. Ba3
b2b3 d7d5 c1a3
rnbqkbnr/ppp1pppp/8/3p4/8/BP6/P1PPPPPP/RN1QKBNR b KQkq -

A01 Nimzo-Larsen Attack: Indian Variation
1. b3 Nf6
b2b3 g8f6
rnbqkb1r/pppppppp/5n2/8/8/1P6/P1PPPPPP/RNBQKBNR w KQkq -

A01 Nimzo-Larsen Attack: Modern Variation
1. b3 e5
b2b3 e7e5
rnbqkbnr/pppp1ppp/8/4p3/8/1P6/P1PPPPPP/RNBQKBNR w KQkq -

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

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

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

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

A01 Nimzo-Larsen Attack: Polish Variation
1. b3 b5
b2b3 b7b5
rnbqkbnr/p1pppppp/8/1p6/8/1P6/P1PPPPPP/RNBQKBNR w KQkq -

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

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

A01 Nimzo-Larsen Attack: Symmetrical Variation
1. b3 b6
b2b3 b7b6
rnbqkbnr/p1pppppp/1p6/8/8/1P6/P1PPPPPP/RNBQKBNR w KQkq -

A02 Bird Opening
1. f4
f2f4
rnbqkbnr/pppppppp/8/8/5P2/8/PPPPP1PP/RNBQKBNR b KQkq -

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

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

A02 Bird Opening: From's Gambit
1. f4 e5
f2f4 e7e5
rnbqkbnr/pppp1ppp/8/4p3/5P2/8/PPPPP1PP/RNBQKBNR w KQkq -

A02 Bird Opening: From's Gambit, Bahr Gambit
1. f4 e5 2. Nc3
f2f4 e7e5 b1c3
rnbqkbnr/pppp1ppp/8/4p3/5P2/2N5/PPPPP1PP/R1BQKBNR b KQkq -

A02 Bird Opening: From's Gambit, Langheld Gambit
1. f4 e5 2. fxe5 d6 3. exd6 Nf6
f2f4 e7e5 f4e5 d7d6 e5d6 g8f6
rnbqkb1r/ppp2ppp/3P1n2/8/8/8/PPPPP1PP/RNBQKBNR w KQkq -

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

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

A02 Bird Opening: Hobbs Gambit
1. f4 g5
f2f4 g7g5
rnbqkbnr/pppppp1p/8/6p1/5P2/8/PPPPP1PP/RNBQKBNR w KQkq -

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

A02 Bird Opening: Horsefly Defense
1. f4 Nh6
f2f4 g8h6
rnbqkb1r/pppppppp/7n/8/5P2/8/PPPPP1PP/RNBQKBNR w KQkq -

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

A02 Bird Opening: Mujannah
1. f4 Nf6 2. c4
f2f4 g8f6 c2c4
rnbqkb1r/pppppppp/5n2/8/2P2P2/8/PP1PP1PP/RNBQKBNR b KQkq -

A02 Bird Opening: Myers Defense
1. f4 b5
f2f4 b7b5
rnbqkbnr/p1pppppp/8/1p6/5P2/8/PPPPP1PP/RNBQKBNR w KQkq -

A02 Bird Opening: Platz Gambit
1. f4 e5 2. fxe5 Ne7
f2f4 e7e5 f4e5 g8e7
rnbqkb1r/ppppnppp/8/4P3/8/8/PPPPP1PP/RNBQKBNR w KQkq -

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

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

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

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

A03 Bird Opening: Dutch Variation
1. f4 d5
f2f4 d7d5
rnbqkbnr/ppp1pppp/8/3p4/5P2/8/PPPPP1PP/RNBQKBNR w KQkq -

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

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

A03 Bird Opening: Sturm Gambit
1. f4 d5 2. c4
f2f4 d7d5 c2c4
rnbqkbnr/ppp1pppp/8/3p4/2P2P2/8/PP1PP1PP/RNBQKBNR b KQkq -

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

A03 Bird Opening: Williams Gambit
1. f4 d5 2. e4
f2f4 d7d5 e2e4
rnbqkbnr/ppp1pppp/8/3p4/4PP2/8/PPPP2PP/RNBQKBNR b KQkq -

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

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

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

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

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

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

A04 Zukertort Defense: Kingside Variation
1. Nf3 Nh6 2. d4 g6
g1f3 g8h6 d2d4 g7g6
rnbqkb1r/pppppp1p/6pn/8/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq -

A04 Zukertort Defense: Sicilian Knight Variation
1. Nf3 Na6 2. e4 c5
g1f3 b8a6 e2e4 c7c5
r1bqkbnr/pp1ppppp/n7/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -

A04 Zukertort Opening
1. Nf3
g1f3
rnbqkbnr/pppppppp/8/8/8/5N2/PPPPPPPP/RNBQKB1R b KQkq -

A04 Zukertort Opening: Arctic Defense
1. Nf3 f6
g1f3 f7f6
rnbqkbnr/ppppp1pp/5p2/8/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -

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

A04 Zukertort Opening: Basman Defense
1. Nf3 h6
g1f3 h7h6
rnbqkbnr/ppppppp1/7p/8/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -

A04 Zukertort Opening: Black Mustang Defense
1. Nf3 Nc6
g1f3 b8c6
r1bqkbnr/pppppppp/2n5/8/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -

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

A04 Zukertort Opening: Dutch Variation
1. Nf3 f5
g1f3 f7f5
rnbqkbnr/ppppp1pp/8/5p2/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -

A04 Zukertort Opening: Herrstrom Gambit
1. Nf3 g5
g1f3 g7g5
rnbqkbnr/pppppp1p/8/6p1/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -

A04 Zukertort Opening: Kingside Fianchetto
1. Nf3 g6
g1f3 g7g6
rnbqkbnr/pppppp1p/6p1/8/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -

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

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

A04 Zukertort Opening: Pirc Invitation
1. Nf3 d6
g1f3 d7d6
rnbqkbnr/ppp1pppp/3p4/8/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -

A04 Zukertort Opening: Polish Defense
1. Nf3 b5
g1f3 b7b5
rnbqkbnr/p1pppppp/8/1p6/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -

A04 Zukertort Opening: Queen's Gambit Invitation
1. Nf3 e6
g1f3 e7e6
rnbqkbnr/pppp1ppp/4p3/8/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -

A04 Zukertort Opening: Queenside Fianchetto Variation
1. Nf3 b6
g1f3 b7b6
rnbqkbnr/p1pppppp/1p6/8/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -

A04 Zukertort Opening: Ross Gambit
1. Nf3 e5
g1f3 e7e5
rnbqkbnr/pppp1ppp/8/4p3/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -

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

A04 Zukertort Opening: Sicilian Invitation
1. Nf3 c5
g1f3 c7c5
rnbqkbnr/pp1ppppp/8/2p5/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -

A04 Zukertort Opening: Slav Invitation
1. Nf3 c6
g1f3 c7c6
rnbqkbnr/pp1ppppp/2p5/8/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -

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

A04 Zukertort Opening: St. George Defense
1. Nf3 a6
g1f3 a7a6
rnbqkbnr/1ppppppp/p7/8/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -

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

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

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

A04 Zukertort Opening: Ware Defense
1. Nf3 a5
g1f3 a7a5
rnbqkbnr/1ppppppp/8/p7/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -

A05 King's Indian Attack
1. Nf3 Nf6 2. g3 d5
g1f3 g8f6 g2g3 d7d5
rnbqkb1r/ppp1pppp/5n2/3p4/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq -

A05 King's Indian Attack: Smyslov Variation
1. Nf3 Nf6 2. g3 g6 3. b4
g1f3 g8f6 g2g3 g7g6 b2b4
rnbqkb1r/pppppp1p/5np1/8/1P6/5NP1/P1PPPP1P/RNBQKB1R b KQkq -

A05 King's Indian Attack: Spassky Variation
1. Nf3 Nf6 2. g3 b5
g1f3 g8f6 g2g3 b7b5
rnbqkb1r/p1pppppp/5n2/1p6/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq -

A05 King's Indian Attack: Symmetrical Defense
1. Nf3 Nf6 2. g3 g6
g1f3 g8f6 g2g3 g7g6
rnbqkb1r/pppppp1p/5np1/8/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq -

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

A05 Polish Opening: Zukertort System
1. Nf3 Nf6 2. b4
g1f3 g8f6 b2b4
rnbqkb1r/pppppppp/5n2/8/1P6/5N2/P1PPPPPP/RNBQKB1R b KQkq -

A05 Zukertort Opening
1. Nf3 Nf6
g1f3 g8f6
rnbqkb1r/pppppppp/5n2/8/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -

A05 Zukertort Opening
1. Nf3 Nf6 2. Nc3 Nc6
g1f3 g8f6 b1c3 b8c6
r1bqkb1r/pppppppp/2n2n2/8/8/2N2N2/PPPPPPPP/R1BQKB1R w KQkq -

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

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

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

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

A05 Zukertort Opening: Quiet System
1. Nf3 Nf6 2. e3
g1f3 g8f6 e2e3
rnbqkb1r/pppppppp/5n2/8/8/4PN2/PPPP1PPP/RNBQKB1R b KQkq -

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

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

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

A06 Zukertort Opening
1. Nf3 d5
g1f3 d7d5
rnbqkbnr/ppp1pppp/8/3p4/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -

A06 Zukertort Opening: Ampel Variation
1. Nf3 d5 2. Rg1
g1f3 d7d5 h1g1
rnbqkbnr/ppp1pppp/8/3p4/8/5N2/PPPPPPPP/RNBQKBR1 b Qkq -

A06 Zukertort Opening: Old Indian Attack
1. Nf3 d5 2. d3
g1f3 d7d5 d2d3
rnbqkbnr/ppp1pppp/8/3p4/8/3P1N2/PPP1PPPP/RNBQKB1R b KQkq -

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

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

A06 Zukertort Opening: Reversed Mexican Defense
1. Nf3 d5 2. Nc3
g1f3 d7d5 b1c3
rnbqkbnr/ppp1pppp/8/3p4/8/2N2N2/PPPPPPPP/R1BQKB1R b KQkq -

A06 Zukertort Opening: Santasiere's Folly
1. b4 d5 2. Nf3
b2b4 d7d5 g1f3
rnbqkbnr/ppp1pppp/8/3p4/1P6/5N2/P1PPPPPP/RNBQKB1R b KQkq -

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

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

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

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

A07 King's Indian Attack
1. Nf3 d5 2. g3
g1f3 d7d5 g2g3
rnbqkbnr/ppp1pppp/8/3p4/8/5NP1/PPPPPP1P/RNBQKB1R b KQkq -

A07 King's Indian Attack: Double Fianchetto
1. Nf3 d5 2. g3 g6
g1f3 d7d5 g2g3 g7g6
rnbqkbnr/ppp1pp1p/6p1/3p4/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq -

A07 King's Indian Attack: Keres Variation
1. Nf3 d5 2. g3 Bg4
g1f3 d7d5 g2g3 c8g4
rn1qkbnr/ppp1pppp/8/3p4/6b1/5NP1/PPPPPP1P/RNBQKB1R w KQkq -

A07 King's Indian Attack: Keres Variation
1. Nf3 d5 2. g3 Bg4 3. Bg2 Nd7
g1f3 d7d5 g2g3 c8g4 f1g2 b8d7
r2qkbnr/pppnpppp/8/3p4/6b1/5NP1/PPPPPPBP/RNBQK2R w KQkq -

A07 King's Indian Attack: Omega-Delta Gambit
1. Nf3 d5 2. g3 e5
g1f3 d7d5 g2g3 e7e5
rnbqkbnr/ppp2ppp/8/3pp3/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq -

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

A07 King's Indian Attack: Sicilian Variation
1. Nf3 d5 2. g3 c5
g1f3 d7d5 g2g3 c7c5
rnbqkbnr/pp2pppp/8/2pp4/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq -

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

A08 King's Indian Attack: French Variation
1. Nf3 d5 2. g3 c5 3. Bg2 Nc6
g1f3 d7d5 g2g3 c7c5 f1g2 b8c6
r1bqkbnr/pp2pppp/2n5/2pp4/8/5NP1/PPPPPPBP/RNBQK2R w KQkq -

A08 King's Indian Attack: Sicilian Variation
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
e2e4 e7e6 d2d3 d7d5 b1d2 g8f6 g1f3 c7c5 g2g3 b8c6 f1g2 f8e7 e1g1 e8g8 f1e1
r1bq1rk1/pp2bppp/2n1pn2/2pp4/4P3/3P1NP1/PPPN1PBP/R1BQR1K1 b - -

A08 King's Indian Attack: Sicilian Variation
1. Nf3 d5 2. g3 c5 3. Bg2
g1f3 d7d5 g2g3 c7c5 f1g2
rnbqkbnr/pp2pppp/8/2pp4/8/5NP1/PPPPPPBP/RNBQK2R b KQkq -

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

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

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

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

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

A09 Réti Opening
1. Nf3 d5 2. c4
g1f3 d7d5 c2c4
rnbqkbnr/ppp1pppp/8/3p4/2P5/5N2/PP1PPPPP/RNBQKB1R b KQkq -

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

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

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

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

A09 Réti Opening: Réti Accepted
1. Nf3 d5 2. c4 dxc4
g1f3 d7d5 c2c4 d5c4
rnbqkbnr/ppp1pppp/8/8/2p5/5N2/PP1PPPPP/RNBQKB1R w KQkq -

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

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

A10 English Opening
1. c4
c2c4
rnbqkbnr/pppppppp/8/8/2P5/8/PP1PPPPP/RNBQKBNR b KQkq -

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

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

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

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

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

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

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

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

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

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

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

A10 English Opening: Great Snake Variation
1. c4 g6
c2c4 g7g6
rnbqkbnr/pppppp1p/6p1/8/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -

A10 English Opening: Jaenisch Gambit
1. c4 b5
c2c4 b7b5
rnbqkbnr/p1pppppp/8/1p6/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -

A10 English Opening: King's English Variation, Botvinnik System, Prickly Pawn Pass System
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
c2c4 g7g6 b1c3 f8g7 g2g3 g8f6 f1g2 e8g8 e2e4 d7d6 g1e2 e7e5 e1g1 c7c6 d2d3 a7a6
rnbq1rk1/1p3pbp/p1pp1np1/4p3/2P1P3/2NP2P1/PP2NPBP/R1BQ1RK1 w - -

A10 English Opening: Myers Defense
1. c4 g5
c2c4 g7g5
rnbqkbnr/pppppp1p/8/6p1/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -

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

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

A10 English Opening: Wade Gambit
1. c4 f5 2. g4
c2c4 f7f5 g2g4
rnbqkbnr/ppppp1pp/8/5p2/2P3P1/8/PP1PPP1P/RNBQKBNR b KQkq -

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

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

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

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

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

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

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

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

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

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

A13 English Opening: Agincourt Defense
1. c4 e6
c2c4 e7e6
rnbqkbnr/pppp1ppp/4p3/8/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

A15 English Orangutan
1. c4 Nf6 2. b4
c2c4 g8f6 b2b4
rnbqkb1r/pppppppp/5n2/8/1PP5/8/P2PPPPP/RNBQKBNR b KQkq -

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

A20 English Opening: King's English Variation
1. c4 e5
c2c4 e7e5
rnbqkbnr/pppp1ppp/8/4p3/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -

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

A20 English Opening: King's English Variation, Nimzowitsch Variation
1. c4 e5 2. Nf3
c2c4 e7e5 g1f3
rnbqkbnr/pppp1ppp/8/4p3/2P5/5N2/PP1PPPPP/RNBQKB1R b KQkq -

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

A21 English Opening: King's English Variation
1. c4 e5 2. Nc3 d6 3. Nf3
c2c4 e7e5 b1c3 d7d6 g1f3
rnbqkbnr/ppp2ppp/3p4/4p3/2P5/2N2N2/PP1PPPPP/R1BQKB1R b KQkq -

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

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

A21 English Opening: King's English Variation, Reversed Sicilian
1. c4 e5 2. Nc3
c2c4 e7e5 b1c3
rnbqkbnr/pppp1ppp/8/4p3/2P5/2N5/PP1PPPPP/R1BQKBNR b KQkq -

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

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

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

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

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

A22 English Opening: King's English Variation, Two Knights Variation
1. c4 e5 2. Nc3 Nf6
c2c4 e7e5 b1c3 g8f6
rnbqkb1r/pppp1ppp/5n2/4p3/2P5/2N5/PP1PPPPP/R1BQKBNR w KQkq -

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

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

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

A22 English Opening: King's English, Mazedonisch
1. c4 e5 2. Nc3 Nf6 3. f4
c2c4 e7e5 b1c3 g8f6 f2f4
rnbqkb1r/pppp1ppp/5n2/4p3/2P2P2/2N5/PP1PP1PP/R1BQKBNR b KQkq -

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

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

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

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

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

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

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

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

A25 English Opening: King's English Variation, Reversed Closed Sicilian
1. c4 e5 2. Nc3 Nc6
c2c4 e7e5 b1c3 b8c6
r1bqkbnr/pppp1ppp/2n5/4p3/2P5/2N5/PP1PPPPP/R1BQKBNR w KQkq -

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

A30 English Opening: Symmetrical Variation
1. c4 c5
c2c4 c7c5
rnbqkbnr/pp1ppppp/8/2p5/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -

A30 English Opening: Symmetrical Variation
1. c4 c5 2. Nf3
c2c4 c7c5 g1f3
rnbqkbnr/pp1ppppp/8/2p5/2P5/5N2/PP1PPPPP/RNBQKB1R b KQkq -

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

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

A30 English Opening: Symmetrical, Hedgehog, Flexible Formation
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
c2c4 e7e6 g1f3 c7c5 b1c3 g8f6 g2g3 b7b6 f1g2 c8b7 e1g1 f8e7 d2d4 c5d4 d1d4 d7d6 f1d1 a7a6 b2b3 b8d7
r2qk2r/1b1nbppp/pp1ppn2/8/2PQ4/1PN2NP1/P3PPBP/R1BR2K1 w kq -

A30 English Opening: Wing Gambit
1. c4 c5 2. b4
c2c4 c7c5 b2b4
rnbqkbnr/pp1ppppp/8/2p5/1PP5/8/P2PPPPP/RNBQKBNR b KQkq -

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

A40 Australian Defense
1. d4 Na6
d2d4 b8a6
r1bqkbnr/pppppppp/n7/8/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -

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

A40 Borg Defense: Borg Gambit
1. d4 g5
d2d4 g7g5
rnbqkbnr/pppppp1p/8/6p1/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -

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

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

A40 English Defense
1. d4 b6
d2d4 b7b6
rnbqkbnr/p1pppppp/1p6/8/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -

A40 English Defense
1. d4 e6 2. c4 b6
d2d4 e7e6 c2c4 b7b6
rnbqkbnr/p1pp1ppp/1p2p3/8/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -

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

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

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

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

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

A40 Englund Gambit
1. d4 e5
d2d4 e7e5
rnbqkbnr/pppp1ppp/8/4p3/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -

A40 Englund Gambit Declined
1. d4 e5 2. d5
d2d4 e7e5 d4d5
rnbqkbnr/pppp1ppp/8/3Pp3/8/8/PPP1PPPP/RNBQKBNR b KQkq -

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

A40 Englund Gambit Declined: Reversed Alekhine
1. d4 e5 2. Nf3
d2d4 e7e5 g1f3
rnbqkbnr/pppp1ppp/8/4p3/3P4/5N2/PPP1PPPP/RNBQKB1R b KQkq -

A40 Englund Gambit Declined: Reversed Brooklyn
1. d4 e5 2. Nf3 e4 3. Ng1
d2d4 e7e5 g1f3 e5e4 f3g1
rnbqkbnr/pppp1ppp/8/8/3Pp3/8/PPP1PPPP/RNBQKBNR b KQkq -

A40 Englund Gambit Declined: Reversed French
1. d4 e5 2. e3
d2d4 e7e5 e2e3
rnbqkbnr/pppp1ppp/8/4p3/3P4/4P3/PPP2PPP/RNBQKBNR b KQkq -

A40 Englund Gambit Declined: Reversed Krebs
1. d4 e5 2. Nf3 e4
d2d4 e7e5 g1f3 e5e4
rnbqkbnr/pppp1ppp/8/8/3Pp3/5N2/PPP1PPPP/RNBQKB1R w KQkq -

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

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

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

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

A40 Englund Gambit: Mosquito Gambit
1. d4 e5 2. dxe5 Qh4
d2d4 e7e5 d4e5 d8h4
rnb1kbnr/pppp1ppp/8/4P3/7q/8/PPP1PPPP/RNBQKBNR w KQkq -

A40 Englund Gambit: Soller Gambit
1. d4 e5 2. dxe5 f6
d2d4 e7e5 d4e5 f7f6
rnbqkbnr/pppp2pp/5p2/4P3/8/8/PPP1PPPP/RNBQKBNR w KQkq -

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

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

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

A40 Horwitz Defense
1. d4 e6
d2d4 e7e6
rnbqkbnr/pppp1ppp/4p3/8/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -

A40 Horwitz Defense: Zilbermints Gambit
1. d4 e6 2. c4 e5
d2d4 e7e6 c2c4 e6e5
rnbqkbnr/pppp1ppp/8/4p3/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -

A40 Kangaroo Defense
1. d4 e6 2. c4 Bb4+
d2d4 e7e6 c2c4 f8b4
rnbqk1nr/pppp1ppp/4p3/8/1bPP4/8/PP2PPPP/RNBQKBNR w KQkq -

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

A40 Mikenas Defense
1. d4 Nc6
d2d4 b8c6
r1bqkbnr/pppppppp/2n5/8/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -

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

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

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

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

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

A40 Montevideo Defense
1. d4 Nc6 2. d5 Nb8
d2d4 b8c6 d4d5 c6b8
rnbqkbnr/pppppppp/8/3P4/8/8/PPP1PPPP/RNBQKBNR w KQkq -

A40 Polish Defense
1. d4 b5
d2d4 b7b5
rnbqkbnr/p1pppppp/8/1p6/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -

A40 Polish Defense: Spassky Gambit Accepted
1. d4 b5 2. e4 Bb7 3. Bxb5
d2d4 b7b5 e2e4 c8b7 f1b5
rn1qkbnr/pbpppppp/8/1B6/3PP3/8/PPP2PPP/RNBQK1NR b KQkq -

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

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

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

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

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

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

A40 Queen's Pawn Game
1. d4
d2d4
rnbqkbnr/pppppppp/8/8/3P4/8/PPP1PPPP/RNBQKBNR b KQkq -

A40 Queen's Pawn Game: Anglo-Slav Opening
1. d4 c6 2. c4 d6
d2d4 c7c6 c2c4 d7d6
rnbqkbnr/pp2pppp/2pp4/8/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -

A40 Queen's Pawn Game: Modern Defense
1. d4 g6
d2d4 g7g6
rnbqkbnr/pppppp1p/6p1/8/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -

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

A40 Zaire Defense
1. d4 Nc6 2. d5 Nb8 3. e4 Nf6 4. e5 Ng8
d2d4 b8c6 d4d5 c6b8 e2e4 g8f6 e4e5 f6g8
rnbqkbnr/pppppppp/8/3PP3/8/8/PPP2PPP/RNBQKBNR w KQkq -

A41 Modern Defense
1. d4 g6 2. c4 Bg7 3. Nc3 d6
d2d4 g7g6 c2c4 f8g7 b1c3 d7d6
rnbqk1nr/ppp1ppbp/3p2p1/8/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq -

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

A41 Old Indian Defense
1. d4 d6 2. c4
d2d4 d7d6 c2c4
rnbqkbnr/ppp1pppp/3p4/8/2PP4/8/PP2PPPP/RNBQKBNR b KQkq -

A41 Queen's Pawn Game
1. d4 d6
d2d4 d7d6
rnbqkbnr/ppp1pppp/3p4/8/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -

A41 Rat Defense: English Rat
1. d4 d6 2. c4 e5
d2d4 d7d6 c2c4 e7e5
rnbqkbnr/ppp2ppp/3p4/4p3/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -

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

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

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

A41 Wade Defense
1. d4 d6 2. Nf3 Bg4
d2d4 d7d6 g1f3 c8g4
rn1qkbnr/ppp1pppp/3p4/8/3P2b1/5N2/PPP1PPPP/RNBQKB1R w KQkq -

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

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

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

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

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

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

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

A43 Benoni Defense: Benoni Gambit Accepted
1. d4 c5 2. dxc5
d2d4 c7c5 d4c5
rnbqkbnr/pp1ppppp/8/2P5/8/8/PPP1PPPP/RNBQKBNR b KQkq -

A43 Benoni Defense: Benoni Gambit, Schlenker Defense
1. d4 c5 2. dxc5 Na6
d2d4 c7c5 d4c5 b8a6
r1bqkbnr/pp1ppppp/n7/2P5/8/8/PPP1PPPP/RNBQKBNR w KQkq -

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

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

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

A43 Benoni Defense: Cormorant Gambit
1. d4 c5 2. dxc5 b6
d2d4 c7c5 d4c5 b7b6
rnbqkbnr/p2ppppp/1p6/2P5/8/8/PPP1PPPP/RNBQKBNR w KQkq -

A43 Benoni Defense: French Benoni
1. e4 e6 2. d4 c5 3. d5
e2e4 e7e6 d2d4 c7c5 d4d5
rnbqkbnr/pp1p1ppp/4p3/2pP4/4P3/8/PPP2PPP/RNBQKBNR b KQkq -

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

A43 Benoni Defense: Old Benoni
1. d4 c5
d2d4 c7c5
rnbqkbnr/pp1ppppp/8/2p5/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -

A43 Benoni Defense: Old Benoni
1. d4 c5 2. d5
d2d4 c7c5 d4d5
rnbqkbnr/pp1ppppp/8/2pP4/8/8/PPP1PPPP/RNBQKBNR b KQkq -

A43 Benoni Defense: Old Benoni
1. d4 c5 2. d5 d6
d2d4 c7c5 d4d5 d7d6
rnbqkbnr/pp2pppp/3p4/2pP4/8/8/PPP1PPPP/RNBQKBNR w KQkq -

A43 Benoni Defense: Old Benoni, Mujannah Formation
1. d4 c5 2. d5 f5
d2d4 c7c5 d4d5 f7f5
rnbqkbnr/pp1pp1pp/8/2pP1p2/8/8/PPP1PPPP/RNBQKBNR w KQkq -

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

A43 Benoni Defense: Snail Variation
1. d4 c5 2. d5 Na6
d2d4 c7c5 d4d5 b8a6
r1bqkbnr/pp1ppppp/n7/2pP4/8/8/PPP1PPPP/RNBQKBNR w KQkq -

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

A43 Benoni Defense: Zilbermints-Benoni Gambit
1. d4 c5 2. b4
d2d4 c7c5 b2b4
rnbqkbnr/pp1ppppp/8/2p5/1P1P4/8/P1P1PPPP/RNBQKBNR b KQkq -

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

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

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

A43 Queen's Pawn Game: Liedmann Gambit
1. d4 c5 2. c4 cxd4 3. e3
d2d4 c7c5 c2c4 c5d4 e2e3
rnbqkbnr/pp1ppppp/8/8/2Pp4/4P3/PP3PPP/RNBQKBNR b KQkq -

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

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

A45 Amazon Attack: Siberian Attack
1. d4 Nf6 2. Nc3 d5 3. Qd3
d2d4 g8f6 b1c3 d7d5 d1d3
rnbqkb1r/ppp1pppp/5n2/3p4/3P4/2NQ4/PPP1PPPP/R1B1KBNR b KQkq -

A45 Canard Opening
1. d4 Nf6 2. f4
d2d4 g8f6 f2f4
rnbqkb1r/pppppppp/5n2/8/3P1P2/8/PPP1P1PP/RNBQKBNR b KQkq -

A45 Indian Defense
1. d4 Nf6
d2d4 g8f6
rnbqkb1r/pppppppp/5n2/8/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -

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

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

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

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

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

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

A45 Indian Defense: Lazard Gambit
1. d4 Nf6 2. Nd2 e5
d2d4 g8f6 b1d2 e7e5
rnbqkb1r/pppp1ppp/5n2/4p3/3P4/8/PPPNPPPP/R1BQKBNR w KQkq -

A45 Indian Defense: Maddigan Gambit
1. d4 Nf6 2. Nc3 e5
d2d4 g8f6 b1c3 e7e5
rnbqkb1r/pppp1ppp/5n2/4p3/3P4/2N5/PPP1PPPP/R1BQKBNR w KQkq -

A45 Indian Defense: Omega Gambit
1. d4 Nf6 2. e4
d2d4 g8f6 e2e4
rnbqkb1r/pppppppp/5n2/8/3PP3/8/PPP2PPP/RNBQKBNR b KQkq -

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

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

A45 Indian Defense: Pawn Push Variation
1. d4 Nf6 2. d5
d2d4 g8f6 d4d5
rnbqkb1r/pppppppp/5n2/3P4/8/8/PPP1PPPP/RNBQKBNR b KQkq -

A45 Indian Defense: Reversed Chigorin Defense
1. d4 Nf6 2. Nc3 c5
d2d4 g8f6 b1c3 c7c5
rnbqkb1r/pp1ppppp/5n2/2p5/3P4/2N5/PPP1PPPP/R1BQKBNR w KQkq -

A45 Indian Defense: Tartakower Attack
1. d4 Nf6 2. g3
d2d4 g8f6 g2g3
rnbqkb1r/pppppppp/5n2/8/3P4/6P1/PPP1PP1P/RNBQKBNR b KQkq -

A45 Paleface Attack
1. d4 Nf6 2. f3
d2d4 g8f6 f2f3
rnbqkb1r/pppppppp/5n2/8/3P4/5P2/PPP1P1PP/RNBQKBNR b KQkq -

A45 Queen's Pawn Game: Chigorin Variation
1. d4 Nf6 2. Nc3 d5
d2d4 g8f6 b1c3 d7d5
rnbqkb1r/ppp1pppp/5n2/3p4/3P4/2N5/PPP1PPPP/R1BQKBNR w KQkq -

A45 Queen's Pawn Game: Veresov, Richter Attack
1. d4 Nf6 2. f3 d5 3. Nc3
d2d4 g8f6 f2f3 d7d5 b1c3
rnbqkb1r/ppp1pppp/5n2/3p4/3P4/2N2P2/PPP1P1PP/R1BQKBNR b KQkq -

A45 Trompowsky Attack
1. d4 Nf6 2. Bg5
d2d4 g8f6 c1g5
rnbqkb1r/pppppppp/5n2/6B1/3P4/8/PPP1PPPP/RN1QKBNR b KQkq -

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

A45 Trompowsky Attack: Classical Defense
1. d4 Nf6 2. Bg5 e6
d2d4 g8f6 c1g5 e7e6
rnbqkb1r/pppp1ppp/4pn2/6B1/3P4/8/PPP1PPPP/RN1QKBNR w KQkq -

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

A45 Trompowsky Attack: Edge Variation
1. d4 Nf6 2. Bg5 Ne4 3. Bh4
d2d4 g8f6 c1g5 f6e4 g5h4
rnbqkb1r/pppppppp/8/8/3Pn2B/8/PPP1PPPP/RN1QKBNR b KQkq -

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

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

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

A45 Trompowsky Attack: Raptor Variation
1. d4 Nf6 2. Bg5 Ne4 3. h4
d2d4 g8f6 c1g5 f6e4 h2h4
rnbqkb1r/pppppppp/8/6B1/3Pn2P/8/PPP1PPP1/RN1QKBNR b KQkq -

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

A46 Döry Defense
1. d4 Nf6 2. Nf3 Ne4
d2d4 g8f6 g1f3 f6e4
rnbqkb1r/pppppppp/8/8/3Pn3/5N2/PPP1PPPP/RNBQKB1R w KQkq -

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

A46 Indian Defense: Knights Variation
1. d4 Nf6 2. Nf3
d2d4 g8f6 g1f3
rnbqkb1r/pppppppp/5n2/8/3P4/5N2/PPP1PPPP/RNBQKB1R b KQkq -

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

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

A46 Indian Defense: Polish Variation
1. d4 Nf6 2. Nf3 b5
d2d4 g8f6 g1f3 b7b5
rnbqkb1r/p1pppppp/5n2/1p6/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq -

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

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

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

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

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

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

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

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

A46 Yusupov-Rubinstein System
1. d4 Nf6 2. Nf3 e6 3. e3
d2d4 g8f6 g1f3 e7e6 e2e3
rnbqkb1r/pppp1ppp/4pn2/8/3P4/4PN2/PPP2PPP/RNBQKB1R b KQkq -

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

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

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

A47 Pseudo Queen's Indian Defense
1. d4 Nf6 2. Nf3 b6
d2d4 g8f6 g1f3 b7b6
rnbqkb1r/p1pppppp/1p3n2/8/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq -

A48 East Indian Defense
1. d4 Nf6 2. Nf3 g6
d2d4 g8f6 g1f3 g7g6
rnbqkb1r/pppppp1p/5np1/8/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq -

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

A48 London System
1. d4 Nf6 2. Nf3 g6 3. Bf4
d2d4 g8f6 g1f3 g7g6 c1f4
rnbqkb1r/pppppp1p/5np1/8/3P1B2/5N2/PPP1PPPP/RN1QKB1R b KQkq -

A48 Queen's Pawn Game: Barry Attack
1. d4 Nf6 2. Nf3 g6 3. Nc3 d5 4. Bf4
d2d4 g8f6 g1f3 g7g6 b1c3 d7d5 c1f4
rnbqkb1r/ppp1pp1p/5np1/3p4/3P1B2/2N2N2/PPP1PPPP/R2QKB1R b KQkq -

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

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

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

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

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

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

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

A50 Indian Defense: Medusa Gambit
1. d4 Nf6 2. c4 g5
d2d4 g8f6 c2c4 g7g5
rnbqkb1r/pppppp1p/5n2/6p1/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -

A50 Indian Defense: Normal Variation
1. d4 Nf6 2. c4
d2d4 g8f6 c2c4
rnbqkb1r/pppppppp/5n2/8/2PP4/8/PP2PPPP/RNBQKBNR b KQkq -

A50 Indian Defense: Pyrenees Gambit
1. d4 Nf6 2. c4 b5
d2d4 g8f6 c2c4 b7b5
rnbqkb1r/p1pppppp/5n2/1p6/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -

A50 Mexican Defense
1. d4 Nf6 2. c4 Nc6
d2d4 g8f6 c2c4 b8c6
r1bqkb1r/pppppppp/2n2n2/8/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -

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

A50 Queen's Indian Accelerated
1. d4 Nf6 2. c4 b6
d2d4 g8f6 c2c4 b7b6
rnbqkb1r/p1pppppp/1p3n2/8/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -

A50 Slav Indian
1. d4 Nf6 2. c4 c6
d2d4 g8f6 c2c4 c7c6
rnbqkb1r/pp1ppppp/2p2n2/8/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -

A51 Indian Defense: Budapest Defense
1. d4 Nf6 2. c4 e5
d2d4 g8f6 c2c4 e7e5
rnbqkb1r/pppp1ppp/5n2/4p3/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -

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

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

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

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

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

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

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

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

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

A53 Old Indian Defense
1. d4 Nf6 2. c4 d6
d2d4 g8f6 c2c4 d7d6
rnbqkb1r/ppp1pppp/3p1n2/8/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -

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

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

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

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

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

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

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

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

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

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

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

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

A56 Benoni Defense
1. d4 Nf6 2. c4 c5
d2d4 g8f6 c2c4 c7c5
rnbqkb1r/pp1ppppp/5n2/2p5/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -

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

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

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

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

A56 Grünfeld Defense: Three Knights Variation, Burille Variation, Reversed Tarrasch
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
d2d4 g8f6 c2c4 c7c5 e2e3 g7g6 b1c3 f8g7 g1f3 e8g8 f1e2 c5d4 e3d4 d7d5 e1g1 b8c6
r1bq1rk1/pp2ppbp/2n2np1/3p4/2PP4/2N2N2/PP2BPPP/R1BQ1RK1 w - -

A56 Vulture Defense
1. d4 Nf6 2. c4 c5 3. d5 Ne4
d2d4 g8f6 c2c4 c7c5 d4d5 f6e4
rnbqkb1r/pp1ppppp/8/2pP4/2P1n3/8/PP2PPPP/RNBQKBNR w KQkq -

A57 Benko Gambit
1. d4 Nf6 2. c4 c5 3. d5 b5
d2d4 g8f6 c2c4 c7c5 d4d5 b7b5
rnbqkb1r/p2ppppp/5n2/1ppP4/2P5/8/PP2PPPP/RNBQKBNR w KQkq -

A57 Benko Gambit Accepted
1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6
d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6
rnbqkb1r/3ppppp/p4n2/1PpP4/8/8/PP2PPPP/RNBQKBNR w KQkq -

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

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

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

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

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

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

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

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

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

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

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

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

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

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

A58 Benko Gambit Accepted: Fianchetto Variation
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
d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6 b5a6 g7g6 b1c3 c8a6 g2g3 d7d6 f1g2 f8g7 g1f3
rn1qk2r/4ppbp/b2p1np1/2pP4/8/2N2NP1/PP2PPBP/R1BQK2R b KQkq -

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

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

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

A59 Benko Gambit
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
d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6 b5a6 g7g6 b1c3 c8a6 e2e4 a6f1 e1f1 d7d6 g2g3
rn1qkb1r/4pp1p/3p1np1/2pP4/4P3/2N3P1/PP3P1P/R1BQ1KNR b kq -

A59 Benko Gambit Accepted: King Walk Variation
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
d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6 b5a6 g7g6 b1c3 c8a6 g1f3 d7d6 e2e4 a6f1 e1f1 f8g7 g2g3 e8g8 f1g2
rn1q1rk1/4ppbp/3p1np1/2pP4/4P3/2N2NP1/PP3PKP/R1BQ3R b - -

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

A59 Benko Gambit Accepted: Yugoslav
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
d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6 b5a6 g7g6 b1c3 c8a6 e2e4 a6f1 e1f1 d7d6 g1e2
rn1qkb1r/4pp1p/3p1np1/2pP4/4P3/2N5/PP2NPPP/R1BQ1K1R b kq -

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

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

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

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

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

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

A62 Benoni Defense: Fianchetto Variation
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
d2d4 g8f6 c2c4 e7e6 g2g3 c7c5 d4d5 e6d5 c4d5 d7d6 b1c3 g7g6 f1g2 f8g7 g1f3 e8g8
rnbq1rk1/pp3pbp/3p1np1/2pP4/8/2N2NP1/PP2PPBP/R1BQK2R w KQ -

A63 Benoni Defense: Fianchetto Variation, Hastings Defense
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
d2d4 g8f6 c2c4 e7e6 g2g3 c7c5 d4d5 e6d5 c4d5 d7d6 b1c3 g7g6 f1g2 f8g7 g1f3 e8g8 e1g1 b8d7
r1bq1rk1/pp1n1pbp/3p1np1/2pP4/8/2N2NP1/PP2PPBP/R1BQ1RK1 w - -

A64 Benoni Defense: Fianchetto Variation, Hastings Defense, Main Line
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
d2d4 g8f6 c2c4 e7e6 g2g3 c7c5 d4d5 e6d5 c4d5 d7d6 b1c3 g7g6 f1g2 f8g7 g1f3 e8g8 e1g1 a7a6 a2a4 b8d7 f3d2 f8e8
r1bqr1k1/1p1n1pbp/p2p1np1/2pP4/P7/2N3P1/1P1NPPBP/R1BQ1RK1 w - -

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

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

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

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

A68 Benoni Defense: Four Pawns Attack
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
d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 f2f4 f8g7 g1f3 e8g8
rnbq1rk1/pp3pbp/3p1np1/2pP4/4PP2/2N2N2/PP4PP/R1BQKB1R w KQ -

A69 Benoni Defense: Four Pawns Attack, Main Line
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
d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f4 e8g8 g1f3 c7c5 d4d5 e7e6 f1e2 e6d5 c4d5 f8e8
rnbqr1k1/pp3pbp/3p1np1/2pP4/4PP2/2N2N2/PP2B1PP/R1BQK2R w KQ -

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

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

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

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

A72 Benoni Defense: Classical Variation
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
d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 g1f3 f8g7 f1e2 e8g8
rnbq1rk1/pp3pbp/3p1np1/2pP4/4P3/2N2N2/PP2BPPP/R1BQK2R w KQ -

A73 Benoni Defense: Classical Variation, Main Line
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
d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 g1f3 f8g7 f1e2 e8g8 e1g1
rnbq1rk1/pp3pbp/3p1np1/2pP4/4P3/2N2N2/PP2BPPP/R1BQ1RK1 b - -

A74 Benoni Defense: Classical Variation, Full Line
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
d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 g1f3 f8g7 f1e2 e8g8 e1g1 a7a6 a2a4
rnbq1rk1/1p3pbp/p2p1np1/2pP4/P3P3/2N2N2/1P2BPPP/R1BQ1RK1 b - -

A75 Benoni Defense: Classical Variation, Argentine Counterattack
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
d2d4 g8f6 c2c4 e7e6 g1f3 c7c5 d4d5 e6d5 c4d5 d7d6 b1c3 g7g6 e2e4 f8g7 f1e2 e8g8 e1g1 a7a6 a2a4 c8g4
rn1q1rk1/1p3pbp/p2p1np1/2pP4/P3P1b1/2N2N2/1P2BPPP/R1BQ1RK1 w - -

A76 Benoni Defense: Classical Variation, Czerniak Defense
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
d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 g1f3 f8g7 f1e2 e8g8 e1g1 f8e8
rnbqr1k1/pp3pbp/3p1np1/2pP4/4P3/2N2N2/PP2BPPP/R1BQ1RK1 w - -

A77 Benoni Defense: Classical Variation, Czerniak Defense, Tal Line
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
d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 g1f3 f8g7 f1e2 e8g8 e1g1 f8e8 f3d2
rnbqr1k1/pp3pbp/3p1np1/2pP4/4P3/2N5/PP1NBPPP/R1BQ1RK1 b - -

A78 Benoni Defense: Classical Variation, Czerniak Defense
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
d2d4 g8f6 c2c4 e7e6 g1f3 c7c5 d4d5 e6d5 c4d5 d7d6 b1c3 g7g6 e2e4 f8g7 f1e2 e8g8 e1g1 f8e8 f3d2 b8a6
r1bqr1k1/pp3pbp/n2p1np1/2pP4/4P3/2N5/PP1NBPPP/R1BQ1RK1 w - -

A79 Benoni Defense: Classical Variation, Czerniak Defense
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
d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 g1f3 f8g7 f1e2 e8g8 e1g1 f8e8 f3d2 b8a6 f2f3
r1bqr1k1/pp3pbp/n2p1np1/2pP4/4P3/2N2P2/PP1NB1PP/R1BQ1RK1 b - -

A80 Dutch Defense
1. d4 f5
d2d4 f7f5
rnbqkbnr/ppppp1pp/8/5p2/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -

A80 Dutch Defense: Alapin Variation
1. d4 f5 2. Qd3
d2d4 f7f5 d1d3
rnbqkbnr/ppppp1pp/8/5p2/3P4/3Q4/PPP1PPPP/RNB1KBNR b KQkq -

A80 Dutch Defense: Hevendehl Gambit
1. d4 f5 2. g4 e5
d2d4 f7f5 g2g4 e7e5
rnbqkbnr/pppp2pp/8/4pp2/3P2P1/8/PPP1PP1P/RNBQKBNR w KQkq -

A80 Dutch Defense: Hopton Attack
1. d4 f5 2. Bg5
d2d4 f7f5 c1g5
rnbqkbnr/ppppp1pp/8/5pB1/3P4/8/PPP1PPPP/RN1QKBNR b KQkq -

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

A80 Dutch Defense: Kingfisher Gambit
1. d4 f5 2. Nc3 d5 3. e4
d2d4 f7f5 b1c3 d7d5 e2e4
rnbqkbnr/ppp1p1pp/8/3p1p2/3PP3/2N5/PPP2PPP/R1BQKBNR b KQkq -

A80 Dutch Defense: Korchnoi Attack
1. d4 f5 2. h3
d2d4 f7f5 h2h3
rnbqkbnr/ppppp1pp/8/5p2/3P4/7P/PPP1PPP1/RNBQKBNR b KQkq -

A80 Dutch Defense: Krejcik Gambit
1. d4 f5 2. g4
d2d4 f7f5 g2g4
rnbqkbnr/ppppp1pp/8/5p2/3P2P1/8/PPP1PP1P/RNBQKBNR b KQkq -

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

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

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

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

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

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

A80 Dutch Defense: Raphael Variation
1. d4 f5 2. Nc3
d2d4 f7f5 b1c3
rnbqkbnr/ppppp1pp/8/5p2/3P4/2N5/PPP1PPPP/R1BQKBNR b KQkq -

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

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

A80 Queen's Pawn Game: Veresov Attack, Dutch System
1. d4 f5 2. Nc3 d5
d2d4 f7f5 b1c3 d7d5
rnbqkbnr/ppp1p1pp/8/3p1p2/3P4/2N5/PPP1PPPP/R1BQKBNR w KQkq -

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

A81 Dutch Defense: Fianchetto Attack
1. d4 f5 2. g3
d2d4 f7f5 g2g3
rnbqkbnr/ppppp1pp/8/5p2/3P4/6P1/PPP1PP1P/RNBQKBNR b KQkq -

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

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

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

A82 Dutch Defense: Blackmar's Second Gambit
1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. f3
d2d4 f7f5 e2e4 f5e4 b1c3 g8f6 f2f3
rnbqkb1r/ppppp1pp/5n2/8/3Pp3/2N2P2/PPP3PP/R1BQKBNR b KQkq -

A82 Dutch Defense: Staunton Gambit
1. d4 f5 2. e4
d2d4 f7f5 e2e4
rnbqkbnr/ppppp1pp/8/5p2/3PP3/8/PPP2PPP/RNBQKBNR b KQkq -

A82 Dutch Defense: Staunton Gambit Accepted
1. d4 f5 2. e4 fxe4
d2d4 f7f5 e2e4 f5e4
rnbqkbnr/ppppp1pp/8/8/3Pp3/8/PPP2PPP/RNBQKBNR w KQkq -

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

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

A82 Rat Defense: Balogh Defense
1. e4 d6 2. d4 f5
e2e4 d7d6 d2d4 f7f5
rnbqkbnr/ppp1p1pp/3p4/5p2/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -

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

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

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

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

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

A84 Dutch Defense
1. d4 f5 2. c4
d2d4 f7f5 c2c4
rnbqkbnr/ppppp1pp/8/5p2/2PP4/8/PP2PPPP/RNBQKBNR b KQkq -

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

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

A84 Dutch Defense: Classical Variation
1. d4 f5 2. c4 e6
d2d4 f7f5 c2c4 e7e6
rnbqkbnr/pppp2pp/4p3/5p2/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -

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

A84 Dutch Defense: Normal Variation
1. d4 f5 2. c4 Nf6
d2d4 f7f5 c2c4 g8f6
rnbqkb1r/ppppp1pp/5n2/5p2/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -

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

A85 Dutch Defense: Queen's Knight Variation
1. d4 f5 2. c4 Nf6 3. Nc3
d2d4 f7f5 c2c4 g8f6 b1c3
rnbqkb1r/ppppp1pp/5n2/5p2/2PP4/2N5/PP2PPPP/R1BQKBNR b KQkq -

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

A94 Dutch Defense: Stonewall Variation
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
d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 d7d5 b2b3 c7c6 c1a3
rnbq1rk1/pp2b1pp/2p1pn2/3p1p2/2PP4/BP3NP1/P3PPBP/RN1Q1RK1 b - -

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

A95 Dutch Defense: Stonewall Variation, Chekhover Variation
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
d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 d7d5 b1c3 c7c6 d1c2 d8e8 c1g5
rnb1qrk1/pp2b1pp/2p1pn2/3p1pB1/2PP4/2N2NP1/PPQ1PPBP/R4RK1 b - -

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

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

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

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

A97 Dutch Defense: Classical Variation, Ilyin-Zhenevsky Variation, Winter Variation
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
d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 d7d6 b1c3 d8e8 f1e1
rnb1qrk1/ppp1b1pp/3ppn2/5p2/2PP4/2N2NP1/PP2PPBP/R1BQR1K1 b - -

A98 Dutch Defense: Classical Variation, Ilyin-Zhenevsky Variation, Alatortsev-Lisitsyn Line
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
d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 d7d6 b1c3 d8e8 d1c2
rnb1qrk1/ppp1b1pp/3ppn2/5p2/2PP4/2N2NP1/PPQ1PPBP/R1B2RK1 b - -

A99 Dutch Defense: Classical Variation, Ilyin-Zhenevsky Variation, Modern Main Line
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
d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 d7d6 b1c3 d8e8 b2b3
rnb1qrk1/ppp1b1pp/3ppn2/5p2/2PP4/1PN2NP1/P3PPBP/R1BQ1RK1 b - -

B00 Barnes Defense
1. e4 f6
e2e4 f7f6
rnbqkbnr/ppppp1pp/5p2/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -

B00 Borg Defense
1. e4 g5
e2e4 g7g5
rnbqkbnr/pppppp1p/8/6p1/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -

B00 Borg Defense: Borg Gambit
1. e4 g5 2. d4 Bg7
e2e4 g7g5 d2d4 f8g7
rnbqk1nr/ppppppbp/8/6p1/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -

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

B00 Borg Defense: Zilbermints Gambit
1. e4 g5 2. d4 e5
e2e4 g7g5 d2d4 e7e5
rnbqkbnr/pppp1p1p/8/4p1p1/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -

B00 Carr Defense
1. e4 h6
e2e4 h7h6
rnbqkbnr/ppppppp1/7p/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -

B00 Carr Defense: Zilbermints Gambit
1. e4 h6 2. d4 e5
e2e4 h7h6 d2d4 e7e5
rnbqkbnr/pppp1pp1/7p/4p3/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -

B00 Duras Gambit
1. e4 f5
e2e4 f7f5
rnbqkbnr/ppppp1pp/8/5p2/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -

B00 Fried Fox Defense
1. e4 f6 2. d4 Kf7
e2e4 f7f6 d2d4 e8f7
rnbq1bnr/pppppkpp/5p2/8/3PP3/8/PPP2PPP/RNBQKBNR w KQ -

B00 Goldsmith Defense
1. e4 h5
e2e4 h7h5
rnbqkbnr/ppppppp1/8/7p/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -

B00 Goldsmith Defense: Picklepuss Defense
1. e4 h5 2. d4 Nf6
e2e4 h7h5 d2d4 g8f6
rnbqkb1r/ppppppp1/5n2/7p/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -

B00 Guatemala Defense
1. e4 b6 2. d4 Ba6
e2e4 b7b6 d2d4 c8a6
rn1qkbnr/p1pppppp/bp6/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -

B00 Hippopotamus Defense
1. e4 Nh6
e2e4 g8h6
rnbqkb1r/pppppppp/7n/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -

B00 Hippopotamus Defense
1. e4 Nh6 2. d4 g6 3. c4 f6
e2e4 g8h6 d2d4 g7g6 c2c4 f7f6
rnbqkb1r/ppppp2p/5ppn/8/2PPP3/8/PP3PPP/RNBQKBNR w KQkq -

B00 King's Pawn Game
1. e4
e2e4
rnbqkbnr/pppppppp/8/8/4P3/8/PPPP1PPP/RNBQKBNR b KQkq -

B00 Lemming Defense
1. e4 Na6
e2e4 b8a6
r1bqkbnr/pppppppp/n7/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -

B00 Lion Defense: Lion's Jaw
1. e4 d6 2. d4 Nf6 3. f3
e2e4 d7d6 d2d4 g8f6 f2f3
rnbqkb1r/ppp1pppp/3p1n2/8/3PP3/5P2/PPP3PP/RNBQKBNR b KQkq -

B00 Nimzowitsch Defense
1. e4 Nc6
e2e4 b8c6
r1bqkbnr/pppppppp/2n5/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -

B00 Nimzowitsch Defense
1. e4 Nc6 2. d4
e2e4 b8c6 d2d4
r1bqkbnr/pppppppp/2n5/8/3PP3/8/PPP2PPP/RNBQKBNR b KQkq -

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

B00 Nimzowitsch Defense: Colorado Countergambit
1. e4 Nc6 2. Nf3 f5
e2e4 b8c6 g1f3 f7f5
r1bqkbnr/ppppp1pp/2n5/5p2/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -

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

B00 Nimzowitsch Defense: Declined Variation
1. e4 Nc6 2. Nf3
e2e4 b8c6 g1f3
r1bqkbnr/pppppppp/2n5/8/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq -

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

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

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

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

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

B00 Nimzowitsch Defense: French Connection
1. e4 Nc6 2. Nc3 e6
e2e4 b8c6 b1c3 e7e6
r1bqkbnr/pppp1ppp/2n1p3/8/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -

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

B00 Nimzowitsch Defense: Kennedy Variation
1. e4 Nc6 2. d4 e5
e2e4 b8c6 d2d4 e7e5
r1bqkbnr/pppp1ppp/2n5/4p3/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -

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

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

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

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

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

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

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

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

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

B00 Nimzowitsch Defense: Mikenas Variation
1. e4 Nc6 2. d4 d6
e2e4 b8c6 d2d4 d7d6
r1bqkbnr/ppp1pppp/2np4/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -

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

B00 Nimzowitsch Defense: Pirc Connection
1. e4 Nc6 2. Nc3 g6
e2e4 b8c6 b1c3 g7g6
r1bqkbnr/pppppp1p/2n3p1/8/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -

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

B00 Nimzowitsch Defense: Scandinavian Variation
1. e4 Nc6 2. d4 d5
e2e4 b8c6 d2d4 d7d5
r1bqkbnr/ppp1pppp/2n5/3p4/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -

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

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

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

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

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

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

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

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

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

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

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

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

B00 Nimzowitsch Defense: Wheeler Gambit
1. e4 Nc6 2. b4
e2e4 b8c6 b2b4
r1bqkbnr/pppppppp/2n5/8/1P2P3/8/P1PP1PPP/RNBQKBNR b KQkq -

B00 Nimzowitsch Defense: Williams Variation
1. e4 Nc6 2. Nf3 d6
e2e4 b8c6 g1f3 d7d6
r1bqkbnr/ppp1pppp/2np4/8/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -

B00 Nimzowitsch Defense: Woodchuck Variation
1. e4 Nc6 2. d4 a6
e2e4 b8c6 d2d4 a7a6
r1bqkbnr/1ppppppp/p1n5/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -

B00 Owen Defense
1. e4 b6
e2e4 b7b6
rnbqkbnr/p1pppppp/1p6/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -

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

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

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

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

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

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

B00 Pirc Defense
1. e4 d6
e2e4 d7d6
rnbqkbnr/ppp1pppp/3p4/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -

B00 Pirc Defense
1. e4 d6 2. d4
e2e4 d7d6 d2d4
rnbqkbnr/ppp1pppp/3p4/8/3PP3/8/PPP2PPP/RNBQKBNR b KQkq -

B00 Pirc Defense
1. e4 d6 2. d4 Nf6
e2e4 d7d6 d2d4 g8f6
rnbqkb1r/ppp1pppp/3p1n2/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -

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

B00 Rat Defense: Antal Defense
1. e4 d6 2. d4 Nd7
e2e4 d7d6 d2d4 b8d7
r1bqkbnr/pppnpppp/3p4/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -

B00 Rat Defense: Fuller Gambit
1. e4 d6 2. f4 d5 3. exd5 Nf6
e2e4 d7d6 f2f4 d6d5 e4d5 g8f6
rnbqkb1r/ppp1pppp/5n2/3P4/5P2/8/PPPP2PP/RNBQKBNR w KQkq -

B00 Rat Defense: Harmonist
1. e4 d6 2. f4
e2e4 d7d6 f2f4
rnbqkbnr/ppp1pppp/3p4/8/4PP2/8/PPPP2PP/RNBQKBNR b KQkq -

B00 Rat Defense: Petruccioli Attack
1. e4 d6 2. h4
e2e4 d7d6 h2h4
rnbqkbnr/ppp1pppp/3p4/8/4P2P/8/PPPP1PP1/RNBQKBNR b KQkq -

B00 Rat Defense: Spike Attack
1. e4 d6 2. g4
e2e4 d7d6 g2g4
rnbqkbnr/ppp1pppp/3p4/8/4P1P1/8/PPPP1P1P/RNBQKBNR b KQkq -

B00 St. George Defense
1. e4 a6
e2e4 a7a6
rnbqkbnr/1ppppppp/p7/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -

B00 St. George Defense: Polish Variation
1. e4 a6 2. d4 b5 3. Nf3 Bb7 4. Bd3 e6
e2e4 a7a6 d2d4 b7b5 g1f3 c8b7 f1d3 e7e6
rn1qkbnr/1bpp1ppp/p3p3/1p6/3PP3/3B1N2/PPP2PPP/RNBQK2R w KQkq -

B00 St. George Defense: San Jorge Variation
1. e4 a6 2. d4 b5 3. Nf3 Bb7 4. Bd3 d6 5. O-O g6 6. c3 Bg7
e2e4 a7a6 d2d4 b7b5 g1f3 c8b7 f1d3 d7d6 e1g1 g7g6 c2c3 f8g7
rn1qk1nr/1bp1ppbp/p2p2p1/1p6/3PP3/2PB1N2/PP3PPP/RNBQ1RK1 w kq -

B00 St. George Defense: Zilbermints Gambit
1. e4 a6 2. d4 e5
e2e4 a7a6 d2d4 e7e5
rnbqkbnr/1ppp1ppp/p7/4p3/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -

B00 Van Geet Opening: Berlin Gambit
1. e4 Nc6 2. d4 d5 3. Nc3 dxe4 4. d5
e2e4 b8c6 d2d4 d7d5 b1c3 d5e4 d4d5
r1bqkbnr/ppp1pppp/2n5/3P4/4p3/2N5/PPP2PPP/R1BQKBNR b KQkq -

B00 Ware Defense
1. e4 a5
e2e4 a7a5
rnbqkbnr/1ppppppp/8/p7/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -

B00 Ware Defense: Snagglepuss Defense
1. e4 a5 2. d4 Nc6
e2e4 a7a5 d2d4 b8c6
r1bqkbnr/1ppppppp/2n5/p7/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -

B01 Scandinavian Defense
1. e4 d5
e2e4 d7d5
rnbqkbnr/ppp1pppp/8/3p4/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -

B01 Scandinavian Defense
1. e4 d5 2. b3
e2e4 d7d5 b2b3
rnbqkbnr/ppp1pppp/8/3p4/4P3/1P6/P1PP1PPP/RNBQKBNR b KQkq -

B01 Scandinavian Defense: Anderssen Counterattack
1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 e5
e2e4 d7d5 e4d5 d8d5 b1c3 d5a5 d2d4 e7e5
rnb1kbnr/ppp2ppp/8/q3p3/3P4/2N5/PPP2PPP/R1BQKBNR w KQkq -

B01 Scandinavian Defense: Anderssen Counterattack, Collijn Variation
1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 e5 5. Nf3 Bg4
e2e4 d7d5 e4d5 d8d5 b1c3 d5a5 d2d4 e7e5 g1f3 c8g4
rn2kbnr/ppp2ppp/8/q3p3/3P2b1/2N2N2/PPP2PPP/R1BQKB1R w KQkq -

B01 Scandinavian Defense: Anderssen Counterattack, Goteborg System
1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 e5 5. Nf3
e2e4 d7d5 e4d5 d8d5 b1c3 d5a5 d2d4 e7e5 g1f3
rnb1kbnr/ppp2ppp/8/q3p3/3P4/2N2N2/PPP2PPP/R1BQKB1R b KQkq -

B01 Scandinavian Defense: Anderssen Counterattack, Orthodox Attack
1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 e5 5. dxe5 Nc6 6. Nf3 Bb4 7. Bd2
e2e4 d7d5 e4d5 d8d5 b1c3 d5a5 d2d4 e7e5 d4e5 b8c6 g1f3 f8b4 c1d2
r1b1k1nr/ppp2ppp/2n5/q3P3/1b6/2N2N2/PPPB1PPP/R2QKB1R b KQkq -

B01 Scandinavian Defense: Blackburne Gambit
1. e4 d5 2. exd5 c6 3. dxc6 Nxc6
e2e4 d7d5 e4d5 c7c6 d5c6 b8c6
r1bqkbnr/pp2pppp/2n5/8/8/8/PPPP1PPP/RNBQKBNR w KQkq -

B01 Scandinavian Defense: Blackburne-Kloosterboer Gambit
1. e4 d5 2. exd5 c6
e2e4 d7d5 e4d5 c7c6
rnbqkbnr/pp2pppp/2p5/3P4/8/8/PPPP1PPP/RNBQKBNR w KQkq -

B01 Scandinavian Defense: Boehnke Gambit
1. e4 d5 2. exd5 e5 3. dxe6 Bxe6
e2e4 d7d5 e4d5 e7e5 d5e6 c8e6
rn1qkbnr/ppp2ppp/4b3/8/8/8/PPPP1PPP/RNBQKBNR w KQkq -

B01 Scandinavian Defense: Bronstein Variation
1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd6 4. d4 Nf6 5. Nf3 a6
e2e4 d7d5 e4d5 d8d5 b1c3 d5d6 d2d4 g8f6 g1f3 a7a6
rnb1kb1r/1pp1pppp/p2q1n2/8/3P4/2N2N2/PPP2PPP/R1BQKB1R w KQkq -

B01 Scandinavian Defense: Classical Variation
1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Nf3 Bf5
e2e4 d7d5 e4d5 d8d5 b1c3 d5a5 d2d4 g8f6 g1f3 c8f5
rn2kb1r/ppp1pppp/5n2/q4b2/3P4/2N2N2/PPP2PPP/R1BQKB1R w KQkq -

B01 Scandinavian Defense: Grünfeld Variation
1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Nf3 Bf5 6. Ne5 c6 7. g4
e2e4 d7d5 e4d5 d8d5 b1c3 d5a5 d2d4 g8f6 g1f3 c8f5 f3e5 c7c6 g2g4
rn2kb1r/pp2pppp/2p2n2/q3Nb2/3P2P1/2N5/PPP2P1P/R1BQKB1R b KQkq -

B01 Scandinavian Defense: Gubinsky-Melts Defense
1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd6
e2e4 d7d5 e4d5 d8d5 b1c3 d5d6
rnb1kbnr/ppp1pppp/3q4/8/8/2N5/PPPP1PPP/R1BQKBNR w KQkq -

B01 Scandinavian Defense: Icelandic-Palme Gambit
1. e4 d5 2. exd5 Nf6 3. c4 e6
e2e4 d7d5 e4d5 g8f6 c2c4 e7e6
rnbqkb1r/ppp2ppp/4pn2/3P4/2P5/8/PP1P1PPP/RNBQKBNR w KQkq -

B01 Scandinavian Defense: Kiel Variation
1. e4 d5 2. exd5 Nf6 3. d4 Nxd5 4. c4 Nb4
e2e4 d7d5 e4d5 g8f6 d2d4 f6d5 c2c4 d5b4
rnbqkb1r/ppp1pppp/8/8/1nPP4/8/PP3PPP/RNBQKBNR w KQkq -

B01 Scandinavian Defense: Kloosterboer Gambit
1. e4 d5 2. exd5 c6 3. dxc6 e5
e2e4 d7d5 e4d5 c7c6 d5c6 e7e5
rnbqkbnr/pp3ppp/2P5/4p3/8/8/PPPP1PPP/RNBQKBNR w KQkq -

B01 Scandinavian Defense: Kádas Gambit
1. e4 d5 2. exd5 Nf6 3. d4 c6 4. dxc6 e5
e2e4 d7d5 e4d5 g8f6 d2d4 c7c6 d5c6 e7e5
rnbqkb1r/pp3ppp/2P2n2/4p3/3P4/8/PPP2PPP/RNBQKBNR w KQkq -

B01 Scandinavian Defense: Lasker Variation
1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Nf3 Bg4 6. h3
e2e4 d7d5 e4d5 d8d5 b1c3 d5a5 d2d4 g8f6 g1f3 c8g4 h2h3
rn2kb1r/ppp1pppp/5n2/q7/3P2b1/2N2N1P/PPP2PP1/R1BQKB1R b KQkq -

B01 Scandinavian Defense: Main Line
1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5
e2e4 d7d5 e4d5 d8d5 b1c3 d5a5
rnb1kbnr/ppp1pppp/8/q7/8/2N5/PPPP1PPP/R1BQKBNR w KQkq -

B01 Scandinavian Defense: Main Line, Leonhardt Gambit
1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. b4
e2e4 d7d5 e4d5 d8d5 b1c3 d5a5 b2b4
rnb1kbnr/ppp1pppp/8/q7/1P6/2N5/P1PP1PPP/R1BQKBNR b KQkq -

B01 Scandinavian Defense: Main Line, Mieses Variation
1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6
e2e4 d7d5 e4d5 d8d5 b1c3 d5a5 d2d4 g8f6
rnb1kb1r/ppp1pppp/5n2/q7/3P4/2N5/PPP2PPP/R1BQKBNR w KQkq -

B01 Scandinavian Defense: Marshall Variation
1. e4 d5 2. exd5 Nf6 3. d4 Nxd5
e2e4 d7d5 e4d5 g8f6 d2d4 f6d5
rnbqkb1r/ppp1pppp/8/3n4/3P4/8/PPP2PPP/RNBQKBNR w KQkq -

B01 Scandinavian Defense: Mieses-Kotroc Variation
1. e4 d5 2. exd5 Qxd5
e2e4 d7d5 e4d5 d8d5
rnb1kbnr/ppp1pppp/8/3q4/8/8/PPPP1PPP/RNBQKBNR w KQkq -

B01 Scandinavian Defense: Modern Variation
1. e4 d5 2. exd5 Nf6
e2e4 d7d5 e4d5 g8f6
rnbqkb1r/ppp1pppp/5n2/3P4/8/8/PPPP1PPP/RNBQKBNR w KQkq -

B01 Scandinavian Defense: Modern Variation
1. e4 d5 2. exd5 Nf6 3. d4
e2e4 d7d5 e4d5 g8f6 d2d4
rnbqkb1r/ppp1pppp/5n2/3P4/3P4/8/PPP2PPP/RNBQKBNR b KQkq -

B01 Scandinavian Defense: Modern Variation, Gipslis Variation
1. e4 d5 2. exd5 Nf6 3. d4 Nxd5 4. Nf3 Bg4
e2e4 d7d5 e4d5 g8f6 d2d4 f6d5 g1f3 c8g4
rn1qkb1r/ppp1pppp/8/3n4/3P2b1/5N2/PPP2PPP/RNBQKB1R w KQkq -

B01 Scandinavian Defense: Modern Variation, Wing Gambit
1. e4 d5 2. exd5 Nf6 3. d4 g6 4. c4 b5
e2e4 d7d5 e4d5 g8f6 d2d4 g7g6 c2c4 b7b5
rnbqkb1r/p1p1pp1p/5np1/1p1P4/2PP4/8/PP3PPP/RNBQKBNR w KQkq -

B01 Scandinavian Defense: Panov Transfer
1. e4 d5 2. exd5 Nf6 3. c4 c6
e2e4 d7d5 e4d5 g8f6 c2c4 c7c6
rnbqkb1r/pp2pppp/2p2n2/3P4/2P5/8/PP1P1PPP/RNBQKBNR w KQkq -

B01 Scandinavian Defense: Portuguese Gambit
1. e4 d5 2. exd5 Nf6 3. d4 Bg4
e2e4 d7d5 e4d5 g8f6 d2d4 c8g4
rn1qkb1r/ppp1pppp/5n2/3P4/3P2b1/8/PPP2PPP/RNBQKBNR w KQkq -

B01 Scandinavian Defense: Portuguese Gambit, Banker Variation
1. e4 d5 2. exd5 Nf6 3. d4 Bg4 4. f3 Bf5 5. c4
e2e4 d7d5 e4d5 g8f6 d2d4 c8g4 f2f3 g4f5 c2c4
rn1qkb1r/ppp1pppp/5n2/3P1b2/2PP4/5P2/PP4PP/RNBQKBNR b KQkq -

B01 Scandinavian Defense: Portuguese Gambit, Classical Variation
1. e4 d5 2. exd5 Nf6 3. d4 Bg4 4. Nf3
e2e4 d7d5 e4d5 g8f6 d2d4 c8g4 g1f3
rn1qkb1r/ppp1pppp/5n2/3P4/3P2b1/5N2/PPP2PPP/RNBQKB1R b KQkq -

B01 Scandinavian Defense: Portuguese Gambit, Correspondence Refutation
1. e4 d5 2. exd5 Nf6 3. d4 Bg4 4. f3 Bf5 5. g4
e2e4 d7d5 e4d5 g8f6 d2d4 c8g4 f2f3 g4f5 g2g4
rn1qkb1r/ppp1pppp/5n2/3P1b2/3P2P1/5P2/PPP4P/RNBQKBNR b KQkq -

B01 Scandinavian Defense: Portuguese Gambit, Elbow Variation
1. e4 d5 2. exd5 Nf6 3. d4 Bg4 4. Bb5+ c6
e2e4 d7d5 e4d5 g8f6 d2d4 c8g4 f1b5 c7c6
rn1qkb1r/pp2pppp/2p2n2/1B1P4/3P2b1/8/PPP2PPP/RNBQK1NR w KQkq -

B01 Scandinavian Defense: Portuguese Gambit, Jadoul Variation
1. e4 d5 2. exd5 Nf6 3. d4 Bg4 4. f3 Bf5 5. Bb5+ Nbd7 6. c4
e2e4 d7d5 e4d5 g8f6 d2d4 c8g4 f2f3 g4f5 f1b5 b8d7 c2c4
r2qkb1r/pppnpppp/5n2/1B1P1b2/2PP4/5P2/PP4PP/RNBQK1NR b KQkq -

B01 Scandinavian Defense: Portuguese Gambit, Lusophobe Variation
1. e4 d5 2. exd5 Nf6 3. d4 Bg4 4. Bb5+ Nbd7 5. Be2
e2e4 d7d5 e4d5 g8f6 d2d4 c8g4 f1b5 b8d7 b5e2
r2qkb1r/pppnpppp/5n2/3P4/3P2b1/8/PPP1BPPP/RNBQK1NR b KQkq -

B01 Scandinavian Defense: Portuguese Gambit, Melbourne Shuffle Variation
1. e4 d5 2. exd5 Nf6 3. d4 Bg4 4. f3 Bf5 5. Bb5+ Nbd7 6. Nc3
e2e4 d7d5 e4d5 g8f6 d2d4 c8g4 f2f3 g4f5 f1b5 b8d7 b1c3
r2qkb1r/pppnpppp/5n2/1B1P1b2/3P4/2N2P2/PPP3PP/R1BQK1NR b KQkq -

B01 Scandinavian Defense: Portuguese Gambit, Wuss Variation
1. e4 d5 2. exd5 Nf6 3. d4 Bg4 4. Be2
e2e4 d7d5 e4d5 g8f6 d2d4 c8g4 f1e2
rn1qkb1r/ppp1pppp/5n2/3P4/3P2b1/8/PPP1BPPP/RNBQK1NR b KQkq -

B01 Scandinavian Defense: Richter Variation
1. e4 d5 2. exd5 Nf6 3. d4 Nxd5 4. Nf3 g6
e2e4 d7d5 e4d5 g8f6 d2d4 f6d5 g1f3 g7g6
rnbqkb1r/ppp1pp1p/6p1/3n4/3P4/5N2/PPP2PPP/RNBQKB1R w KQkq -

B01 Scandinavian Defense: Richter Variation
1. e4 d5 2. exd5 Nf6 3. d4 g6
e2e4 d7d5 e4d5 g8f6 d2d4 g7g6
rnbqkb1r/ppp1pp1p/5np1/3P4/3P4/8/PPP2PPP/RNBQKBNR w KQkq -

B01 Scandinavian Defense: Schiller-Pytel Variation
1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd6 4. d4 c6
e2e4 d7d5 e4d5 d8d5 b1c3 d5d6 d2d4 c7c6
rnb1kbnr/pp2pppp/2pq4/8/3P4/2N5/PPP2PPP/R1BQKBNR w KQkq -

B01 Scandinavian Defense: Schiller-Pytel Variation, Modern Variation
1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd6 4. d4 Nf6 5. Bc4 c6 6. Nge2 Bf5 7. Bf4 Qb4
e2e4 d7d5 e4d5 d8d5 b1c3 d5d6 d2d4 g8f6 f1c4 c7c6 g1e2 c8f5 c1f4 d6b4
rn2kb1r/pp2pppp/2p2n2/5b2/1qBP1B2/2N5/PPP1NPPP/R2QK2R w KQkq -

B01 Scandinavian Defense: Valencian Variation
1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd8
e2e4 d7d5 e4d5 d8d5 b1c3 d5d8
rnbqkbnr/ppp1pppp/8/8/8/2N5/PPPP1PPP/R1BQKBNR w KQkq -

B01 Scandinavian Defense: Valencian Variation, Ilundain Variation
1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd8 4. d4 Nf6 5. Nf3 c6
e2e4 d7d5 e4d5 d8d5 b1c3 d5d8 d2d4 g8f6 g1f3 c7c6
rnbqkb1r/pp2pppp/2p2n2/8/3P4/2N2N2/PPP2PPP/R1BQKB1R w KQkq -

B01 Scandinavian Defense: Valencian Variation, Main Line
1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd8 4. d4 Nf6 5. Nf3 Bg4
e2e4 d7d5 e4d5 d8d5 b1c3 d5d8 d2d4 g8f6 g1f3 c8g4
rn1qkb1r/ppp1pppp/5n2/8/3P2b1/2N2N2/PPP2PPP/R1BQKB1R w KQkq -

B01 Scandinavian Defense: Zilbermints Gambit
1. e4 d5 2. b4
e2e4 d7d5 b2b4
rnbqkbnr/ppp1pppp/8/3p4/1P2P3/8/P1PP1PPP/RNBQKBNR b KQkq -

B01 Van Geet Opening: Grünfeld Defense
1. e4 d5 2. Nc3 dxe4 3. Nxe4 e5
e2e4 d7d5 b1c3 d5e4 c3e4 e7e5
rnbqkbnr/ppp2ppp/8/4p3/4N3/8/PPPP1PPP/R1BQKBNR w KQkq -

B02 Alekhine Defense
1. e4 Nf6
e2e4 g8f6
rnbqkb1r/pppppppp/5n2/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -

B02 Alekhine Defense: Brooklyn Variation
1. e4 Nf6 2. e5 Ng8
e2e4 g8f6 e4e5 f6g8
rnbqkbnr/pppppppp/8/4P3/8/8/PPPP1PPP/RNBQKBNR w KQkq -

B02 Alekhine Defense: Brooklyn Variation, Everglades Variation
1. e4 Nf6 2. e5 Ng8 3. d4 f5
e2e4 g8f6 e4e5 f6g8 d2d4 f7f5
rnbqkbnr/ppppp1pp/8/4Pp2/3P4/8/PPP2PPP/RNBQKBNR w KQkq f6

B02 Alekhine Defense: Buckley Attack
1. e4 Nf6 2. e5 Nd5 3. Na3
e2e4 g8f6 e4e5 f6d5 b1a3
rnbqkb1r/pppppppp/8/3nP3/8/N7/PPPP1PPP/R1BQKBNR b KQkq -

B02 Alekhine Defense: Hunt Variation, Lasker Simul Gambit
1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. c5 Nd5 5. Bc4 e6 6. Nc3
e2e4 g8f6 e4e5 f6d5 c2c4 d5b6 c4c5 b6d5 f1c4 e7e6 b1c3
rnbqkb1r/pppp1ppp/4p3/2PnP3/2B5/2N5/PP1P1PPP/R1BQK1NR b KQkq -

B02 Alekhine Defense: Hunt Variation, Matsukevich Gambit
1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. c5 Nd5 5. Nc3 Nxc3 6. dxc3 d6 7. Bg5
e2e4 g8f6 e4e5 f6d5 c2c4 d5b6 c4c5 b6d5 b1c3 d5c3 d2c3 d7d6 c1g5
rnbqkb1r/ppp1pppp/3p4/2P1P1B1/8/2P5/PP3PPP/R2QKBNR b KQkq -

B02 Alekhine Defense: Hunt Variation, Mikenas Gambit
1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. c5 Nd5 5. Bc4 e6 6. Nc3 d6 7. Nxd5 exd5 8. Bxd5
e2e4 g8f6 e4e5 f6d5 c2c4 d5b6 c4c5 b6d5 f1c4 e7e6 b1c3 d7d6 c3d5 e6d5 c4d5
rnbqkb1r/ppp2ppp/3p4/2PBP3/8/8/PP1P1PPP/R1BQK1NR b KQkq -

B02 Alekhine Defense: Kmoch Variation
1. e4 Nf6 2. e5 Nd5 3. Bc4 Nb6 4. Bb3 c5 5. d3
e2e4 g8f6 e4e5 f6d5 f1c4 d5b6 c4b3 c7c5 d2d3
rnbqkb1r/pp1ppppp/1n6/2p1P3/8/1B1P4/PPP2PPP/RNBQK1NR b KQkq -

B02 Alekhine Defense: Krejcik Variation
1. e4 Nf6 2. Bc4
e2e4 g8f6 f1c4
rnbqkb1r/pppppppp/5n2/8/2B1P3/8/PPPP1PPP/RNBQK1NR b KQkq -

B02 Alekhine Defense: Krejcik Variation, Krejcik Gambit
1. e4 Nf6 2. Bc4 Nxe4 3. Bxf7+
e2e4 g8f6 f1c4 f6e4 c4f7
rnbqkb1r/pppppBpp/8/8/4n3/8/PPPP1PPP/RNBQK1NR b KQkq -

B02 Alekhine Defense: Maróczy Variation
1. e4 Nf6 2. d3
e2e4 g8f6 d2d3
rnbqkb1r/pppppppp/5n2/8/4P3/3P4/PPP2PPP/RNBQKBNR b KQkq -

B02 Alekhine Defense: Mokele Mbembe
1. e4 Nf6 2. e5 Ne4
e2e4 g8f6 e4e5 f6e4
rnbqkb1r/pppppppp/8/4P3/4n3/8/PPPP1PPP/RNBQKBNR w KQkq -

B02 Alekhine Defense: Mokele Mbembe, Modern Line
1. e4 Nf6 2. e5 Ne4 3. d4 f6
e2e4 g8f6 e4e5 f6e4 d2d4 f7f6
rnbqkb1r/ppppp1pp/5p2/4P3/3Pn3/8/PPP2PPP/RNBQKBNR w KQkq -

B02 Alekhine Defense: Mokele Mbembe, Vavra Defense
1. e4 Nf6 2. e5 Ne4 3. d4 e6
e2e4 g8f6 e4e5 f6e4 d2d4 e7e6
rnbqkb1r/pppp1ppp/4p3/4P3/3Pn3/8/PPP2PPP/RNBQKBNR w KQkq -

B02 Alekhine Defense: Normal Variation
1. e4 Nf6 2. e5 Nd5
e2e4 g8f6 e4e5 f6d5
rnbqkb1r/pppppppp/8/3nP3/8/8/PPPP1PPP/RNBQKBNR w KQkq -

B02 Alekhine Defense: Scandinavian Variation
1. e4 Nf6 2. Nc3 d5
e2e4 g8f6 b1c3 d7d5
rnbqkb1r/ppp1pppp/5n2/3p4/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -

B02 Alekhine Defense: Scandinavian Variation, Geschev Gambit
1. e4 Nf6 2. Nc3 d5 3. exd5 c6
e2e4 g8f6 b1c3 d7d5 e4d5 c7c6
rnbqkb1r/pp2pppp/2p2n2/3P4/8/2N5/PPPP1PPP/R1BQKBNR w KQkq -

B02 Alekhine Defense: Scandinavian Variation, Myers Gambit
1. e4 Nf6 2. Nc3 d5 3. d3 dxe4 4. Bg5
e2e4 g8f6 b1c3 d7d5 d2d3 d5e4 c1g5
rnbqkb1r/ppp1pppp/5n2/6B1/4p3/2NP4/PPP2PPP/R2QKBNR b KQkq -

B02 Alekhine Defense: Spielmann Gambit
1. e4 Nf6 2. Nc3 d5 3. e5 Nfd7 4. e6
e2e4 g8f6 b1c3 d7d5 e4e5 f6d7 e5e6
rnbqkb1r/pppnpppp/4P3/3p4/8/2N5/PPPP1PPP/R1BQKBNR b KQkq -

B02 Alekhine Defense: Steiner Variation
1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. b3
e2e4 g8f6 e4e5 f6d5 c2c4 d5b6 b2b3
rnbqkb1r/pppppppp/1n6/4P3/2P5/1P6/P2P1PPP/RNBQKBNR b KQkq -

B02 Alekhine Defense: Sämisch Attack
1. e4 Nf6 2. e5 Nd5 3. Nc3
e2e4 g8f6 e4e5 f6d5 b1c3
rnbqkb1r/pppppppp/8/3nP3/8/2N5/PPPP1PPP/R1BQKBNR b KQkq -

B02 Alekhine Defense: The Squirrel
1. e4 Nf6 2. e5 Nd5 3. c4 Nf4
e2e4 g8f6 e4e5 f6d5 c2c4 d5f4
rnbqkb1r/pppppppp/8/4P3/2P2n2/8/PP1P1PPP/RNBQKBNR w KQkq -

B02 Alekhine Defense: Two Pawns Attack
1. e4 Nf6 2. e5 Nd5 3. c4
e2e4 g8f6 e4e5 f6d5 c2c4
rnbqkb1r/pppppppp/8/3nP3/2P5/8/PP1P1PPP/RNBQKBNR b KQkq -

B02 Alekhine Defense: Two Pawns Attack, Lasker Variation
1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. c5
e2e4 g8f6 e4e5 f6d5 c2c4 d5b6 c4c5
rnbqkb1r/pppppppp/1n6/2P1P3/8/8/PP1P1PPP/RNBQKBNR b KQkq -

B02 Alekhine Defense: Two Pawns Attack, Mikenas Variation
1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. c5 Nd5 5. Bc4 e6 6. Nc3 d6
e2e4 g8f6 e4e5 f6d5 c2c4 d5b6 c4c5 b6d5 f1c4 e7e6 b1c3 d7d6
rnbqkb1r/ppp2ppp/3pp3/2PnP3/2B5/2N5/PP1P1PPP/R1BQK1NR w KQkq -

B02 Alekhine Defense: Two Pawns Attack, Tate Variation
1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. a4
e2e4 g8f6 e4e5 f6d5 c2c4 d5b6 a2a4
rnbqkb1r/pppppppp/1n6/4P3/P1P5/8/1P1P1PPP/RNBQKBNR b KQkq -

B02 Alekhine Defense: Welling Variation
1. e4 Nf6 2. e5 Nd5 3. b3
e2e4 g8f6 e4e5 f6d5 b2b3
rnbqkb1r/pppppppp/8/3nP3/8/1P6/P1PP1PPP/RNBQKBNR b KQkq -

B03 Alekhine Defense
1. e4 Nf6 2. e5 Nd5 3. d4
e2e4 g8f6 e4e5 f6d5 d2d4
rnbqkb1r/pppppppp/8/3nP3/3P4/8/PPP2PPP/RNBQKBNR b KQkq -

B03 Alekhine Defense
1. e4 Nf6 2. e5 Nd5 3. d4 d6
e2e4 g8f6 e4e5 f6d5 d2d4 d7d6
rnbqkb1r/ppp1pppp/3p4/3nP3/3P4/8/PPP2PPP/RNBQKBNR w KQkq -

B03 Alekhine Defense
1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4
e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4
rnbqkb1r/ppp1pppp/3p4/3nP3/2PP4/8/PP3PPP/RNBQKBNR b KQkq -

B03 Alekhine Defense: Balogh Variation
1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Bc4
e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 f1c4
rnbqkb1r/ppp1pppp/3p4/3nP3/2BP4/8/PPP2PPP/RNBQK1NR b KQkq -

B03 Alekhine Defense: Exchange Variation
1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. exd6
e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 e5d6
rnbqkb1r/ppp1pppp/1n1P4/8/2PP4/8/PP3PPP/RNBQKBNR b KQkq -

B03 Alekhine Defense: Exchange Variation, Karpov Variation
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
e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 e5d6 c7d6 b1c3 g7g6 h2h3 f8g7 g1f3 e8g8 f1e2 b8c6 e1g1 c8f5 c1f4
r2q1rk1/pp2ppbp/1nnp2p1/5b2/2PP1B2/2N2N1P/PP2BPP1/R2Q1RK1 b - -

B03 Alekhine Defense: Exchange Variation, Voronezh Variation
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
e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 e5d6 c7d6 b1c3 g7g6 c1e3 f8g7 a1c1 e8g8 b2b3
rnbq1rk1/pp2ppbp/1n1p2p1/8/2PP4/1PN1B3/P4PPP/2RQKBNR b K -

B03 Alekhine Defense: Four Pawns Attack
1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4
e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 f2f4
rnbqkb1r/ppp1pppp/1n1p4/4P3/2PP1P2/8/PP4PP/RNBQKBNR b KQkq -

B03 Alekhine Defense: Four Pawns Attack, Cambridge Gambit
1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 g5
e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 f2f4 g7g5
rnbqkb1r/ppp1pp1p/1n1p4/4P1p1/2PP1P2/8/PP4PP/RNBQKBNR w KQkq -

B03 Alekhine Defense: Four Pawns Attack, Fianchetto Variation
1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 g6
e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 f2f4 g7g6
rnbqkb1r/ppp1pp1p/1n1p2p1/4P3/2PP1P2/8/PP4PP/RNBQKBNR w KQkq -

B03 Alekhine Defense: Four Pawns Attack, Ilyin-Zhenevsky Variation
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
e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 f2f4 d6e5 f4e5 b8c6 g1f3 c8g4 e5e6 f7e6 c4c5
r2qkb1r/ppp1p1pp/1nn1p3/2P5/3P2b1/5N2/PP4PP/RNBQKB1R b KQkq -

B03 Alekhine Defense: Four Pawns Attack, Korchnoi Variation
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
e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 f2f4 d6e5 f4e5 c8f5 b1c3 e7e6 g1f3 f8e7 f1e2 e8g8 e1g1 f7f6
rn1q1rk1/ppp1b1pp/1n2pp2/4Pb2/2PP4/2N2N2/PP2B1PP/R1BQ1RK1 w - -

B03 Alekhine Defense: Four Pawns Attack, Main Line
1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 dxe5 6. fxe5 Nc6 7. Be3
e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 f2f4 d6e5 f4e5 b8c6 c1e3
r1bqkb1r/ppp1pppp/1nn5/4P3/2PP4/4B3/PP4PP/RN1QKBNR b KQkq -

B03 Alekhine Defense: Four Pawns Attack, Tartakower Variation
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
e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 f2f4 d6e5 f4e5 b8c6 c1e3 c8f5 b1c3 e7e6 g1f3 d8d7 f1e2 e8c8 e1g1 f8e7
2kr3r/pppqbppp/1nn1p3/4Pb2/2PP4/2N1BN2/PP2B1PP/R2Q1RK1 w - -

B03 Alekhine Defense: Four Pawns Attack, Trifunovic Variation
1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 Bf5
e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 f2f4 c8f5
rn1qkb1r/ppp1pppp/1n1p4/4Pb2/2PP1P2/8/PP4PP/RNBQKBNR w KQkq -

B03 Alekhine Defense: Hunt Variation
1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. c5
e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 c4c5
rnbqkb1r/ppp1pppp/1n1p4/2P1P3/3P4/8/PP3PPP/RNBQKBNR b KQkq -

B03 Alekhine Defense: Modern Variation, Alekhine Gambit
1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. Nf3 Bg4 6. Be2
e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 g1f3 c8g4 f1e2
rn1qkb1r/ppp1pppp/1n1p4/4P3/2PP2b1/5N2/PP2BPPP/RNBQK2R b KQkq -

B03 Alekhine Defense: O'Sullivan Gambit
1. e4 Nf6 2. e5 Nd5 3. d4 b5
e2e4 g8f6 e4e5 f6d5 d2d4 b7b5
rnbqkb1r/p1pppppp/8/1p1nP3/3P4/8/PPP2PPP/RNBQKBNR w KQkq -

B04 Alekhine Defense: Modern Variation
1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3
e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 g1f3
rnbqkb1r/ppp1pppp/3p4/3nP3/3P4/5N2/PPP2PPP/RNBQKB1R b KQkq -

B04 Alekhine Defense: Modern Variation, Alburt Variation
1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 g6
e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 g1f3 g7g6
rnbqkb1r/ppp1pp1p/3p2p1/3nP3/3P4/5N2/PPP2PPP/RNBQKB1R w KQkq -

B04 Alekhine Defense: Modern Variation, Keres Variation
1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 g6 5. Bc4 Nb6 6. Bb3 Bg7 7. a4
e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 g1f3 g7g6 f1c4 d5b6 c4b3 f8g7 a2a4
rnbqk2r/ppp1ppbp/1n1p2p1/4P3/P2P4/1B3N2/1PP2PPP/RNBQK2R b KQkq -

B04 Alekhine Defense: Modern Variation, Larsen Variation
1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 dxe5
e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 g1f3 d6e5
rnbqkb1r/ppp1pppp/8/3np3/3P4/5N2/PPP2PPP/RNBQKB1R w KQkq -

B04 Alekhine Defense: Modern Variation, Larsen-Haakert Variation
1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Nc6
e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 g1f3 b8c6
r1bqkb1r/ppp1pppp/2np4/3nP3/3P4/5N2/PPP2PPP/RNBQKB1R w KQkq -

B04 Alekhine Defense: Modern Variation, Schmid Variation
1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Nb6
e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 g1f3 d5b6
rnbqkb1r/ppp1pppp/1n1p4/4P3/3P4/5N2/PPP2PPP/RNBQKB1R w KQkq -

B05 Alekhine Defense: Modern Variation, Alekhine Variation
1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4 5. c4
e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 g1f3 c8g4 c2c4
rn1qkb1r/ppp1pppp/3p4/3nP3/2PP2b1/5N2/PP3PPP/RNBQKB1R b KQkq -

B05 Alekhine Defense: Modern Variation, Flohr Variation
1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4 5. Be2 c6
e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 g1f3 c8g4 f1e2 c7c6
rn1qkb1r/pp2pppp/2pp4/3nP3/3P2b1/5N2/PPP1BPPP/RNBQK2R w KQkq -

B05 Alekhine Defense: Modern Variation, Main Line
1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4
e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 g1f3 c8g4
rn1qkb1r/ppp1pppp/3p4/3nP3/3P2b1/5N2/PPP2PPP/RNBQKB1R w KQkq -

B05 Alekhine Defense: Modern Variation, Panov Variation
1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4 5. h3
e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 g1f3 c8g4 h2h3
rn1qkb1r/ppp1pppp/3p4/3nP3/3P2b1/5N1P/PPP2PP1/RNBQKB1R b KQkq -

B05 Alekhine Defense: Modern Variation, Vitolins Attack
1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4 5. c4 Nb6 6. d5
e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 g1f3 c8g4 c2c4 d5b6 d4d5
rn1qkb1r/ppp1pppp/1n1p4/3PP3/2P3b1/5N2/PP3PPP/RNBQKB1R b KQkq -

B06 Modern Defense
1. e4 g6
e2e4 g7g6
rnbqkbnr/pppppp1p/6p1/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -

B06 Modern Defense
1. e4 g6 2. d4 Bg7
e2e4 g7g6 d2d4 f8g7
rnbqk1nr/ppppppbp/6p1/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -

B06 Modern Defense: Anti-Modern
1. e4 g6 2. d4 Bg7 3. Nc3 c6 4. Bc4 d6 5. Qe2
e2e4 g7g6 d2d4 f8g7 b1c3 c7c6 f1c4 d7d6 d1e2
rnbqk1nr/pp2ppbp/2pp2p1/8/2BPP3/2N5/PPP1QPPP/R1B1K1NR b KQkq -

B06 Modern Defense: Bishop Attack
1. e4 g6 2. d4 Bg7 3. Bc4
e2e4 g7g6 d2d4 f8g7 f1c4
rnbqk1nr/ppppppbp/6p1/8/2BPP3/8/PPP2PPP/RNBQK1NR b KQkq -

B06 Modern Defense: Bishop Attack, Bücker Gambit
1. e4 g6 2. d4 Bg7 3. Bc4 b5
e2e4 g7g6 d2d4 f8g7 f1c4 b7b5
rnbqk1nr/p1ppppbp/6p1/1p6/2BPP3/8/PPP2PPP/RNBQK1NR w KQkq -

B06 Modern Defense: Bishop Attack, Monkey's Bum
1. e4 g6 2. Bc4 Bg7 3. Qf3 e6 4. d4 Bxd4
e2e4 g7g6 f1c4 f8g7 d1f3 e7e6 d2d4 g7d4
rnbqk1nr/pppp1p1p/4p1p1/8/2BbP3/5Q2/PPP2PPP/RNB1K1NR w KQkq -

B06 Modern Defense: Dunworthy Variation
1. e4 g6 2. d4 Bg7 3. c4 d5 4. exd5 c6 5. dxc6 Bxd4
e2e4 g7g6 d2d4 f8g7 c2c4 d7d5 e4d5 c7c6 d5c6 g7d4
rnbqk1nr/pp2pp1p/2P3p1/8/2Pb4/8/PP3PPP/RNBQKBNR w KQkq -

B06 Modern Defense: Fianchetto Gambit
1. e4 g6 2. d4 f5
e2e4 g7g6 d2d4 f7f5
rnbqkbnr/ppppp2p/6p1/5p2/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -

B06 Modern Defense: Gurgenidze Defense
1. e4 g6 2. d4 Bg7 3. Nc3 c6 4. f4 d5 5. e5 h5
e2e4 g7g6 d2d4 f8g7 b1c3 c7c6 f2f4 d7d5 e4e5 h7h5
rnbqk1nr/pp2ppb1/2p3p1/3pP2p/3P1P2/2N5/PPP3PP/R1BQKBNR w KQkq -

B06 Modern Defense: Lizard Defense, Mittenberger Gambit
1. e4 g6 2. d4 Bg7 3. Nc3 d5
e2e4 g7g6 d2d4 f8g7 b1c3 d7d5
rnbqk1nr/ppp1ppbp/6p1/3p4/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq -

B06 Modern Defense: Masur Gambit
1. e4 g6 2. d4 Nh6 3. Nc3 f5 4. Bxh6 Bxh6 5. exf5 O-O
e2e4 g7g6 d2d4 g8h6 b1c3 f7f5 c1h6 f8h6 e4f5 e8g8
rnbq1rk1/ppppp2p/6pb/5P2/3P4/2N5/PPP2PPP/R2QKBNR w KQ -

B06 Modern Defense: Modern Pterodactyl
1. e4 g6 2. d4 Bg7 3. Nc3 c5
e2e4 g7g6 d2d4 f8g7 b1c3 c7c5
rnbqk1nr/pp1pppbp/6p1/2p5/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq -

B06 Modern Defense: Mongredien Defense, with Nc3
1. e4 g6 2. d4 Bg7 3. Nc3 b6
e2e4 g7g6 d2d4 f8g7 b1c3 b7b6
rnbqk1nr/p1ppppbp/1p4p1/8/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq -

B06 Modern Defense: Mongredien Defense, with Nf3
1. e4 g6 2. d4 Bg7 3. Nf3 b6
e2e4 g7g6 d2d4 f8g7 g1f3 b7b6
rnbqk1nr/p1ppppbp/1p4p1/8/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq -

B06 Modern Defense: Norwegian Defense
1. e4 g6 2. d4 Nf6
e2e4 g7g6 d2d4 g8f6
rnbqkb1r/pppppp1p/5np1/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -

B06 Modern Defense: Norwegian Defense, Norwegian Gambit
1. e4 g6 2. d4 Nf6 3. e5 Nh5 4. Be2 d6
e2e4 g7g6 d2d4 g8f6 e4e5 f6h5 f1e2 d7d6
rnbqkb1r/ppp1pp1p/3p2p1/4P2n/3P4/8/PPP1BPPP/RNBQK1NR w KQkq -

B06 Modern Defense: Pseudo-Austrian Attack
1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. f4
e2e4 g7g6 d2d4 f8g7 b1c3 d7d6 f2f4
rnbqk1nr/ppp1ppbp/3p2p1/8/3PPP2/2N5/PPP3PP/R1BQKBNR b KQkq -

B06 Modern Defense: Semi-Averbakh Variation, Pterodactyl Variation Declined
1. e4 g6 2. d4 Bg7 3. c4 c5 4. Nf3 d6 5. Be2 Qa5+
e2e4 g7g6 d2d4 f8g7 c2c4 c7c5 g1f3 d7d6 f1e2 d8a5
rnb1k1nr/pp2ppbp/3p2p1/q1p5/2PPP3/5N2/PP2BPPP/RNBQK2R w KQkq -

B06 Modern Defense: Standard Defense
1. e4 g6 2. d4 Bg7 3. Nc3 d6
e2e4 g7g6 d2d4 f8g7 b1c3 d7d6
rnbqk1nr/ppp1ppbp/3p2p1/8/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq -

B06 Modern Defense: Standard Line
1. e4 g6 2. d4 Bg7 3. Nc3
e2e4 g7g6 d2d4 f8g7 b1c3
rnbqk1nr/ppppppbp/6p1/8/3PP3/2N5/PPP2PPP/R1BQKBNR b KQkq -

B06 Modern Defense: Three Pawns Attack
1. e4 g6 2. d4 Bg7 3. f4
e2e4 g7g6 d2d4 f8g7 f2f4
rnbqk1nr/ppppppbp/6p1/8/3PPP2/8/PPP3PP/RNBQKBNR b KQkq -

B06 Modern Defense: Two Knights Variation
1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. Nf3
e2e4 g7g6 d2d4 f8g7 b1c3 d7d6 g1f3
rnbqk1nr/ppp1ppbp/3p2p1/8/3PP3/2N2N2/PPP2PPP/R1BQKB1R b KQkq -

B06 Modern Defense: Two Knights Variation, Suttles Variation
1. e4 g6 2. d4 Bg7 3. Nc3 c6 4. Nf3 d6
e2e4 g7g6 d2d4 f8g7 b1c3 c7c6 g1f3 d7d6
rnbqk1nr/pp2ppbp/2pp2p1/8/3PP3/2N2N2/PPP2PPP/R1BQKB1R w KQkq -

B06 Modern Defense: Two Knights Variation, Suttles Variation, Tal Gambit
1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. Nf3 c6 5. Bg5 Qb6 6. Qd2 Qxb2
e2e4 g7g6 d2d4 f8g7 b1c3 d7d6 g1f3 c7c6 c1g5 d8b6 d1d2 b6b2
rnb1k1nr/pp2ppbp/2pp2p1/6B1/3PP3/2N2N2/PqPQ1PPP/R3KB1R w KQkq -

B06 Modern Defense: Westermann Gambit
1. e4 g6 2. d4 Bg7 3. Bd2
e2e4 g7g6 d2d4 f8g7 c1d2
rnbqk1nr/ppppppbp/6p1/8/3PP3/8/PPPB1PPP/RN1QKBNR b KQkq -

B06 Modern Defense: Wind Gambit
1. e4 g6 2. d4 Bg7 3. Bd3
e2e4 g7g6 d2d4 f8g7 f1d3
rnbqk1nr/ppppppbp/6p1/8/3PP3/3B4/PPP2PPP/RNBQK1NR b KQkq -

B06 Pterodactyl Defense: Austrian, Austriadactylus Western
1. e4 g6 2. d4 Bg7 3. f4 c5 4. Nf3 Qa5+
e2e4 g7g6 d2d4 f8g7 f2f4 c7c5 g1f3 d8a5
rnb1k1nr/pp1pppbp/6p1/q1p5/3PPP2/5N2/PPP3PP/RNBQKB1R w KQkq -

B06 Pterodactyl Defense: Austrian, Grand Prix Pterodactyl
1. e4 g6 2. Nc3 Bg7 3. f4 c5 4. Nf3 Qa5
e2e4 g7g6 b1c3 f8g7 f2f4 c7c5 g1f3 d8a5
rnb1k1nr/pp1pppbp/6p1/q1p5/4PP2/2N2N2/PPPP2PP/R1BQKB1R w KQkq -

B06 Pterodactyl Defense: Austrian, Pteranodon
1. e4 g6 2. d4 Bg7 3. f4 c5 4. c3 Qa5
e2e4 g7g6 d2d4 f8g7 f2f4 c7c5 c2c3 d8a5
rnb1k1nr/pp1pppbp/6p1/q1p5/3PPP2/2P5/PP4PP/RNBQKBNR w KQkq -

B06 Pterodactyl Defense: Central, Anhanguera
1. e4 g6 2. d4 Bg7 3. c4 c5 4. Nc3 d6 5. Be3 Qa5
e2e4 g7g6 d2d4 f8g7 c2c4 c7c5 b1c3 d7d6 c1e3 d8a5
rnb1k1nr/pp2ppbp/3p2p1/q1p5/2PPP3/2N1B3/PP3PPP/R2QKBNR w KQkq -

B06 Pterodactyl Defense: Central, Benoni Quetzalcoatlus
1. e4 g6 2. d4 Bg7 3. c4 c5 4. d5 d6 5. Nc3 Qa5
e2e4 g7g6 d2d4 f8g7 c2c4 c7c5 d4d5 d7d6 b1c3 d8a5
rnb1k1nr/pp2ppbp/3p2p1/q1pP4/2P1P3/2N5/PP3PPP/R1BQKBNR w KQkq -

B06 Pterodactyl Defense: Central, Quetzalcoatlus Gambit
1. e4 g6 2. d4 Bg7 3. c4 c5 4. Nc3 d6 5. dxc5 Qa5
e2e4 g7g6 d2d4 f8g7 c2c4 c7c5 b1c3 d7d6 d4c5 d8a5
rnb1k1nr/pp2ppbp/3p2p1/q1P5/2P1P3/2N5/PP3PPP/R1BQKBNR w KQkq -

B06 Pterodactyl Defense: Eastern, Anhanguera
1. e4 g6 2. d4 Bg7 3. Nc3 c5 4. Be3
e2e4 g7g6 d2d4 f8g7 b1c3 c7c5 c1e3
rnbqk1nr/pp1pppbp/6p1/2p5/3PP3/2N1B3/PPP2PPP/R2QKBNR b KQkq -

B06 Pterodactyl Defense: Eastern, Benoni
1. d4 g6 2. e4 Bg7 3. Nc3 c5 4. d5
d2d4 g7g6 e2e4 f8g7 b1c3 c7c5 d4d5
rnbqk1nr/pp1pppbp/6p1/2pP4/4P3/2N5/PPP2PPP/R1BQKBNR b KQkq -

B06 Pterodactyl Defense: Eastern, Benoni Pteranodon
1. e4 g6 2. d4 Bg7 3. Nc3 c5 4. d5 Bxc3+ 5. bxc3 Qa5
e2e4 g7g6 d2d4 f8g7 b1c3 c7c5 d4d5 g7c3 b2c3 d8a5
rnb1k1nr/pp1ppp1p/6p1/q1pP4/4P3/2P5/P1P2PPP/R1BQKBNR w KQkq -

B06 Pterodactyl Defense: Eastern, Benoni Pterodactyl
1. d4 g6 2. Nc3 Bg7 3. e4 c5 4. d5 Qa5
d2d4 g7g6 b1c3 f8g7 e2e4 c7c5 d4d5 d8a5
rnb1k1nr/pp1pppbp/6p1/q1pP4/4P3/2N5/PPP2PPP/R1BQKBNR w KQkq -

B06 Pterodactyl Defense: Eastern, Pteranodon
1. e4 g6 2. d4 Bg7 3. Nc3 c5 4. dxc5 Bxc3+ 5. bxc3 Qa5
e2e4 g7g6 d2d4 f8g7 b1c3 c7c5 d4c5 g7c3 b2c3 d8a5
rnb1k1nr/pp1ppp1p/6p1/q1P5/4P3/2P5/P1P2PPP/R1BQKBNR w KQkq -

B06 Pterodactyl Defense: Eastern, Pterodactyl
1. e4 g6 2. d4 Bg7 3. Nc3 c5 4. dxc5 Qa5
e2e4 g7g6 d2d4 f8g7 b1c3 c7c5 d4c5 d8a5
rnb1k1nr/pp1pppbp/6p1/q1P5/4P3/2N5/PPP2PPP/R1BQKBNR w KQkq -

B06 Pterodactyl Defense: Eastern, Rhamphorhynchus
1. e4 g6 2. d4 Bg7 3. Nc3 c5 4. dxc5
e2e4 g7g6 d2d4 f8g7 b1c3 c7c5 d4c5
rnbqk1nr/pp1pppbp/6p1/2P5/4P3/2N5/PPP2PPP/R1BQKBNR b KQkq -

B06 Pterodactyl Defense: Fianchetto, King Pterodactyl
1. e4 g6 2. d4 Bg7 3. g3 c5 4. Nf3 Qa5+
e2e4 g7g6 d2d4 f8g7 g2g3 c7c5 g1f3 d8a5
rnb1k1nr/pp1pppbp/6p1/q1p5/3PP3/5NP1/PPP2P1P/RNBQKB1R w KQkq -

B06 Pterodactyl Defense: Fianchetto, Rhamphorhynchus
1. e4 g6 2. d4 Bg7 3. g3 c5 4. dxc5 Qa5+
e2e4 g7g6 d2d4 f8g7 g2g3 c7c5 d4c5 d8a5
rnb1k1nr/pp1pppbp/6p1/q1P5/4P3/6P1/PPP2P1P/RNBQKBNR w KQkq -

B06 Pterodactyl Defense: Sicilian, Quetzalcoatlus
1. e4 g6 2. d4 Bg7 3. Nc3 c5 4. Nf3 Qa5 5. Be2 d6
e2e4 g7g6 d2d4 f8g7 b1c3 c7c5 g1f3 d8a5 f1e2 d7d6
rnb1k1nr/pp2ppbp/3p2p1/q1p5/3PP3/2N2N2/PPP1BPPP/R1BQK2R w KQkq -

B06 Pterodactyl Defense: Sicilian, Siroccopteryx
1. e4 g6 2. d4 Bg7 3. Nc3 c5 4. Nf3 Qa5 5. Bc4
e2e4 g7g6 d2d4 f8g7 b1c3 c7c5 g1f3 d8a5 f1c4
rnb1k1nr/pp1pppbp/6p1/q1p5/2BPP3/2N2N2/PPP2PPP/R1BQK2R b KQkq -

B06 Pterodactyl Defense: Western, Anhanguera
1. e4 g6 2. d4 Bg7 3. Nf3 c5 4. Be3 Qa5+
e2e4 g7g6 d2d4 f8g7 g1f3 c7c5 c1e3 d8a5
rnb1k1nr/pp1pppbp/6p1/q1p5/3PP3/4BN2/PPP2PPP/RN1QKB1R w KQkq -

B06 Pterodactyl Defense: Western, Siroccopteryx
1. e4 g6 2. Nf3 Bg7 3. d4 c5 4. Bc4 cxd4 5. Nxd4 Qa5+
e2e4 g7g6 g1f3 f8g7 d2d4 c7c5 f1c4 c5d4 f3d4 d8a5
rnb1k1nr/pp1pppbp/6p1/q7/2BNP3/8/PPP2PPP/RNBQK2R w KQkq -

B06 Rat Defense: Accelerated Gurgenidze
1. e4 g6 2. d4 d6 3. Nc3 c6
e2e4 g7g6 d2d4 d7d6 b1c3 c7c6
rnbqkbnr/pp2pp1p/2pp2p1/8/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq -

B07 Czech Defense
1. e4 d6 2. d4 Nf6 3. Nc3 c6
e2e4 d7d6 d2d4 g8f6 b1c3 c7c6
rnbqkb1r/pp2pppp/2pp1n2/8/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq -

B07 King's Pawn Game: Maróczy Defense
1. e4 d6 2. d4 e5
e2e4 d7d6 d2d4 e7e5
rnbqkbnr/ppp2ppp/3p4/4p3/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -

B07 Lion Defense: Anti-Philidor
1. e4 d6 2. d4 Nf6 3. Nc3 Nbd7 4. f4
e2e4 d7d6 d2d4 g8f6 b1c3 b8d7 f2f4
r1bqkb1r/pppnpppp/3p1n2/8/3PPP2/2N5/PPP3PP/R1BQKBNR b KQkq -

B07 Lion Defense: Anti-Philidor, Lion's Cave
1. e4 d6 2. d4 Nf6 3. Nc3 Nbd7 4. f4 e5
e2e4 d7d6 d2d4 g8f6 b1c3 b8d7 f2f4 e7e5
r1bqkb1r/pppn1ppp/3p1n2/4p3/3PPP2/2N5/PPP3PP/R1BQKBNR w KQkq -

B07 Lion Defense: Anti-Philidor, Lion's Cave, Lion Claw Gambit
1. e4 d6 2. d4 Nf6 3. Nc3 Nbd7 4. f4 e5 5. Nf3 exd4 6. Qxd4 c6 7. Bc4 d5
e2e4 d7d6 d2d4 g8f6 b1c3 b8d7 f2f4 e7e5 g1f3 e5d4 d1d4 c7c6 f1c4 d6d5
r1bqkb1r/pp1n1ppp/2p2n2/3p4/2BQPP2/2N2N2/PPP3PP/R1B1K2R w KQkq -

B07 Lion Defense: Bayonet Attack
1. e4 d6 2. d4 Nf6 3. Nc3 Nbd7 4. g4
e2e4 d7d6 d2d4 g8f6 b1c3 b8d7 g2g4
r1bqkb1r/pppnpppp/3p1n2/8/3PP1P1/2N5/PPP2P1P/R1BQKBNR b KQkq -

B07 Modern Defense: Geller's System
1. e4 g6 2. d4 Bg7 3. Nf3 d6 4. c3
e2e4 g7g6 d2d4 f8g7 g1f3 d7d6 c2c3
rnbqk1nr/ppp1ppbp/3p2p1/8/3PP3/2P2N2/PP3PPP/RNBQKB1R b KQkq -

B07 Pirc Defense
1. e4 d6 2. d4 Nf6 3. Nc3 g6
e2e4 d7d6 d2d4 g8f6 b1c3 g7g6
rnbqkb1r/ppp1pp1p/3p1np1/8/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq -

B07 Pirc Defense: 150 Attack
1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Be3 c6 5. Qd2
e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 c1e3 c7c6 d1d2
rnbqkb1r/pp2pp1p/2pp1np1/8/3PP3/2N1B3/PPPQ1PPP/R3KBNR b KQkq -

B07 Pirc Defense: 150 Attack, Inner Doll Defense
1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Be3 c6 5. Qd2 Bg4
e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 c1e3 c7c6 d1d2 c8g4
rn1qkb1r/pp2pp1p/2pp1np1/8/3PP1b1/2N1B3/PPPQ1PPP/R3KBNR w KQkq -

B07 Pirc Defense: 150 Attack, Sveshnikov-Jansa Attack
1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Be3 c6 5. h3
e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 c1e3 c7c6 h2h3
rnbqkb1r/pp2pp1p/2pp1np1/8/3PP3/2N1B2P/PPP2PP1/R2QKBNR b KQkq -

B07 Pirc Defense: Bayonet Attack
1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Be2 Bg7 5. h4
e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 f1e2 f8g7 h2h4
rnbqk2r/ppp1ppbp/3p1np1/8/3PP2P/2N5/PPP1BPP1/R1BQK1NR b KQkq -

B07 Pirc Defense: Byrne Variation
1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Bg5
e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 c1g5
rnbqkb1r/ppp1pp1p/3p1np1/6B1/3PP3/2N5/PPP2PPP/R2QKBNR b KQkq -

B07 Pirc Defense: Chinese Variation
1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Be2 Bg7 5. g4
e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 f1e2 f8g7 g2g4
rnbqk2r/ppp1ppbp/3p1np1/8/3PP1P1/2N5/PPP1BP1P/R1BQK1NR b KQkq -

B07 Pirc Defense: Kholmov System
1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Bc4
e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 f1c4
rnbqkb1r/ppp1pp1p/3p1np1/8/2BPP3/2N5/PPP2PPP/R1BQK1NR b KQkq -

B07 Pirc Defense: Sveshnikov System
1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. g3
e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 g2g3
rnbqkb1r/ppp1pp1p/3p1np1/8/3PP3/2N3P1/PPP2P1P/R1BQKBNR b KQkq -

B08 Pirc Defense: Classical Variation
1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Nf3
e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 g1f3
rnbqkb1r/ppp1pp1p/3p1np1/8/3PP3/2N2N2/PPP2PPP/R1BQKB1R b KQkq -

B08 Pirc Defense: Classical Variation
1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Nf3 Bg7
e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 g1f3 f8g7
rnbqk2r/ppp1ppbp/3p1np1/8/3PP3/2N2N2/PPP2PPP/R1BQKB1R w KQkq -

B08 Pirc Defense: Classical Variation, Quiet System
1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Nf3 Bg7 5. Be2
e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 g1f3 f8g7 f1e2
rnbqk2r/ppp1ppbp/3p1np1/8/3PP3/2N2N2/PPP1BPPP/R1BQK2R b KQkq -

B08 Pirc Defense: Classical Variation, Quiet System, Chigorin Line
1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Nf3 Bg7 5. Be2 O-O 6. O-O Nc6
e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 g1f3 f8g7 f1e2 e8g8 e1g1 b8c6
r1bq1rk1/ppp1ppbp/2np1np1/8/3PP3/2N2N2/PPP1BPPP/R1BQ1RK1 w - -

B08 Pirc Defense: Classical Variation, Quiet System, Czech Defense
1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Nf3 Bg7 5. Be2 O-O 6. O-O c6
e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 g1f3 f8g7 f1e2 e8g8 e1g1 c7c6
rnbq1rk1/pp2ppbp/2pp1np1/8/3PP3/2N2N2/PPP1BPPP/R1BQ1RK1 w - -

B08 Pirc Defense: Classical Variation, Quiet System, Parma Defense
1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Nf3 Bg7 5. Be2 O-O 6. O-O Bg4
e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 g1f3 f8g7 f1e2 e8g8 e1g1 c8g4
rn1q1rk1/ppp1ppbp/3p1np1/8/3PP1b1/2N2N2/PPP1BPPP/R1BQ1RK1 w - -

B08 Pirc Defense: Classical Variation, Schlechter Variation
1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Nf3 Bg7 5. h3
e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 g1f3 f8g7 h2h3
rnbqk2r/ppp1ppbp/3p1np1/8/3PP3/2N2N1P/PPP2PP1/R1BQKB1R b KQkq -

B09 Pirc Defense: Austrian Attack
1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4
e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 f2f4
rnbqkb1r/ppp1pp1p/3p1np1/8/3PPP2/2N5/PPP3PP/R1BQKBNR b KQkq -

B09 Pirc Defense: Austrian Attack
1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 O-O
e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 f2f4 f8g7 g1f3 e8g8
rnbq1rk1/ppp1ppbp/3p1np1/8/3PPP2/2N2N2/PPP3PP/R1BQKB1R w KQ -

B09 Pirc Defense: Austrian Attack, Dragon Formation
1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 c5
e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 f2f4 f8g7 g1f3 c7c5
rnbqk2r/pp2ppbp/3p1np1/2p5/3PPP2/2N2N2/PPP3PP/R1BQKB1R w KQkq -

B09 Pirc Defense: Austrian Attack, Kurajica Variation
1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 O-O 6. Be3
e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 f2f4 f8g7 g1f3 e8g8 c1e3
rnbq1rk1/ppp1ppbp/3p1np1/8/3PPP2/2N1BN2/PPP3PP/R2QKB1R b KQ -

B09 Pirc Defense: Austrian Attack, Ljubojevic Variation
1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Bc4
e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 f2f4 f8g7 f1c4
rnbqk2r/ppp1ppbp/3p1np1/8/2BPPP2/2N5/PPP3PP/R1BQK1NR b KQkq -

B09 Pirc Defense: Austrian Attack, Unzicker Attack
1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 O-O 6. e5
e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 f2f4 f8g7 g1f3 e8g8 e4e5
rnbq1rk1/ppp1ppbp/3p1np1/4P3/3P1P2/2N2N2/PPP3PP/R1BQKB1R b KQ -

B09 Pirc Defense: Austrian Attack, Unzicker Attack, Bronstein Variation
1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 O-O 6. e5 Nfd7 7. h4
e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 f2f4 f8g7 g1f3 e8g8 e4e5 f6d7 h2h4
rnbq1rk1/pppnppbp/3p2p1/4P3/3P1P1P/2N2N2/PPP3P1/R1BQKB1R b KQ -

B09 Pirc Defense: Austrian Attack, Weiss Variation
1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 O-O 6. Bd3
e2e4 d7d6 d2d4 g8f6 b1c3 g7g6 f2f4 f8g7 g1f3 e8g8 f1d3
rnbq1rk1/ppp1ppbp/3p1np1/8/3PPP2/2NB1N2/PPP3PP/R1BQK2R b KQ -

B10 Caro-Kann Defense
1. e4 c6
e2e4 c7c6
rnbqkbnr/pp1ppppp/2p5/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -

B10 Caro-Kann Defense
1. e4 c6 2. Nc3
e2e4 c7c6 b1c3
rnbqkbnr/pp1ppppp/2p5/8/4P3/2N5/PPPP1PPP/R1BQKBNR b KQkq -

B10 Caro-Kann Defense
1. e4 c6 2. Nc3 d5
e2e4 c7c6 b1c3 d7d5
rnbqkbnr/pp2pppp/2p5/3p4/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -

B10 Caro-Kann Defense: Accelerated Panov Attack
1. e4 c6 2. c4
e2e4 c7c6 c2c4
rnbqkbnr/pp1ppppp/2p5/8/2P1P3/8/PP1P1PPP/RNBQKBNR b KQkq -

B10 Caro-Kann Defense: Accelerated Panov Attack
1. e4 c6 2. c4 d5
e2e4 c7c6 c2c4 d7d5
rnbqkbnr/pp2pppp/2p5/3p4/2P1P3/8/PP1P1PPP/RNBQKBNR w KQkq -

B10 Caro-Kann Defense: Accelerated Panov Attack, Modern Variation
1. e4 c6 2. c4 d5 3. exd5 cxd5 4. cxd5 Nf6
e2e4 c7c6 c2c4 d7d5 e4d5 c6d5 c4d5 g8f6
rnbqkb1r/pp2pppp/5n2/3P4/8/8/PP1P1PPP/RNBQKBNR w KQkq -

B10 Caro-Kann Defense: Accelerated Panov Attack, Open Variation
1. e4 c6 2. c4 e5
e2e4 c7c6 c2c4 e7e5
rnbqkbnr/pp1p1ppp/2p5/4p3/2P1P3/8/PP1P1PPP/RNBQKBNR w KQkq -

B10 Caro-Kann Defense: Accelerated Panov Attack, Pseudo-Scandinavian
1. e4 c6 2. c4 d5 3. exd5 Qxd5
e2e4 c7c6 c2c4 d7d5 e4d5 d8d5
rnb1kbnr/pp2pppp/2p5/3q4/2P5/8/PP1P1PPP/RNBQKBNR w KQkq -

B10 Caro-Kann Defense: Accelerated Panov Attack, Van Weersel Attack
1. e4 c6 2. c4 d5 3. cxd5 cxd5 4. Qb3
e2e4 c7c6 c2c4 d7d5 c4d5 c6d5 d1b3
rnbqkbnr/pp2pppp/8/3p4/4P3/1Q6/PP1P1PPP/RNB1KBNR b KQkq -

B10 Caro-Kann Defense: Apocalypse Attack
1. e4 c6 2. Nf3 d5 3. exd5 cxd5 4. Ne5
e2e4 c7c6 g1f3 d7d5 e4d5 c6d5 f3e5
rnbqkbnr/pp2pppp/8/3pN3/8/8/PPPP1PPP/RNBQKB1R b KQkq -

B10 Caro-Kann Defense: Breyer Variation
1. e4 c6 2. d3
e2e4 c7c6 d2d3
rnbqkbnr/pp1ppppp/2p5/8/4P3/3P4/PPP2PPP/RNBQKBNR b KQkq -

B10 Caro-Kann Defense: Breyer Variation, Stein Attack
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
e2e4 c7c6 d2d3 d7d5 b1d2 g7g6 g1f3 f8g7 g2g3 e7e5 f1g2 g8e7 e1g1 e8g8 b2b4
rnbq1rk1/pp2npbp/2p3p1/3pp3/1P2P3/3P1NP1/P1PN1PBP/R1BQ1RK1 b - -

B10 Caro-Kann Defense: Endgame Offer
1. e4 c6 2. Nf3 d5 3. d3
e2e4 c7c6 g1f3 d7d5 d2d3
rnbqkbnr/pp2pppp/2p5/3p4/4P3/3P1N2/PPP2PPP/RNBQKB1R b KQkq -

B10 Caro-Kann Defense: Endgame Variation
1. e4 c6 2. Nf3 d5 3. d3 dxe4 4. dxe4 Qxd1+ 5. Kxd1
e2e4 c7c6 g1f3 d7d5 d2d3 d5e4 d3e4 d8d1 e1d1
rnb1kbnr/pp2pppp/2p5/8/4P3/5N2/PPP2PPP/RNBK1B1R b kq -

B10 Caro-Kann Defense: Euwe Attack
1. e4 c6 2. b3
e2e4 c7c6 b2b3
rnbqkbnr/pp1ppppp/2p5/8/4P3/1P6/P1PP1PPP/RNBQKBNR b KQkq -

B10 Caro-Kann Defense: Goldman Variation
1. e4 c6 2. Nc3 d5 3. Qf3
e2e4 c7c6 b1c3 d7d5 d1f3
rnbqkbnr/pp2pppp/2p5/3p4/4P3/2N2Q2/PPPP1PPP/R1B1KBNR b KQkq -

B10 Caro-Kann Defense: Hector Gambit
1. e4 c6 2. Nc3 d5 3. Nf3 dxe4 4. Ng5
e2e4 c7c6 b1c3 d7d5 g1f3 d5e4 f3g5
rnbqkbnr/pp2pppp/2p5/6N1/4p3/2N5/PPPP1PPP/R1BQKB1R b KQkq -

B10 Caro-Kann Defense: Hillbilly Attack
1. e4 c6 2. Bc4
e2e4 c7c6 f1c4
rnbqkbnr/pp1ppppp/2p5/8/2B1P3/8/PPPP1PPP/RNBQK1NR b KQkq -

B10 Caro-Kann Defense: Hillbilly Attack, Schaeffer Gambit
1. e4 c6 2. Bc4 d5 3. Bb3 dxe4 4. Qh5
e2e4 c7c6 f1c4 d7d5 c4b3 d5e4 d1h5
rnbqkbnr/pp2pppp/2p5/7Q/4p3/1B6/PPPP1PPP/RNB1K1NR b KQkq -

B10 Caro-Kann Defense: Labahn Attack
1. e4 c6 2. b4
e2e4 c7c6 b2b4
rnbqkbnr/pp1ppppp/2p5/8/1P2P3/8/P1PP1PPP/RNBQKBNR b KQkq -

B10 Caro-Kann Defense: Labahn Attack, Double Gambit
1. e4 c6 2. b4 d5 3. b5
e2e4 c7c6 b2b4 d7d5 b4b5
rnbqkbnr/pp2pppp/2p5/1P1p4/4P3/8/P1PP1PPP/RNBQKBNR b KQkq -

B10 Caro-Kann Defense: Labahn Attack, Polish Variation
1. e4 c6 2. b4 e5 3. Bb2
e2e4 c7c6 b2b4 e7e5 c1b2
rnbqkbnr/pp1p1ppp/2p5/4p3/1P2P3/8/PBPP1PPP/RN1QKBNR b KQkq -

B10 Caro-Kann Defense: Scorpion-Horus Gambit
1. e4 c6 2. Nc3 d5 3. d3 dxe4 4. Bg5
e2e4 c7c6 b1c3 d7d5 d2d3 d5e4 c1g5
rnbqkbnr/pp2pppp/2p5/6B1/4p3/2NP4/PPP2PPP/R2QKBNR b KQkq -

B10 Caro-Kann Defense: Spike Variation
1. e4 c6 2. g4
e2e4 c7c6 g2g4
rnbqkbnr/pp1ppppp/2p5/8/4P1P1/8/PPPP1P1P/RNBQKBNR b KQkq -

B10 Caro-Kann Defense: Spike Variation, Scorpion-Grob Gambit
1. e4 c6 2. g4 d5 3. Nc3 dxe4 4. d3
e2e4 c7c6 g2g4 d7d5 b1c3 d5e4 d2d3
rnbqkbnr/pp2pppp/2p5/8/4p1P1/2NP4/PPP2P1P/R1BQKBNR b KQkq -

B10 Caro-Kann Defense: St. Patrick's Attack
1. e4 c6 2. Nc3 d5 3. h3
e2e4 c7c6 b1c3 d7d5 h2h3
rnbqkbnr/pp2pppp/2p5/3p4/4P3/2N4P/PPPP1PP1/R1BQKBNR b KQkq -

B10 Caro-Kann Defense: Toikkanen Gambit
1. e4 c6 2. c4 d5 3. e5
e2e4 c7c6 c2c4 d7d5 e4e5
rnbqkbnr/pp2pppp/2p5/3pP3/2P5/8/PP1P1PPP/RNBQKBNR b KQkq -

B10 Caro-Kann Defense: Two Knights Attack
1. e4 c6 2. Nc3 d5 3. Nf3
e2e4 c7c6 b1c3 d7d5 g1f3
rnbqkbnr/pp2pppp/2p5/3p4/4P3/2N2N2/PPPP1PPP/R1BQKB1R b KQkq -

B11 Caro-Kann Defense: Two Knights Attack, Mindeno Variation
1. e4 c6 2. Nc3 d5 3. Nf3 Bg4
e2e4 c7c6 b1c3 d7d5 g1f3 c8g4
rn1qkbnr/pp2pppp/2p5/3p4/4P1b1/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -

B11 Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Exchange Line
1. e4 c6 2. Nc3 d5 3. Nf3 Bg4 4. h3 Bxf3
e2e4 c7c6 b1c3 d7d5 g1f3 c8g4 h2h3 g4f3
rn1qkbnr/pp2pppp/2p5/3p4/4P3/2N2b1P/PPPP1PP1/R1BQKB1R w KQkq -

B11 Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Retreat Line
1. e4 c6 2. Nc3 d5 3. Nf3 Bg4 4. h3 Bh5
e2e4 c7c6 b1c3 d7d5 g1f3 c8g4 h2h3 g4h5
rn1qkbnr/pp2pppp/2p5/3p3b/4P3/2N2N1P/PPPP1PP1/R1BQKB1R w KQkq -

B12 Caro-Kann Defense
1. e4 c6 2. d4
e2e4 c7c6 d2d4
rnbqkbnr/pp1ppppp/2p5/8/3PP3/8/PPP2PPP/RNBQKBNR b KQkq -

B12 Caro-Kann Defense
1. e4 c6 2. d4 d5
e2e4 c7c6 d2d4 d7d5
rnbqkbnr/pp2pppp/2p5/3p4/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -

B12 Caro-Kann Defense: Advance Variation
1. e4 c6 2. d4 d5 3. e5
e2e4 c7c6 d2d4 d7d5 e4e5
rnbqkbnr/pp2pppp/2p5/3pP3/3P4/8/PPP2PPP/RNBQKBNR b KQkq -

B12 Caro-Kann Defense: Advance Variation, Bayonet Attack
1. e4 c6 2. d4 d5 3. e5 Bf5 4. g4
e2e4 c7c6 d2d4 d7d5 e4e5 c8f5 g2g4
rn1qkbnr/pp2pppp/2p5/3pPb2/3P2P1/8/PPP2P1P/RNBQKBNR b KQkq -

B12 Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense
1. e4 c6 2. d4 d5 3. e5 c5
e2e4 c7c6 d2d4 d7d5 e4e5 c6c5
rnbqkbnr/pp2pppp/8/2ppP3/3P4/8/PPP2PPP/RNBQKBNR w KQkq -

B12 Caro-Kann Defense: Advance Variation, Bronstein Variation
1. e4 c6 2. d4 d5 3. e5 Bf5 4. Ne2
e2e4 c7c6 d2d4 d7d5 e4e5 c8f5 g1e2
rn1qkbnr/pp2pppp/2p5/3pPb2/3P4/8/PPP1NPPP/RNBQKB1R b KQkq -

B12 Caro-Kann Defense: Advance Variation, Prins Attack
1. e4 c6 2. d4 d5 3. e5 Bf5 4. b4
e2e4 c7c6 d2d4 d7d5 e4e5 c8f5 b2b4
rn1qkbnr/pp2pppp/2p5/3pPb2/1P1P4/8/P1P2PPP/RNBQKBNR b KQkq -

B12 Caro-Kann Defense: Advance Variation, Short Variation
1. e4 c6 2. d4 d5 3. e5 Bf5 4. Nf3
e2e4 c7c6 d2d4 d7d5 e4e5 c8f5 g1f3
rn1qkbnr/pp2pppp/2p5/3pPb2/3P4/5N2/PPP2PPP/RNBQKB1R b KQkq -

B12 Caro-Kann Defense: Advance Variation, Tal Variation
1. e4 c6 2. d4 d5 3. e5 Bf5 4. h4
e2e4 c7c6 d2d4 d7d5 e4e5 c8f5 h2h4
rn1qkbnr/pp2pppp/2p5/3pPb2/3P3P/8/PPP2PP1/RNBQKBNR b KQkq -

B12 Caro-Kann Defense: Advance Variation, Van der Wiel Attack
1. e4 c6 2. d4 d5 3. e5 Bf5 4. Nc3
e2e4 c7c6 d2d4 d7d5 e4e5 c8f5 b1c3
rn1qkbnr/pp2pppp/2p5/3pPb2/3P4/2N5/PPP2PPP/R1BQKBNR b KQkq -

B12 Caro-Kann Defense: Advance Variation, Van der Wiel Attack
1. e4 c6 2. d4 d5 3. e5 Bf5 4. Nc3 e6 5. g4 Bg6 6. Nge2 c5 7. h4
e2e4 c7c6 d2d4 d7d5 e4e5 c8f5 b1c3 e7e6 g2g4 f5g6 g1e2 c6c5 h2h4
rn1qkbnr/pp3ppp/4p1b1/2ppP3/3P2PP/2N5/PPP1NP2/R1BQKB1R b KQkq -

B12 Caro-Kann Defense: Advance Variation, Van der Wiel Attack, Dreyev Defense
1. e4 c6 2. d4 d5 3. e5 Bf5 4. Nc3 Qb6
e2e4 c7c6 d2d4 d7d5 e4e5 c8f5 b1c3 d8b6
rn2kbnr/pp2pppp/1qp5/3pPb2/3P4/2N5/PPP2PPP/R1BQKBNR w KQkq -

B12 Caro-Kann Defense: Advance, Short Variation
1. e4 c6 2. d4 d5 3. e5 Bf5 4. c3 e6 5. Be2
e2e4 c7c6 d2d4 d7d5 e4e5 c8f5 c2c3 e7e6 f1e2
rn1qkbnr/pp3ppp/2p1p3/3pPb2/3P4/2P5/PP2BPPP/RNBQK1NR b KQkq -

B12 Caro-Kann Defense: De Bruycker Defense
1. e4 c6 2. d4 Na6
e2e4 c7c6 d2d4 b8a6
r1bqkbnr/pp1ppppp/n1p5/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -

B12 Caro-Kann Defense: De Bruycker Defense
1. e4 c6 2. d4 Na6 3. Nc3 Nc7
e2e4 c7c6 d2d4 b8a6 b1c3 a6c7
r1bqkbnr/ppnppppp/2p5/8/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq -

B12 Caro-Kann Defense: Edinburgh Variation
1. e4 c6 2. d4 d5 3. Nd2 Qb6
e2e4 c7c6 d2d4 d7d5 b1d2 d8b6
rnb1kbnr/pp2pppp/1qp5/3p4/3PP3/8/PPPN1PPP/R1BQKBNR w KQkq -

B12 Caro-Kann Defense: Maróczy Variation
1. e4 c6 2. d4 d5 3. f3
e2e4 c7c6 d2d4 d7d5 f2f3
rnbqkbnr/pp2pppp/2p5/3p4/3PP3/5P2/PPP3PP/RNBQKBNR b KQkq -

B12 Caro-Kann Defense: Maróczy Variation, Maróczy Gambit
1. e4 c6 2. d4 d5 3. f3 dxe4 4. fxe4 e5 5. Nf3 exd4 6. Bc4
e2e4 c7c6 d2d4 d7d5 f2f3 d5e4 f3e4 e7e5 g1f3 e5d4 f1c4
rnbqkbnr/pp3ppp/2p5/8/2BpP3/5N2/PPP3PP/RNBQK2R b KQkq -

B12 Caro-Kann Defense: Masi Variation
1. e4 c6 2. d4 Nf6
e2e4 c7c6 d2d4 g8f6
rnbqkb1r/pp1ppppp/2p2n2/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -

B12 Caro-Kann Defense: Massachusetts Defense
1. e4 c6 2. d4 f5
e2e4 c7c6 d2d4 f7f5
rnbqkbnr/pp1pp1pp/2p5/5p2/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -

B12 Caro-Kann Defense: Mieses Attack, Landau Gambit
1. e4 c6 2. d4 d5 3. Bd3 Nf6 4. e5 Nfd7 5. e6
e2e4 c7c6 d2d4 d7d5 f1d3 g8f6 e4e5 f6d7 e5e6
rnbqkb1r/pp1npppp/2p1P3/3p4/3P4/3B4/PPP2PPP/RNBQK1NR b KQkq -

B12 Caro-Kann Defense: Mieses Gambit
1. e4 c6 2. d4 d5 3. Be3
e2e4 c7c6 d2d4 d7d5 c1e3
rnbqkbnr/pp2pppp/2p5/3p4/3PP3/4B3/PPP2PPP/RN1QKBNR b KQkq -

B12 Caro-Kann Defense: Modern Variation
1. e4 c6 2. d4 d5 3. Nd2
e2e4 c7c6 d2d4 d7d5 b1d2
rnbqkbnr/pp2pppp/2p5/3p4/3PP3/8/PPPN1PPP/R1BQKBNR b KQkq -

B12 Caro-Kann Defense: Ulysses Gambit
1. e4 c6 2. d4 d5 3. Nf3 dxe4 4. Ng5
e2e4 c7c6 d2d4 d7d5 g1f3 d5e4 f3g5
rnbqkbnr/pp2pppp/2p5/6N1/3Pp3/8/PPP2PPP/RNBQKB1R b KQkq -

B13 Caro-Kann Defense: Exchange Variation
1. e4 c6 2. d4 d5 3. exd5
e2e4 c7c6 d2d4 d7d5 e4d5
rnbqkbnr/pp2pppp/2p5/3P4/3P4/8/PPP2PPP/RNBQKBNR b KQkq -

B13 Caro-Kann Defense: Exchange Variation
1. e4 c6 2. d4 d5 3. exd5 cxd5 4. Nf3 Nc6
e2e4 c7c6 d2d4 d7d5 e4d5 c6d5 g1f3 b8c6
r1bqkbnr/pp2pppp/2n5/3p4/3P4/5N2/PPP2PPP/RNBQKB1R w KQkq -

B13 Caro-Kann Defense: Exchange Variation, Bulla Attack
1. e4 c6 2. d4 d5 3. exd5 cxd5 4. g4
e2e4 c7c6 d2d4 d7d5 e4d5 c6d5 g2g4
rnbqkbnr/pp2pppp/8/3p4/3P2P1/8/PPP2P1P/RNBQKBNR b KQkq -

B13 Caro-Kann Defense: Exchange Variation, Rubinstein Variation
1. e4 c6 2. d4 d5 3. exd5 cxd5 4. Bd3 Nc6 5. c3 Nf6 6. Bf4
e2e4 c7c6 d2d4 d7d5 e4d5 c6d5 f1d3 b8c6 c2c3 g8f6 c1f4
r1bqkb1r/pp2pppp/2n2n2/3p4/3P1B2/2PB4/PP3PPP/RN1QK1NR b KQkq -

B13 Caro-Kann Defense: Panov Attack
1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4
e2e4 c7c6 d2d4 d7d5 e4d5 c6d5 c2c4
rnbqkbnr/pp2pppp/8/3p4/2PP4/8/PP3PPP/RNBQKBNR b KQkq -

B13 Caro-Kann Defense: Panov Attack
1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3
e2e4 c7c6 d2d4 d7d5 e4d5 c6d5 c2c4 g8f6 b1c3
rnbqkb1r/pp2pppp/5n2/3p4/2PP4/2N5/PP3PPP/R1BQKBNR b KQkq -

B13 Caro-Kann Defense: Panov Attack, Gunderam Attack
1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. c5
e2e4 c7c6 d2d4 d7d5 e4d5 c6d5 c2c4 g8f6 c4c5
rnbqkb1r/pp2pppp/5n2/2Pp4/3P4/8/PP3PPP/RNBQKBNR b KQkq -

B13 Caro-Kann Defense: Panov Attack, Modern Defense
1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 Nc6
e2e4 c7c6 d2d4 d7d5 e4d5 c6d5 c2c4 g8f6 b1c3 b8c6
r1bqkb1r/pp2pppp/2n2n2/3p4/2PP4/2N5/PP3PPP/R1BQKBNR w KQkq -

B13 Caro-Kann Defense: Panov Attack, Modern Defense, Carlsbad Line
1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 Nc6 6. Bg5 e6
e2e4 c7c6 d2d4 d7d5 e4d5 c6d5 c2c4 g8f6 b1c3 b8c6 c1g5 e7e6
r1bqkb1r/pp3ppp/2n1pn2/3p2B1/2PP4/2N5/PP3PPP/R2QKBNR w KQkq -

B13 Caro-Kann Defense: Panov Attack, Modern Defense, Czerniak Line
1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 Nc6 6. Bg5 Qa5
e2e4 c7c6 d2d4 d7d5 e4d5 c6d5 c2c4 g8f6 b1c3 b8c6 c1g5 d8a5
r1b1kb1r/pp2pppp/2n2n2/q2p2B1/2PP4/2N5/PP3PPP/R2QKBNR w KQkq -

B13 Caro-Kann Defense: Panov Attack, Modern Defense, Mieses Line
1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 Nc6 6. Nf3 Bg4
e2e4 c7c6 d2d4 d7d5 e4d5 c6d5 c2c4 g8f6 b1c3 b8c6 g1f3 c8g4
r2qkb1r/pp2pppp/2n2n2/3p4/2PP2b1/2N2N2/PP3PPP/R1BQKB1R w KQkq -

B13 Caro-Kann Defense: Panov Attack, Modern Defense, Reifir-Spielmann Line
1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 Nc6 6. Bg5 Qb6
e2e4 c7c6 d2d4 d7d5 e4d5 c6d5 c2c4 g8f6 b1c3 b8c6 c1g5 d8b6
r1b1kb1r/pp2pppp/1qn2n2/3p2B1/2PP4/2N5/PP3PPP/R2QKBNR w KQkq -

B13 Caro-Kann Defense: Panov-Botvinnik, Herzog Defense
1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 Nc6 6. Bg5 dxc4 7. d5 Na5
e2e4 c7c6 d2d4 d7d5 e4d5 c6d5 c2c4 g8f6 b1c3 b8c6 c1g5 d5c4 d4d5 c6a5
r1bqkb1r/pp2pppp/5n2/n2P2B1/2p5/2N5/PP3PPP/R2QKBNR w KQkq -

B14 Caro-Kann Defense: Panov Attack
1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 e6
e2e4 c7c6 d2d4 d7d5 e4d5 c6d5 c2c4 g8f6 b1c3 e7e6
rnbqkb1r/pp3ppp/4pn2/3p4/2PP4/2N5/PP3PPP/R1BQKBNR w KQkq -

B14 Caro-Kann Defense: Panov Attack, Fianchetto Defense
1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 g6
e2e4 c7c6 d2d4 d7d5 e4d5 c6d5 c2c4 g8f6 b1c3 g7g6
rnbqkb1r/pp2pp1p/5np1/3p4/2PP4/2N5/PP3PPP/R1BQKBNR w KQkq -

B14 Caro-Kann Defense: Panov Attack, Fianchetto Defense, Fianchetto Gambit
1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 g6 6. cxd5 Bg7
e2e4 c7c6 d2d4 d7d5 e4d5 c6d5 c2c4 g8f6 b1c3 g7g6 c4d5 f8g7
rnbqk2r/pp2ppbp/5np1/3P4/3P4/2N5/PP3PPP/R1BQKBNR w KQkq -

B14 Caro-Kann Defense: Panov Attack, Main Line
1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 e6 6. Nf3 Bb4
e2e4 c7c6 d2d4 d7d5 e4d5 c6d5 c2c4 g8f6 b1c3 e7e6 g1f3 f8b4
rnbqk2r/pp3ppp/4pn2/3p4/1bPP4/2N2N2/PP3PPP/R1BQKB1R w KQkq -

B15 Caro-Kann Defense
1. e4 c6 2. d4 d5 3. Nc3
e2e4 c7c6 d2d4 d7d5 b1c3
rnbqkbnr/pp2pppp/2p5/3p4/3PP3/2N5/PPP2PPP/R1BQKBNR b KQkq -

B15 Caro-Kann Defense
1. e4 c6 2. d4 d5 3. Nc3 dxe4
e2e4 c7c6 d2d4 d7d5 b1c3 d5e4
rnbqkbnr/pp2pppp/2p5/8/3Pp3/2N5/PPP2PPP/R1BQKBNR w KQkq -

B15 Caro-Kann Defense: Alekhine Gambit
1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Bd3
e2e4 c7c6 d2d4 d7d5 b1c3 d5e4 c3e4 g8f6 f1d3
rnbqkb1r/pp2pppp/2p2n2/8/3PN3/3B4/PPP2PPP/R1BQK1NR b KQkq -

B15 Caro-Kann Defense: Alien Gambit
1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Ng5 h6 6. Nxf7
e2e4 c7c6 d2d4 d7d5 b1c3 d5e4 c3e4 g8f6 e4g5 h7h6 g5f7
rnbqkb1r/pp2pNp1/2p2n1p/8/3P4/8/PPP2PPP/R1BQKBNR b KQkq -

B15 Caro-Kann Defense: Campomanes Attack
1. e4 c6 2. d4 d5 3. Nc3 Nf6
e2e4 c7c6 d2d4 d7d5 b1c3 g8f6
rnbqkb1r/pp2pppp/2p2n2/3p4/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq -

B15 Caro-Kann Defense: Forgacs Variation
1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Nxf6+ exf6 6. Bc4
e2e4 c7c6 d2d4 d7d5 b1c3 d5e4 c3e4 g8f6 e4f6 e7f6 f1c4
rnbqkb1r/pp3ppp/2p2p2/8/2BP4/8/PPP2PPP/R1BQK1NR b KQkq -

B15 Caro-Kann Defense: Gurgenidze Counterattack
1. e4 c6 2. d4 d5 3. Nc3 b5
e2e4 c7c6 d2d4 d7d5 b1c3 b7b5
rnbqkbnr/p3pppp/2p5/1p1p4/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq -

B15 Caro-Kann Defense: Gurgenidze System
1. e4 c6 2. d4 d5 3. Nc3 g6
e2e4 c7c6 d2d4 d7d5 b1c3 g7g6
rnbqkbnr/pp2pp1p/2p3p1/3p4/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq -

B15 Caro-Kann Defense: Main Line
1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4
e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4
rnbqkbnr/pp2pppp/2p5/8/3PN3/8/PPP2PPP/R1BQKBNR b KQkq -

B15 Caro-Kann Defense: Rasa-Studier Gambit
1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. f3
e2e4 c7c6 d2d4 d7d5 b1c3 d5e4 f2f3
rnbqkbnr/pp2pppp/2p5/8/3Pp3/2N2P2/PPP3PP/R1BQKBNR b KQkq -

B15 Caro-Kann Defense: Tartakower Variation
1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Nxf6+ exf6
e2e4 c7c6 d2d4 d7d5 b1c3 d5e4 c3e4 g8f6 e4f6 e7f6
rnbqkb1r/pp3ppp/2p2p2/8/3P4/8/PPP2PPP/R1BQKBNR w KQkq -

B15 Caro-Kann Defense: von Hennig Gambit
1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Bc4
e2e4 c7c6 d2d4 d7d5 b1c3 d5e4 f1c4
rnbqkbnr/pp2pppp/2p5/8/2BPp3/2N5/PPP2PPP/R1BQK1NR b KQkq -

B16 Caro-Kann Defense: Bronstein-Larsen Variation
1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Nxf6+ gxf6
e2e4 c7c6 d2d4 d7d5 b1c3 d5e4 c3e4 g8f6 e4f6 g7f6
rnbqkb1r/pp2pp1p/2p2p2/8/3P4/8/PPP2PPP/R1BQKBNR w KQkq -

B16 Caro-Kann Defense: Finnish Variation
1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 h6
e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 h7h6
rnbqkbnr/pp2ppp1/2p4p/8/3PN3/8/PPP2PPP/R1BQKBNR w KQkq -

B17 Caro-Kann Defense: Karpov Variation
1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nd7
e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 b8d7
r1bqkbnr/pp1npppp/2p5/8/3PN3/8/PPP2PPP/R1BQKBNR w KQkq -

B17 Caro-Kann Defense: Karpov Variation, Modern Main Line
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
e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 b8d7 e4g5 g8f6 f1d3 e7e6 g1f3 f8d6 d1e2 h7h6 g5e4 f6e4 e2e4
r1bqk2r/pp1n1pp1/2pbp2p/8/3PQ3/3B1N2/PPP2PPP/R1B1K2R b KQkq -

B17 Caro-Kann Defense: Karpov Variation, Modern Variation
1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nd7 5. Ng5
e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 b8d7 e4g5
r1bqkbnr/pp1npppp/2p5/6N1/3P4/8/PPP2PPP/R1BQKBNR b KQkq -

B17 Caro-Kann Defense: Karpov Variation, Modern Variation, Ivanchuk Defense
1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nd7 5. Ng5 Ndf6
e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 b8d7 e4g5 d7f6
r1bqkbnr/pp2pppp/2p2n2/6N1/3P4/8/PPP2PPP/R1BQKBNR w KQkq -

B17 Caro-Kann Defense: Karpov Variation, Modern Variation, Kasparov Attack
1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nd7 5. Nf3 Ngf6 6. Ng3
e2e4 c7c6 d2d4 d7d5 b1c3 d5e4 c3e4 b8d7 g1f3 g8f6 e4g3
r1bqkb1r/pp1npppp/2p2n2/8/3P4/5NN1/PPP2PPP/R1BQKB1R b KQkq -

B17 Caro-Kann Defense: Karpov Variation, Smyslov Variation
1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nd7 5. Bc4 Ngf6 6. Ng5 e6 7. Qe2 Nb6
e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 b8d7 f1c4 g8f6 e4g5 e7e6 d1e2 d7b6
r1bqkb1r/pp3ppp/1np1pn2/6N1/2BP4/8/PPP1QPPP/R1B1K1NR w KQkq -

B17 Caro-Kann Defense: Karpov Variation, Smyslov Variation, Main Line
1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nd7 5. Bc4 Ngf6 6. Ng5 e6 7. Qe2 Nb6 8. Bb3
e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 b8d7 f1c4 g8f6 e4g5 e7e6 d1e2 d7b6 c4b3
r1bqkb1r/pp3ppp/1np1pn2/6N1/3P4/1B6/PPP1QPPP/R1B1K1NR b KQkq -

B17 Caro-Kann Defense: Karpov Variation, Tiviakov-Fischer Attack
1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nd7 5. Bc4 Ngf6 6. Nxf6+ Nxf6
e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 b8d7 f1c4 g8f6 e4f6 d7f6
r1bqkb1r/pp2pppp/2p2n2/8/2BP4/8/PPP2PPP/R1BQK1NR w KQkq -

B18 Caro-Kann Defense: Classical Variation
1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Bf5
e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 c8f5
rn1qkbnr/pp2pppp/2p5/5b2/3PN3/8/PPP2PPP/R1BQKBNR w KQkq -

B18 Caro-Kann Defense: Classical Variation, Flohr Variation
1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. Nh3
e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 c8f5 e4g3 f5g6 g1h3
rn1qkbnr/pp2pppp/2p3b1/8/3P4/6NN/PPP2PPP/R1BQKB1R b KQkq -

B18 Caro-Kann Defense: Classical Variation, Main Line
1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4
e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 c8f5 e4g3 f5g6 h2h4
rn1qkbnr/pp2pppp/2p3b1/8/3P3P/6N1/PPP2PP1/R1BQKBNR b KQkq -

B18 Caro-Kann Defense: Classical Variation, Maróczy Attack
1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. f4
e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 c8f5 e4g3 f5g6 f2f4
rn1qkbnr/pp2pppp/2p3b1/8/3P1P2/6N1/PPP3PP/R1BQKBNR b KQkq -

B18 Caro-Kann Defense: Martian Gambit
1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Bf5 5. Ng5 Bg6 6. N1f3 h6 7. Ne6
e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 c8f5 e4g5 f5g6 g1f3 h7h6 g5e6
rn1qkbnr/pp2ppp1/2p1N1bp/8/3P4/5N2/PPP2PPP/R1BQKB1R b KQkq -

B19 Caro-Kann Defense: Classical Variation
1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. Nf3 Nd7
e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 c8f5 e4g3 f5g6 h2h4 h7h6 g1f3 b8d7
r2qkbnr/pp1nppp1/2p3bp/8/3P3P/5NN1/PPP2PP1/R1BQKB1R w KQkq -

B19 Caro-Kann Defense: Classical Variation, Lobron System
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
e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 c8f5 e4g3 f5g6 h2h4 h7h6 g1f3 b8d7 h4h5 g6h7 f1d3 h7d3 d1d3 e7e6 c1d2 g8f6 e1c1 f8e7
r2qk2r/pp1nbpp1/2p1pn1p/7P/3P4/3Q1NN1/PPPB1PP1/2KR3R w kq -

B19 Caro-Kann Defense: Classical Variation, Seirawan Variation
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
e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 c8f5 e4g3 f5g6 h2h4 h7h6 g1f3 b8d7 h4h5 g6h7 f1d3 h7d3 d1d3 g8f6 c1d2 e7e6 e1c1 f8d6
r2qk2r/pp1n1pp1/2pbpn1p/7P/3P4/3Q1NN1/PPPB1PP1/2KR3R w kq -

B19 Caro-Kann Defense: Classical Variation, Spassky Variation
1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. Nf3 Nd7 8. h5
e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 c8f5 e4g3 f5g6 h2h4 h7h6 g1f3 b8d7 h4h5
r2qkbnr/pp1nppp1/2p3bp/7P/3P4/5NN1/PPP2PP1/R1BQKB1R b KQkq -

B20 Sicilian Defense
1. e4 c5
e2e4 c7c5
rnbqkbnr/pp1ppppp/8/2p5/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -

B20 Sicilian Defense: Amazon Attack
1. e4 c5 2. Qg4
e2e4 c7c5 d1g4
rnbqkbnr/pp1ppppp/8/2p5/4P1Q1/8/PPPP1PPP/RNB1KBNR b KQkq -

B20 Sicilian Defense: Big Clamp Formation
1. e4 c5 2. d3 Nc6 3. c3 d6 4. f4
e2e4 c7c5 d2d3 b8c6 c2c3 d7d6 f2f4
r1bqkbnr/pp2pppp/2np4/2p5/4PP2/2PP4/PP4PP/RNBQKBNR b KQkq -

B20 Sicilian Defense: Bowdler Attack
1. e4 c5 2. Bc4
e2e4 c7c5 f1c4
rnbqkbnr/pp1ppppp/8/2p5/2B1P3/8/PPPP1PPP/RNBQK1NR b KQkq -

B20 Sicilian Defense: Brick Variation
1. e4 c5 2. Nh3
e2e4 c7c5 g1h3
rnbqkbnr/pp1ppppp/8/2p5/4P3/7N/PPPP1PPP/RNBQKB1R b KQkq -

B20 Sicilian Defense: Euwe Attack, Prins Gambit
1. e4 c5 2. b3 d5 3. Bb2
e2e4 c7c5 b2b3 d7d5 c1b2
rnbqkbnr/pp2pppp/8/2pp4/4P3/1P6/PBPP1PPP/RN1QKBNR b KQkq -

B20 Sicilian Defense: Gloria Variation
1. e4 c5 2. c4 d6 3. Nc3 Nc6 4. g3 h5
e2e4 c7c5 c2c4 d7d6 b1c3 b8c6 g2g3 h7h5
r1bqkbnr/pp2ppp1/2np4/2p4p/2P1P3/2N3P1/PP1P1P1P/R1BQKBNR w KQkq -

B20 Sicilian Defense: Grob Variation
1. e4 c5 2. g4
e2e4 c7c5 g2g4
rnbqkbnr/pp1ppppp/8/2p5/4P1P1/8/PPPP1P1P/RNBQKBNR b KQkq -

B20 Sicilian Defense: Keres Variation
1. e4 c5 2. Ne2
e2e4 c7c5 g1e2
rnbqkbnr/pp1ppppp/8/2p5/4P3/8/PPPPNPPP/RNBQKB1R b KQkq -

B20 Sicilian Defense: King David's Opening
1. e4 c5 2. Ke2
e2e4 c7c5 e1e2
rnbqkbnr/pp1ppppp/8/2p5/4P3/8/PPPPKPPP/RNBQ1BNR b kq -

B20 Sicilian Defense: Kronberger Variation
1. e4 c5 2. Na3
e2e4 c7c5 b1a3
rnbqkbnr/pp1ppppp/8/2p5/4P3/N7/PPPP1PPP/R1BQKBNR b KQkq -

B20 Sicilian Defense: Kronberger Variation, Nemeth Gambit
1. e4 c5 2. Na3 Nc6 3. d4 cxd4 4. Bc4
e2e4 c7c5 b1a3 b8c6 d2d4 c5d4 f1c4
r1bqkbnr/pp1ppppp/2n5/8/2BpP3/N7/PPP2PPP/R1BQK1NR b KQkq -

B20 Sicilian Defense: Lasker-Dunne Attack
1. e4 c5 2. g3
e2e4 c7c5 g2g3
rnbqkbnr/pp1ppppp/8/2p5/4P3/6P1/PPPP1P1P/RNBQKBNR b KQkq -

B20 Sicilian Defense: Mengarini Variation
1. e4 c5 2. a3
e2e4 c7c5 a2a3
rnbqkbnr/pp1ppppp/8/2p5/4P3/P7/1PPP1PPP/RNBQKBNR b KQkq -

B20 Sicilian Defense: Myers Attack, with a4
1. e4 c5 2. a4
e2e4 c7c5 a2a4
rnbqkbnr/pp1ppppp/8/2p5/P3P3/8/1PPP1PPP/RNBQKBNR b KQkq -

B20 Sicilian Defense: Myers Attack, with h4
1. e4 c5 2. h4
e2e4 c7c5 h2h4
rnbqkbnr/pp1ppppp/8/2p5/4P2P/8/PPPP1PP1/RNBQKBNR b KQkq -

B20 Sicilian Defense: Snyder Variation
1. e4 c5 2. b3
e2e4 c7c5 b2b3
rnbqkbnr/pp1ppppp/8/2p5/4P3/1P6/P1PP1PPP/RNBQKBNR b KQkq -

B20 Sicilian Defense: Snyder Variation, Queen Fianchetto Variation
1. e4 c5 2. b3 b6
e2e4 c7c5 b2b3 b7b6
rnbqkbnr/p2ppppp/1p6/2p5/4P3/1P6/P1PP1PPP/RNBQKBNR w KQkq -

B20 Sicilian Defense: Staunton-Cochrane Variation
1. e4 c5 2. c4
e2e4 c7c5 c2c4
rnbqkbnr/pp1ppppp/8/2p5/2P1P3/8/PP1P1PPP/RNBQKBNR b KQkq -

B20 Sicilian Defense: Wing Gambit
1. e4 c5 2. b4
e2e4 c7c5 b2b4
rnbqkbnr/pp1ppppp/8/2p5/1P2P3/8/P1PP1PPP/RNBQKBNR b KQkq -

B20 Sicilian Defense: Wing Gambit, Abrahams Variation
1. e4 c5 2. b4 cxb4 3. Bb2
e2e4 c7c5 b2b4 c5b4 c1b2
rnbqkbnr/pp1ppppp/8/8/1p2P3/8/PBPP1PPP/RN1QKBNR b KQkq -

B20 Sicilian Defense: Wing Gambit, Carlsbad Variation
1. e4 c5 2. b4 cxb4 3. a3 bxa3
e2e4 c7c5 b2b4 c5b4 a2a3 b4a3
rnbqkbnr/pp1ppppp/8/8/4P3/p7/2PP1PPP/RNBQKBNR w KQkq -

B20 Sicilian Defense: Wing Gambit, Marienbad Variation
1. e4 c5 2. b4 cxb4 3. a3 d5 4. exd5 Qxd5 5. Bb2
e2e4 c7c5 b2b4 c5b4 a2a3 d7d5 e4d5 d8d5 c1b2
rnb1kbnr/pp2pppp/8/3q4/1p6/P7/1BPP1PPP/RN1QKBNR b KQkq -

B20 Sicilian Defense: Wing Gambit, Marshall Variation
1. e4 c5 2. b4 cxb4 3. a3
e2e4 c7c5 b2b4 c5b4 a2a3
rnbqkbnr/pp1ppppp/8/8/1p2P3/P7/2PP1PPP/RNBQKBNR b KQkq -

B20 Sicilian Defense: Wing Gambit, Nanu Gambit
1. e4 c5 2. b4 cxb4 3. a3 d5 4. exd5 Qxd5 5. Nf3 e5 6. c4 Qe6 7. Bd3
e2e4 c7c5 b2b4 c5b4 a2a3 d7d5 e4d5 d8d5 g1f3 e7e5 c2c4 d5e6 f1d3
rnb1kbnr/pp3ppp/4q3/4p3/1pP5/P2B1N2/3P1PPP/RNBQK2R b KQkq -

B20 Sicilian Defense: Wing Gambit, Romanian Defense
1. e4 c5 2. b4 cxb4 3. a3 d5 4. exd5 Qxd5 5. Nf3 e5 6. Bb2 Nc6 7. c4 Qe6
e2e4 c7c5 b2b4 c5b4 a2a3 d7d5 e4d5 d8d5 g1f3 e7e5 c1b2 b8c6 c2c4 d5e6
r1b1kbnr/pp3ppp/2n1q3/4p3/1pP5/P4N2/1B1P1PPP/RN1QKB1R w KQkq -

B20 Sicilian Defense: Wing Gambit, Santasiere Variation
1. e4 c5 2. b4 cxb4 3. c4
e2e4 c7c5 b2b4 c5b4 c2c4
rnbqkbnr/pp1ppppp/8/8/1pP1P3/8/P2P1PPP/RNBQKBNR b KQkq c3

B21 Bird Opening: Dutch Variation, Batavo Gambit
1. e4 c5 2. f4 d5 3. Nf3 dxe4
e2e4 c7c5 f2f4 d7d5 g1f3 d5e4
rnbqkbnr/pp2pppp/8/2p5/4pP2/5N2/PPPP2PP/RNBQKB1R w KQkq -

B21 Sicilian Defense: Coles Sicilian Gambit
1. e4 c5 2. d4 cxd4 3. Qxd4 Nc6 4. Qd1 Nf6 5. Bc4
e2e4 c7c5 d2d4 c5d4 d1d4 b8c6 d4d1 g8f6 f1c4
r1bqkb1r/pp1ppppp/2n2n2/8/2B1P3/8/PPP2PPP/RNBQK1NR b KQkq -

B21 Sicilian Defense: Halasz Gambit
1. e4 c5 2. d4 cxd4 3. f4
e2e4 c7c5 d2d4 c5d4 f2f4
rnbqkbnr/pp1ppppp/8/8/3pPP2/8/PPP3PP/RNBQKBNR b KQkq -

B21 Sicilian Defense: McDonnell Attack
1. e4 c5 2. f4
e2e4 c7c5 f2f4
rnbqkbnr/pp1ppppp/8/2p5/4PP2/8/PPPP2PP/RNBQKBNR b KQkq -

B21 Sicilian Defense: McDonnell Attack, Tal Gambit
1. e4 c5 2. f4 d5 3. exd5 Nf6
e2e4 c7c5 f2f4 d7d5 e4d5 g8f6
rnbqkb1r/pp2pppp/5n2/2pP4/5P2/8/PPPP2PP/RNBQKBNR w KQkq -

B21 Sicilian Defense: Morphy Gambit
1. e4 c5 2. d4 cxd4 3. Nf3
e2e4 c7c5 d2d4 c5d4 g1f3
rnbqkbnr/pp1ppppp/8/8/3pP3/5N2/PPP2PPP/RNBQKB1R b KQkq -

B21 Sicilian Defense: Morphy Gambit, Andreaschek Gambit
1. e4 c5 2. d4 cxd4 3. Nf3 e5 4. c3
e2e4 c7c5 d2d4 c5d4 g1f3 e7e5 c2c3
rnbqkbnr/pp1p1ppp/8/4p3/3pP3/2P2N2/PP3PPP/RNBQKB1R b KQkq -

B21 Sicilian Defense: Smith-Morra Gambit
1. e4 c5 2. d4
e2e4 c7c5 d2d4
rnbqkbnr/pp1ppppp/8/2p5/3PP3/8/PPP2PPP/RNBQKBNR b KQkq -

B21 Sicilian Defense: Smith-Morra Gambit
1. e4 c5 2. d4 cxd4 3. c3
e2e4 c7c5 d2d4 c5d4 c2c3
rnbqkbnr/pp1ppppp/8/8/3pP3/2P5/PP3PPP/RNBQKBNR b KQkq -

B21 Sicilian Defense: Smith-Morra Gambit Accepted
1. e4 c5 2. d4 cxd4 3. c3 dxc3
e2e4 c7c5 d2d4 c5d4 c2c3 d4c3
rnbqkbnr/pp1ppppp/8/8/4P3/2p5/PP3PPP/RNBQKBNR w KQkq -

B21 Sicilian Defense: Smith-Morra Gambit Accepted, Chicago Defense
1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 d6 5. Nf3 e6 6. Bc4 Nf6 7. O-O a6
e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 d7d6 g1f3 e7e6 f1c4 g8f6 e1g1 a7a6
rnbqkb1r/1p3ppp/p2ppn2/8/2B1P3/2N2N2/PP3PPP/R1BQ1RK1 w kq -

B21 Sicilian Defense: Smith-Morra Gambit Accepted, Classical Formation
1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 d6 6. Bc4 a6 7. O-O Nf6
e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 b8c6 g1f3 d7d6 f1c4 a7a6 e1g1 g8f6
r1bqkb1r/1p2pppp/p1np1n2/8/2B1P3/2N2N2/PP3PPP/R1BQ1RK1 w kq -

B21 Sicilian Defense: Smith-Morra Gambit Accepted, Fianchetto Defense
1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 g6
e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 b8c6 g1f3 g7g6
r1bqkbnr/pp1ppp1p/2n3p1/8/4P3/2N2N2/PP3PPP/R1BQKB1R w KQkq -

B21 Sicilian Defense: Smith-Morra Gambit Accepted, Finegold Defense
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
e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 e7e6 g1f3 d7d6 f1c4 a7a6 e1g1 f8e7 d1e2 g8f6
rnbqk2r/1p2bppp/p2ppn2/8/2B1P3/2N2N2/PP2QPPP/R1B2RK1 w kq -

B21 Sicilian Defense: Smith-Morra Gambit Accepted, Kan Formation
1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 e6 5. Nf3 a6
e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 e7e6 g1f3 a7a6
rnbqkbnr/1p1p1ppp/p3p3/8/4P3/2N2N2/PP3PPP/R1BQKB1R w KQkq -

B21 Sicilian Defense: Smith-Morra Gambit Accepted, Larsen Defense
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
e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 b8c6 g1f3 e7e6 f1c4 d8c7 d1e2 a7a6 e1g1 f8d6
r1b1k1nr/1pqp1ppp/p1nbp3/8/2B1P3/2N2N2/PP2QPPP/R1B2RK1 w kq -

B21 Sicilian Defense: Smith-Morra Gambit Accepted, Morphy Defense
1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 e6 6. Bc4 Bc5
e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 b8c6 g1f3 e7e6 f1c4 f8c5
r1bqk1nr/pp1p1ppp/2n1p3/2b5/2B1P3/2N2N2/PP3PPP/R1BQK2R w KQkq -

B21 Sicilian Defense: Smith-Morra Gambit Accepted, Morphy Defense Deferred
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
e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 b8c6 g1f3 e7e6 f1c4 a7a6 e1g1 b7b5 c4b3 f8c5
r1bqk1nr/3p1ppp/p1n1p3/1pb5/4P3/1BN2N2/PP3PPP/R1BQ1RK1 w kq -

B21 Sicilian Defense: Smith-Morra Gambit Accepted, Paulsen Formation
1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 e6 6. Bc4 a6
e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 b8c6 g1f3 e7e6 f1c4 a7a6
r1bqkbnr/1p1p1ppp/p1n1p3/8/2B1P3/2N2N2/PP3PPP/R1BQK2R w KQkq -

B21 Sicilian Defense: Smith-Morra Gambit Accepted, Pin Defense
1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 e6 6. Bc4 Bb4
e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 b8c6 g1f3 e7e6 f1c4 f8b4
r1bqk1nr/pp1p1ppp/2n1p3/8/1bB1P3/2N2N2/PP3PPP/R1BQK2R w KQkq -

B21 Sicilian Defense: Smith-Morra Gambit Accepted, Scheveningen Formation
1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 d6 6. Bc4 e6
e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 b8c6 g1f3 d7d6 f1c4 e7e6
r1bqkbnr/pp3ppp/2npp3/8/2B1P3/2N2N2/PP3PPP/R1BQK2R w KQkq -

B21 Sicilian Defense: Smith-Morra Gambit Accepted, Siberian Variation
1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 e6 6. Bc4 Qc7
e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 b8c6 g1f3 e7e6 f1c4 d8c7
r1b1kbnr/ppqp1ppp/2n1p3/8/2B1P3/2N2N2/PP3PPP/R1BQK2R w KQkq -

B21 Sicilian Defense: Smith-Morra Gambit Accepted, Siberian Variation, Siberian Trap
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
e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 b8c6 g1f3 e7e6 f1c4 d8c7 d1e2 g8f6 e1g1 f6g4
r1b1kb1r/ppqp1ppp/2n1p3/8/2B1P1n1/2N2N2/PP2QPPP/R1B2RK1 w kq -

B21 Sicilian Defense: Smith-Morra Gambit Accepted, Sozin Formation
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
e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 b8c6 f1c4 e7e6 g1f3 d7d6 e1g1 a7a6 d1e2 b7b5
r1bqkbnr/5ppp/p1npp3/1p6/2B1P3/2N2N2/PP2QPPP/R1B2RK1 w kq -

B21 Sicilian Defense: Smith-Morra Gambit Accepted, Taimanov Formation
1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 e6 5. Bc4 a6 6. Nf3 Ne7
e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 e7e6 f1c4 a7a6 g1f3 g8e7
rnbqkb1r/1p1pnppp/p3p3/8/2B1P3/2N2N2/PP3PPP/R1BQK2R w KQkq -

B21 Sicilian Defense: Smith-Morra Gambit Declined, Alapin Formation
1. e4 c5 2. d4 cxd4 3. c3 Nf6
e2e4 c7c5 d2d4 c5d4 c2c3 g8f6
rnbqkb1r/pp1ppppp/5n2/8/3pP3/2P5/PP3PPP/RNBQKBNR w KQkq -

B21 Sicilian Defense: Smith-Morra Gambit Declined, Center Formation
1. e4 c5 2. d4 cxd4 3. c3 e5
e2e4 c7c5 d2d4 c5d4 c2c3 e7e5
rnbqkbnr/pp1p1ppp/8/4p3/3pP3/2P5/PP3PPP/RNBQKBNR w KQkq -

B21 Sicilian Defense: Smith-Morra Gambit Declined, Dubois Variation
1. e4 c5 2. d4 cxd4 3. c3 d3 4. c4
e2e4 c7c5 d2d4 c5d4 c2c3 d4d3 c3c4
rnbqkbnr/pp1ppppp/8/8/2P1P3/3p4/PP3PPP/RNBQKBNR b KQkq -

B21 Sicilian Defense: Smith-Morra Gambit Declined, Push Variation
1. e4 c5 2. d4 cxd4 3. c3 d3
e2e4 c7c5 d2d4 c5d4 c2c3 d4d3
rnbqkbnr/pp1ppppp/8/8/4P3/2Pp4/PP3PPP/RNBQKBNR w KQkq -

B21 Sicilian Defense: Smith-Morra Gambit Declined, Scandinavian Formation
1. e4 c5 2. d4 cxd4 3. c3 d5
e2e4 c7c5 d2d4 c5d4 c2c3 d7d5
rnbqkbnr/pp2pppp/8/3p4/3pP3/2P5/PP3PPP/RNBQKBNR w KQkq -

B21 Sicilian Defense: Smith-Morra Gambit Declined, Wing Formation
1. e4 c5 2. d4 cxd4 3. c3 Qa5
e2e4 c7c5 d2d4 c5d4 c2c3 d8a5
rnb1kbnr/pp1ppppp/8/q7/3pP3/2P5/PP3PPP/RNBQKBNR w KQkq -

B21 Sicilian Defense: Smith-Morra Gambit, Chicago Defense
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
e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 b8c6 f1c4 e7e6 g1f3 d7d6 e1g1 a7a6 d1e2 b7b5 c4b3 a8a7
2bqkbnr/r4ppp/p1npp3/1p6/4P3/1BN2N2/PP2QPPP/R1B2RK1 w k -

B21 Sicilian Defense: Smith-Morra Gambit, Danish Variation
1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nf3
e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 g1f3
rnbqkbnr/pp1ppppp/8/8/4P3/2p2N2/PP3PPP/RNBQKB1R b KQkq -

B22 Sicilian Defense: Alapin Variation
1. e4 c5 2. c3
e2e4 c7c5 c2c3
rnbqkbnr/pp1ppppp/8/2p5/4P3/2P5/PP1P1PPP/RNBQKBNR b KQkq -

B22 Sicilian Defense: Alapin Variation, Barmen Defense
1. e4 c5 2. c3 d5 3. exd5 Qxd5
e2e4 c7c5 c2c3 d7d5 e4d5 d8d5
rnb1kbnr/pp2pppp/8/2pq4/8/2P5/PP1P1PPP/RNBQKBNR w KQkq -

B22 Sicilian Defense: Alapin Variation, Barmen Defense, Central Exchange
1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 cxd4 5. cxd4 Nc6 6. Nf3 Bg4
e2e4 c7c5 c2c3 d7d5 e4d5 d8d5 d2d4 c5d4 c3d4 b8c6 g1f3 c8g4
r3kbnr/pp2pppp/2n5/3q4/3P2b1/5N2/PP3PPP/RNBQKB1R w KQkq -

B22 Sicilian Defense: Alapin Variation, Barmen Defense, Endgame Variation
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
e2e4 c7c5 c2c3 d7d5 e4d5 d8d5 d2d4 c5d4 c3d4 b8c6 g1f3 c8g4 b1c3 g4f3 g2f3 d5d4 d1d4 c6d4
r3kbnr/pp2pppp/8/8/3n4/2N2P2/PP3P1P/R1B1KB1R w KQkq -

B22 Sicilian Defense: Alapin Variation, Barmen Defense, Milner-Barry Attack
1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 Nc6 5. Nf3 cxd4 6. cxd4 e5 7. Nc3 Bb4 8. Be2
e2e4 c7c5 c2c3 d7d5 e4d5 d8d5 d2d4 b8c6 g1f3 c5d4 c3d4 e7e5 b1c3 f8b4 f1e2
r1b1k1nr/pp3ppp/2n5/3qp3/1b1P4/2N2N2/PP2BPPP/R1BQK2R b KQkq -

B22 Sicilian Defense: Alapin Variation, Barmen Defense, Modern Line
1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 Nf6 5. Nf3 Bg4
e2e4 c7c5 c2c3 d7d5 e4d5 d8d5 d2d4 g8f6 g1f3 c8g4
rn2kb1r/pp2pppp/5n2/2pq4/3P2b1/2P2N2/PP3PPP/RNBQKB1R w KQkq -

B22 Sicilian Defense: Alapin Variation, Smith-Morra Declined
1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. d4 cxd4
e2e4 c7c5 c2c3 g8f6 e4e5 f6d5 d2d4 c5d4
rnbqkb1r/pp1ppppp/8/3nP3/3p4/2P5/PP3PPP/RNBQKBNR w KQkq -

B22 Sicilian Defense: Alapin Variation, Stoltz Attack
1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. Nf3 Nc6 5. Bc4 Nb6 6. Bb3
e2e4 c7c5 c2c3 g8f6 e4e5 f6d5 g1f3 b8c6 f1c4 d5b6 c4b3
r1bqkb1r/pp1ppppp/1nn5/2p1P3/8/1BP2N2/PP1P1PPP/RNBQK2R b KQkq -

B22 Sicilian Defense: Alapin Variation, Stoltz Attack, Ivanchuk Line
1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. Nf3 Nc6 5. Bc4 Nb6 6. Bb3 c4 7. Bc2 Qc7 8. Qe2 g5
e2e4 c7c5 c2c3 g8f6 e4e5 f6d5 g1f3 b8c6 f1c4 d5b6 c4b3 c5c4 b3c2 d8c7 d1e2 g7g5
r1b1kb1r/ppqppp1p/1nn5/4P1p1/2p5/2P2N2/PPBPQPPP/RNB1K2R w KQkq -

B22 Sicilian Defense: Delayed Alapin Variation
1. e4 c5 2. Nf3 e6 3. c3 d5 4. exd5 Qxd5 5. d4 Nf6
e2e4 c7c5 g1f3 e7e6 c2c3 d7d5 e4d5 d8d5 d2d4 g8f6
rnb1kb1r/pp3ppp/4pn2/2pq4/3P4/2P2N2/PP3PPP/RNBQKB1R w KQkq -

B22 Sicilian Defense: Heidenfeld Variation
1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. Nf3 Nc6 5. Na3
e2e4 c7c5 c2c3 g8f6 e4e5 f6d5 g1f3 b8c6 b1a3
r1bqkb1r/pp1ppppp/2n5/2pnP3/8/N1P2N2/PP1P1PPP/R1BQKB1R b KQkq -

B23 Sicilian Defense: Closed
1. e4 c5 2. Nc3
e2e4 c7c5 b1c3
rnbqkbnr/pp1ppppp/8/2p5/4P3/2N5/PPPP1PPP/R1BQKBNR b KQkq -

B23 Sicilian Defense: Closed
1. e4 c5 2. Nc3 e6
e2e4 c7c5 b1c3 e7e6
rnbqkbnr/pp1p1ppp/4p3/2p5/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -

B23 Sicilian Defense: Closed
1. e4 c5 2. Nc3 e6 3. g3
e2e4 c7c5 b1c3 e7e6 g2g3
rnbqkbnr/pp1p1ppp/4p3/2p5/4P3/2N3P1/PPPP1P1P/R1BQKBNR b KQkq -

B23 Sicilian Defense: Closed, Chameleon Variation
1. e4 c5 2. Nc3 Nc6 3. Nge2
e2e4 c7c5 b1c3 b8c6 g1e2
r1bqkbnr/pp1ppppp/2n5/2p5/4P3/2N5/PPPPNPPP/R1BQKB1R b KQkq -

B23 Sicilian Defense: Closed, Grob Attack
1. e4 c5 2. Nc3 Nc6 3. g4
e2e4 c7c5 b1c3 b8c6 g2g4
r1bqkbnr/pp1ppppp/2n5/2p5/4P1P1/2N5/PPPP1P1P/R1BQKBNR b KQkq -

B23 Sicilian Defense: Closed, Korchnoi Defense
1. e4 c5 2. Nc3 e6 3. g3 d5
e2e4 c7c5 b1c3 e7e6 g2g3 d7d5
rnbqkbnr/pp3ppp/4p3/2pp4/4P3/2N3P1/PPPP1P1P/R1BQKBNR w KQkq -

B23 Sicilian Defense: Closed, Traditional
1. e4 c5 2. Nc3 Nc6
e2e4 c7c5 b1c3 b8c6
r1bqkbnr/pp1ppppp/2n5/2p5/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -

B23 Sicilian Defense: Grand Prix Attack
1. e4 c5 2. Nc3 Nc6 3. f4
e2e4 c7c5 b1c3 b8c6 f2f4
r1bqkbnr/pp1ppppp/2n5/2p5/4PP2/2N5/PPPP2PP/R1BQKBNR b KQkq -

B23 Sicilian Defense: Grand Prix Attack, Schofman Variation
1. e4 c5 2. Nc3 Nc6 3. f4 g6 4. Nf3 Bg7 5. Bc4 e6 6. f5
e2e4 c7c5 b1c3 b8c6 f2f4 g7g6 g1f3 f8g7 f1c4 e7e6 f4f5
r1bqk1nr/pp1p1pbp/2n1p1p1/2p2P2/2B1P3/2N2N2/PPPP2PP/R1BQK2R b KQkq -

B24 Sicilian Defense: Closed
1. e4 c5 2. Nc3 Nc6 3. g3 g6
e2e4 c7c5 b1c3 b8c6 g2g3 g7g6
r1bqkbnr/pp1ppp1p/2n3p1/2p5/4P3/2N3P1/PPPP1P1P/R1BQKBNR w KQkq -

B24 Sicilian Defense: Closed
1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7
e2e4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7
r1bqk1nr/pp1pppbp/2n3p1/2p5/4P3/2N3P1/PPPP1PBP/R1BQK1NR w KQkq -

B24 Sicilian Defense: Closed, Fianchetto Variation
1. e4 c5 2. Nc3 Nc6 3. g3
e2e4 c7c5 b1c3 b8c6 g2g3
r1bqkbnr/pp1ppppp/2n5/2p5/4P3/2N3P1/PPPP1P1P/R1BQKBNR b KQkq -

B24 Sicilian Defense: Closed, Smyslov Variation
1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 e6 6. Be3 Nd4 7. Nce2
e2e4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 d2d3 e7e6 c1e3 c6d4 c3e2
r1bqk1nr/pp1p1pbp/4p1p1/2p5/3nP3/3PB1P1/PPP1NPBP/R2QK1NR b KQkq -

B25 Sicilian Defense: Closed
1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6
e2e4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 d2d3 d7d6
r1bqk1nr/pp2ppbp/2np2p1/2p5/4P3/2NP2P1/PPP2PBP/R1BQK1NR w KQkq -

B25 Sicilian Defense: Closed
1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. f4
e2e4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 d2d3 d7d6 f2f4
r1bqk1nr/pp2ppbp/2np2p1/2p5/4PP2/2NP2P1/PPP3BP/R1BQK1NR b KQkq -

B25 Sicilian Defense: Closed, Botvinnik Defense, Edge Variation
1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. f4 e5 7. Nh3 Nge7
e2e4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 d2d3 d7d6 f2f4 e7e5 g1h3 g8e7
r1bqk2r/pp2npbp/2np2p1/2p1p3/4PP2/2NP2PN/PPP3BP/R1BQK2R w KQkq -

B25 Sicilian Defense: Closed, Botvinnik Defense, with Nge2
1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. Nge2 e5
e2e4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 d2d3 d7d6 g1e2 e7e5
r1bqk1nr/pp3pbp/2np2p1/2p1p3/4P3/2NP2P1/PPP1NPBP/R1BQK2R w KQkq -

B25 Sicilian Defense: Closed, Botvinnik Defense, with f4
1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. f4 e5
e2e4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 d2d3 d7d6 f2f4 e7e5
r1bqk1nr/pp3pbp/2np2p1/2p1p3/4PP2/2NP2P1/PPP3BP/R1BQK1NR w KQkq -

B26 Sicilian Defense: Closed
1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. Be3
e2e4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 d2d3 d7d6 c1e3
r1bqk1nr/pp2ppbp/2np2p1/2p5/4P3/2NPB1P1/PPP2PBP/R2QK1NR b KQkq -

B27 Modern Defense: Pterodactyl Variation
1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. Nc3 Qa5
e2e4 c7c5 g1f3 g7g6 d2d4 f8g7 b1c3 d8a5
rnb1k1nr/pp1pppbp/6p1/q1p5/3PP3/2N2N2/PPP2PPP/R1BQKB1R w KQkq -

B27 Pterodactyl Defense: Sicilian, Anhanguera
1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. Nc3 Qa5 5. Be3
e2e4 c7c5 g1f3 g7g6 d2d4 f8g7 b1c3 d8a5 c1e3
rnb1k1nr/pp1pppbp/6p1/q1p5/3PP3/2N1BN2/PPP2PPP/R2QKB1R b KQkq -

B27 Pterodactyl Defense: Sicilian, Benoni Gambit
1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. Nc3 Qa5 5. d5
e2e4 c7c5 g1f3 g7g6 d2d4 f8g7 b1c3 d8a5 d4d5
rnb1k1nr/pp1pppbp/6p1/q1pP4/4P3/2N2N2/PPP2PPP/R1BQKB1R b KQkq -

B27 Pterodactyl Defense: Sicilian, Pteranodon
1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. dxc5 Qa5+ 5. Nc3 Bxc3+ 6. bxc3
e2e4 c7c5 g1f3 g7g6 d2d4 f8g7 d4c5 d8a5 b1c3 g7c3 b2c3
rnb1k1nr/pp1ppp1p/6p1/q1P5/4P3/2P2N2/P1P2PPP/R1BQKB1R b KQkq -

B27 Pterodactyl Defense: Sicilian, Rhamphorhynchus
1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. dxc5 Qa5+ 5. Nc3
e2e4 c7c5 g1f3 g7g6 d2d4 f8g7 d4c5 d8a5 b1c3
rnb1k1nr/pp1pppbp/6p1/q1P5/4P3/2N2N2/PPP2PPP/R1BQKB1R b KQkq -

B27 Pterodactyl Defense: Sicilian, Unpin
1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. Nc3 Qa5 5. Bd2
e2e4 c7c5 g1f3 g7g6 d2d4 f8g7 b1c3 d8a5 c1d2
rnb1k1nr/pp1pppbp/6p1/q1p5/3PP3/2N2N2/PPPB1PPP/R2QKB1R b KQkq -

B27 Pterodactyl Defense: Western, Pterodactyl
1. e4 c5 2. Nf3 g6 3. c3 Bg7 4. d4 Qa5
e2e4 c7c5 g1f3 g7g6 c2c3 f8g7 d2d4 d8a5
rnb1k1nr/pp1pppbp/6p1/q1p5/3PP3/2P2N2/PP3PPP/RNBQKB1R w KQkq -

B27 Pterodactyl Defense: Western, Rhamphorhynchus
1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. dxc5 Qa5+
e2e4 c7c5 g1f3 g7g6 d2d4 f8g7 d4c5 d8a5
rnb1k1nr/pp1pppbp/6p1/q1P5/4P3/5N2/PPP2PPP/RNBQKB1R w KQkq -

B27 Sicilian Defense
1. e4 c5 2. Nf3
e2e4 c7c5 g1f3
rnbqkbnr/pp1ppppp/8/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq -

B27 Sicilian Defense: Acton Extension
1. e4 c5 2. Nf3 g6 3. c4 Bh6
e2e4 c7c5 g1f3 g7g6 c2c4 f8h6
rnbqk1nr/pp1ppp1p/6pb/2p5/2P1P3/5N2/PP1P1PPP/RNBQKB1R w KQkq -

B27 Sicilian Defense: Brussels Gambit
1. e4 c5 2. Nf3 f5
e2e4 c7c5 g1f3 f7f5
rnbqkbnr/pp1pp1pp/8/2p2p2/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -

B27 Sicilian Defense: Bücker Variation
1. e4 c5 2. Nf3 h6
e2e4 c7c5 g1f3 h7h6
rnbqkbnr/pp1pppp1/7p/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -

B27 Sicilian Defense: Double-Dutch Gambit
1. e4 c5 2. Nf3 f5 3. exf5 Nh6
e2e4 c7c5 g1f3 f7f5 e4f5 g8h6
rnbqkb1r/pp1pp1pp/7n/2p2P2/8/5N2/PPPP1PPP/RNBQKB1R w KQkq -

B27 Sicilian Defense: Frederico Variation
1. e4 c5 2. Nf3 g6 3. d4 f5
e2e4 c7c5 g1f3 g7g6 d2d4 f7f5
rnbqkbnr/pp1pp2p/6p1/2p2p2/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq -

B27 Sicilian Defense: Hyperaccelerated Dragon
1. e4 c5 2. Nf3 g6
e2e4 c7c5 g1f3 g7g6
rnbqkbnr/pp1ppp1p/6p1/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -

B27 Sicilian Defense: Hyperaccelerated Fianchetto
1. e4 c5 2. Nf3 g6 3. d4
e2e4 c7c5 g1f3 g7g6 d2d4
rnbqkbnr/pp1ppp1p/6p1/2p5/3PP3/5N2/PPP2PPP/RNBQKB1R b KQkq -

B27 Sicilian Defense: Hyperaccelerated Pterodactyl
1. e4 c5 2. Nf3 g6 3. d4 Bg7
e2e4 c7c5 g1f3 g7g6 d2d4 f8g7
rnbqk1nr/pp1pppbp/6p1/2p5/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq -

B27 Sicilian Defense: Hyperaccelerated Pterodactyl, Exchange Variation
1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. dxc5 Qa5+ 5. Nc3 Bxc3+ 6. bxc3 Qxc3+
e2e4 c7c5 g1f3 g7g6 d2d4 f8g7 d4c5 d8a5 b1c3 g7c3 b2c3 a5c3
rnb1k1nr/pp1ppp1p/6p1/2P5/4P3/2q2N2/P1P2PPP/R1BQKB1R w KQkq -

B27 Sicilian Defense: Jalalabad Variation
1. e4 c5 2. Nf3 e5
e2e4 c7c5 g1f3 e7e5
rnbqkbnr/pp1p1ppp/8/2p1p3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -

B27 Sicilian Defense: Katalimov Variation
1. e4 c5 2. Nf3 b6
e2e4 c7c5 g1f3 b7b6
rnbqkbnr/p2ppppp/1p6/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -

B27 Sicilian Defense: Mongoose Variation
1. e4 c5 2. Nf3 Qa5
e2e4 c7c5 g1f3 d8a5
rnb1kbnr/pp1ppppp/8/q1p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -

B27 Sicilian Defense: Polish Gambit
1. e4 c5 2. Nf3 b5
e2e4 c7c5 g1f3 b7b5
rnbqkbnr/p2ppppp/8/1pp5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -

B27 Sicilian Defense: Quinteros Variation
1. e4 c5 2. Nf3 Qc7
e2e4 c7c5 g1f3 d8c7
rnb1kbnr/ppqppppp/8/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -

B28 Sicilian Defense: O'Kelly Variation
1. e4 c5 2. Nf3 a6
e2e4 c7c5 g1f3 a7a6
rnbqkbnr/1p1ppppp/p7/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -

B28 Sicilian Defense: O'Kelly Variation, Aronin System
1. e4 c5 2. Nf3 a6 3. Be2
e2e4 c7c5 g1f3 a7a6 f1e2
rnbqkbnr/1p1ppppp/p7/2p5/4P3/5N2/PPPPBPPP/RNBQK2R b KQkq -

B28 Sicilian Defense: O'Kelly Variation, Kieseritzky System
1. e4 c5 2. Nf3 a6 3. b3
e2e4 c7c5 g1f3 a7a6 b2b3
rnbqkbnr/1p1ppppp/p7/2p5/4P3/1P3N2/P1PP1PPP/RNBQKB1R b KQkq -

B28 Sicilian Defense: O'Kelly Variation, Maróczy Bind
1. e4 c5 2. Nf3 a6 3. c4
e2e4 c7c5 g1f3 a7a6 c2c4
rnbqkbnr/1p1ppppp/p7/2p5/2P1P3/5N2/PP1P1PPP/RNBQKB1R b KQkq -

B28 Sicilian Defense: O'Kelly Variation, Maróczy Bind, Paulsen Line
1. e4 c5 2. Nf3 a6 3. c4 e6
e2e4 c7c5 g1f3 a7a6 c2c4 e7e6
rnbqkbnr/1p1p1ppp/p3p3/2p5/2P1P3/5N2/PP1P1PPP/RNBQKB1R w KQkq -

B28 Sicilian Defense: O'Kelly Variation, Maróczy Bind, Robatsch Line
1. e4 c5 2. Nf3 a6 3. c4 d6
e2e4 c7c5 g1f3 a7a6 c2c4 d7d6
rnbqkbnr/1p2pppp/p2p4/2p5/2P1P3/5N2/PP1P1PPP/RNBQKB1R w KQkq -

B28 Sicilian Defense: O'Kelly Variation, Normal System
1. e4 c5 2. Nf3 a6 3. d4
e2e4 c7c5 g1f3 a7a6 d2d4
rnbqkbnr/1p1ppppp/p7/2p5/3PP3/5N2/PPP2PPP/RNBQKB1R b KQkq -

B28 Sicilian Defense: O'Kelly Variation, Normal System, Cortlever Gambit
1. e4 c5 2. Nf3 a6 3. d4 cxd4 4. Bc4
e2e4 c7c5 g1f3 a7a6 d2d4 c5d4 f1c4
rnbqkbnr/1p1ppppp/p7/8/2BpP3/5N2/PPP2PPP/RNBQK2R b KQkq -

B28 Sicilian Defense: O'Kelly Variation, Normal System, Smith-Morra Line
1. e4 c5 2. Nf3 a6 3. d4 cxd4 4. c3
e2e4 c7c5 g1f3 a7a6 d2d4 c5d4 c2c3
rnbqkbnr/1p1ppppp/p7/8/3pP3/2P2N2/PP3PPP/RNBQKB1R b KQkq -

B28 Sicilian Defense: O'Kelly Variation, Normal System, Taimanov Line
1. e4 c5 2. Nf3 a6 3. d4 cxd4 4. Nxd4 e5
e2e4 c7c5 g1f3 a7a6 d2d4 c5d4 f3d4 e7e5
rnbqkbnr/1p1p1ppp/p7/4p3/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -

B28 Sicilian Defense: O'Kelly Variation, Normal System, Zagorovsky Line
1. e4 c5 2. Nf3 a6 3. d4 cxd4 4. Qxd4
e2e4 c7c5 g1f3 a7a6 d2d4 c5d4 d1d4
rnbqkbnr/1p1ppppp/p7/8/3QP3/5N2/PPP2PPP/RNB1KB1R b KQkq -

B28 Sicilian Defense: O'Kelly Variation, Quiet System
1. e4 c5 2. Nf3 a6 3. d3
e2e4 c7c5 g1f3 a7a6 d2d3
rnbqkbnr/1p1ppppp/p7/2p5/4P3/3P1N2/PPP2PPP/RNBQKB1R b KQkq -

B28 Sicilian Defense: O'Kelly Variation, Réti System
1. e4 c5 2. Nf3 a6 3. g3
e2e4 c7c5 g1f3 a7a6 g2g3
rnbqkbnr/1p1ppppp/p7/2p5/4P3/5NP1/PPPP1P1P/RNBQKB1R b KQkq -

B28 Sicilian Defense: O'Kelly Variation, Venice System
1. e4 c5 2. Nf3 a6 3. c3
e2e4 c7c5 g1f3 a7a6 c2c3
rnbqkbnr/1p1ppppp/p7/2p5/4P3/2P2N2/PP1P1PPP/RNBQKB1R b KQkq -

B28 Sicilian Defense: O'Kelly Variation, Venice System, Barcza Line
1. e4 c5 2. Nf3 a6 3. c3 Nf6
e2e4 c7c5 g1f3 a7a6 c2c3 g8f6
rnbqkb1r/1p1ppppp/p4n2/2p5/4P3/2P2N2/PP1P1PPP/RNBQKB1R w KQkq -

B28 Sicilian Defense: O'Kelly Variation, Venice System, Gambit Line
1. e4 c5 2. Nf3 a6 3. c3 d5 4. exd5 Nf6
e2e4 c7c5 g1f3 a7a6 c2c3 d7d5 e4d5 g8f6
rnbqkb1r/1p2pppp/p4n2/2pP4/8/2P2N2/PP1P1PPP/RNBQKB1R w KQkq -

B28 Sicilian Defense: O'Kelly Variation, Venice System, Ljubojevic Line
1. e4 c5 2. Nf3 a6 3. c3 b5
e2e4 c7c5 g1f3 a7a6 c2c3 b7b5
rnbqkbnr/3ppppp/p7/1pp5/4P3/2P2N2/PP1P1PPP/RNBQKB1R w KQkq -

B28 Sicilian Defense: O'Kelly Variation, Venice System, Steiner Line
1. e4 c5 2. Nf3 a6 3. c3 d6
e2e4 c7c5 g1f3 a7a6 c2c3 d7d6
rnbqkbnr/1p2pppp/p2p4/2p5/4P3/2P2N2/PP1P1PPP/RNBQKB1R w KQkq -

B28 Sicilian Defense: O'Kelly Variation, Wing Gambit
1. e4 c5 2. Nf3 a6 3. b4
e2e4 c7c5 g1f3 a7a6 b2b4
rnbqkbnr/1p1ppppp/p7/2p5/1P2P3/5N2/P1PP1PPP/RNBQKB1R b KQkq -

B28 Sicilian Defense: O'Kelly Variation, Yerevan System
1. e4 c5 2. Nf3 a6 3. Nc3
e2e4 c7c5 g1f3 a7a6 b1c3
rnbqkbnr/1p1ppppp/p7/2p5/4P3/2N2N2/PPPP1PPP/R1BQKB1R b KQkq -

B29 Sicilian Defense: Nimzowitsch Variation
1. e4 c5 2. Nf3 Nf6
e2e4 c7c5 g1f3 g8f6
rnbqkb1r/pp1ppppp/5n2/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -

B29 Sicilian Defense: Nimzowitsch Variation, Advance Variation
1. e4 c5 2. Nf3 Nf6 3. e5
e2e4 c7c5 g1f3 g8f6 e4e5
rnbqkb1r/pp1ppppp/5n2/2p1P3/8/5N2/PPPP1PPP/RNBQKB1R b KQkq -

B29 Sicilian Defense: Nimzowitsch Variation, Closed Variation
1. e4 c5 2. Nf3 Nf6 3. Nc3
e2e4 c7c5 g1f3 g8f6 b1c3
rnbqkb1r/pp1ppppp/5n2/2p5/4P3/2N2N2/PPPP1PPP/R1BQKB1R b KQkq -

B29 Sicilian Defense: Nimzowitsch Variation, Exchange Variation
1. e4 c5 2. Nf3 Nf6 3. e5 Nd5 4. Nc3 Nxc3
e2e4 c7c5 g1f3 g8f6 e4e5 f6d5 b1c3 d5c3
rnbqkb1r/pp1ppppp/8/2p1P3/8/2n2N2/PPPP1PPP/R1BQKB1R w KQkq -

B29 Sicilian Defense: Nimzowitsch Variation, Main Line
1. e4 c5 2. Nf3 Nf6 3. e5 Nd5 4. Nc3 e6 5. Nxd5 exd5 6. d4 Nc6
e2e4 c7c5 g1f3 g8f6 e4e5 f6d5 b1c3 e7e6 c3d5 e6d5 d2d4 b8c6
r1bqkb1r/pp1p1ppp/2n5/2ppP3/3P4/5N2/PPP2PPP/R1BQKB1R w KQkq -

B30 Sicilian Defense: Closed, Anti-Sveshnikov Variation, Kharlov-Kramnik Line
1. e4 c5 2. Nf3 Nc6 3. Nc3 e5 4. Bc4 Be7 5. d3 d6 6. Nd2 Bg5
e2e4 c7c5 g1f3 b8c6 b1c3 e7e5 f1c4 f8e7 d2d3 d7d6 f3d2 e7g5
r1bqk1nr/pp3ppp/2np4/2p1p1b1/2B1P3/2NP4/PPPN1PPP/R1BQK2R w KQkq -

B30 Sicilian Defense: Closed, Anti-Sveshnikov Variation, with Nf6
1. e4 c5 2. Nf3 Nc6 3. Nc3 e5 4. Bc4 Be7 5. d3 Nf6
e2e4 c7c5 g1f3 b8c6 b1c3 e7e5 f1c4 f8e7 d2d3 g8f6
r1bqk2r/pp1pbppp/2n2n2/2p1p3/2B1P3/2NP1N2/PPP2PPP/R1BQK2R w KQkq -

B30 Sicilian Defense: Closed, Anti-Sveshnikov Variation, with d6
1. e4 c5 2. Nf3 Nc6 3. Nc3 e5 4. Bc4 Be7 5. d3 d6
e2e4 c7c5 g1f3 b8c6 b1c3 e7e5 f1c4 f8e7 d2d3 d7d6
r1bqk1nr/pp2bppp/2np4/2p1p3/2B1P3/2NP1N2/PPP2PPP/R1BQK2R w KQkq -

B30 Sicilian Defense: Nyezhmetdinov-Rossolimo Attack
1. e4 c5 2. Nf3 Nc6 3. Bb5
e2e4 c7c5 g1f3 b8c6 f1b5
r1bqkbnr/pp1ppppp/2n5/1Bp5/4P3/5N2/PPPP1PPP/RNBQK2R b KQkq -

B30 Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, San Francisco Gambit
1. e4 c5 2. Nf3 Nc6 3. Bb5 Na5 4. b4
e2e4 c7c5 g1f3 b8c6 f1b5 c6a5 b2b4
r1bqkbnr/pp1ppppp/8/nBp5/1P2P3/5N2/P1PP1PPP/RNBQK2R b KQkq -

B30 Sicilian Defense: Old Sicilian
1. e4 c5 2. Nf3 Nc6
e2e4 c7c5 g1f3 b8c6
r1bqkbnr/pp1ppppp/2n5/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -

B30 Sicilian Defense: Portsmouth Gambit
1. e4 c5 2. Nf3 Nc6 3. b4
e2e4 c7c5 g1f3 b8c6 b2b4
r1bqkbnr/pp1ppppp/2n5/2p5/1P2P3/5N2/P1PP1PPP/RNBQKB1R b KQkq -

B30 Sicilian Defense: Rossolimo Variation, Brooklyn Retreat Defense
1. e4 c5 2. Nf3 Nc6 3. Bb5 Nb8
e2e4 c7c5 g1f3 b8c6 f1b5 c6b8
rnbqkbnr/pp1ppppp/8/1Bp5/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -

B31 Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation
1. e4 c5 2. Nf3 Nc6 3. Bb5 g6
e2e4 c7c5 g1f3 b8c6 f1b5 g7g6
r1bqkbnr/pp1ppp1p/2n3p1/1Bp5/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -

B31 Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation, Gufeld Gambit
1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. O-O Bg7 5. c3 e5 6. d4
e2e4 c7c5 g1f3 b8c6 f1b5 g7g6 e1g1 f8g7 c2c3 e7e5 d2d4
r1bqk1nr/pp1p1pbp/2n3p1/1Bp1p3/3PP3/2P2N2/PP3PPP/RNBQ1RK1 b kq -

B31 Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation, Lutikov Gambit
1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. O-O Bg7 5. c3 Nf6 6. d4
e2e4 c7c5 g1f3 b8c6 f1b5 g7g6 e1g1 f8g7 c2c3 g8f6 d2d4
r1bqk2r/pp1pppbp/2n2np1/1Bp5/3PP3/2P2N2/PP3PPP/RNBQ1RK1 b kq -

B31 Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation, Totsky Attack
1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. O-O Bg7 5. c3 Nf6 6. Qa4
e2e4 c7c5 g1f3 b8c6 f1b5 g7g6 e1g1 f8g7 c2c3 g8f6 d1a4
r1bqk2r/pp1pppbp/2n2np1/1Bp5/Q3P3/2P2N2/PP1P1PPP/RNB2RK1 b kq -

B31 Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Gurgenidze Variation
1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. O-O Bg7 5. Re1 e5 6. b4
e2e4 c7c5 g1f3 b8c6 f1b5 g7g6 e1g1 f8g7 f1e1 e7e5 b2b4
r1bqk1nr/pp1p1pbp/2n3p1/1Bp1p3/1P2P3/5N2/P1PP1PPP/RNBQR1K1 b kq -

B32 Sicilian Defense: Accelerated Dragon
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6
r1bqkbnr/pp1ppp1p/2n3p1/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -

B32 Sicilian Defense: Flohr Variation
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Qc7
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 d8c7
r1b1kbnr/ppqppppp/2n5/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -

B32 Sicilian Defense: Franco-Sicilian Variation
1. e4 c5 2. Nf3 Nc6 3. d4 e6
e2e4 c7c5 g1f3 b8c6 d2d4 e7e6
r1bqkbnr/pp1p1ppp/2n1p3/2p5/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq -

B32 Sicilian Defense: Godiva Variation
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Qb6
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 d8b6
r1b1kbnr/pp1ppppp/1qn5/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -

B32 Sicilian Defense: Kalashnikov Variation
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 5. Nb5 d6
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 e7e5 d4b5 d7d6
r1bqkbnr/pp3ppp/2np4/1N2p3/4P3/8/PPP2PPP/RNBQKB1R w KQkq -

B32 Sicilian Defense: Löwenthal Variation
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 e7e5
r1bqkbnr/pp1p1ppp/2n5/4p3/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -

B32 Sicilian Defense: Nimzo-American Variation
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 d5
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 d7d5
r1bqkbnr/pp2pppp/2n5/3p4/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -

B32 Sicilian Defense: O'Kelly Variation, Maróczy Bind, Geller Line
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 a6 5. c4 e5
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 a7a6 c2c4 e7e5
r1bqkbnr/1p1p1ppp/p1n5/4p3/2PNP3/8/PP3PPP/RNBQKB1R w KQkq -

B32 Sicilian Defense: Open
1. e4 c5 2. Nf3 Nc6 3. d4
e2e4 c7c5 g1f3 b8c6 d2d4
r1bqkbnr/pp1ppppp/2n5/2p5/3PP3/5N2/PPP2PPP/RNBQKB1R b KQkq -

B32 Sicilian Defense: Open
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4
r1bqkbnr/pp1ppppp/2n5/8/3pP3/5N2/PPP2PPP/RNBQKB1R w KQkq -

B32 Sicilian Defense: Open
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4
r1bqkbnr/pp1ppppp/2n5/8/3NP3/8/PPP2PPP/RNBQKB1R b KQkq -

B33 Sicilian Defense: Four Knights Variation, Cobra Variation
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bc5
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e6 d4b5 f8c5
r1bqk2r/pp1p1ppp/2n1pn2/1Nb5/4P3/2N5/PPP2PPP/R1BQKB1R w KQkq -

B33 Sicilian Defense: Lasker-Pelikan Variation
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e5
r1bqkb1r/pp1p1ppp/2n2n2/4p3/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq -

B33 Sicilian Defense: Lasker-Pelikan Variation, Bird Variation
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 Be6
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e5 d4b5 d7d6 c1g5 a7a6 b5a3 c8e6
r2qkb1r/1p3ppp/p1npbn2/4p1B1/4P3/N1N5/PPP2PPP/R2QKB1R w KQkq -

B33 Sicilian Defense: Lasker-Pelikan Variation, Exchange Variation
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Nxc6
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e5 d4c6
r1bqkb1r/pp1p1ppp/2N2n2/4p3/4P3/2N5/PPP2PPP/R1BQKB1R b KQkq -

B33 Sicilian Defense: Lasker-Pelikan Variation, Retreat Variation
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Nf3
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e5 d4f3
r1bqkb1r/pp1p1ppp/2n2n2/4p3/4P3/2N2N2/PPP2PPP/R1BQKB1R b KQkq -

B33 Sicilian Defense: Lasker-Pelikan Variation, Schlechter Variation
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Nb3
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e5 d4b3
r1bqkb1r/pp1p1ppp/2n2n2/4p3/4P3/1NN5/PPP2PPP/R1BQKB1R b KQkq -

B33 Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e5 d4b5 d7d6 c1g5 a7a6 b5a3 b7b5
r1bqkb1r/5ppp/p1np1n2/1p2p1B1/4P3/N1N5/PPP2PPP/R2QKB1R w KQkq -

B33 Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation
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
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e5 d4b5 d7d6 c1g5 a7a6 b5a3 b7b5 g5f6 g7f6 c3d5 f6f5
r1bqkb1r/5p1p/p1np4/1p1Npp2/4P3/N7/PPP2PPP/R2QKB1R w KQkq -

B33 Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Chelyabinsk Variation
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
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e5 d4b5 d7d6 c1g5 a7a6 b5a3 b7b5 c3d5
r1bqkb1r/5ppp/p1np1n2/1p1Np1B1/4P3/N7/PPP2PPP/R2QKB1R b KQkq -

B33 Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Novosibirsk Variation
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
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e5 d4b5 d7d6 c1g5 a7a6 b5a3 b7b5 g5f6 g7f6 c3d5 f8g7
r1bqk2r/5pbp/p1np1p2/1p1Np3/4P3/N7/PPP2PPP/R2QKB1R w KQkq -

B33 Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Peresypkin's Sacrifice
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
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e5 d4b5 d7d6 c1g5 a7a6 b5a3 b7b5 g5f6 g7f6 c3d5 f6f5 f1b5
r1bqkb1r/5p1p/p1np4/1B1Npp2/4P3/N7/PPP2PPP/R2QK2R b KQkq -

B33 Sicilian Defense: Open
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6
r1bqkb1r/pp1ppppp/2n2n2/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -

B34 Sicilian Defense: Accelerated Dragon, Exchange Variation
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nxc6
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 d4c6
r1bqkbnr/pp1ppp1p/2N3p1/8/4P3/8/PPP2PPP/RNBQKB1R b KQkq -

B34 Sicilian Defense: Accelerated Dragon, Modern Variation
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 b1c3
r1bqkbnr/pp1ppp1p/2n3p1/8/3NP3/2N5/PPP2PPP/R1BQKB1R b KQkq -

B35 Sicilian Defense: Accelerated Dragon, Modern Bc4 Variation
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 Nf6 7. Bc4
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 b1c3 f8g7 c1e3 g8f6 f1c4
r1bqk2r/pp1pppbp/2n2np1/8/2BNP3/2N1B3/PPP2PPP/R2QK2R b KQkq -

B35 Sicilian Defense: Dragon Variation, Modern Bc4 Variation
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 Nf6 7. Bc4 d6
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 b1c3 f8g7 c1e3 g8f6 f1c4 d7d6
r1bqk2r/pp2ppbp/2np1np1/8/2BNP3/2N1B3/PPP2PPP/R2QK2R w KQkq -

B36 Sicilian Defense: Accelerated Dragon, Maróczy Bind
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 c2c4
r1bqkbnr/pp1ppp1p/2n3p1/8/2PNP3/8/PP3PPP/RNBQKB1R b KQkq -

B36 Sicilian Defense: Accelerated Dragon, Maróczy Bind, Gurgenidze Variation
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 Nf6 6. Nc3 Nxd4 7. Qxd4 d6
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 c2c4 g8f6 b1c3 c6d4 d1d4 d7d6
r1bqkb1r/pp2pp1p/3p1np1/8/2PQP3/2N5/PP3PPP/R1B1KB1R w KQkq -

B37 Sicilian Defense: Accelerated Dragon, Maróczy Bind
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 Bg7
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 c2c4 f8g7
r1bqk1nr/pp1pppbp/2n3p1/8/2PNP3/8/PP3PPP/RNBQKB1R w KQkq -

B37 Sicilian Defense: Accelerated Dragon, Simagin Variation
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 Bg7 6. Nc2 d6 7. Be2 Nh6
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 c2c4 f8g7 d4c2 d7d6 f1e2 g8h6
r1bqk2r/pp2ppbp/2np2pn/8/2P1P3/8/PPN1BPPP/RNBQK2R w KQkq -

B38 Sicilian Defense: Accelerated Dragon, Maróczy Bind
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 Bg7 6. Be3
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 c2c4 f8g7 c1e3
r1bqk1nr/pp1pppbp/2n3p1/8/2PNP3/4B3/PP3PPP/RN1QKB1R b KQkq -

B39 Sicilian Defense: Accelerated Dragon, Maróczy Bind, Breyer Variation
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 Bg7 6. Be3 Nf6 7. Nc3 Ng4
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 c2c4 f8g7 c1e3 g8f6 b1c3 f6g4
r1bqk2r/pp1pppbp/2n3p1/8/2PNP1n1/2N1B3/PP3PPP/R2QKB1R w KQkq -

B40 Sicilian Defense: Alapin Variation, Sherzer Variation
1. e4 c5 2. Nf3 e6 3. c3 Nf6 4. e5 Nd5 5. d4 Nc6
e2e4 c7c5 g1f3 e7e6 c2c3 g8f6 e4e5 f6d5 d2d4 b8c6
r1bqkb1r/pp1p1ppp/2n1p3/2pnP3/3P4/2P2N2/PP3PPP/RNBQKB1R w KQkq -

B40 Sicilian Defense: Delayed Alapin Variation, with e6
1. e4 c5 2. Nf3 e6 3. c3
e2e4 c7c5 g1f3 e7e6 c2c3
rnbqkbnr/pp1p1ppp/4p3/2p5/4P3/2P2N2/PP1P1PPP/RNBQKB1R b KQkq -

B40 Sicilian Defense: Drazic Variation
1. e4 c5 2. Nf3 e6 3. d4 a6
e2e4 c7c5 g1f3 e7e6 d2d4 a7a6
rnbqkbnr/1p1p1ppp/p3p3/2p5/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq -

B40 Sicilian Defense: Four Knights Variation
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6
r1bqkb1r/pp1p1ppp/2n1pn2/8/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq -

B40 Sicilian Defense: Four Knights Variation, Exchange Variation
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Nxc6
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 d4c6
r1bqkb1r/pp1p1ppp/2N1pn2/8/4P3/2N5/PPP2PPP/R1BQKB1R b KQkq -

B40 Sicilian Defense: French Variation
1. e4 c5 2. Nf3 e6
e2e4 c7c5 g1f3 e7e6
rnbqkbnr/pp1p1ppp/4p3/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -

B40 Sicilian Defense: French Variation, Normal
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6
rnbqkb1r/pp1p1ppp/4pn2/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -

B40 Sicilian Defense: French Variation, Open
1. e4 c5 2. Nf3 e6 3. d4 cxd4
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4
rnbqkbnr/pp1p1ppp/4p3/8/3pP3/5N2/PPP2PPP/RNBQKB1R w KQkq -

B40 Sicilian Defense: French Variation, Westerinen Attack
1. e4 c5 2. Nf3 e6 3. b3
e2e4 c7c5 g1f3 e7e6 b2b3
rnbqkbnr/pp1p1ppp/4p3/2p5/4P3/1P3N2/P1PP1PPP/RNBQKB1R b KQkq -

B40 Sicilian Defense: Gaw-Paw Variation
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Qb6
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 d8b6
rnb1kb1r/pp1p1ppp/1q2pn2/8/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq -

B40 Sicilian Defense: Kan Variation, Wing Attack, Fianchetto Variation
1. e4 c5 2. Nf3 e6 3. Nc3 a6 4. g3 b5 5. d4 cxd4 6. Nxd4
e2e4 c7c5 g1f3 e7e6 b1c3 a7a6 g2g3 b7b5 d2d4 c5d4 f3d4
rnbqkbnr/3p1ppp/p3p3/1p6/3NP3/2N3P1/PPP2P1P/R1BQKB1R b KQkq -

B40 Sicilian Defense: Kramnik Variation
1. e4 c5 2. Nf3 e6 3. c4
e2e4 c7c5 g1f3 e7e6 c2c4
rnbqkbnr/pp1p1ppp/4p3/2p5/2P1P3/5N2/PP1P1PPP/RNBQKB1R b KQkq -

B40 Sicilian Defense: Kveinis Variation
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Qb6
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 d8b6
rnb1kbnr/pp1p1ppp/1q2p3/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -

B40 Sicilian Defense: Marshall Counterattack
1. e4 c5 2. Nf3 e6 3. d4 d5
e2e4 c7c5 g1f3 e7e6 d2d4 d7d5
rnbqkbnr/pp3ppp/4p3/2pp4/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq -

B40 Sicilian Defense: Paulsen-Basman Defense
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Bc5
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 f8c5
rnbqk1nr/pp1p1ppp/4p3/2b5/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -

B40 Sicilian Defense: Pin Variation
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Bb4
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 f8b4
rnbqk2r/pp1p1ppp/4pn2/8/1b1NP3/2N5/PPP2PPP/R1BQKB1R w KQkq -

B40 Sicilian Defense: Pin Variation, Jaffe Variation
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Bb4 6. Bd3 e5
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 f8b4 f1d3 e6e5
rnbqk2r/pp1p1ppp/5n2/4p3/1b1NP3/2NB4/PPP2PPP/R1BQK2R w KQkq -

B40 Sicilian Defense: Pin Variation, Koch Variation
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Bb4 6. e5
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 f8b4 e4e5
rnbqk2r/pp1p1ppp/4pn2/4P3/1b1N4/2N5/PPP2PPP/R1BQKB1R b KQkq -

B40 Sicilian Defense: Smith-Morra Gambit Deferred
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. c3
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 c2c3
rnbqkbnr/pp1p1ppp/4p3/8/3pP3/2P2N2/PP3PPP/RNBQKB1R b KQkq -

B40 Sicilian Defense: Wing Gambit Deferred
1. e4 c5 2. Nf3 e6 3. b4
e2e4 c7c5 g1f3 e7e6 b2b4
rnbqkbnr/pp1p1ppp/4p3/2p5/1P2P3/5N2/P1PP1PPP/RNBQKB1R b KQkq -

B41 Sicilian Defense: Kan Variation
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 a7a6
rnbqkbnr/1p1p1ppp/p3p3/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -

B41 Sicilian Defense: Kan Variation, Maróczy Bind, Bronstein Variation
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. c4 Nf6 6. Nc3 Bb4 7. Bd3 Nc6
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 a7a6 c2c4 g8f6 b1c3 f8b4 f1d3 b8c6
r1bqk2r/1p1p1ppp/p1n1pn2/8/1bPNP3/2NB4/PP3PPP/R1BQK2R w KQkq -

B41 Sicilian Defense: Kan Variation, Maróczy Bind, Bronstein Variation
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. c4 Nf6 6. Nc3 Bb4 7. Bd3 Nc6 8. Bc2
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 a7a6 c2c4 g8f6 b1c3 f8b4 f1d3 b8c6 d3c2
r1bqk2r/1p1p1ppp/p1n1pn2/8/1bPNP3/2N5/PPB2PPP/R1BQK2R b KQkq -

B41 Sicilian Defense: Kan Variation, Maróczy Bind, Hedgehog Variation
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. c4 g6
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 a7a6 c2c4 g7g6
rnbqkbnr/1p1p1p1p/p3p1p1/8/2PNP3/8/PP3PPP/RNBQKB1R w KQkq -

B41 Sicilian Defense: Kan Variation, Maróczy Bind, Réti Variation
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. c4
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 a7a6 c2c4
rnbqkbnr/1p1p1ppp/p3p3/8/2PNP3/8/PP3PPP/RNBQKB1R b KQkq -

B42 Sicilian Defense: Kan Variation, Gipslis Variation
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Nf6 6. O-O d6 7. c4 g6
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 a7a6 f1d3 g8f6 e1g1 d7d6 c2c4 g7g6
rnbqkb1r/1p3p1p/p2ppnp1/8/2PNP3/3B4/PP3PPP/RNBQ1RK1 w kq -

B42 Sicilian Defense: Kan Variation, Modern Variation
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 a7a6 f1d3
rnbqkbnr/1p1p1ppp/p3p3/8/3NP3/3B4/PPP2PPP/RNBQK2R b KQkq -

B42 Sicilian Defense: Kan Variation, Polugaevsky Variation
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Bc5
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 a7a6 f1d3 f8c5
rnbqk1nr/1p1p1ppp/p3p3/2b5/3NP3/3B4/PPP2PPP/RNBQK2R w KQkq -

B42 Sicilian Defense: Kan Variation, Swiss Cheese Variation
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 g6
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 a7a6 f1d3 g7g6
rnbqkbnr/1p1p1p1p/p3p1p1/8/3NP3/3B4/PPP2PPP/RNBQK2R w KQkq -

B43 Sicilian Defense: Kan Variation, Knight Variation
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 a7a6 b1c3
rnbqkbnr/1p1p1ppp/p3p3/8/3NP3/2N5/PPP2PPP/R1BQKB1R b KQkq -

B43 Sicilian Defense: Kan Variation, Wing Attack
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 b5
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 a7a6 b1c3 b7b5
rnbqkbnr/3p1ppp/p3p3/1p6/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq -

B43 Sicilian Defense: Kan Variation, Wing Attack, Christiansen's Dream
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 b5 6. Bd3 Qb6 7. Be3 Bc5 8. Qg4
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 a7a6 b1c3 b7b5 f1d3 d8b6 c1e3 f8c5 d1g4
rnb1k1nr/3p1ppp/pq2p3/1pb5/3NP1Q1/2NBB3/PPP2PPP/R3K2R b KQkq -

B43 Sicilian Defense: Kan Variation, Wing Attack, Spraggett Attack
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 b5 6. Bd3 Qb6 7. Nf3
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 a7a6 b1c3 b7b5 f1d3 d8b6 d4f3
rnb1kbnr/3p1ppp/pq2p3/1p6/4P3/2NB1N2/PPP2PPP/R1BQK2R b KQkq -

B44 Sicilian Defense: Taimanov Variation
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6
r1bqkbnr/pp1p1ppp/2n1p3/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -

B44 Sicilian Defense: Taimanov Variation, Gary Gambit
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nb5 d6 6. c4 Nf6 7. N1c3 a6 8. Na3 d5
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 d4b5 d7d6 c2c4 g8f6 b1c3 a7a6 b5a3 d6d5
r1bqkb1r/1p3ppp/p1n1pn2/3p4/2P1P3/N1N5/PP3PPP/R1BQKB1R w KQkq -

B44 Sicilian Defense: Taimanov Variation, Modern Line
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
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 d4b5 d7d6 c2c4 g8f6 b1c3 a7a6 b5a3 f8e7 f1e2 e8g8 e1g1 b7b6
r1bq1rk1/4bppp/ppnppn2/8/2P1P3/N1N5/PP2BPPP/R1BQ1RK1 w - -

B44 Sicilian Defense: Taimanov Variation, Szén Variation
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nb5
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 d4b5
r1bqkbnr/pp1p1ppp/2n1p3/1N6/4P3/8/PPP2PPP/RNBQKB1R b KQkq -

B45 Sicilian Defense: Taimanov Variation, American Attack
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Nf6 6. Ndb5 Bb4 7. Nd6+
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 b1c3 g8f6 d4b5 f8b4 b5d6
r1bqk2r/pp1p1ppp/2nNpn2/8/1b2P3/2N5/PPP2PPP/R1BQKB1R b KQkq -

B45 Sicilian Defense: Taimanov Variation, Normal Variation
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 b1c3
r1bqkbnr/pp1p1ppp/2n1p3/8/3NP3/2N5/PPP2PPP/R1BQKB1R b KQkq -

B46 Sicilian Defense: Taimanov Variation
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 a6
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 b1c3 a7a6
r1bqkbnr/1p1p1ppp/p1n1p3/8/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq -

B47 Sicilian Defense: Taimanov Variation, Bastrikov Variation
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 b1c3 d8c7
r1b1kbnr/ppqp1ppp/2n1p3/8/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq -

B47 Sicilian Defense: Taimanov Variation, Bastrikov Variation, Ponomariov Gambit
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Ndb5 Qb8 7. Be3 a6 8. Bb6
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 b1c3 d8c7 d4b5 c7b8 c1e3 a7a6 e3b6
rqb1kbnr/1p1p1ppp/pBn1p3/1N6/4P3/2N5/PPP2PPP/R2QKB1R b KQkq -

B48 Sicilian Defense: Taimanov Variation, Bastrikov Variation, English Attack
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be3
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 b1c3 d8c7 c1e3
r1b1kbnr/ppqp1ppp/2n1p3/8/3NP3/2N1B3/PPP2PPP/R2QKB1R b KQkq -

B49 Sicilian Defense: Taimanov Variation, Bastrikov Variation
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be3 a6 7. Be2
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 b1c3 d8c7 c1e3 a7a6 f1e2
r1b1kbnr/1pqp1ppp/p1n1p3/8/3NP3/2N1B3/PPP1BPPP/R2QK2R b KQkq -

B50 Sicilian Defense
1. e4 c5 2. Nf3 d6 3. d4
e2e4 c7c5 g1f3 d7d6 d2d4
rnbqkbnr/pp2pppp/3p4/2p5/3PP3/5N2/PPP2PPP/RNBQKB1R b KQkq -

B50 Sicilian Defense
1. e4 c5 2. Nf3 d6 3. d4 cxd4
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4
rnbqkbnr/pp2pppp/3p4/8/3pP3/5N2/PPP2PPP/RNBQKB1R w KQkq -

B50 Sicilian Defense: Delayed Alapin Variation, Basman-Palatnik Double Gambit
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
e2e4 c7c5 g1f3 d7d6 c2c3 g8f6 f1e2 b8c6 d2d4 c5d4 c3d4 f6e4 d4d5 d8a5 b1c3 e4c3 b2c3
r1b1kb1r/pp2pppp/2np4/q2P4/8/2P2N2/P3BPPP/R1BQK2R b KQkq -

B50 Sicilian Defense: Delayed Alapin Variation, Basman-Palatnik Gambit
1. e4 c5 2. Nf3 d6 3. c3 Nf6 4. Be2 Nc6 5. d4 cxd4 6. cxd4 Nxe4
e2e4 c7c5 g1f3 d7d6 c2c3 g8f6 f1e2 b8c6 d2d4 c5d4 c3d4 f6e4
r1bqkb1r/pp2pppp/2np4/8/3Pn3/5N2/PP2BPPP/RNBQK2R w KQkq -

B50 Sicilian Defense: Delayed Alapin Variation, with d6
1. e4 c5 2. Nf3 d6 3. c3
e2e4 c7c5 g1f3 d7d6 c2c3
rnbqkbnr/pp2pppp/3p4/2p5/4P3/2P2N2/PP1P1PPP/RNBQKB1R b KQkq -

B50 Sicilian Defense: Kopec System
1. e4 c5 2. Nf3 d6 3. Bd3
e2e4 c7c5 g1f3 d7d6 f1d3
rnbqkbnr/pp2pppp/3p4/2p5/4P3/3B1N2/PPPP1PPP/RNBQK2R b KQkq -

B50 Sicilian Defense: Kotov Gambit
1. e4 c5 2. Nf3 d6 3. g3 b5
e2e4 c7c5 g1f3 d7d6 g2g3 b7b5
rnbqkbnr/p3pppp/3p4/1pp5/4P3/5NP1/PPPP1P1P/RNBQKB1R w KQkq -

B50 Sicilian Defense: Modern Variations
1. e4 c5 2. Nf3 d6
e2e4 c7c5 g1f3 d7d6
rnbqkbnr/pp2pppp/3p4/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -

B50 Sicilian Defense: Modern Variations, Anti-Qxd4 Move Order
1. e4 c5 2. Nf3 d6 3. d4 Nf6
e2e4 c7c5 g1f3 d7d6 d2d4 g8f6
rnbqkb1r/pp2pppp/3p1n2/2p5/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq -

B50 Sicilian Defense: Modern Variations, Anti-Qxd4 Move Order Accepted
1. e4 c5 2. Nf3 d6 3. d4 Nf6 4. dxc5 Nxe4
e2e4 c7c5 g1f3 d7d6 d2d4 g8f6 d4c5 f6e4
rnbqkb1r/pp2pppp/3p4/2P5/4n3/5N2/PPP2PPP/RNBQKB1R w KQkq -

B50 Sicilian Defense: Modern Variations, Tartakower
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. c3
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 c2c3
rnbqkbnr/pp2pppp/3p4/8/3pP3/2P2N2/PP3PPP/RNBQKB1R b KQkq -

B50 Sicilian Defense: Wing Gambit, Deferred Variation
1. e4 c5 2. Nf3 d6 3. b4
e2e4 c7c5 g1f3 d7d6 b2b4
rnbqkbnr/pp2pppp/3p4/2p5/1P2P3/5N2/P1PP1PPP/RNBQKB1R b KQkq -

B51 Sicilian Defense: Moscow Variation
1. e4 c5 2. Nf3 d6 3. Bb5+
e2e4 c7c5 g1f3 d7d6 f1b5
rnbqkbnr/pp2pppp/3p4/1Bp5/4P3/5N2/PPPP1PPP/RNBQK2R b KQkq -

B51 Sicilian Defense: Moscow Variation, Dorfman Gambit
1. e4 c5 2. Nf3 d6 3. Bb5+ Nc6 4. O-O Bd7 5. Qe2 g6 6. e5
e2e4 c7c5 g1f3 d7d6 f1b5 b8c6 e1g1 c8d7 d1e2 g7g6 e4e5
r2qkbnr/pp1bpp1p/2np2p1/1Bp1P3/8/5N2/PPPPQPPP/RNB2RK1 b kq -

B51 Sicilian Defense: Moscow Variation, Moscow Gambit
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
e2e4 c7c5 g1f3 d7d6 f1b5 b8c6 e1g1 c8d7 c2c3 g8f6 f1e1 a7a6 b5c6 d7c6 d2d4 c6e4 c1g5
r2qkb1r/1p2pppp/p2p1n2/2p3B1/3Pb3/2P2N2/PP3PPP/RN1QR1K1 b kq -

B52 Sicilian Defense: Moscow Variation, Haag Gambit
1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. O-O Nc6 6. c3 Nf6 7. d4
e2e4 c7c5 g1f3 d7d6 f1b5 c8d7 b5d7 d8d7 e1g1 b8c6 c2c3 g8f6 d2d4
r3kb1r/pp1qpppp/2np1n2/2p5/3PP3/2P2N2/PP3PPP/RNBQ1RK1 b kq -

B52 Sicilian Defense: Moscow Variation, Main Line
1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7
e2e4 c7c5 g1f3 d7d6 f1b5 c8d7
rn1qkbnr/pp1bpppp/3p4/1Bp5/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -

B52 Sicilian Defense: Moscow Variation, Sokolsky Variation
1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. c4
e2e4 c7c5 g1f3 d7d6 f1b5 c8d7 b5d7 d8d7 c2c4
rn2kbnr/pp1qpppp/3p4/2p5/2P1P3/5N2/PP1P1PPP/RNBQK2R b KQkq -

B53 Sicilian Defense: Chekhover Variation
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 d1d4
rnbqkbnr/pp2pppp/3p4/8/3QP3/5N2/PPP2PPP/RNB1KB1R b KQkq -

B53 Sicilian Defense: Chekhover Variation, Zaitsev Defense
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 Qd7
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 d1d4 b8c6 f1b5 d8d7
r1b1kbnr/pp1qpppp/2np4/1B6/3QP3/5N2/PPP2PPP/RNB1K2R w KQkq -

B54 Sicilian Defense: Dragon Variation, Accelerated Dragon
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 g6
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g7g6
rnbqkbnr/pp2pp1p/3p2p1/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -

B54 Sicilian Defense: Modern Variations, Ginsberg Gambit
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Bc4
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 f1c4
rnbqkb1r/pp2pppp/3p1n2/8/2BNP3/8/PPP2PPP/RNBQK2R b KQkq -

B54 Sicilian Defense: Modern Variations, Main Line
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6
rnbqkb1r/pp2pppp/3p1n2/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -

B54 Sicilian Defense: Prins Variation
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. f3
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 f2f3
rnbqkb1r/pp2pppp/3p1n2/8/3NP3/5P2/PPP3PP/RNBQKB1R b KQkq -

B55 Sicilian Defense: Prins Variation, Venice Attack
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. f3 e5 6. Bb5+
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 f2f3 e7e5 f1b5
rnbqkb1r/pp3ppp/3p1n2/1B2p3/3NP3/5P2/PPP3PP/RNBQK2R b KQkq -

B56 Sicilian Defense: Classical Variation
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6
r1bqkb1r/pp2pppp/2np1n2/8/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq -

B56 Sicilian Defense: Classical Variation, Fianchetto Variation
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. g3
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 g2g3
r1bqkb1r/pp2pppp/2np1n2/8/3NP3/2N3P1/PPP2P1P/R1BQKB1R b KQkq -

B56 Sicilian Defense: Kupreichik Variation
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Bd7
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 c8d7
rn1qkb1r/pp1bpppp/3p1n2/8/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq -

B56 Sicilian Defense: Spielmann Variation
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Nde2
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 d4e2
r1bqkb1r/pp2pppp/2np1n2/8/4P3/2N5/PPP1NPPP/R1BQKB1R b KQkq -

B56 Sicilian Defense: Venice Attack
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Bb5+
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e5 f1b5
rnbqkb1r/pp3ppp/3p1n2/1B2p3/3NP3/2N5/PPP2PPP/R1BQK2R b KQkq -

B56 Sicilian Defense: Yates Variation
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bd3
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1d3
r1bqkb1r/pp2pppp/2np1n2/8/3NP3/2NB4/PPP2PPP/R1BQK2R b KQkq -

B57 Sicilian Defense: Classical Variation, Anti-Sozin Variation
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bc4 Qb6
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1c4 d8b6
r1b1kb1r/pp2pppp/1qnp1n2/8/2BNP3/2N5/PPP2PPP/R1BQK2R w KQkq -

B57 Sicilian Defense: Classical Variation, Sozin Attack
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bc4
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 f1c4
r1bqkb1r/pp2pppp/2np1n2/8/2BNP3/2N5/PPP2PPP/R1BQK2R b KQkq -

B57 Sicilian Defense: Magnus Smith Trap
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bc4 g6 7. Nxc6 bxc6 8. e5
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1c4 g7g6 d4c6 b7c6 e4e5
r1bqkb1r/p3pp1p/2pp1np1/4P3/2B5/2N5/PPP2PPP/R1BQK2R b KQkq -

B58 Sicilian Defense: Boleslavsky Variation
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Be2 e5
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 f1e2 e7e5
r1bqkb1r/pp3ppp/2np1n2/4p3/3NP3/2N5/PPP1BPPP/R1BQK2R w KQkq -

B58 Sicilian Defense: Boleslavsky Variation, Louma Variation
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1e2 e7e5 d4c6
r1bqkb1r/pp3ppp/2Np1n2/4p3/4P3/2N5/PPP1BPPP/R1BQK2R b KQkq -

B58 Sicilian Defense: Classical Variation
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Be2
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 f1e2
r1bqkb1r/pp2pppp/2np1n2/8/3NP3/2N5/PPP1BPPP/R1BQK2R b KQkq -

B58 Sicilian Defense: Classical Variation, Dragon Transfer
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Be2 Nxd4 7. Qxd4 g6
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 f1e2 c6d4 d1d4 g7g6
r1bqkb1r/pp2pp1p/3p1np1/8/3QP3/2N5/PPP1BPPP/R1B1K2R w KQkq -

B59 Sicilian Defense: Boleslavsky Variation
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nb3
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1e2 e7e5 d4b3
r1bqkb1r/pp3ppp/2np1n2/4p3/4P3/1NN5/PPP1BPPP/R1BQK2R b KQkq -

B60 Sicilian Defense: Richter-Rauzer Variation
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5
r1bqkb1r/pp2pppp/2np1n2/6B1/3NP3/2N5/PPP2PPP/R2QKB1R b KQkq -

B60 Sicilian Defense: Richter-Rauzer Variation, Dragon Variation
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 g6
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 c1g5 g7g6
r1bqkb1r/pp2pp1p/2np1np1/6B1/3NP3/2N5/PPP2PPP/R2QKB1R w KQkq -

B60 Sicilian Defense: Richter-Rauzer Variation, Modern Variation
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 Bd7
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 c8d7
r2qkb1r/pp1bpppp/2np1n2/6B1/3NP3/2N5/PPP2PPP/R2QKB1R w KQkq -

B61 Sicilian Defense: Richter-Rauzer Variation, Modern Variation
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 Bd7 7. Qd2
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 c1g5 c8d7 d1d2
r2qkb1r/pp1bpppp/2np1n2/6B1/3NP3/2N5/PPPQ1PPP/R3KB1R b KQkq -

B62 Sicilian Defense: Richter-Rauzer Variation
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6
r1bqkb1r/pp3ppp/2nppn2/6B1/3NP3/2N5/PPP2PPP/R2QKB1R w KQkq -

B62 Sicilian Defense: Richter-Rauzer Variation
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd3
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 d1d3
r1bqkb1r/pp3ppp/2nppn2/6B1/3NP3/2NQ4/PPP2PPP/R3KB1R b KQkq -

B62 Sicilian Defense: Richter-Rauzer Variation, Exchange Variation
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Nxc6
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 d4c6
r1bqkb1r/pp3ppp/2Nppn2/6B1/4P3/2N5/PPP2PPP/R2QKB1R b KQkq -

B62 Sicilian Defense: Richter-Rauzer Variation, Podebrady Variation
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 e6 7. Nb3
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 c1g5 e7e6 d4b3
r1bqkb1r/pp3ppp/2nppn2/6B1/4P3/1NN5/PPP2PPP/R2QKB1R b KQkq -

B62 Sicilian Defense: Richter-Rauzer Variation, Vitolins Variation
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Bb5
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 f1b5
r1bqkb1r/pp3ppp/2nppn2/1B4B1/3NP3/2N5/PPP2PPP/R2QK2R b KQkq -

B63 Sicilian Defense: Richter-Rauzer Variation, Classical Variation
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 Be7
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 d1d2 f8e7
r1bqk2r/pp2bppp/2nppn2/6B1/3NP3/2N5/PPPQ1PPP/R3KB1R w KQkq -

B63 Sicilian Defense: Richter-Rauzer Variation, Classical Variation, Kantscher Line
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
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 d1d2 f8e7 e1c1 c6d4 d2d4 a7a6 f2f4 b7b5
r1bqk2r/4bppp/p2ppn2/1p4B1/3QPP2/2N5/PPP3PP/2KR1B1R w kq -

B63 Sicilian Defense: Richter-Rauzer Variation, Ivanov Variation
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 Qb6
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 d1d2 d8b6
r1b1kb1r/pp3ppp/1qnppn2/6B1/3NP3/2N5/PPPQ1PPP/R3KB1R w KQkq -

B63 Sicilian Defense: Richter-Rauzer Variation, Traditional Variation
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 d1d2
r1bqkb1r/pp3ppp/2nppn2/6B1/3NP3/2N5/PPPQ1PPP/R3KB1R b KQkq -

B64 Sicilian Defense: Richter-Rauzer Variation, Classical Variation
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
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 c1g5 e7e6 d1d2 f8e7 e1c1 e8g8 f2f4 e6e5
r1bq1rk1/pp2bppp/2np1n2/4p1B1/3NPP2/2N5/PPPQ2PP/2KR1B1R w - -

B64 Sicilian Defense: Richter-Rauzer Variation, Classical Variation
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
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 d1d2 f8e7 e1c1 e8g8 f2f4
r1bq1rk1/pp2bppp/2nppn2/6B1/3NPP2/2N5/PPPQ2PP/2KR1B1R b - -

B65 Sicilian Defense: Richter-Rauzer Variation, Classical Variation
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
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 d1d2 f8e7 e1c1 e8g8 f2f4 c6d4 d2d4
r1bq1rk1/pp2bppp/3ppn2/6B1/3QPP2/2N5/PPP3PP/2KR1B1R b - -

B65 Sicilian Defense: Richter-Rauzer Variation, Rauzer Attack
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
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 d1d2 f8e7 e1c1 e8g8 f2f4 c6d4
r1bq1rk1/pp2bppp/3ppn2/6B1/3nPP2/2N5/PPPQ2PP/2KR1B1R w - -

B66 Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation, Early Deviations
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 a6
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 d1d2 a7a6
r1bqkb1r/1p3ppp/p1nppn2/6B1/3NP3/2N5/PPPQ1PPP/R3KB1R w KQkq -

B67 Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation
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
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 c1g5 e7e6 d1d2 a7a6 e1c1 c8d7
r2qkb1r/1p1b1ppp/p1nppn2/6B1/3NP3/2N5/PPPQ1PPP/2KR1B1R w kq -

B68 Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation
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
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 c1g5 e7e6 d1d2 a7a6 e1c1 c8d7 f2f4 f8e7
r2qk2r/1p1bbppp/p1nppn2/6B1/3NPP2/2N5/PPPQ2PP/2KR1B1R w kq -

B69 Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation, Nyezhmetdinov Attack
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
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 c1g5 e7e6 d1d2 a7a6 e1c1 c8d7 f2f4 f8e7 d4f3 b7b5 g5f6
r2qk2r/3bbppp/p1nppB2/1p6/4PP2/2N2N2/PPPQ2PP/2KR1B1R b kq -

B70 Sicilian Defense: Dragon Variation
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6
rnbqkb1r/pp2pp1p/3p1np1/8/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq -

B70 Sicilian Defense: Dragon Variation, Classical Variation
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be2
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 f1e2
rnbqkb1r/pp2pp1p/3p1np1/8/3NP3/2N5/PPP1BPPP/R1BQK2R b KQkq -

B70 Sicilian Defense: Dragon Variation, Fianchetto Variation
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. g3
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 g2g3
rnbqkb1r/pp2pp1p/3p1np1/8/3NP3/2N3P1/PPP2P1P/R1BQKB1R b KQkq -

B71 Sicilian Defense: Dragon Variation, Levenfish Variation
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. f4
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 f2f4
rnbqkb1r/pp2pp1p/3p1np1/8/3NPP2/2N5/PPP3PP/R1BQKB1R b KQkq -

B71 Sicilian Defense: Dragon Variation, Levenfish Variation, Main Line
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. f4 Nbd7
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 f2f4 b8d7
r1bqkb1r/pp1npp1p/3p1np1/8/3NPP2/2N5/PPP3PP/R1BQKB1R w KQkq -

B72 Sicilian Defense: Dragon Variation
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3
rnbqkb1r/pp2pp1p/3p1np1/8/3NP3/2N1B3/PPP2PPP/R2QKB1R b KQkq -

B72 Sicilian Defense: Dragon Variation, Classical Variation
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f1e2
rnbqk2r/pp2ppbp/3p1np1/8/3NP3/2N1B3/PPP1BPPP/R2QK2R b KQkq -

B72 Sicilian Defense: Dragon Variation, Classical Variation
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 Nc6
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f1e2 b8c6
r1bqk2r/pp2ppbp/2np1np1/8/3NP3/2N1B3/PPP1BPPP/R2QK2R w KQkq -

B72 Sicilian Defense: Dragon Variation, Classical Variation
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 Nc6 8. Nb3
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f1e2 b8c6 d4b3
r1bqk2r/pp2ppbp/2np1np1/8/4P3/1NN1B3/PPP1BPPP/R2QK2R b KQkq -

B72 Sicilian Defense: Dragon Variation, Classical Variation, Amsterdam Variation
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 g6 7. Be3 Bg7 8. Qd2
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1e2 g7g6 c1e3 f8g7 d1d2
r1bqk2r/pp2ppbp/2np1np1/8/3NP3/2N1B3/PPPQBPPP/R3K2R b KQkq -

B72 Sicilian Defense: Dragon Variation, Classical Variation, Grigoriev Variation
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
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1e2 g7g6 c1e3 f8g7 d1d2 e8g8 e1c1
r1bq1rk1/pp2ppbp/2np1np1/8/3NP3/2N1B3/PPPQBPPP/2KR3R b - -

B73 Sicilian Defense: Dragon Variation, Classical Variation
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be2 Bg7 7. O-O Nc6 8. Be3
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 f1e2 f8g7 e1g1 b8c6 c1e3
r1bqk2r/pp2ppbp/2np1np1/8/3NP3/2N1B3/PPP1BPPP/R2Q1RK1 b kq -

B73 Sicilian Defense: Dragon Variation, Classical Variation, Battery Variation
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
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 f1e2 f8g7 e1g1 e8g8 c1e3 b8c6 d1d2
r1bq1rk1/pp2ppbp/2np1np1/8/3NP3/2N1B3/PPPQBPPP/R4RK1 b - -

B73 Sicilian Defense: Dragon Variation, Classical Variation, Zollner Gambit
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
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 c1e3 f8g7 f1e2 g8f6 b1c3 e8g8 e1g1 d7d6 f2f4 d8b6 e4e5
r1b2rk1/pp2ppbp/1qnp1np1/4P3/3N1P2/2N1B3/PPP1B1PP/R2Q1RK1 b - -

B74 Sicilian Defense: Dragon Variation, Classical Variation, Alekhine Line
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
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 b1c3 f8g7 c1e3 g8f6 f1e2 e8g8 e1g1 d7d6 d4b3 a7a5
r1bq1rk1/1p2ppbp/2np1np1/p7/4P3/1NN1B3/PPP1BPPP/R2Q1RK1 w - -

B74 Sicilian Defense: Dragon Variation, Classical Variation, Bernard Defense
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
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
r2q1rk1/pp2ppbp/5np1/n2p1P2/4P3/1NNPB3/PP4PP/R2Q1RK1 w - -

B74 Sicilian Defense: Dragon Variation, Classical Variation, Maróczy Line
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
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 f1e2 f8g7 e1g1 e8g8 c1e3 b8c6 d4b3 c8e6 f2f4 c6a5
r2q1rk1/pp2ppbp/3pbnp1/n7/4PP2/1NN1B3/PPP1B1PP/R2Q1RK1 w - -

B74 Sicilian Defense: Dragon Variation, Classical Variation, Normal Line
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
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 f1e2 f8g7 e1g1 e8g8 c1e3 b8c6 d4b3
r1bq1rk1/pp2ppbp/2np1np1/8/4P3/1NN1B3/PPP1BPPP/R2Q1RK1 b - -

B74 Sicilian Defense: Dragon Variation, Classical Variation, Spielmann Variation
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
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 b1c3 f8g7 c1e3 g8f6 f1e2 e8g8 d4b3 d7d6 e1g1 c8e6 f2f4 c6a5 f4f5 e6c4 e2d3
r2q1rk1/pp2ppbp/3p1np1/n4P2/2b1P3/1NNBB3/PPP3PP/R2Q1RK1 b - -

B74 Sicilian Defense: Dragon Variation, Classical Variation, Stockholm Attack
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
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
r4rk1/pp2ppbp/3p1np1/q4P2/4P1P1/2N1B3/PPP1Q2P/R4RK1 b - -

B74 Sicilian Defense: Dragon Variation, Classical Variation, Tartakower Line
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
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 f1e2 f8g7 e1g1 e8g8 c1e3 b8c6 d4b3 c8e6 f2f4 d8c8
r1q2rk1/pp2ppbp/2npbnp1/8/4PP2/1NN1B3/PPP1B1PP/R2Q1RK1 w - -

B75 Sicilian Defense: Dragon Variation, Yugoslav Attack, Belezky Line
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 Nc6
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 b8c6
r1bqk2r/pp2ppbp/2np1np1/8/3NP3/2N1BP2/PPP3PP/R2QKB1R w KQkq -

B75 Sicilian Defense: Dragon Variation, Yugoslav Attack, Early Deviations
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3
rnbqk2r/pp2ppbp/3p1np1/8/3NP3/2N1BP2/PPP3PP/R2QKB1R b KQkq -

B76 Sicilian Defense: Dragon Variation, Yugoslav Attack
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 e8g8
rnbq1rk1/pp2ppbp/3p1np1/8/3NP3/2N1BP2/PPP3PP/R2QKB1R w KQ -

B76 Sicilian Defense: Dragon Variation, Yugoslav Attack
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
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 e8g8 d1d2 b8c6
r1bq1rk1/pp2ppbp/2np1np1/8/3NP3/2N1BP2/PPPQ2PP/R3KB1R w KQ -

B76 Sicilian Defense: Dragon Variation, Yugoslav Attack, Modern Line
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
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 b8c6 d1d2 e8g8 e1c1
r1bq1rk1/pp2ppbp/2np1np1/8/3NP3/2N1BP2/PPPQ2PP/2KR1B1R b - -

B76 Sicilian Defense: Dragon Variation, Yugoslav Attack, Panov Variation
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
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 e8g8 d1d2 b8c6 g2g4
r1bq1rk1/pp2ppbp/2np1np1/8/3NP1P1/2N1BP2/PPPQ3P/R3KB1R b KQ -

B77 Sicilian Defense: Dragon Variation, Yugoslav Attack
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
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 e8g8 d1d2 b8c6 f1c4 c8d7
r2q1rk1/pp1bppbp/2np1np1/8/2BNP3/2N1BP2/PPPQ2PP/R3K2R w KQ -

B77 Sicilian Defense: Dragon Variation, Yugoslav Attack, Byrne Variation
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
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 e8g8 d1d2 b8c6 f1c4 a7a5
r1bq1rk1/1p2ppbp/2np1np1/p7/2BNP3/2N1BP2/PPPQ2PP/R3K2R w KQ -

B77 Sicilian Defense: Dragon Variation, Yugoslav Attack, Czerniak Variation
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
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 b8c6 d1d2 e8g8 f1c4 c6d4 e3d4 c8e6
r2q1rk1/pp2ppbp/3pbnp1/8/2BBP3/2N2P2/PPPQ2PP/R3K2R w KQ -

B77 Sicilian Defense: Dragon Variation, Yugoslav Attack, Main Line
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
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 e8g8 d1d2 b8c6 f1c4
r1bq1rk1/pp2ppbp/2np1np1/8/2BNP3/2N1BP2/PPPQ2PP/R3K2R b KQ -

B77 Sicilian Defense: Dragon Variation, Yugoslav Attack, Sosonko Variation
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
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 b8c6 d1d2 e8g8 f1c4 f6d7
r1bq1rk1/pp1nppbp/2np2p1/8/2BNP3/2N1BP2/PPPQ2PP/R3K2R w KQ -

B78 Sicilian Defense: Dragon Variation, Yugoslav Attack
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
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 e8g8 d1d2 b8c6 f1c4 c8d7 e1c1
r2q1rk1/pp1bppbp/2np1np1/8/2BNP3/2N1BP2/PPPQ2PP/2KR3R b - -

B78 Sicilian Defense: Dragon Variation, Yugoslav Attack, Old Line
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
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 e8g8 d1d2 b8c6 f1c4 c8d7 e1c1 a8c8
2rq1rk1/pp1bppbp/2np1np1/8/2BNP3/2N1BP2/PPPQ2PP/2KR3R w - -

B79 Sicilian Defense: Dragon Variation, Yugoslav Attack
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
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 e8g8 d1d2 b8c6 f1c4 c8d7 h2h4 d8a5 e1c1 f8c8 c4b3
r1r3k1/pp1bppbp/2np1np1/q7/3NP2P/1BN1BP2/PPPQ2P1/2KR3R b - -

B79 Sicilian Defense: Dragon Variation, Yugoslav Attack, Soltis Variation
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
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 e8g8 d1d2 b8c6 f1c4 c8d7 e1c1 d8a5 h2h4 f8c8 c4b3 h7h5
r1r3k1/pp1bppb1/2np1np1/q6p/3NP2P/1BN1BP2/PPPQ2P1/2KR3R w - -

B80 Sicilian Defense: Scheveningen Variation
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6
rnbqkb1r/pp3ppp/3ppn2/8/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq -

B80 Sicilian Defense: Scheveningen Variation, English Attack, with Qd2
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e6 7. Qd2
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1e3 e7e6 d1d2
rnbqkb1r/1p3ppp/p2ppn2/8/3NP3/2N1B3/PPPQ1PPP/R3KB1R b KQkq -

B80 Sicilian Defense: Scheveningen Variation, Fianchetto Variation
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. g3
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 g2g3
rnbqkb1r/pp3ppp/3ppn2/8/3NP3/2N3P1/PPP2P1P/R1BQKB1R b KQkq -

B80 Sicilian Defense: Scheveningen Variation, Vitolins Variation
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bb5+
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1b5
rnbqkb1r/pp3ppp/3ppn2/1B6/3NP3/2N5/PPP2PPP/R1BQK2R b KQkq -

B81 Sicilian Defense: Scheveningen Variation, Keres Attack
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. g4
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 g2g4
rnbqkb1r/pp3ppp/3ppn2/8/3NP1P1/2N5/PPP2P1P/R1BQKB1R b KQkq -

B82 Sicilian Defense: Scheveningen Variation, Matanovic Attack
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. f4
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f2f4
rnbqkb1r/pp3ppp/3ppn2/8/3NPP2/2N5/PPP3PP/R1BQKB1R b KQkq -

B82 Sicilian Defense: Scheveningen Variation, Tal Variation
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. f4 Nc6 7. Be3 Be7 8. Qf3
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f2f4 b8c6 c1e3 f8e7 d1f3
r1bqk2r/pp2bppp/2nppn2/8/3NPP2/2N1BQ2/PPP3PP/R3KB1R b KQkq -

B83 Sicilian Defense: Scheveningen Variation, Classical Variation
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1e2
rnbqkb1r/pp3ppp/3ppn2/8/3NP3/2N5/PPP1BPPP/R1BQK2R b KQkq -

B83 Sicilian Defense: Scheveningen Variation, Modern Variation
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 d6 6. Be2 Nf6
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 b1c3 d7d6 f1e2 g8f6
r1bqkb1r/pp3ppp/2nppn2/8/3NP3/2N5/PPP1BPPP/R1BQK2R w KQkq -

B83 Sicilian Defense: Scheveningen Variation, Modern Variation
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
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1e2 f8e7 e1g1 e8g8 f2f4 b8c6 c1e3
r1bq1rk1/pp2bppp/2nppn2/8/3NPP2/2N1B3/PPP1B1PP/R2Q1RK1 b - -

B83 Sicilian Defense: Scheveningen Variation, Modern Variation
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
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1e2 f8e7 e1g1 e8g8 f2f4 b8c6 c1e3 c8d7 d4b3
r2q1rk1/pp1bbppp/2nppn2/8/4PP2/1NN1B3/PPP1B1PP/R2Q1RK1 b - -

B84 Sicilian Defense: Najdorf Variation, Scheveningen Variation
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e6 7. O-O Nbd7
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 f1e2 e7e6 e1g1 b8d7
r1bqkb1r/1p1n1ppp/p2ppn2/8/3NP3/2N5/PPP1BPPP/R1BQ1RK1 w kq -

B84 Sicilian Defense: Scheveningen Variation, Classical Variation
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e6
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 f1e2 e7e6
rnbqkb1r/1p3ppp/p2ppn2/8/3NP3/2N5/PPP1BPPP/R1BQK2R w KQkq -

B84 Sicilian Defense: Scheveningen Variation, Classical Variation
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e6 7. O-O Qc7
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 f1e2 e7e6 e1g1 d8c7
rnb1kb1r/1pq2ppp/p2ppn2/8/3NP3/2N5/PPP1BPPP/R1BQ1RK1 w kq -

B85 Sicilian Defense: Scheveningen Variation, Classical Main Line
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
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 b1c3 d8c7 f1e2 a7a6 e1g1 g8f6 c1e3 f8e7 f2f4 d7d6 d1e1 e8g8
r1b2rk1/1pq1bppp/p1nppn2/8/3NPP2/2N1B3/PPP1B1PP/R3QRK1 w - -

B85 Sicilian Defense: Scheveningen Variation, Classical Variation, Paulsen Variation
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
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 f2f4 e7e6 f1e2 d8c7 e1g1 b8c6
r1b1kb1r/1pq2ppp/p1nppn2/8/3NPP2/2N5/PPP1B1PP/R1BQ1RK1 w kq -

B85 Sicilian Defense: Scheveningen Variation, Classical Variation, Paulsen Variation
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
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 b1c3 d8c7 f1e2 a7a6 e1g1 g8f6 c1e3 d7d6 f2f4
r1b1kb1r/1pq2ppp/p1nppn2/8/3NPP2/2N1B3/PPP1B1PP/R2Q1RK1 b kq -

B85 Sicilian Defense: Scheveningen Variation, Classical Variation, Paulsen Variation
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
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 b1c3 d8c7 f1e2 a7a6 e1g1 g8f6 g1h1 f8e7 f2f4 d7d6 a2a4
r1b1k2r/1pq1bppp/p1nppn2/8/P2NPP2/2N5/1PP1B1PP/R1BQ1R1K b kq -

B86 Sicilian Defense: Sozin Attack
1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bc4
e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1c4
rnbqkb1r/pp3ppp/3ppn2/8/2BNP3/2N5/PPP2PPP/R1BQK2R b KQkq -

B87 Sicilian Defense: Sozin Attack, Flank Variation
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bc4 e6 7. Bb3 b5
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 f1c4 e7e6 c4b3 b7b5
rnbqkb1r/5ppp/p2ppn2/1p6/3NP3/1BN5/PPP2PPP/R1BQK2R w KQkq -

B88 Sicilian Defense: Sozin Attack, Fischer Variation
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
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1c4 e7e6 c4b3 f8e7 c1e3 e8g8 f2f4
r1bq1rk1/pp2bppp/2nppn2/8/3NPP2/1BN1B3/PPP3PP/R2QK2R b KQ -

B88 Sicilian Defense: Sozin Attack, Leonhardt Variation
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bc4 e6
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1c4 e7e6
r1bqkb1r/pp3ppp/2nppn2/8/2BNP3/2N5/PPP2PPP/R1BQK2R w KQkq -

B89 Sicilian Defense: Sozin Attack, Main Line
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bc4 e6 7. Be3
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1c4 e7e6 c1e3
r1bqkb1r/pp3ppp/2nppn2/8/2BNP3/2N1B3/PPP2PPP/R2QK2R b KQkq -

B89 Sicilian Defense: Sozin Attack, Main Line, Sherbakov Variation
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
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 f1c4 e7e6 c1e3 f8e7 c4b3 e8g8 e1g1 c6a5 f2f4 b7b6
r1bq1rk1/p3bppp/1p1ppn2/n7/3NPP2/1BN1B3/PPP3PP/R2Q1RK1 w - -

B89 Sicilian Defense: Velimirovic Attack
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bc4 e6 7. Be3 Be7 8. Qe2
e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1c4 e7e6 c1e3 f8e7 d1e2
r1bqk2r/pp2bppp/2nppn2/8/2BNP3/2N1B3/PPP1QPPP/R3K2R b KQkq -

B90 Sicilian Defense: Najdorf Variation
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6
rnbqkb1r/1p2pppp/p2p1n2/8/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq -

B90 Sicilian Defense: Najdorf Variation, Adams Attack
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. h3
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 h2h3
rnbqkb1r/1p2pppp/p2p1n2/8/3NP3/2N4P/PPP2PP1/R1BQKB1R b KQkq -

B90 Sicilian Defense: Najdorf Variation, Dekker Gambit
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g4
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 g2g4
rnbqkb1r/1p2pppp/p2p1n2/8/3NP1P1/2N5/PPP2P1P/R1BQKB1R b KQkq -

B90 Sicilian Defense: Najdorf Variation, English Attack
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1e3
rnbqkb1r/1p2pppp/p2p1n2/8/3NP3/2N1B3/PPP2PPP/R2QKB1R b KQkq -

B90 Sicilian Defense: Najdorf Variation, English Attack, Anti-English
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 Ng4
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1e3 f6g4
rnbqkb1r/1p2pppp/p2p4/8/3NP1n1/2N1B3/PPP2PPP/R2QKB1R w KQkq -

B90 Sicilian Defense: Najdorf Variation, Freak Attack
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Rg1
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 h1g1
rnbqkb1r/1p2pppp/p2p1n2/8/3NP3/2N5/PPP2PPP/R1BQKBR1 b Qkq -

B90 Sicilian Defense: Najdorf Variation, Lipnitsky Attack
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bc4
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 f1c4
rnbqkb1r/1p2pppp/p2p1n2/8/2BNP3/2N5/PPP2PPP/R1BQK2R b KQkq -

B90 Sicilian Defense: Scheveningen Variation, Delayed Keres Attack
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e6 7. g4
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1e3 e7e6 g2g4
rnbqkb1r/1p3ppp/p2ppn2/8/3NP1P1/2N1B3/PPP2P1P/R2QKB1R b KQkq -

B90 Sicilian Defense: Scheveningen Variation, Delayed Keres Attack, Perenyi Gambit
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
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1e3 e7e6 g2g4 e6e5 d4f5 g7g6 g4g5
rnbqkb1r/1p3p1p/p2p1np1/4pNP1/4P3/2N1B3/PPP2P1P/R2QKB1R b KQkq -

B90 Sicilian Defense: Scheveningen Variation, English Attack, with f3
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e6 7. f3
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1e3 e7e6 f2f3
rnbqkb1r/1p3ppp/p2ppn2/8/3NP3/2N1BP2/PPP3PP/R2QKB1R b KQkq -

B91 Sicilian Defense: Najdorf Variation, Zagreb Variation
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 g2g3
rnbqkb1r/1p2pppp/p2p1n2/8/3NP3/2N3P1/PPP2P1P/R1BQKB1R b KQkq -

B92 Sicilian Defense: Najdorf Variation, Opocensky Variation
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 f1e2
rnbqkb1r/1p2pppp/p2p1n2/8/3NP3/2N5/PPP1BPPP/R1BQK2R b KQkq -

B92 Sicilian Defense: Najdorf Variation, Opocensky Variation
1. e4 c5 2. Nf3 Nf6 3. Nc3 d6 4. d4 cxd4 5. Nxd4 a6 6. Be2 e5 7. Nb3 Be6 8. Be3
e2e4 c7c5 g1f3 g8f6 b1c3 d7d6 d2d4 c5d4 f3d4 a7a6 f1e2 e7e5 d4b3 c8e6 c1e3
rn1qkb1r/1p3ppp/p2pbn2/4p3/4P3/1NN1B3/PPP1BPPP/R2QK2R b KQkq -

B92 Sicilian Defense: Najdorf Variation, Opocensky Variation, Modern Line
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
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 f1e2 e7e5 d4b3 f8e7 e1g1 c8e6
rn1qk2r/1p2bppp/p2pbn2/4p3/4P3/1NN5/PPP1BPPP/R1BQ1RK1 w kq -

B92 Sicilian Defense: Najdorf Variation, Opocensky Variation, Traditional Line
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
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 f1e2 e7e5 d4b3 f8e7 e1g1 e8g8
rnbq1rk1/1p2bppp/p2p1n2/4p3/4P3/1NN5/PPP1BPPP/R1BQ1RK1 w - -

B93 Sicilian Defense: Najdorf Variation, Amsterdam Variation
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f4
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 f2f4
rnbqkb1r/1p2pppp/p2p1n2/8/3NPP2/2N5/PPP3PP/R1BQKB1R b KQkq -

B94 Sicilian Defense: Najdorf Variation
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5
rnbqkb1r/1p2pppp/p2p1n2/6B1/3NP3/2N5/PPP2PPP/R2QKB1R b KQkq -

B94 Sicilian Defense: Najdorf Variation, Ivkov Variation
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
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5 b8d7 f1c4 d8a5 d1d2 e7e6 e1c1 b7b5 c4b3 c8b7 h1e1 d7c5 e4e5
r3kb1r/1b3ppp/p2ppn2/qpn1P1B1/3N4/1BN5/PPPQ1PPP/2KRR3 b kq -

B95 Sicilian Defense: Najdorf Variation
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5 e7e6
rnbqkb1r/1p3ppp/p2ppn2/6B1/3NP3/2N5/PPP2PPP/R2QKB1R w KQkq -

B96 Sicilian Defense: Najdorf Variation
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5 e7e6 f2f4
rnbqkb1r/1p3ppp/p2ppn2/6B1/3NPP2/2N5/PPP3PP/R2QKB1R b KQkq -

B96 Sicilian Defense: Najdorf Variation, Neo-Classical Defense
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Nc6
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5 e7e6 f2f4 b8c6
r1bqkb1r/1p3ppp/p1nppn2/6B1/3NPP2/2N5/PPP3PP/R2QKB1R w KQkq -

B96 Sicilian Defense: Najdorf Variation, Polugaevsky Variation
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 b5
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5 e7e6 f2f4 b7b5
rnbqkb1r/5ppp/p2ppn2/1p4B1/3NPP2/2N5/PPP3PP/R2QKB1R w KQkq -

B96 Sicilian Defense: Najdorf Variation, Polugaevsky Variation, Simagin Line
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
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5 e7e6 f2f4 b7b5 e4e5 d6e5 f4e5 d8c7 d1e2
rnb1kb1r/2q2ppp/p3pn2/1p2P1B1/3N4/2N5/PPP1Q1PP/R3KB1R b KQkq -

B97 Sicilian Defense: Najdorf Variation, Poisoned Pawn Accepted
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
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5 e7e6 f2f4 d8b6 d1d2 b6b2 a1b1 b2a3
rnb1kb1r/1p3ppp/p2ppn2/6B1/3NPP2/q1N5/P1PQ2PP/1R2KB1R w Kkq -

B97 Sicilian Defense: Najdorf Variation, Poisoned Pawn Variation
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Qb6
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5 e7e6 f2f4 d8b6
rnb1kb1r/1p3ppp/pq1ppn2/6B1/3NPP2/2N5/PPP3PP/R2QKB1R w KQkq -

B98 Sicilian Defense: Najdorf Variation
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5 e7e6 f2f4 f8e7
rnbqk2r/1p2bppp/p2ppn2/6B1/3NPP2/2N5/PPP3PP/R2QKB1R w KQkq -

B98 Sicilian Defense: Najdorf Variation, Browne Variation
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
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5 e7e6 f2f4 f8e7 d1f3 h7h6 g5h4 d8c7
rnb1k2r/1pq1bpp1/p2ppn1p/8/3NPP1B/2N2Q2/PPP3PP/R3KB1R w KQkq -

B98 Sicilian Defense: Najdorf Variation, Goteborg Variation
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
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5 e7e6 f2f4 f8e7 d1f3 h7h6 g5h4 g7g5
rnbqk2r/1p2bp2/p2ppn1p/6p1/3NPP1B/2N2Q2/PPP3PP/R3KB1R w KQkq -

B98 Sicilian Defense: Najdorf Variation, Traditional Line
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Qf3 Qc7
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5 e7e6 f2f4 f8e7 d1f3 d8c7
rnb1k2r/1pq1bppp/p2ppn2/6B1/3NPP2/2N2Q2/PPP3PP/R3KB1R w KQkq -

B99 Sicilian Defense: Najdorf Variation, Main Line
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
e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5 e7e6 f2f4 f8e7 d1f3 d8c7 e1c1 b8d7
r1b1k2r/1pqnbppp/p2ppn2/6B1/3NPP2/2N2Q2/PPP3PP/2KR1B1R w kq -

C00 French Defense
1. e4 e6
e2e4 e7e6
rnbqkbnr/pppp1ppp/4p3/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -

C00 French Defense
1. e4 e6 2. d4 d5
e2e4 e7e6 d2d4 d7d5
rnbqkbnr/ppp2ppp/4p3/3p4/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -

C00 French Defense: Alapin Gambit
1. e4 e6 2. d4 d5 3. Be3
e2e4 e7e6 d2d4 d7d5 c1e3
rnbqkbnr/ppp2ppp/4p3/3p4/3PP3/4B3/PPP2PPP/RN1QKBNR b KQkq -

C00 French Defense: Baeuerle Gambit
1. e4 e6 2. d4 b5
e2e4 e7e6 d2d4 b7b5
rnbqkbnr/p1pp1ppp/4p3/1p6/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -

C00 French Defense: Banzai-Leong Gambit
1. e4 e6 2. b4
e2e4 e7e6 b2b4
rnbqkbnr/pppp1ppp/4p3/8/1P2P3/8/P1PP1PPP/RNBQKBNR b KQkq -

C00 French Defense: Banzai-Leong Gambit, Pinova Gambit
1. e4 e6 2. b4 Bxb4 3. e5
e2e4 e7e6 b2b4 f8b4 e4e5
rnbqk1nr/pppp1ppp/4p3/4P3/1b6/8/P1PP1PPP/RNBQKBNR b KQkq -

C00 French Defense: Bird Invitation
1. e4 e6 2. Bb5
e2e4 e7e6 f1b5
rnbqkbnr/pppp1ppp/4p3/1B6/4P3/8/PPPP1PPP/RNBQK1NR b KQkq -

C00 French Defense: Carlson Gambit
1. e4 e6 2. d4 d5 3. Nf3 dxe4 4. Ne5
e2e4 e7e6 d2d4 d7d5 g1f3 d5e4 f3e5
rnbqkbnr/ppp2ppp/4p3/4N3/3Pp3/8/PPP2PPP/RNBQKB1R b KQkq -

C00 French Defense: Chigorin Variation
1. e4 e6 2. Qe2
e2e4 e7e6 d1e2
rnbqkbnr/pppp1ppp/4p3/8/4P3/8/PPPPQPPP/RNB1KBNR b KQkq -

C00 French Defense: Diemer-Duhm Gambit
1. e4 e6 2. d4 d5 3. c4
e2e4 e7e6 d2d4 d7d5 c2c4
rnbqkbnr/ppp2ppp/4p3/3p4/2PPP3/8/PP3PPP/RNBQKBNR b KQkq -

C00 French Defense: Diemer-Duhm Gambit Accepted
1. e4 e6 2. d4 d5 3. c4 dxe4
e2e4 e7e6 d2d4 d7d5 c2c4 d5e4
rnbqkbnr/ppp2ppp/4p3/8/2PPp3/8/PP3PPP/RNBQKBNR w KQkq -

C00 French Defense: Franco-Hiva Gambit
1. e4 e6 2. d4 f5
e2e4 e7e6 d2d4 f7f5
rnbqkbnr/pppp2pp/4p3/5p2/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -

C00 French Defense: Franco-Hiva Gambit Accepted
1. e4 e6 2. d4 f5 3. exf5
e2e4 e7e6 d2d4 f7f5 e4f5
rnbqkbnr/pppp2pp/4p3/5P2/3P4/8/PPP2PPP/RNBQKBNR b KQkq -

C00 French Defense: Franco-Sicilian Defense
1. e4 e6 2. d4 c5
e2e4 e7e6 d2d4 c7c5
rnbqkbnr/pp1p1ppp/4p3/2p5/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -

C00 French Defense: Hoffmann Gambit
1. e4 e6 2. d4 d5 3. Qe2 e5 4. f4 exf4
e2e4 e7e6 d2d4 d7d5 d1e2 e6e5 f2f4 e5f4
rnbqkbnr/ppp2ppp/8/3p4/3PPp2/8/PPP1Q1PP/RNB1KBNR w KQkq -

C00 French Defense: Horwitz Attack
1. e4 e6 2. b3
e2e4 e7e6 b2b3
rnbqkbnr/pppp1ppp/4p3/8/4P3/1P6/P1PP1PPP/RNBQKBNR b KQkq -

C00 French Defense: Horwitz Attack, Papa-Ticulat Gambit
1. e4 e6 2. b3 d5 3. Bb2
e2e4 e7e6 b2b3 d7d5 c1b2
rnbqkbnr/ppp2ppp/4p3/3p4/4P3/1P6/PBPP1PPP/RN1QKBNR b KQkq -

C00 French Defense: King's Indian Attack
1. e4 e6 2. d3
e2e4 e7e6 d2d3
rnbqkbnr/pppp1ppp/4p3/8/4P3/3P4/PPP2PPP/RNBQKBNR b KQkq -

C00 French Defense: King's Indian Attack, Franco-Hiva Gambit
1. e4 e6 2. d3 f5
e2e4 e7e6 d2d3 f7f5
rnbqkbnr/pppp2pp/4p3/5p2/4P3/3P4/PPP2PPP/RNBQKBNR w KQkq -

C00 French Defense: Knight Variation
1. e4 e6 2. Nf3
e2e4 e7e6 g1f3
rnbqkbnr/pppp1ppp/4p3/8/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq -

C00 French Defense: Knight Variation, Franco-Hiva Gambit
1. e4 e6 2. Nf3 f5
e2e4 e7e6 g1f3 f7f5
rnbqkbnr/pppp2pp/4p3/5p2/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -

C00 French Defense: La Bourdonnais Variation
1. e4 e6 2. f4
e2e4 e7e6 f2f4
rnbqkbnr/pppp1ppp/4p3/8/4PP2/8/PPPP2PP/RNBQKBNR b KQkq -

C00 French Defense: La Bourdonnais Variation, Reuter Gambit
1. e4 e6 2. f4 d5 3. Nf3 dxe4
e2e4 e7e6 f2f4 d7d5 g1f3 d5e4
rnbqkbnr/ppp2ppp/4p3/8/4pP2/5N2/PPPP2PP/RNBQKB1R w KQkq -

C00 French Defense: Mediterranean Defense
1. e4 e6 2. d4 Nf6
e2e4 e7e6 d2d4 g8f6
rnbqkb1r/pppp1ppp/4pn2/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -

C00 French Defense: Morphy Gambit
1. e4 e6 2. d4 d5 3. Nh3
e2e4 e7e6 d2d4 d7d5 g1h3
rnbqkbnr/ppp2ppp/4p3/3p4/3PP3/7N/PPP2PPP/RNBQKB1R b KQkq -

C00 French Defense: Normal Variation
1. e4 e6 2. d4
e2e4 e7e6 d2d4
rnbqkbnr/pppp1ppp/4p3/8/3PP3/8/PPP2PPP/RNBQKBNR b KQkq -

C00 French Defense: Orthoschnapp Gambit
1. e4 e6 2. c4 d5 3. cxd5 exd5 4. Qb3
e2e4 e7e6 c2c4 d7d5 c4d5 e6d5 d1b3
rnbqkbnr/ppp2ppp/8/3p4/4P3/1Q6/PP1P1PPP/RNB1KBNR b KQkq -

C00 French Defense: Pelikan Variation
1. e4 e6 2. Nc3 d5 3. f4
e2e4 e7e6 b1c3 d7d5 f2f4
rnbqkbnr/ppp2ppp/4p3/3p4/4PP2/2N5/PPPP2PP/R1BQKBNR b KQkq -

C00 French Defense: Perseus Gambit
1. e4 e6 2. d4 d5 3. Nf3
e2e4 e7e6 d2d4 d7d5 g1f3
rnbqkbnr/ppp2ppp/4p3/3p4/3PP3/5N2/PPP2PPP/RNBQKB1R b KQkq -

C00 French Defense: Queen's Knight
1. e4 e6 2. Nc3
e2e4 e7e6 b1c3
rnbqkbnr/pppp1ppp/4p3/8/4P3/2N5/PPPP1PPP/R1BQKBNR b KQkq -

C00 French Defense: Reversed Philidor Formation
1. e4 e6 2. d3 d5 3. Nd2 Nf6 4. Ngf3 Nc6 5. Be2
e2e4 e7e6 d2d3 d7d5 b1d2 g8f6 g1f3 b8c6 f1e2
r1bqkb1r/ppp2ppp/2n1pn2/3p4/4P3/3P1N2/PPPNBPPP/R1BQK2R b KQkq -

C00 French Defense: Réti-Spielmann Attack
1. e4 e6 2. g3
e2e4 e7e6 g2g3
rnbqkbnr/pppp1ppp/4p3/8/4P3/6P1/PPPP1P1P/RNBQKBNR b KQkq -

C00 French Defense: Schlechter Variation
1. e4 e6 2. d4 d5 3. Bd3
e2e4 e7e6 d2d4 d7d5 f1d3
rnbqkbnr/ppp2ppp/4p3/3p4/3PP3/3B4/PPP2PPP/RNBQK1NR b KQkq -

C00 French Defense: St. George Defense
1. e4 e6 2. d4 a6
e2e4 e7e6 d2d4 a7a6
rnbqkbnr/1ppp1ppp/p3p3/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -

C00 French Defense: St. George Defense, Sanky-George Gambit
1. e4 e6 2. d4 a6 3. c4 b5
e2e4 e7e6 d2d4 a7a6 c2c4 b7b5
rnbqkbnr/2pp1ppp/p3p3/1p6/2PPP3/8/PP3PPP/RNBQKBNR w KQkq -

C00 French Defense: St. George Defense, St. George Gambit
1. e4 e6 2. d4 a6 3. c4 b5 4. cxb5 axb5
e2e4 e7e6 d2d4 a7a6 c2c4 b7b5 c4b5 a6b5
rnbqkbnr/2pp1ppp/4p3/1p6/3PP3/8/PP3PPP/RNBQKBNR w KQkq -

C00 French Defense: St. George Defense, Three Pawn Attack
1. e4 e6 2. d4 a6 3. c4
e2e4 e7e6 d2d4 a7a6 c2c4
rnbqkbnr/1ppp1ppp/p3p3/8/2PPP3/8/PP3PPP/RNBQKBNR b KQkq -

C00 French Defense: St. George Defense, Traditional Line
1. e4 e6 2. d4 a6 3. Nf3 b5 4. Bd3 c5 5. c3 Bb7 6. O-O Nf6
e2e4 e7e6 d2d4 a7a6 g1f3 b7b5 f1d3 c7c5 c2c3 c8b7 e1g1 g8f6
rn1qkb1r/1b1p1ppp/p3pn2/1pp5/3PP3/2PB1N2/PP3PPP/RNBQ1RK1 w kq -

C00 French Defense: Steiner Variation
1. e4 e6 2. c4
e2e4 e7e6 c2c4
rnbqkbnr/pppp1ppp/4p3/8/2P1P3/8/PP1P1PPP/RNBQKBNR b KQkq -

C00 French Defense: Steinitz Attack
1. e4 e6 2. e5
e2e4 e7e6 e4e5
rnbqkbnr/pppp1ppp/4p3/4P3/8/8/PPPP1PPP/RNBQKBNR b KQkq -

C00 French Defense: Two Knights Variation
1. e4 e6 2. Nf3 d5 3. Nc3
e2e4 e7e6 g1f3 d7d5 b1c3
rnbqkbnr/ppp2ppp/4p3/3p4/4P3/2N2N2/PPPP1PPP/R1BQKB1R b KQkq -

C00 French Defense: Wing Gambit
1. e4 e6 2. Nf3 d5 3. e5 c5 4. b4
e2e4 e7e6 g1f3 d7d5 e4e5 c7c5 b2b4
rnbqkbnr/pp3ppp/4p3/2ppP3/1P6/5N2/P1PP1PPP/RNBQKB1R b KQkq -

C00 Rat Defense: Small Center Defense
1. d4 e6 2. e4 d6
d2d4 e7e6 e2e4 d7d6
rnbqkbnr/ppp2ppp/3pp3/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -

C01 French Defense: Exchange Variation
1. e4 e6 2. d4 d5 3. exd5
e2e4 e7e6 d2d4 d7d5 e4d5
rnbqkbnr/ppp2ppp/4p3/3P4/3P4/8/PPP2PPP/RNBQKBNR b KQkq -

C01 French Defense: Exchange Variation, Bogoljubow Variation
1. e4 e6 2. d4 d5 3. exd5 exd5 4. Nc3 Nf6 5. Bg5 Nc6
e2e4 e7e6 d2d4 d7d5 e4d5 e6d5 b1c3 g8f6 c1g5 b8c6
r1bqkb1r/ppp2ppp/2n2n2/3p2B1/3P4/2N5/PPP2PPP/R2QKBNR w KQkq -

C01 French Defense: Exchange Variation, Monte Carlo Variation
1. e4 e6 2. d4 d5 3. exd5 exd5 4. c4
e2e4 e7e6 d2d4 d7d5 e4d5 e6d5 c2c4
rnbqkbnr/ppp2ppp/8/3p4/2PP4/8/PP3PPP/RNBQKBNR b KQkq -

C01 French Defense: Exchange Variation, Svenonius Variation
1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. exd5 exd5 5. Bg5
e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 e4d5 e6d5 c1g5
rnbqkb1r/ppp2ppp/5n2/3p2B1/3P4/2N5/PPP2PPP/R2QKBNR b KQkq -

C02 French Defense: Advance Variation
1. e4 e6 2. d4 d5 3. e5
e2e4 e7e6 d2d4 d7d5 e4e5
rnbqkbnr/ppp2ppp/4p3/3pP3/3P4/8/PPP2PPP/RNBQKBNR b KQkq -

C02 French Defense: Advance Variation
1. e4 e6 2. d4 d5 3. e5 c5
e2e4 e7e6 d2d4 d7d5 e4e5 c7c5
rnbqkbnr/pp3ppp/4p3/2ppP3/3P4/8/PPP2PPP/RNBQKBNR w KQkq -

C02 French Defense: Advance Variation
1. e4 e6 2. d4 d5 3. e5 c5 4. c3
e2e4 e7e6 d2d4 d7d5 e4e5 c7c5 c2c3
rnbqkbnr/pp3ppp/4p3/2ppP3/3P4/2P5/PP3PPP/RNBQKBNR b KQkq -

C02 French Defense: Advance Variation
1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6
e2e4 e7e6 d2d4 d7d5 e4e5 c7c5 c2c3 b8c6
r1bqkbnr/pp3ppp/2n1p3/2ppP3/3P4/2P5/PP3PPP/RNBQKBNR w KQkq -

C02 French Defense: Advance Variation, Euwe Variation
1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Bd7
e2e4 e7e6 d2d4 d7d5 e4e5 c7c5 c2c3 b8c6 g1f3 c8d7
r2qkbnr/pp1b1ppp/2n1p3/2ppP3/3P4/2P2N2/PP3PPP/RNBQKB1R w KQkq -

C02 French Defense: Advance Variation, Extended Bishop Swap
1. e4 e6 2. d4 d5 3. e5 Bd7
e2e4 e7e6 d2d4 d7d5 e4e5 c8d7
rn1qkbnr/pppb1ppp/4p3/3pP3/3P4/8/PPP2PPP/RNBQKBNR w KQkq -

C02 French Defense: Advance Variation, Frenkel Gambit
1. e4 e6 2. d4 d5 3. e5 c5 4. b4
e2e4 e7e6 d2d4 d7d5 e4e5 c7c5 b2b4
rnbqkbnr/pp3ppp/4p3/2ppP3/1P1P4/8/P1P2PPP/RNBQKBNR b KQkq -

C02 French Defense: Advance Variation, Lputian Variation
1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. a3 Nh6
e2e4 e7e6 d2d4 d7d5 e4e5 c7c5 c2c3 b8c6 g1f3 d8b6 a2a3 g8h6
r1b1kb1r/pp3ppp/1qn1p2n/2ppP3/3P4/P1P2N2/1P3PPP/RNBQKB1R w KQkq -

C02 French Defense: Advance Variation, Main Line
1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. a3
e2e4 e7e6 d2d4 d7d5 e4e5 c7c5 c2c3 b8c6 g1f3 d8b6 a2a3
r1b1kbnr/pp3ppp/1qn1p3/2ppP3/3P4/P1P2N2/1P3PPP/RNBQKB1R b KQkq -

C02 French Defense: Advance Variation, Milner-Barry Gambit
1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. Bd3
e2e4 e7e6 d2d4 d7d5 e4e5 c7c5 c2c3 b8c6 g1f3 d8b6 f1d3
r1b1kbnr/pp3ppp/1qn1p3/2ppP3/3P4/2PB1N2/PP3PPP/RNBQK2R b KQkq -

C02 French Defense: Advance Variation, Milner-Barry Gambit, Sørensen Variation
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
e2e4 e7e6 d2d4 d7d5 e4e5 c7c5 c2c3 b8c6 g1f3 d8b6 f1d3 c5d4 c3d4 c8d7 e1g1 c6d4 f3g5
r3kbnr/pp1b1ppp/1q2p3/3pP1N1/3n4/3B4/PP3PPP/RNBQ1RK1 b kq -

C02 French Defense: Advance Variation, Nimzowitsch Attack
1. e4 e6 2. d4 d5 3. e5 c5 4. Qg4
e2e4 e7e6 d2d4 d7d5 e4e5 c7c5 d1g4
rnbqkbnr/pp3ppp/4p3/2ppP3/3P2Q1/8/PPP2PPP/RNB1KBNR b KQkq -

C02 French Defense: Advance Variation, Nimzowitsch Gambit
1. e4 e6 2. d4 d5 3. e5 c5 4. Qg4 cxd4 5. Nf3
e2e4 e7e6 d2d4 d7d5 e4e5 c7c5 d1g4 c5d4 g1f3
rnbqkbnr/pp3ppp/4p3/3pP3/3p2Q1/5N2/PPP2PPP/RNB1KB1R b KQkq -

C02 French Defense: Advance Variation, Nimzowitsch System
1. e4 e6 2. d4 d5 3. e5 c5 4. Nf3
e2e4 e7e6 d2d4 d7d5 e4e5 c7c5 g1f3
rnbqkbnr/pp3ppp/4p3/2ppP3/3P4/5N2/PPP2PPP/RNBQKB1R b KQkq -

C02 French Defense: Advance Variation, Paulsen Attack
1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3
e2e4 e7e6 d2d4 d7d5 e4e5 c7c5 c2c3 b8c6 g1f3
r1bqkbnr/pp3ppp/2n1p3/2ppP3/3P4/2P2N2/PP3PPP/RNBQKB1R b KQkq -

C02 French Defense: Advance Variation, Ruisdonk Gambit
1. e4 e6 2. d4 d5 3. e5 c5 4. Nf3 cxd4 5. Bd3
e2e4 e7e6 d2d4 d7d5 e4e5 c7c5 g1f3 c5d4 f1d3
rnbqkbnr/pp3ppp/4p3/3pP3/3p4/3B1N2/PPP2PPP/RNBQK2R b KQkq -

C02 French Defense: Advance Variation, Steinitz Variation
1. e4 e6 2. d4 d5 3. e5 c5 4. dxc5
e2e4 e7e6 d2d4 d7d5 e4e5 c7c5 d4c5
rnbqkbnr/pp3ppp/4p3/2PpP3/8/8/PPP2PPP/RNBQKBNR b KQkq -

C02 French Defense: Advance Variation, Wade Variation
1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Qb6 5. Nf3 Bd7
e2e4 e7e6 d2d4 d7d5 e4e5 c7c5 c2c3 d8b6 g1f3 c8d7
rn2kbnr/pp1b1ppp/1q2p3/2ppP3/3P4/2P2N2/PP3PPP/RNBQKB1R w KQkq -

C03 French Defense: Guimard Variation, Thunderbunny Variation
1. e4 e6 2. d4 d5 3. Nd2 Nc6 4. c3 dxe4 5. Nxe4 e5
e2e4 e7e6 d2d4 d7d5 b1d2 b8c6 c2c3 d5e4 d2e4 e6e5
r1bqkbnr/ppp2ppp/2n5/4p3/3PN3/2P5/PP3PPP/R1BQKBNR w KQkq -

C03 French Defense: Tarrasch Variation
1. e4 e6 2. d4 d5 3. Nd2
e2e4 e7e6 d2d4 d7d5 b1d2
rnbqkbnr/ppp2ppp/4p3/3p4/3PP3/8/PPPN1PPP/R1BQKBNR b KQkq -

C03 French Defense: Tarrasch Variation, Guimard Defense
1. e4 e6 2. d4 d5 3. Nd2 Nc6
e2e4 e7e6 d2d4 d7d5 b1d2 b8c6
r1bqkbnr/ppp2ppp/2n1p3/3p4/3PP3/8/PPPN1PPP/R1BQKBNR w KQkq -

C03 French Defense: Tarrasch Variation, Haberditz Variation
1. e4 e6 2. d4 d5 3. Nd2 f5
e2e4 e7e6 d2d4 d7d5 b1d2 f7f5
rnbqkbnr/ppp3pp/4p3/3p1p2/3PP3/8/PPPN1PPP/R1BQKBNR w KQkq -

C03 French Defense: Tarrasch Variation, Modern System
1. e4 e6 2. d4 d5 3. Nd2 a6
e2e4 e7e6 d2d4 d7d5 b1d2 a7a6
rnbqkbnr/1pp2ppp/p3p3/3p4/3PP3/8/PPPN1PPP/R1BQKBNR w KQkq -

C03 French Defense: Tarrasch Variation, Morozevich Variation
1. e4 e6 2. d4 d5 3. Nd2 Be7
e2e4 e7e6 d2d4 d7d5 b1d2 f8e7
rnbqk1nr/ppp1bppp/4p3/3p4/3PP3/8/PPPN1PPP/R1BQKBNR w KQkq -

C04 French Defense: Tarrasch Variation, Guimard Defense, Main Line
1. e4 e6 2. d4 d5 3. Nd2 Nc6 4. Ngf3 Nf6
e2e4 e7e6 d2d4 d7d5 b1d2 b8c6 g1f3 g8f6
r1bqkb1r/ppp2ppp/2n1pn2/3p4/3PP3/5N2/PPPN1PPP/R1BQKB1R w KQkq -

C05 French Defense: Tarrasch Variation, Botvinnik Variation
1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 b6
e2e4 e7e6 d2d4 d7d5 b1d2 g8f6 e4e5 f6d7 f1d3 c7c5 c2c3 b7b6
rnbqkb1r/p2n1ppp/1p2p3/2ppP3/3P4/2PB4/PP1N1PPP/R1BQK1NR w KQkq -

C05 French Defense: Tarrasch Variation, Closed Variation
1. e4 e6 2. d4 d5 3. Nd2 Nf6
e2e4 e7e6 d2d4 d7d5 b1d2 g8f6
rnbqkb1r/ppp2ppp/4pn2/3p4/3PP3/8/PPPN1PPP/R1BQKBNR w KQkq -

C05 French Defense: Tarrasch Variation, Closed Variation
1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 Nc6
e2e4 e7e6 d2d4 d7d5 b1d2 g8f6 e4e5 f6d7 f1d3 c7c5 c2c3 b8c6
r1bqkb1r/pp1n1ppp/2n1p3/2ppP3/3P4/2PB4/PP1N1PPP/R1BQK1NR w KQkq -

C05 French Defense: Tarrasch Variation, Pawn Center Variation
1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. f4
e2e4 e7e6 d2d4 d7d5 b1d2 g8f6 e4e5 f6d7 f2f4
rnbqkb1r/pppn1ppp/4p3/3pP3/3P1P2/8/PPPN2PP/R1BQKBNR b KQkq -

C06 French Defense: Tarrasch Variation, Closed Variation, Main Line
1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 Nc6 7. Ne2 cxd4 8. cxd4
e2e4 e7e6 d2d4 d7d5 b1d2 g8f6 e4e5 f6d7 f1d3 c7c5 c2c3 b8c6 g1e2 c5d4 c3d4
r1bqkb1r/pp1n1ppp/2n1p3/3pP3/3P4/3B4/PP1NNPPP/R1BQK2R b KQkq -

C06 French Defense: Tarrasch Variation, Leningrad Variation
1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 Nc6 7. Ne2 cxd4 8. cxd4 Nb6
e2e4 e7e6 d2d4 d7d5 b1d2 g8f6 e4e5 f6d7 f1d3 c7c5 c2c3 b8c6 g1e2 c5d4 c3d4 d7b6
r1bqkb1r/pp3ppp/1nn1p3/3pP3/3P4/3B4/PP1NNPPP/R1BQK2R w KQkq -

C07 French Defense: Tarrasch Variation, Chistyakov Defense
1. e4 e6 2. d4 d5 3. Nd2 c5 4. exd5 Qxd5
e2e4 e7e6 d2d4 d7d5 b1d2 c7c5 e4d5 d8d5
rnb1kbnr/pp3ppp/4p3/2pq4/3P4/8/PPPN1PPP/R1BQKBNR w KQkq -

C07 French Defense: Tarrasch Variation, Chistyakov Defense, Modern Line
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
e2e4 e7e6 d2d4 d7d5 b1d2 c7c5 e4d5 d8d5 g1f3 c5d4 f1c4 d5d6 e1g1 g8f6 d2b3 b8c6 b3d4 c6d4 f3d4 a7a6
r1b1kb1r/1p3ppp/p2qpn2/8/2BN4/8/PPP2PPP/R1BQ1RK1 w kq -

C07 French Defense: Tarrasch Variation, Eliskases Variation
1. e4 e6 2. d4 d5 3. Nd2 c5 4. exd5 Qxd5 5. Ngf3 cxd4 6. Bc4 Qd8
e2e4 e7e6 d2d4 d7d5 b1d2 c7c5 e4d5 d8d5 g1f3 c5d4 f1c4 d5d8
rnbqkbnr/pp3ppp/4p3/8/2Bp4/5N2/PPPN1PPP/R1BQK2R w KQkq -

C07 French Defense: Tarrasch Variation, Open System
1. e4 e6 2. d4 d5 3. Nd2 c5
e2e4 e7e6 d2d4 d7d5 b1d2 c7c5
rnbqkbnr/pp3ppp/4p3/2pp4/3PP3/8/PPPN1PPP/R1BQKBNR w KQkq -

C07 French Defense: Tarrasch Variation, Open System, Euwe-Keres Line
1. e4 e6 2. d4 d5 3. Nd2 c5 4. Ngf3
e2e4 e7e6 d2d4 d7d5 b1d2 c7c5 g1f3
rnbqkbnr/pp3ppp/4p3/2pp4/3PP3/5N2/PPPN1PPP/R1BQKB1R b KQkq -

C07 French Defense: Tarrasch Variation, Open System, Shaposhnikov Gambit
1. e4 e6 2. d4 d5 3. Nd2 c5 4. exd5 Nf6
e2e4 e7e6 d2d4 d7d5 b1d2 c7c5 e4d5 g8f6
rnbqkb1r/pp3ppp/4pn2/2pP4/3P4/8/PPPN1PPP/R1BQKBNR w KQkq -

C07 French Defense: Tarrasch Variation, Open System, Süchting Line
1. e4 e6 2. d4 d5 3. Nd2 c5 4. c3
e2e4 e7e6 d2d4 d7d5 b1d2 c7c5 c2c3
rnbqkbnr/pp3ppp/4p3/2pp4/3PP3/2P5/PP1N1PPP/R1BQKBNR b KQkq -

C08 French Defense: Tarrasch Variation, Open System
1. e4 e6 2. d4 d5 3. Nd2 c5 4. exd5 exd5
e2e4 e7e6 d2d4 d7d5 b1d2 c7c5 e4d5 e6d5
rnbqkbnr/pp3ppp/8/2pp4/3P4/8/PPPN1PPP/R1BQKBNR w KQkq -

C08 French Defense: Tarrasch Variation, Open System, Advance Line
1. e4 e6 2. d4 d5 3. Nd2 c5 4. exd5 exd5 5. Ngf3 c4
e2e4 e7e6 d2d4 d7d5 b1d2 c7c5 e4d5 e6d5 g1f3 c5c4
rnbqkbnr/pp3ppp/8/3p4/2pP4/5N2/PPPN1PPP/R1BQKB1R w KQkq -

C09 French Defense: Tarrasch Variation, Open System, Main Line
1. e4 e6 2. d4 d5 3. Nd2 c5 4. exd5 exd5 5. Ngf3 Nc6
e2e4 e7e6 d2d4 d7d5 b1d2 c7c5 e4d5 e6d5 g1f3 b8c6
r1bqkbnr/pp3ppp/2n5/2pp4/3P4/5N2/PPPN1PPP/R1BQKB1R w KQkq -

C10 French Defense: Classical Variation, Svenonius Variation
1. e4 e6 2. d4 d5 3. Nc3 Nc6 4. exd5
e2e4 e7e6 d2d4 d7d5 b1c3 b8c6 e4d5
r1bqkbnr/ppp2ppp/2n1p3/3P4/3P4/2N5/PPP2PPP/R1BQKBNR b KQkq -

C10 French Defense: Paulsen Variation
1. e4 e6 2. d4 d5 3. Nc3
e2e4 e7e6 d2d4 d7d5 b1c3
rnbqkbnr/ppp2ppp/4p3/3p4/3PP3/2N5/PPP2PPP/R1BQKBNR b KQkq -

C10 French Defense: Rubinstein Variation
1. e4 e6 2. d4 d5 3. Nc3 dxe4
e2e4 e7e6 d2d4 d7d5 b1c3 d5e4
rnbqkbnr/ppp2ppp/4p3/8/3Pp3/2N5/PPP2PPP/R1BQKBNR w KQkq -

C10 French Defense: Rubinstein Variation, Blackburne Defense
1. e4 e6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nd7
e2e4 e7e6 d2d4 d7d5 b1c3 d5e4 c3e4 b8d7
r1bqkbnr/pppn1ppp/4p3/8/3PN3/8/PPP2PPP/R1BQKBNR w KQkq -

C10 French Defense: Rubinstein Variation, Capablanca Line
1. e4 e6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nd7 5. Nf3 Ngf6 6. Nxf6+ Nxf6 7. Ne5
e2e4 e7e6 d2d4 d7d5 b1c3 d5e4 c3e4 b8d7 g1f3 g8f6 e4f6 d7f6 f3e5
r1bqkb1r/ppp2ppp/4pn2/4N3/3P4/8/PPP2PPP/R1BQKB1R b KQkq -

C10 French Defense: Rubinstein Variation, Ellis Gambit
1. e4 e6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 e5
e2e4 e7e6 d2d4 d7d5 b1c3 d5e4 c3e4 e6e5
rnbqkbnr/ppp2ppp/8/4p3/3PN3/8/PPP2PPP/R1BQKBNR w KQkq -

C10 French Defense: Rubinstein Variation, Fort Knox Variation
1. e4 e6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bd7 5. Nf3 Bc6
e2e4 e7e6 d2d4 d7d5 b1c3 d5e4 c3e4 c8d7 g1f3 d7c6
rn1qkbnr/ppp2ppp/2b1p3/8/3PN3/5N2/PPP2PPP/R1BQKB1R w KQkq -

C10 French Defense: Rubinstein Variation, Kasparov Attack
1. e4 e6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nd7 5. Nf3 Ngf6 6. Nxf6+ Nxf6 7. c3
e2e4 e7e6 d2d4 d7d5 b1d2 d5e4 d2e4 b8d7 g1f3 g8f6 e4f6 d7f6 c2c3
r1bqkb1r/ppp2ppp/4pn2/8/3P4/2P2N2/PP3PPP/R1BQKB1R b KQkq -

C10 French Defense: Rubinstein Variation, Maric Variation
1. e4 e6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Qd5
e2e4 e7e6 d2d4 d7d5 b1c3 d5e4 c3e4 d8d5
rnb1kbnr/ppp2ppp/4p3/3q4/3PN3/8/PPP2PPP/R1BQKBNR w KQkq -

C10 Sicilian Defense: Marshall Gambit
1. e4 c5 2. Nc3 e6 3. d4 d5
e2e4 c7c5 b1c3 e7e6 d2d4 d7d5
rnbqkbnr/pp3ppp/4p3/2pp4/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq -

C11 French Defense: Burn Variation
1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5
e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5
rnbqkb1r/ppp2ppp/4pn2/3p2B1/3PP3/2N5/PPP2PPP/R2QKBNR b KQkq -

C11 French Defense: Classical Variation
1. e4 e6 2. d4 d5 3. Nc3 Nf6
e2e4 e7e6 d2d4 d7d5 b1c3 g8f6
rnbqkb1r/ppp2ppp/4pn2/3p4/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq -

C11 French Defense: Classical Variation, Burn Variation, Main Line
1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 dxe4 5. Nxe4 Be7 6. Bxf6 Bxf6 7. Nf3 O-O
e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 d5e4 c3e4 f8e7 g5f6 e7f6 g1f3 e8g8
rnbq1rk1/ppp2ppp/4pb2/8/3PN3/5N2/PPP2PPP/R2QKB1R w KQ -

C11 French Defense: Classical Variation, Burn Variation, Morozevich Line
1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 dxe4 5. Nxe4 Be7 6. Bxf6 gxf6
e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 d5e4 c3e4 f8e7 g5f6 g7f6
rnbqk2r/ppp1bp1p/4pp2/8/3PN3/8/PPP2PPP/R2QKBNR w KQkq -

C11 French Defense: Classical Variation, Delayed Exchange Variation
1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. exd5
e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 e4d5
rnbqkb1r/ppp2ppp/4pn2/3P4/3P4/2N5/PPP2PPP/R1BQKBNR b KQkq -

C11 French Defense: Classical Variation, Steinitz Variation
1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5
e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 e4e5
rnbqkb1r/ppp2ppp/4pn2/3pP3/3P4/2N5/PPP2PPP/R1BQKBNR b KQkq -

C11 French Defense: Classical Variation, Swiss Variation
1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bd3
e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 f1d3
rnbqkb1r/ppp2ppp/4pn2/3p4/3PP3/2NB4/PPP2PPP/R1BQK1NR b KQkq -

C11 French Defense: Henneberger Variation
1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Be3
e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1e3
rnbqkb1r/ppp2ppp/4pn2/3p4/3PP3/2N1B3/PPP2PPP/R2QKBNR b KQkq -

C11 French Defense: Steinitz Variation
1. e4 e6 2. d4 d5 3. Nc3 a6 4. Nf3 Nf6 5. e5 Nfd7
e2e4 e7e6 d2d4 d7d5 b1c3 a7a6 g1f3 g8f6 e4e5 f6d7
rnbqkb1r/1ppn1ppp/p3p3/3pP3/3P4/2N2N2/PPP2PPP/R1BQKB1R w KQkq -

C11 French Defense: Steinitz Variation
1. e4 e6 2. d4 d5 3. Nc3 a6 4. Nf3 Nf6 5. e5 Nfd7 6. a3
e2e4 e7e6 d2d4 d7d5 b1c3 a7a6 g1f3 g8f6 e4e5 f6d7 a2a3
rnbqkb1r/1ppn1ppp/p3p3/3pP3/3P4/P1N2N2/1PP2PPP/R1BQKB1R b KQkq -

C11 French Defense: Steinitz Variation
1. e4 e6 2. d4 d5 3. Nc3 a6 4. Nf3 Nf6 5. e5 Nfd7 6. Ne2
e2e4 e7e6 d2d4 d7d5 b1c3 a7a6 g1f3 g8f6 e4e5 f6d7 c3e2
rnbqkb1r/1ppn1ppp/p3p3/3pP3/3P4/5N2/PPP1NPPP/R1BQKB1R b KQkq -

C11 French Defense: Steinitz Variation
1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. dxc5 Nc6
e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 e4e5 f6d7 f2f4 c7c5 d4c5 b8c6
r1bqkb1r/pp1n1ppp/2n1p3/2PpP3/5P2/2N5/PPP3PP/R1BQKBNR w KQkq -

C11 French Defense: Steinitz Variation
1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. Nf3
e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 e4e5 f6d7 f2f4 c7c5 g1f3
rnbqkb1r/pp1n1ppp/4p3/2ppP3/3P1P2/2N2N2/PPP3PP/R1BQKB1R b KQkq -

C11 French Defense: Steinitz Variation, Boleslavsky Variation
1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. Nf3 Nc6 7. Be3
e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 e4e5 f6d7 f2f4 c7c5 g1f3 b8c6 c1e3
r1bqkb1r/pp1n1ppp/2n1p3/2ppP3/3P1P2/2N1BN2/PPP3PP/R2QKB1R b KQkq -

C11 French Defense: Steinitz Variation, Bradford Attack Variation
1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. dxc5 Bxc5 7. Qg4
e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 e4e5 f6d7 f2f4 c7c5 d4c5 f8c5 d1g4
rnbqk2r/pp1n1ppp/4p3/2bpP3/5PQ1/2N5/PPP3PP/R1B1KBNR b KQkq -

C11 French Defense: Steinitz Variation, Brodsky-Jones Variation
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
e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 e4e5 f6d7 f2f4 c7c5 d4c5 b8c6 a2a3 f8c5 d1g4 e8g8 g1f3 f7f6
r1bq1rk1/pp1n2pp/2n1pp2/2bpP3/5PQ1/P1N2N2/1PP3PP/R1B1KB1R w KQ -

C11 French Defense: Steinitz Variation, Gledhill Attack
1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. Qg4
e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 e4e5 f6d7 d1g4
rnbqkb1r/pppn1ppp/4p3/3pP3/3P2Q1/2N5/PPP2PPP/R1B1KBNR b KQkq -

C12 French Defense: MacCutcheon Variation
1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4
e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8b4
rnbqk2r/ppp2ppp/4pn2/3p2B1/1b1PP3/2N5/PPP2PPP/R2QKBNR w KQkq -

C12 French Defense: MacCutcheon Variation, Advance Variation
1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5
e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8b4 e4e5
rnbqk2r/ppp2ppp/4pn2/3pP1B1/1b1P4/2N5/PPP2PPP/R2QKBNR b KQkq -

C12 French Defense: MacCutcheon Variation, Bernstein Variation
1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. Bh4
e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8b4 e4e5 h7h6 g5h4
rnbqk2r/ppp2pp1/4pn1p/3pP3/1b1P3B/2N5/PPP2PPP/R2QKBNR b KQkq -

C12 French Defense: MacCutcheon Variation, Bogoljubow Variation
1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. exd5 Qxd5 6. Bxf6 gxf6 7. Qd2 Qa5
e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8b4 e4d5 d8d5 g5f6 g7f6 d1d2 d5a5
rnb1k2r/ppp2p1p/4pp2/q7/1b1P4/2N5/PPPQ1PPP/R3KBNR w KQkq -

C12 French Defense: MacCutcheon Variation, Chigorin Variation
1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. exf6
e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8b4 e4e5 h7h6 e5f6
rnbqk2r/ppp2pp1/4pP1p/3p2B1/1b1P4/2N5/PPP2PPP/R2QKBNR b KQkq -

C12 French Defense: MacCutcheon Variation, Dr. Olland Variation
1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. Bc1
e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8b4 e4e5 h7h6 g5c1
rnbqk2r/ppp2pp1/4pn1p/3pP3/1b1P4/2N5/PPP2PPP/R1BQKBNR b KQkq -

C12 French Defense: MacCutcheon Variation, Duras Variation
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
e2e4 e7e6 b1c3 d7d5 d2d4 g8f6 c1g5 f8b4 e4e5 h7h6 g5d2 b4c3 b2c3 f6e4 d1g4 e8f8 d2c1
rnbq1k1r/ppp2pp1/4p2p/3pP3/3Pn1Q1/2P5/P1P2PPP/R1B1KBNR b KQ -

C12 French Defense: MacCutcheon Variation, Exchange Variation
1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. exd5
e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8b4 e4d5
rnbqk2r/ppp2ppp/4pn2/3P2B1/1b1P4/2N5/PPP2PPP/R2QKBNR b KQkq -

C12 French Defense: MacCutcheon Variation, Grigoriev Variation
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
e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8b4 e4e5 h7h6 e5f6 h6g5 f6g7 h8g8 h2h4 g5h4 d1g4
rnbqk1r1/ppp2pP1/4p3/3p4/1b1P2Qp/2N5/PPP2PP1/R3KBNR b KQq -

C12 French Defense: MacCutcheon Variation, Janowski Variation
1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. Be3
e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8b4 e4e5 h7h6 g5e3
rnbqk2r/ppp2pp1/4pn1p/3pP3/1b1P4/2N1B3/PPP2PPP/R2QKBNR b KQkq -

C12 French Defense: MacCutcheon Variation, Lasker Variation
1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. Bd2 Bxc3
e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8b4 e4e5 h7h6 g5d2 b4c3
rnbqk2r/ppp2pp1/4pn1p/3pP3/3P4/2b5/PPPB1PPP/R2QKBNR w KQkq -

C12 French Defense: MacCutcheon Variation, Lasker Variation
1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. Bd2 Bxc3 7. bxc3 Ne4 8. Qg4 g6
e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8b4 e4e5 h7h6 g5d2 b4c3 b2c3 f6e4 d1g4 g7g6
rnbqk2r/ppp2p2/4p1pp/3pP3/3Pn1Q1/2P5/P1PB1PPP/R3KBNR w KQkq -

C12 French Defense: MacCutcheon Variation, Tartakower Variation
1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. Bd2 Nfd7
e2e4 e7e6 d2d4 d7d5 b1c3 g8f6 c1g5 f8b4 e4e5 h7h6 g5d2 f6d7
rnbqk2r/pppn1pp1/4p2p/3pP3/1b1P4/2N5/PPPB1PPP/R2QKBNR w KQkq -