Named Openings

A
Any move without 1.d4, 1.e4
1...any move without 1...d5, 1...Nf6
1...Nf6 any move without 2.c4
1...Nf6 2...any move without 2...e6, 2...g6

A0
— Any move without 1.c4, 1.d4, 1.e4

A00 Irregular Openings
— Any move without 1.b3, 1.f4, 1.Nf3, 1.c4, 1.d4, 1.e4

A01 Larsen's Opening
1.b3

A02 Bird's Opening
1.f4
— Any move without 1...d5

A03 Bird's Opening
1...d5

A04 Réti Opening
1.Nf3
— Any move without 1...Nf6, 1...d5

A05 Réti Opening
1.Nf3 Nf6

A06 Réti Opening
1.Nf3 d5
— Any move without 2.g3, 2.c4

A07 Réti Opening
King's Indian Attack
1.Nf3 d5 2.g3
— Any move without 2...c5

A08 Réti Opening
King's Indian Attack
1.Nf3 d5 2...c5

A09 Réti Opening
1.Nf3 d5 2.c4

A1
1.c4
— Any move without 1...e5, 1...c5

A10 English Opening
1.c4
— Any move without 1...c6, 1...e6, 1...Nf6, 1...e5, 1...c5

A11 English Opening
Caro—Kann defensive system
1...c6
— Any move without 2.Nf3
— 2.Nf3 any move without 2...d5
— 2...d5 any move without 3.b3

A12 English Opening
Caro—Kann defensive system
1...c6 2.Nf3 d5 3.b3

A13 English Opening
1...e6
— Any move without 2.Nf3
— 2.Nf3 any move without 2...d5
— 2...d5 any move without 3.g3
— 3...any move without 3...Nf6
— 3...Nf6 any move without 4.Bg2
— 4.Bg2 any move without 4...Be7

A14 English Opening
Neo-Catalan declined
1...e6 2.Nf3 d5 3...Nf6 4.Bg2 Be7

A15 English Opening
1...Nf6
— Any move without 2.Nc3

A16 English Opening
1...Nf6 2.Nc3
— Any move without 2...e6

A17 English Opening
Hedgehog Defence
1...Nf6 2.Nc3 e6
— Any move without 3.e4

A18 English Opening
Mikenas—Carls Variation
1...Nf6 2.Nc3 e6 3.e4
— Any move without 3...c5

A19 English Opening
Mikenas—Carls, Sicilian Variation
1...Nf6 2.Nc3 e6 3...c5

A2
1...e5

A20 English Opening
1...e5
— Any move without 2.Nc3

A21 English Opening
1...e5 2.Nc3
— Any move without 2...Nf6, 2...Nc6

A22 English Opening
1...e5 2.Nc3 Nf6
— Any move without 3.g3
— 3...any move without 3...c6, 3...g6

A23 English Opening
Bremen System, Keres Variation
1...e5 2.Nc3 Nf6 3...c6

A24 English Opening
Bremen System with 3...g6
1...e5 2.Nc3 Nf6 3...g6

A25 English Opening
Sicilian Reversed
1...e5 2.Nc3 Nc6
— Any move without 3.g3, 3.Nf3
— 3...any move without 3...g6
— 3...g6 any move without 4.Bg2
— 4.Bg2 any move without 4...Bg7
— 4...Bg7 any move without 5.d3

A26 English Opening
Closed System
1...e5 2.Nc3 Nc6 3...g6 4.Bg2 Bg7 5.d3

A27 English Opening
Three Knights System
1...e5 2.Nc3 Nc6 3.Nf3
— Any move without 3...Nf6

A28 English Opening
Four Knights System
1...e5 2.Nc3 Nc6 3.Nf3 Nf6
— Any move without 4.g3

A29 English Opening
Four Knights, Kingside Fianchetto
1...e5 2.Nc3 Nc6 3.Nf3 Nf6 4.g3

A3
1...c5

A30 English Opening
Symmetrical Defence
1...c5
— Any move without 2.Nf3, 2.Nc3
— 2.Nf3 any move without 2...Nf6
— 2...Nf6 any move without 3.d4

A31 English Opening
Symmetrical, Benoni formation
1...c5 2.Nf3 Nf6 3.d4
— Any move without 3...cd4
— 3...cd4 any move without 4.Nd4
— 4.Nd4 any move without 4...e6

A32 English Opening
Symmetrical Defence
1...c5 2.Nf3 Nf6 3...cd4 4.Nd4 e6
— Any move without 5.Nc3
— 5.Nc3 any move without 5...Nc6

A33 English Opening
Symmetrical Defence
1...c5 2.Nf3 Nf6 3...cd4 4.Nd4 e6 5.Nc3 Nc6

A34 English Opening
Symmetrical Defence
1...c5 2.Nc3
— Any move without 2...Nc6

A35 English Opening
Symmetrical Defence
1...c5 2.Nc3 Nc6
— Any move without 3.g3

A36 English Opening
Symmetrical Defence
1...c5 2.Nc3 Nc6 3.g3
— Any move without 3...g6
— 3...g6 any move without 4.Bg2
— 4.Bg2 any move without 4...Bg7
— 4...Bg7 any move without 5.Nf3

A37 English Opening
Symmetrical Defence
1...c5 2.Nc3 Nc6 3...g6 4.Bg2 Bg7 5.Nf3
— Any move without 5...Nf6

A38 English Opening
Symmetrical Defence
1...c5 2.Nc3 Nc6 3...g6 4.Bg2 Bg7 5.Nf3 Nf6
— Any move without 6.O O
— 6.O O any move without 6...O O
— 6...O O any move without 7.d4

A39 English Opening
Symmetrical Defence, Main line with d4
1...c5 2.Nc3 Nc6 3...g6 4.Bg2 Bg7 5.Nf3 Nf6 6.O O O O 7.d4

A4
1...
— Any move without 1...Nf6, 1...f5, 1...d5
— 1...Nf6 any move without 2.c4

A40 Queen's Pawn Game
1.d4
— Any move without 1...d6, 1...c5, 1...Nf6, 1...f5, 1...d5

A41 Queen's Pawn Game
Wade Defence
1...d6
— Any move without 2.c4

A42 Modern Defence
Averbakh System also Wade Defence
1...d6 2.c4

A43 Old Benoni Defence
1...c5
— Any move without 2.d5
— 2...any move without 2...e5

A44 Old Benoni Defence
1...c5 2...e5

A45 Queen's Pawn Game
1...Nf6
— Any move without 2.Nf3, 2.c4

A46 Queen's Pawn Game
Torre Attack
1...Nf6 2.Nf3
— Any move without 2...b6, 2...g6

A47 Queen's Indian Defence
1...Nf6 2.Nf3 b6

A48 King's Indian
East Indian Defence
1...Nf6 2.Nf3 g6
— Any move without 3.g3

A49 King's Indian
Fianchetto without c4
1...Nf6 2.Nf3 g6 3.g3

A5
1...Nf6 2.c4
— Any move without 2...c5, 2...e6, 2...g6
— 2...c5 any move without 3.d5
— 3...any move without 3...e6

A50 Queen's Pawn Game
Black Knights' Tango
1...Nf6 2.c4
— Any move without 2...e5, 2...d6, 2...c5, 2...e6, 2...g6

A51 Budapest Gambit declined
1...Nf6 2...e5
— Any move without 3.de5
— 3.de5 any move without 3...Ng4

A52 Budapest Gambit
1...Nf6 2...e5 3.de5 Ng4

A53 Old Indian Defence
1...Nf6 2...d6
— Any move without 3.Nc3
— 3.Nc3 any move without 3...e5
— 3...e5 any move without 4.Nf3

A54 Old Indian Defence
Ukrainian Variation
1...Nf6 2...d6 3.Nc3 e5 4.Nf3
— Any move without 4...Nbd7
— 4...Nbd7 any move without 5.e4

A55 Old Indian Defence
1...Nf6 2...d6 3.Nc3 e5 4.Nf3 Nbd7 5.e4

A56 Benoni Defence
1...Nf6 2...c5
— Any move without 3.d5
— 3...any move without 3...b5, 3...e6

A57 Volga Gambit
1...Nf6 2...c5 3...b5
— Any move without 4.cb5
— 4.cb5 any move without 4...a6
— 4...a6 any move without 5.ba6

A58 Volga Gambit
1...Nf6 2...c5 3...b5 4.cb5 a6 5.ba6
— Any move without 5...Ba6
— 5...Ba6 any move without 6.Nc3
— 6.Nc3 any move without 6...d6
— 6...d6 any move without 7.e4

A59 Volga Gambit
1...Nf6 2...c5 3...b5 4.cb5 a6 5.ba6 Ba6 6.Nc3 d6 7.e4

A6
1...Nf6 2...c5 3...e6

A60 Benoni Defence
1...Nf6 2...c5 3...e6
— Any move without 4.Nc3

A61 Benoni Defence
1...Nf6 2...c5 3...e6 4.Nc3
— Any move without 4...ed5
— 4...ed5 any move without 5.cd5
— 5.cd5 any move without 5...d6
— 5...d6 any move without 6.Nf3, 6.e4
— 6.Nf3 any move without 6...g6
— 6...g6 any move without 7.g3

A62 Benoni Defence
Fianchetto Variation
1...Nf6 2...c5 3...e6 4.Nc3 ed5 5.cd5 d6 6.Nf3 g6 7.g3
— Any move without 7...Bg7
— 7...Bg7 any move without 8.Bg2
— 8.Bg2 any move without 8...O O
— 8...O O any move without 9.O O
— 9.O O any move without 9...a6

A63 Benoni Defence
Fianchetto Variation
1...Nf6 2...c5 3...e6 4.Nc3 ed5 5.cd5 d6 6.Nf3 g6 7...Bg7 8.Bg2 O O 9.O O a6
— Any move without 10.a4
— 10...any move without 10...Nbd7
— 10...Nbd7 any move without 11.Nd2

A64 Benoni Defence
Fianchetto Variation
1...Nf6 2...c5 3...e6 4.Nc3 ed5 5.cd5 d6 6.Nf3 g6 7...Bg7 8.Bg2 O O 9.O O a6 10...Nbd7 11.Nd2

A65 Benoni Defence
1...Nf6 2...c5 3...e6 4.Nc3 ed5 5.cd5 d6 6.e4
— Any move without 6...g6
— 6...g6 any move without 7.f4, 7.Nf3

A66 Benoni Defence
Pawn Storm Variation
1...Nf6 2...c5 3...e6 4.Nc3 ed5 5.cd5 d6 6...g6 7.f4
— Any move without 7...Bg7
— 7...Bg7 any move without 8.Bb5, 8.Nf3

A67 Benoni Defence
Taimanov Variation
1...Nf6 2...c5 3...e6 4.Nc3 ed5 5.cd5 d6 6...g6 7...Bg7 8.Bb5

A68 Benoni Defence
Four Pawns Attack
1...Nf6 2...c5 3...e6 4.Nc3 ed5 5.cd5 d6 6...g6 7...Bg7 8.Nf3
— Any move without 8...O O
— 8...O O any move without 9.Be2
— 9.Be2 any move without 9...Re8

A69 Benoni Defence
Four Pawns Attack
1...Nf6 2...c5 3...e6 4.Nc3 ed5 5.cd5 d6 6...g6 7...Bg7 8.Nf3 O O 9.Be2 Re8

A7
1...Nf6 2...c5 3...e6 4.Nc3 ed5 5.cd5 d6 6...g6 7.Nf3

A70 Benoni Defence
1...Nf6 2...c5 3...e6 4.Nc3 ed5 5.cd5 d6 6...g6 7.Nf3
— Any move without 7...Bg7
— 7...Bg7 any move without 8.Bg5, 8.Be2

A71 Benoni Defence
1...Nf6 2...c5 3...e6 4.Nc3 ed5 5.cd5 d6 6...g6 7.Nf3 Bg7 8.Bg5

A72 Benoni Defence
1...Nf6 2...c5 3...e6 4.Nc3 ed5 5.cd5 d6 6...g6 7.Nf3 Bg7 8.Be2
— Any move without 8...O O
— 8...O O any move without 9.O O

A73 Benoni Defence
1...Nf6 2...c5 3...e6 4.Nc3 ed5 5.cd5 d6 6...g6 7.Nf3 Bg7 8.Be2 O O 9.O O
— Any move without 9...a6, 9...Re8

A74 Benoni Defence
1...Nf6 2...c5 3...e6 4.Nc3 ed5 5.cd5 d6 6...g6 7.Nf3 Bg7 8.Be2 O O 9.O O a6
— Any move without 10.a4
— 10...any move without 10...Bg4

A75 Benoni Defence
1...Nf6 2...c5 3...e6 4.Nc3 ed5 5.cd5 d6 6...g6 7.Nf3 Bg7 8.Be2 O O 9.O O a6 10...Bg4

A76 Benoni Defence
1...Nf6 2...c5 3...e6 4.Nc3 ed5 5.cd5 d6 6...g6 7.Nf3 Bg7 8.Be2 O O 9.O O Re8
— Any move without 10.Nd2

A77 Benoni Defence
1...Nf6 2...c5 3...e6 4.Nc3 ed5 5.cd5 d6 6...g6 7.Nf3 Bg7 8.Be2 O O 9.O O Re8 10.Nd2
— Any move without 10...Na6

A78 Benoni Defence
1...Nf6 2...c5 3...e6 4.Nc3 ed5 5.cd5 d6 6...g6 7.Nf3 Bg7 8.Be2 O O 9.O O Re8 10.Nd2 Na6
— Any move without 11.f3

A79 Benoni Defence
1...Nf6 2...c5 3...e6 4.Nc3 ed5 5.cd5 d6 6...g6 7.Nf3 Bg7 8.Be2 O O 9.O O Re8 10.Nd2 Na6 11.f3

A8
1...f5
— Any move without 2.c4
— 2...any move without 2...Nf6
— 2...Nf6 any move without 3.g3
— 3...any move without 3...e6

A80 Dutch Defence
1...f5
— Any move without 2.g3, 2.e4, 2.c4

A81 Dutch Defence
1...f5 2.g3

A82 Dutch Defence
Staunton Gambit
1...f5 2.e4
— Any move without 2...fe4
— 2...fe4 any move without 3.Nc3
— 3.Nc3 any move without 3...Nf6
— 3...Nf6 any move without 4.Bg5

A83 Dutch Defence
Staunton Gambit
1...f5 2...fe4 3.Nc3 Nf6 4.Bg5

A84 Dutch Defence
1...f5 2.c4
— Any move without 2...Nf6
— 2...Nf6 any move without 3.Nc3, 3.g3

A85 Dutch Defence
1...f5 2...Nf6 3.Nc3

A86 Dutch Defence
Leningrad System
1...f5 2...Nf6 3.g3
— Any move without 3...g6, 3...e6
— 3...g6 any move without 4.Bg2
— 4.Bg2 any move without 4...Bg7
— 4...Bg7 any move without 5.Nf3

A87 Dutch Defence
Leningrad System
1...f5 2...Nf6 3...g6 4.Bg2 Bg7 5.Nf3
— Any move without 5...O O
— 5...O O any move without 6.O O
— 6.O O any move without 6...d6
— 6...d6 any move without 7.Nc3
— 7.Nc3 any move without 7...c6, 7...Nc6

A88 Dutch Defence
Leningrad System
1...f5 2...Nf6 3...g6 4.Bg2 Bg7 5.Nf3 O O 6.O O d6 7.Nc3 c6

A89 Dutch Defence
Leningrad System
1...f5 2...Nf6 3...g6 4.Bg2 Bg7 5.Nf3 O O 6.O O d6 7.Nc3 Nc6

A9
1...f5 2...Nf6 3...e6

A90 Dutch Defence
1...f5 2...Nf6 3...e6
— Any move without 4.Bg2
— 4.Bg2 any move without 4...Be7

A91 Dutch Defence
1...f5 2...Nf6 3...e6 4.Bg2 Be7
— Any move without 5.Nf3

A92 Dutch Defence
Stonewall Variation
1...f5 2...Nf6 3...e6 4.Bg2 Be7 5.Nf3
— Any move without 5...O O
— 5...O O any move without 6.O O
— 6.O O any move without 6...d5, 6...d6
— 6...d5 any move without 7.b3, 7.Nc3

A93 Dutch Defence
Stonewall Variation
1...f5 2...Nf6 3...e6 4.Bg2 Be7 5.Nf3 O O 6.O O d5 7.b3
— Any move without 7...c6

A94 Dutch Defence
Stonewall Variation
1...f5 2...Nf6 3...e6 4.Bg2 Be7 5.Nf3 O O 6.O O d5 7...c6

A95 Dutch Defence
Stonewall Variation
1...f5 2...Nf6 3...e6 4.Bg2 Be7 5.Nf3 O O 6.O O d5 7.Nc3

A96 Dutch Defence
Ilyin—Genevsky System
1...f5 2...Nf6 3...e6 4.Bg2 Be7 5.Nf3 O O 6.O O d6
— Any move without 7.Nc3
— 7.Nc3 any move without 7...Qe8

A97 Dutch Defence
Ilyin—Genevsky System
1...f5 2...Nf6 3...e6 4.Bg2 Be7 5.Nf3 O O 6.O O d6 7.Nc3 Qe8
— Any move without 8.Qc2, 8.b3

A98 Dutch Defence
Ilyin—Genevsky System
1...f5 2...Nf6 3...e6 4.Bg2 Be7 5.Nf3 O O 6.O O d6 7.Nc3 Qe8 8.Qc2

A99 Dutch Defence
Ilyin—Genevsky System
1...f5 2...Nf6 3...e6 4.Bg2 Be7 5.Nf3 O O 6.O O d6 7.Nc3 Qe8 8.b3

B
1...any move without 1...c5, 1...e6, 1...e5
1...c5

B0
1.e4
— Any move without 1...c6, 1...c5, 1...e6, 1...e5

B00 Nimzowitsch Defence
1.e4
— Any move without 1...d5, 1...Nf6, 1...g6, 1...d6, 1...c6, 1...c5, 1...e6, 1...e5

B01 Scandinavian Defence
1...d5

B02 Alekhine's Defence
1...Nf6
— Any move without 2.e5
— 2...any move without 2...Nd5
— 2...Nd5 any move without 3.d4

B03 Alekhine's Defence
1...Nf6 2...Nd5 3.d4
— Any move without 3...d6
— 3...d6 any move without 4.Nf3

B04 Alekhine's Defence
Modern Variation
1...Nf6 2...Nd5 3...d6 4.Nf3
— Any move without 4...Bg4

B05 Alekhine's Defence
Modern Variation
1...Nf6 2...Nd5 3...d6 4.Nf3 Bg4

B06 Robatsch (Modern) Defence
1...g6

B07 Pirc Defence
1...d6
— Any move without 2.d4
— 2...any move without 2...Nf6
— 2...Nf6 any move without 3.Nc3
— 3.Nc3 any move without 3...g6
— 3...g6 any move without 4.Nf3, 4.f4

B08 Pirc Defence
Classical (Two Knights) System
1...d6 2...Nf6 3.Nc3 g6 4.Nf3

B09 Pirc Defence
Austrian attack
1...d6 2...Nf6 3.Nc3 g6 4.f4

B1
1...c6

B10 Caro-Kann Defence
1...c6
— Any move without 2.Nc3, 2.d4

B11 Caro-Kann Defence
1...c6 2.Nc3

B12 Caro-Kann Defence
1...c6 2.d4
— Any move without 2...d5
— 2...d5 any move without 3.ed5, 3.Nc3

B13 Caro-Kann Defence
1...c6 2...d5 3.ed5
— Any move without 3...cd5
— 3...cd5 any move without 4.c4
— 4...any move without 4...Nf6
— 4...Nf6 any move without 5.Nc3
— 5.Nc3 any move without 5...e6

B14 Caro-Kann Defence
1...c6 2...d5 3.ed5 cd5 4...Nf6 5.Nc3 e6

B15 Caro-Kann Defence
1...c6 2...d5 3.Nc3
— Any move without 3...de4
— 3...de4 any move without 4.Ne4
— 4.Ne4 any move without 4...Nf6, 4...Nd7, 4...Bf5
— 4...Nf6 any move without 5.Nf6
— 5.Nf6 ef6

B16 Caro-Kann Defence
1...c6 2...d5 3.Nc3 de4 4.Ne4 Nf6 5.Nf6 gf6

B17 Caro-Kann Defence
1...c6 2...d5 3.Nc3 de4 4.Ne4 Nd7

B18 Caro-Kann Defence
1...c6 2...d5 3.Nc3 de4 4.Ne4 Bf5
— Any move without 5.Ng3
— 5.Ng3 any move without 5...Bg6
— 5...Bg6 any move without 6.h4
— 6...any move without 6...h6
— 6...h6 any move without 7.Nf3

B19 Caro-Kann Defence
1...c6 2...d5 3.Nc3 de4 4.Ne4 Bf5 5.Ng3 Bg6 6...h6 7.Nf3

B2
1...c5
— Any move without 2.Nf3
— 2.Nf3 any move without 2...Nc6, 2...e6, 2...d6

B20 Sicilian Defence
1...c5
— Any move without 2.f4, 2.c3, 2.Nc3, 2.Nf3

B21 Sicilian Defence
1...c5 2.f4

B22 Sicilian Defence
Alapin Variation
1...c5 2.c3

B23 Sicilian Defence
Closed System
1...c5 2.Nc3
— Any move without 2...Nc6
— 2...Nc6 any move without 3.g3

B24 Sicilian Defence
Closed System
1...c5 2.Nc3 Nc6 3.g3
— Any move without 3...g6
— 3...g6 any move without 4.Bg2
— 4.Bg2 any move without 4...Bg7
— 4...Bg7 any move without 5.d3
— 5...any move without 5...d6

B25 Sicilian Defence
Closed System
1...c5 2.Nc3 Nc6 3...g6 4.Bg2 Bg7 5...d6
— Any move without 6.Be3

B26 Sicilian Defence
Closed System
1...c5 2.Nc3 Nc6 3...g6 4.Bg2 Bg7 5...d6 6.Be3

B27 Sicilian Defence
Katalimov Variation
1...c5 2.Nf3
— Any move without 2...a6, 2...Nf6, 2...Nc6, 2...e6, 2...d6

B28 Sicilian Defence
O'Kelly Variation
1...c5 2.Nf3 a6

B29 Sicilian Defence
Nimzowitsch—Rubinstein Variation
1...c5 2.Nf3 Nf6

B3
1...c5 2.Nf3 Nc6

B30 Sicilian Defence
Rossolimo Variation
1...c5 2.Nf3 Nc6
— Any move without 3.Bb5, 3.d4
— 3.Bb5 any move without 3...g6

B31 Sicilian Defence
Nimzowitsch—Rossolimo Attack
1...c5 2.Nf3 Nc6 3.Bb5 g6

B32 Sicilian Defence
La Bourdonnais Variation
1...c5 2.Nf3 Nc6 3.d4
— Any move without 3...cd4
— 3...cd4 any move without 4.Nd4
— 4.Nd4 any move without 4...Nf6, 4...g6

B33 Sicilian Defence
Lasker Variation
1...c5 2.Nf3 Nc6 3...cd4 4.Nd4 Nf6

B34 Sicilian Defence
Simagin Variation
1...c5 2.Nf3 Nc6 3...cd4 4.Nd4 g6
— Any move without 5.Nc3, 5.c4
— 5.Nc3 any move without 5...Bg7
— 5...Bg7 any move without 6.Be3
— 6.Be3 any move without 6...Nf6
— 6...Nf6 any move without 7.Bc4

B35 Sicilian Defence
Simagin Variation
1...c5 2.Nf3 Nc6 3...cd4 4.Nd4 g6 5.Nc3 Bg7 6.Be3 Nf6 7.Bc4

B36 Sicilian Defence
Maróczy Bind
1...c5 2.Nf3 Nc6 3...cd4 4.Nd4 g6 5.c4
— Any move without 5...Bg7

B37 Sicilian Defence
Maróczy Bind
1...c5 2.Nf3 Nc6 3...cd4 4.Nd4 g6 5...Bg7
— Any move without 6.Be3

B38 Sicilian Defence
Maróczy Bind
1...c5 2.Nf3 Nc6 3...cd4 4.Nd4 g6 5...Bg7 6.Be3
— Any move without 6...Nf6
— 6...Nf6 any move without 7.Nc3
— 7.Nc3 any move without 7...Ng4

B39 Sicilian Defence
Maróczy Bind
1...c5 2.Nf3 Nc6 3...cd4 4.Nd4 g6 5...Bg7 6.Be3 Nf6 7.Nc3 Ng4

B4
1...c5 2.Nf3 e6

B40 Sicilian Defence
Paulsen Variation
1...c5 2.Nf3 e6
— Any move without 3.d4

B41 Sicilian Defence
Paulsen Variation
1...c5 2.Nf3 e6 3.d4
— Any move without 3...cd4
— 3...cd4 any move without 4.Nd4
— 4.Nd4 any move without 4...a6, 4...Nc6
— 4...a6 any move without 5.Bd3, 5.Nc3

B42 Sicilian Defence
Paulsen Variation
1...c5 2.Nf3 e6 3...cd4 4.Nd4 a6 5.Bd3

B43 Sicilian Defence
Paulsen Variation
1...c5 2.Nf3 e6 3...cd4 4.Nd4 a6 5.Nc3

B44 Sicilian Defence
Paulsen Variation
1...c5 2.Nf3 e6 3...cd4 4.Nd4 Nc6
— Any move without 5.Nc3

B45 Sicilian Defence
Paulsen Variation
1...c5 2.Nf3 e6 3...cd4 4.Nd4 Nc6 5.Nc3
— Any move without 5...a6, 5...Qc7

B46 Sicilian Defence
Paulsen Variation
1...c5 2.Nf3 e6 3...cd4 4.Nd4 Nc6 5.Nc3 a6

B47 Sicilian Defence
Paulsen Variation
1...c5 2.Nf3 e6 3...cd4 4.Nd4 Nc6 5.Nc3 Qc7
— Any move without 6.Be3

B48 Sicilian Defence
Paulsen Variation
1...c5 2.Nf3 e6 3...cd4 4.Nd4 Nc6 5.Nc3 Qc7 6.Be3
— Any move without 6...a6
— 6...a6 any move without 7.Be2

B49 Sicilian Defence
Paulsen Variation
1...c5 2.Nf3 e6 3...cd4 4.Nd4 Nc6 5.Nc3 Qc7 6.Be3 a6 7.Be2

B5
1...c5 2.Nf3 d6
— Any move without 3.d4
— 3...any move without 3...cd4
— 3...cd4 any move without 4.Nd4
— 4.Nd4 any move without 4...Nf6
— 4...Nf6 any move without 5.Nc3
— 5.Nc3 any move without 5...Nc6, 5...g6, 5...e6, 5...a6
— 5...Nc6 any move without 6.Bg5

B50 Sicilian Defence
1...c5 2.Nf3 d6
— Any move without 3.Bb5, 3.d4

B51 Sicilian Defence
Canal—Sokolsky Attack
1...c5 2.Nf3 d6 3.Bb5
— Any move without 3...Bd7

B52 Sicilian Defence
Canal—Sokolsky Attack
1...c5 2.Nf3 d6 3.Bb5 Bd7

B53 Sicilian Defence
Chekhover Variation
1...c5 2.Nf3 d6 3.d4
— Any move without 3...cd4
— 3...cd4 any move without 4.Nd4

B54 Sicilian Defence
1...c5 2.Nf3 d6 3...cd4 4.Nd4
— Any move without 4...Nf6

B55 Sicilian Defence
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6
— Any move without 5.f3, 5.Nc3
— 5.f3

B56 Sicilian Defence
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3
— Any move without 5...Nc6, 5...g6, 5...e6, 5...a6
— 5...Nc6 any move without 6.Bc4, 6.Be2, 6.Bg5

B57 Sicilian Defence
Sozin Attack
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 Nc6 6.Bc4

B58 Sicilian Defence
Boleslavsky Variation
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 Nc6 6.Be2
— Any move without 6...e5
— 6...e5 any move without 7.Nb3

B59 Sicilian Defence
Boleslavsky Variation
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 Nc6 6.Be2 e5 7.Nb3

B6
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 Nc6 6.Bg5

B60 Sicilian Defence
Richter—Rauzer Attack
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 Nc6 6.Bg5
— Any move without 6...Bd7, 6...e6
— 6...Bd7 any move without 7.Qd2

B61 Sicilian Defence
Richter—Rauzer Attack
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 Nc6 6.Bg5 Bd7 7.Qd2

B62 Sicilian Defence
Richter—Rauzer Attack
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 Nc6 6.Bg5 e6
— Any move without 7.Qd2

B63 Sicilian Defence
Richter—Rauzer Attack
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2
— Any move without 7...Be7, 7...a6
— 7...Be7 any move without 8.O O O
— 8.O O O any move without 8...O O
— 8...O O any move without 9.f4

B64 Sicilian Defence
Richter—Rauzer Attack
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 Be7 8.O O O O O 9.f4
— Any move without 9...Nd4

B65 Sicilian Defence
Richter—Rauzer Attack
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 Be7 8.O O O O O 9...Nd4 10.Qd4

B66 Sicilian Defence
Richter—Rauzer Attack
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 a6
— Any move without 8.O O O
— 8.O O O any move without 8...Bd7

B67 Sicilian Defence
Richter—Rauzer Attack
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 a6 8.O O O Bd7
— Any move without 9.f4
— 9...any move without 9...Be7

B68 Sicilian Defence
Richter—Rauzer Attack
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 a6 8.O O O Bd7 9...Be7
— Any move without 10.Nf3
— 10.Nf3 any move without 10...b5
— 10...b5 any move without 11.Bf6

B69 Sicilian Defence
Richter—Rauzer Attack
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 a6 8.O O O Bd7 9...Be7 10.Nf3 b5 11.Bf6

B7
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 g6

B70 Sicilian Defence
Dragon Variation
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 g6
— Any move without 6.f4, 6.Be3

B71 Sicilian Defence
Dragon Variation
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 g6 6.f4

B72 Sicilian Defence
Dragon Variation
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 g6 6.Be3
— Any move without 6...Bg7
— 6...Bg7 any move without 7.Be2, 7.f3
— 7.Be2 any move without 7...Nc6
— 7...Nc6 any move without 8.O O

B73 Sicilian Defence
Dragon Variation
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.Be2 Nc6 8.O O
— Any move without 8...O O
— 8...O O any move without 9.Nb3

B74 Sicilian Defence
Dragon Variation
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.Be2 Nc6 8.O O O O 9.Nb3

B75 Sicilian Defence
Dragon Variation
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3
— Any move without 7...O O

B76 Sicilian Defence
Dragon Variation
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7...O O
— Any move without 8.Qd2
— 8.Qd2 any move without 8...Nc6
— 8...Nc6 any move without 9.Bc4

B77 Sicilian Defence
Dragon Variation
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7...O O 8.Qd2 Nc6 9.Bc4
— Any move without 9...Bd7
— 9...Bd7 any move without 10.O O O

B78 Sicilian Defence
Dragon Variation
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7...O O 8.Qd2 Nc6 9.Bc4 Bd7 10.O O O
— Any move without 10...Qa5

B79 Sicilian Defence
Dragon Variation
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7...O O 8.Qd2 Nc6 9.Bc4 Bd7 10.O O O Qa5

B8
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 e6

B80 Sicilian Defence
Scheveningen Variation
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 e6
— Any move without 6.g4, 6.f4, 6.Be2, 6.Bc4

B81 Sicilian Defence
Scheveningen Variation
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 e6 6.g4

B82 Sicilian Defence
Scheveningen Variation
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 e6 6.f4

B83 Sicilian Defence
Scheveningen Variation
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 e6 6.Be2
— Any move without 6...a6

B84 Sicilian Defence
Scheveningen Variation
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 e6 6.Be2 a6
— Any move without 7.O O

B85 Sicilian Defence
Scheveningen Variation
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 e6 6.Be2 a6 7.O O

B86 Sicilian Defence
Sozin Attack
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 e6 6.Bc4
— Any move without 6...a6, 6...Nc6
— 6...a6 any move without 7.Bb3
— 7.Bb3 any move without 7...b5

B87 Sicilian Defence
Sozin Attack
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 e6 6.Bc4 a6 7.Bb3 b5

B88 Sicilian Defence
Sozin Attack
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 e6 6.Bc4 Nc6
— Any move without 7.Be3

B89 Sicilian Defence
Sozin Attack
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 e6 6.Bc4 Nc6 7.Be3

B9
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 a6

B90 Sicilian Defence
Najdorf Variation
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 a6
— Any move without 6.g3, 6.Be2, 6.f4, 6.Bg5

B91 Sicilian Defence
Najdorf Variation
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 a6 6.g3

B92 Sicilian Defence
Najdorf Variation
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 a6 6.Be2

B93 Sicilian Defence
Najdorf Variation
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 a6 6.f4

B94 Sicilian Defence
Najdorf Variation
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 a6 6.Bg5
— Any move without 6...e6

B95 Sicilian Defence
Najdorf Variation
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 a6 6.Bg5 e6
— Any move without 7.f4

B96 Sicilian Defence
Najdorf Variation
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4
— Any move without 7...Qb6, 7...Be7

B97 Sicilian Defence
Najdorf Variation
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 a6 6.Bg5 e6 7...Qb6

B98 Sicilian Defence
Najdorf Variation
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 a6 6.Bg5 e6 7...Be7
— Any move without 8.Qf3
— 8.Qf3 any move without 8...Qc7
— 8...Qc7 any move without 9.O O O
— 9.O O O any move without 9...Nbd7

B99 Sicilian Defence
Najdorf Variation
1...c5 2.Nf3 d6 3...cd4 4.Nd4 Nf6 5.Nc3 a6 6.Bg5 e6 7...Be7 8.Qf3 Qc7 9.O O O Nbd7

C
1...e6
1...e5

C0
1...e6
— Any move without 2.d4
— 2...any move without 2...d5
— 2...d5 any move without 3.Nc3

C00 French Defence
1...e6
- any move without 2.d4

C01 French Defence
Exchange Variation
1...e6 2.d4
— Any move without 2...d5
— 2...d5 any move without 3.e5, 3.Nd2, 3.Nc3

C02 French Defence
Advance Variation
1...e6 2...d5 3.e5

C03 French Defence
Tarrasch Variation
1...e6 2...d5 3.Nd2
— Any move without 3...Nc6, 3...Nf6, 3...c5

C04 French Defence
Tarrasch Variation
1...e6 2...d5 3.Nd2 Nc6

C05 French Defence
Tarrasch Variation
1...e6 2...d5 3.Nd2 Nf6
— Any move without 4.e5
— 4...any move without 4...Nfd7
— 4...Nfd7 any move without 5.Bd3

C06 French Defence
Tarrasch Variation
1...e6 2...d5 3.Nd2 Nf6 4...Nfd7 5.Bd3

C07 French Defence
Tarrasch Variation
1...e6 2...d5 3.Nd2 c5
— Any move without 4.ed5
— 4.ed5 any move without 4...ed5

C08 French Defence
Tarrasch Variation
1...e6 2...d5 3.Nd2 c5 4.ed5 ed5
— Any move without 5.Ngf3
— 5.Ngf3 any move without 5...Nc6

C09 French Defence
Tarrasch Variation
1...e6 2...d5 3.Nd2 c5 4.ed5 ed5 5.Ngf3 Nc6

C1
1...e6 2...d5 3.Nc3

C10 French Defence
1...e6 2...d5 3.Nc3
— Any move without 3...Nf6, 3...Bb4

C11 French Defence
1...e6 2...d5 3.Nc3 Nf6
— Any move without 4.Bg5

C12 French Defence
1...e6 2...d5 3.Nc3 Nf6 4.Bg5
— Any move without 4...de4, 4...Be7

C13 French Defence
Classical Variation
1...e6 2...d5 3.Nc3 Nf6 4.Bg5 de4

C14 French Defence
Classical Variation
1...e6 2...d5 3.Nc3 Nf6 4.Bg5 Be7

C15 French Defence
Winawer (Nimzovich) Variation
1...e6 2...d5 3.Nc3 Bb4
— Any move without 4.e5

C16 French Defence
Winawer, Advance Variation
1...e6 2...d5 3.Nc3 Bb4 4.e5
— Any move without 4...c5

C17 French Defence
Winawer, Advance Variation
1...e6 2...d5 3.Nc3 Bb4 4...c5
— Any move without 5.a3

C18 French Defence
Winawer, Advance Variation
1...e6 2...d5 3.Nc3 Bb4 4...c5 5.a3
— Any move without 5...Bc3
— 5...Bc3 6.bc3 any move without 6...Ne7
— 6...Ne7 any move without 7.Qg4

C19 French Defence
Winawer, Advance Variation
1...e6 2...d5 3.Nc3 Bb4 4...c5 5...Bc3 6.bc3 Ne7 7.Qg4

C2
1...e5
— Any move without 2.f4, 2.Nf3

C20 King's Pawn Game
1...e5
— Any move without 2.d4, 2.Bc4, 2.Nc3, 2.f4, 2.Nf3

C21 Center Game
1...e5 2.d4
— Any move without 2...ed4
— 2...ed4 any move without 3.Qd4

C22 Center Game
1...e5 2...ed4 3.Qd4

C23 Bishop's Opening
1...e5 2.Bc4
— Any move without 2...Nf6

C24 Bishop's Opening
Berlin Defence
1...e5 2.Bc4 Nf6

C25 Vienna Game
1...e5 2.Nc3
— Any move without 2...Nf6

C26 Vienna Game
1...e5 2.Nc3 Nf6
— Any move without 3.Bc4, 3.f4

C27 Vienna Game
1...e5 2.Nc3 Nf6 3.Bc4
— Any move without 3...Nc6

C28 Vienna Game
1...e5 2.Nc3 Nf6 3.Bc4 Nc6

C29 Vienna Game
Kaufmann Variation
1...e5 2.Nc3 Nf6 3.f4

C3
1...e5 2.f4

C30 King's Gambit
1...e5 2.f4
— Any move without 2...d5, 2...ef4

C31 King's Gambit Declined
Falkbeer Counter Gambit
1...e5 2...d5
— Any move without 3.ed5
— 3.ed5 any move without 3...e4

C32 King's Gambit Declined
Falkbeer Counter Gambit
1...e5 2...d5 3.ed5 e4

C33 King's Gambit Accepted
1...e5 2...ef4
— Any move without 3.Nf3

C34 King's Gambit Accepted
1...e5 2...ef4 3.Nf3
— Any move without 3...Be7, 3...d5, 3...g5

C35 King's Gambit Accepted
Cunningham Variation
1...e5 2...ef4 3.Nf3 Be7

C36 King's Gambit Accepted
Modern Variation
1...e5 2...ef4 3.Nf3 d5

C37 King's Gambit Accepted
1...e5 2...ef4 3.Nf3 g5
— Any move without 4.Bc4, 4.h4
— 4.Bc4 any move without 4...Bg7

C38 King's Gambit Accepted
Greco & Philidor Gambits
1...e5 2...ef4 3.Nf3 g5 4.Bc4 Bg7

C39 King's Gambit Accepted
Allagier & Kiesertisky Gambits
1...e5 2...ef4 3.Nf3 g5 4.h4

C4
1...e5 2.Nf3
— Any move without 2...Nc6
— 2...Nc6 any move without 3.Bc4, 3.Bb5

C40 King's Knight Opening
1...e5 2.Nf3
— Any move without 2...d6, 2...Nf6, 2...Nc6

C41 Philidor Defence
1...e5 2.Nf3 d6

C42 Petrov's Defence
1...e5 2.Nf3 Nf6
— Any move without 3.d4

C43 Petrov's Defence
1...e5 2.Nf3 Nf6 3.d4

C44 Ponziani Opening
1...e5 2.Nf3 Nc6
— Any move without 3.d4, 3.Nc3, 3.Bc4, 3.Bb5
— 3...any move without 3...ed4
— 3...ed4 any move without 4.Nd4

C45 Scotch Game
1...e5 2.Nf3 Nc6 3...ed4 4.Nd4

C46 Three Knights Game
1...e5 2.Nf3 Nc6 3.Nc3
— Any move without 3...Nf6

C47 Four Knights Game
1...e5 2.Nf3 Nc6 3.Nc3 Nf6
— Any move without 4.Bb5

C48 Four Knights Game
Spanish Variation
1...e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5
— Any move without 4...Bb4

C49 Four Knights Game
Double Ruy Lopez
1...e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4

C5
1...e5 2.Nf3 Nc6 3.Bc4

C50 King's Pawn Game
1...e5 2.Nf3 Nc6 3.Bc4
— Any move without 3...Bc5, 3...Nf6
— 3...Bc5 any move without 4.b4, 4.c3

C51 Evans Gambit
1...e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4
— Any move without 4...Bb4
— 4...Bb4 any move without 5.c3
— 5...any move without 5...Ba5

C52 Evans Gambit
1...e5 2.Nf3 Nc6 3.Bc4 Bc5 4...Bb4 5...Ba5

C53 Giuoco Piano
1...e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3
— Any move without 4...Nf6

C54 Giuoco Piano
1...e5 2.Nf3 Nc6 3.Bc4 Bc5 4...Nf6

C55 Two Knights Defence
1...e5 2.Nf3 Nc6 3.Bc4 Nf6
— Any move without 4.d4, 4.Ng5

C56 Two Knights Defence
1...e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4

C57 Two Knights Defence
1...e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5
— Any move without 4...d5
— 4...d5 any move without 5.ed5
— 5.ed5 any move without 5...Na5

C58 Two Knights Defence
1...e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.ed5 Na5
— Any move without 6.Bb5
— 6.Bb5 any move without 6...c6
— 6...c6 any move without 7.dc6
— 7.dc6 any move without 7...bc6
— 7...bc6 any move without 8.Be2

C59 Two Knights Defence
1...e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.ed5 Na5 6.Bb5 c6 7.dc6 bc6 8.Be2

C6
1...e5 2.Nf3 Nc6 3.Bb5
— Any move without 3...a6
— 3...a6 any move without 4.Ba4

C60 Ruy Lopez
1...e5 2.Nf3 Nc6 3.Bb5
— Any move without 3...Nd4, 3...d6, 3...f5, 3...Bc5, 3...Nf6, 3...a6

C61 Ruy Lopez
Bird's Defence
1...e5 2.Nf3 Nc6 3.Bb5 Nd4

C62 Ruy Lopez
Old Steinitz Defence
1...e5 2.Nf3 Nc6 3.Bb5 d6

C63 Ruy Lopez
Schliemann Defence
1...e5 2.Nf3 Nc6 3.Bb5 f5

C64 Ruy Lopez
Classical (Cordel) Defence
1...e5 2.Nf3 Nc6 3.Bb5 Bc5

C65 Ruy Lopez
Berlin Defence
1...e5 2.Nf3 Nc6 3.Bb5 Nf6
— Any move without 4.O O
— 4.O O any move without 4...d6, 4...Ne4

C66 Ruy Lopez
Berlin Defence
1...e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O O d6

C67 Ruy Lopez
Berlin Defence
1...e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O O Ne4

C68 Ruy Lopez
Exchange Variation
1...e5 2.Nf3 Nc6 3.Bb5 a6
— Any move without 4.Bc6, 4.Ba4
— 4.Bc6 any move without 4...dc6
— 4...dc6 any move without 5.O O
— 5.O O any move without 5...f6

C69 Ruy Lopez
Exchange Variation
1...e5 2.Nf3 Nc6 3.Bb5 a6 4.Bc6 dc6 5.O O f6

C7
1...e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4
— Any move without 4...Nf6
— 4...Nf6 any move without 5.O O
— 5.O O any move without 5...Ne4, 5...Be7

C70 Ruy Lopez
1...e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4
— Any move without 4...d6, 4...Nf6

C71 Ruy Lopez
Modern Steinitz Defence
1...e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6
— Any move without 5.O O, 5.Bc6, 5.c3

C72 Ruy Lopez
Modern Steinitz Defence
1...e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.O O

C73 Ruy Lopez
Modern Steinitz Defence
1...e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.Bc6 bc6

C74 Ruy Lopez
Modern Steinitz Defence
1...e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.c3
— Any move without 5...Bd7

C75 Ruy Lopez
Modern Steinitz Defence
1...e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5...Bd7
— Any move without 6.d4
— 6...any move without 6...g6

C76 Ruy Lopez
Modern Steinitz Defence
1...e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5...Bd7 6...g6

C77 Ruy Lopez
Morphy Defence
1...e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6
— Any move without 5.O O

C78 Ruy Lopez
1...e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O O
— Any move without 5...d6, 5...Ne4, 5...Be7

C79 Ruy Lopez
Steinitz Defence Deferred
1...e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O O d6

C8
1...e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O O
— 5...Ne4
— 5...Be7 any move without 6.Re1
— 6.Re1 any move without 6...b5
— 6...b5 7.Bb3 any move without 7...d6

C80 Ruy Lopez
Open (Tarrasch) Defence
1...e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O O Ne4
— Any move without 6.d4
— 6...any move without 6...b5
— 6...b5 any move without 7.Bb3
— 7.Bb3 any move without 7...d5
— 7...d5 any move without 8.de5
— 8.de5 any move without 8...Be6
— 8...Be6 any move without 9.Qe2, 9.c3

C81 Ruy Lopez
Open, Howell Attack
1...e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O O Ne4 6...b5 7.Bb3 d5 8.de5 Be6 9.Qe2

C82 Ruy Lopez
Open Defence
1...e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O O Ne4 6...b5 7.Bb3 d5 8.de5 Be6 9.c3
— Any move without 9...Be7

C83 Ruy Lopez
Open, Classical Defence
1...e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O O Ne4 6...b5 7.Bb3 d5 8.de5 Be6 9...Be7

C84 Ruy Lopez
Closed Defence
1...e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O O Be7
— Any move without 6.Bc6, 6.Qe2, 6.Re1

C85 Ruy Lopez
Exchange Variation Doubly Deferred
1...e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O O Be7 6.Bc6

C86 Ruy Lopez
Worrall Attack
1...e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O O Be7 6.Qe2

C87 Ruy Lopez
Closed, Averbakh Variation
1...e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O O Be7 6.Re1
— Any move without 6...b5

C88 Ruy Lopez
Closed Defence
1...e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O O Be7 6.Re1 b5 7.Bb3
— Any move without 7...O O, 7...d6
— 7...O O any move without 8.c3

C89 Ruy Lopez
Marshall Counterattack
1...e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O O Be7 6.Re1 b5 7.Bb3 O O 8.c3

C9
1...e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O O Be7 6.Re1 b5 7.Bb3 d6

C90 Ruy Lopez
Closed Defence
1...e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O O Be7 6.Re1 b5 7.Bb3 d6
— Any move without 8.c3
— 8...any move without 8...O O
— 8...O O any move without 9.d4, 9.h3

C91 Ruy Lopez
Closed Defence
1...e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O O Be7 6.Re1 b5 7.Bb3 d6 8...O O 9.d4

C92 Ruy Lopez
Closed Defence
1...e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O O Be7 6.Re1 b5 7.Bb3 d6 8...O O 9.h3
— Any move without 9...h6, 9...Nb8, 9...Na5

C93 Ruy Lopez
Closed, Smyslov Defence
1...e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O O Be7 6.Re1 b5 7.Bb3 d6 8...O O 9...h6

C94 Ruy Lopez
Closed, Breyer Defence
1...e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O O Be7 6.Re1 b5 7.Bb3 d6 8...O O 9...Nb8
— Any move without 10.d4

C95 Ruy Lopez
Closed, Breyer Defence
1...e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O O Be7 6.Re1 b5 7.Bb3 d6 8...O O 9...Nb8 10.d4

C96 Ruy Lopez
Closed Defence
1...e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O O Be7 6.Re1 b5 7.Bb3 d6 8...O O 9...Na5
— Any move without 10.Bc2
— 10.Bc2 any move without 10...c5
— 10...c5 any move without 11.d4
— 11...any move without 11...Qc7

C97 Ruy Lopez
Closed, Chigorin Defence
1...e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O O Be7 6.Re1 b5 7.Bb3 d6 8...O O 9...Na5 10.Bc2 c5 11...Qc7
— Any move without 12.Nbd2
— 12.Nbd2 any move without 12...Nc6, 12...cd4

C98 Ruy Lopez
Closed, Chigorin Defence
1...e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O O Be7 6.Re1 b5 7.Bb3 d6 8...O O 9...Na5 10.Bc2 c5 11...Qc7 12.Nbd2 Nc6

C99 Ruy Lopez
Closed, Chigorin Defence
1...e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O O Be7 6.Re1 b5 7.Bb3 d6 8...O O 9...Na5 10.Bc2 c5 11...Qc7 12.Nbd2 cd4

D
1...d5
1...Nf6 2...g6 with 3...d5

D0
1...d5
— Any move without 2.c4
— 2...any move without 2...c6, 2...dc4, 2...e6

D00 Queen's Pawn Game
1...d5
— Any move without 2.Nc3, 2.Nf3, 2.c4

D01 Richter—Veresov Attack
1...d5 2.Nc3

D02 Queen's Pawn Game
1...d5 2.Nf3
— Any move without 2...Nf6
— 2...Nf6 any move without 3.Bg5, 3.e3

D03 Torre Attack
Tartakower Variation
1...d5 2.Nf3 Nf6 3.Bg5

D04 Queen's Pawn Game
1...d5 2.Nf3 Nf6 3.e3
— Any move without 3...e6

D05 Queen's Pawn Game
Zukertort Variation (including Colle system)
1...d5 2.Nf3 Nf6 3...e6

D06 Queen's Gambit Defence
1...d5 2.c4
— Any move without 2...Nc6, 2...e5, 2...c6, 2...dc4, 2...e6

D07 Queen's Gambit Defence
Chigorin Defence
1...d5 2...Nc6

D08 Queen's Gambit Defence
Albin Countergambit and Lasker Trap
1...d5 2...e5
— Any move without 3.de5
— 3.de5 any move without 3...d4
— 3...d4 any move without 4.Nf3
— 4.Nf3 any move without 4...Nc6
— 4...Nc6 any move without 5.g3

D09 Queen's Gambit Defence
Albin Countergambit
1...d5 2...e5 3.de5 d4 4.Nf3 Nc6 5.g3

D1
1...d5 2...c6

D10 Queen's Gambit Defence
Slav Defence
1...d5 2...c6
— Any move without 3.Nf3

D11 Queen's Gambit Defence
Slav Defence
1...d5 2...c6 3.Nf3
— Any move without 3...Nf6
— 3...Nf6 any move without 4.e3, 4.cd5, 4.Nc3

D12 Queen's Gambit Defence
Slav Defence
1...d5 2...c6 3.Nf3 Nf6 4.e3

D13 Queen's Gambit Defence
Slav Defence, Exchange Variation
1...d5 2...c6 3.Nf3 Nf6 4.cd5
— Any move without 4...cd5
— 4...cd5 any move without 5.Nc3
— 5.Nc3 any move without 5...Nc6
— 5...Nc6 any move without 6.Bf4
— 6.Bf4 any move without 6...Bf5

D14 Queen's Gambit Defence
Slav Defence, Exchange Variation
1...d5 2...c6 3.Nf3 Nf6 4.cd5 cd5 5.Nc3 Nc6 6.Bf4 Bf5

D15 Queen's Gambit Defence
Slav Defence
1...d5 2...c6 3.Nf3 Nf6 4.Nc3
— Any move without 4...dc4
— 4...dc4 any move without 5.a4

D16 Queen's Gambit Defence
Slav accepted, Alapin Variation
1...d5 2...c6 3.Nf3 Nf6 4.Nc3 dc4 5.a4
— Any move without 5...Bf5

D17 Queen's Gambit Defence
Slav Defence, Czech Defence
1...d5 2...c6 3.Nf3 Nf6 4.Nc3 dc4 5...Bf5
— Any move without 6.e3

D18 Queen's Gambit Defence
Dutch Variation
1...d5 2...c6 3.Nf3 Nf6 4.Nc3 dc4 5...Bf5 6.e3
— Any move without 6...e6
— 6...e6 any move without 7.Bc4
— 7.Bc4 any move without 7...Bb4
— 7...Bb4 any move without 8.O O
— 8.O O any move without 8...O O
— 8...O O any move without 9.Qe2

D19 Queen's Gambit Defence
Dutch Variation
1...d5 2...c6 3.Nf3 Nf6 4.Nc3 dc4 5...Bf5 6...e6 7.Bc4 Bb4 8.O O O O 9.Qe2

D2
1...d5 2...dc4

D20 Queen's Gambit Accepted
1...d5 2...dc4
— Any move without 3.Nf3

D21 Queen's Gambit Accepted
1...d5 2...dc4 3.Nf3
— Any move without 3...a6, 3...Nf6

D22 Queen's Gambit Accepted
Alekhine Defence
1...d5 2...dc4 3.Nf3 a6

D23 Queen's Gambit Accepted
1...d5 2...dc4 3.Nf3 Nf6
— Any move without 4.Nc3, 4.e3

D24 Queen's Gambit Accepted
1...d5 2...dc4 3.Nf3 Nf6 4.Nc3

D25 Queen's Gambit Accepted
1...d5 2...dc4 3.Nf3 Nf6 4.e3
— Any move without 4...e6

D26 Queen's Gambit Accepted
Classical Variation
1...d5 2...dc4 3.Nf3 Nf6 4...e6
— Any move without 5.Bc4
— 5.Bc4 any move without 5...c5
— 5...c5 any move without 6.O O

D27 Queen's Gambit Accepted
Classical Variation
1...d5 2...dc4 3.Nf3 Nf6 4...e6 5.Bc4 c5 6.O O
— Any move without 6...a6
— 6...a6 any move without 7.Qe2

D28 Queen's Gambit Accepted
Classical Variation
1...d5 2...dc4 3.Nf3 Nf6 4...e6 5.Bc4 c5 6.O O a6 7.Qe2
— Any move without 7...b5

D29 Queen's Gambit Accepted
Classical Variation
1...d5 2...dc4 3.Nf3 Nf6 4...e6 5.Bc4 c5 6.O O a6 7.Qe2 b5

D3
1...d5 2...e6
— Any move without 3.Nc3
— 3.Nc3 any move without 3...Nf6
— 3...Nf6 any move without 4.Nf3, 4.Bg5
— 4.Nf3 any move without 4...c5, 4...c6

D30 Queen's Gambit Declined
Orthodox Defence
1...d5 2...e6
— Any move without 3.Nc3

D31 Queen's Gambit Declined
Semi-Slav Defence
1...d5 2...e6 3.Nc3
— Any move without 3...c5, 3...Nf6

D32 Queen's Gambit Declined
Tarrasch Defence
1...d5 2...e6 3.Nc3 c5
— Any move without 4.cd5
— 4.cd5 any move without 4...ed5
— 4...ed5 any move without 5.Nf3
— 5.Nf3 any move without 5...Nc6
— 5...Nc6 any move without 6.g3

D33 Queen's Gambit Declined
Tarrasch Defence
1...d5 2...e6 3.Nc3 c5 4.cd5 ed5 5.Nf3 Nc6 6.g3
— Any move without 6...Nf6

D34 Queen's Gambit Declined
Tarrasch Defence
1...d5 2...e6 3.Nc3 c5 4.cd5 ed5 5.Nf3 Nc6 6...Nf6

D35 Queen's Gambit Declined
Exchange Variation
1...d5 2...e6 3.Nc3 Nf6
— Any move without 4.cd5, 4.Nf3, 4.Bg5
— 4.cd5 any move without 4...ed5
— 4...ed5 any move without 5.Bg5
— 5.Bg5 any move without 5...c6
— 5...c6 any move without 6.Qc2

D36 Queen's Gambit Declined
Exchange Variation
1...d5 2...e6 3.Nc3 Nf6 4.cd5 ed5 5.Bg5 c6 6.Qc2

D37 Queen's Gambit Declined
1...d5 2...e6 3.Nc3 Nf6 4.Nf3
— Any move without 4...Bb4, 4...c5, 4...c6

D38 Queen's Gambit Declined
Ragozin Variation
1...d5 2...e6 3.Nc3 Nf6 4.Nf3 Bb4
— Any move without 5.Bg5

D39 Queen's Gambit Declined
Ragozin Variation
1...d5 2...e6 3.Nc3 Nf6 4.Nf3 Bb4 5.Bg5

D4
1...d5 2...e6 3.Nc3 Nf6 4.Nf3
— 4...c5
— 4...c6

D40 Queen's Gambit Declined
Semi-Tarrasch Defence
1...d5 2...e6 3.Nc3 Nf6 4.Nf3 c5
— Any move without 5.cd5

D41 Queen's Gambit Declined
Semi-Tarrasch Defence
1...d5 2...e6 3.Nc3 Nf6 4.Nf3 c5 5.cd5
— Any move without 5...Nd5
— 5...Nd5 any move without 6.e3

D42 Queen's Gambit Declined
Semi-Tarrasch Defence
1...d5 2...e6 3.Nc3 Nf6 4.Nf3 c5 5.cd5 Nd5 6.e3

D43 Queen's Gambit Declined
Semi-Slav Defence
1...d5 2...e6 3.Nc3 Nf6 4.Nf3 c6
— Any move without 5.Bg5, 5.e3
— 5.Bg5 any move without 5...dc4

D44 Queen's Gambit Declined
Semi-Slav Defence
1...d5 2...e6 3.Nc3 Nf6 4.Nf3 c6 5.Bg5 dc4

D45 Queen's Gambit Declined
Semi-Slav Defence
1...d5 2...e6 3.Nc3 Nf6 4.Nf3 c6 5.e3
— Any move without 5...Nbd7
— 5...Nbd7 any move without 6.Bd3

D46 Queen's Gambit Declined
Semi-Slav Defence
1...d5 2...e6 3.Nc3 Nf6 4.Nf3 c6 5...Nbd7 6.Bd3
— Any move without 6...dc4

D47 Queen's Gambit Declined
Semi-Slav Defence
1...d5 2...e6 3.Nc3 Nf6 4.Nf3 c6 5...Nbd7 6.Bd3 dc4 7.Bc4
— Any move without 7...b5
— 7...b5 any move without 8.Bd3
— 8.Bd3 any move without 8...a6

D48 Queen's Gambit Declined
Meran Defence
1...d5 2...e6 3.Nc3 Nf6 4.Nf3 c6 5...Nbd7 6.Bd3 dc4 7.Bc4 b5 8.Bd3 a6
— Any move without 9.e4
— 9...any move without 9...c5
— 9...c5 any move without 10.e5

D49 Queen's Gambit Declined
Meran Defence
1...d5 2...e6 3.Nc3 Nf6 4.Nf3 c6 5...Nbd7 6.Bd3 dc4 7.Bc4 b5 8.Bd3 a6 9...c5 10.e5

D5
1...d5 2...e6 3.Nc3 Nf6 4.Bg5
— Any move without 4...Be7
— 4...Be7 any move without 5.e3
— 5...any move without 5...O O
— 5...O O any move without 6.Nf3
— 6.Nf3 any move without 6...Nbd7

D50 Queen's Gambit Declined
1...d5 2...e6 3.Nc3 Nf6 4.Bg5
— Any move without 4...Nbd7, 4...Be7

D51 Queen's Gambit Declined
Cambridge Springs Defence
1...d5 2...e6 3.Nc3 Nf6 4.Bg5 Nbd7
— Any move without 5.e3
— 5...any move without 5...c6
— 5...c6 any move without 6.Nf3

D52 Queen's Gambit Declined
Cambridge Springs Defence
1...d5 2...e6 3.Nc3 Nf6 4.Bg5 Nbd7 5...c6 6.Nf3

D53 Queen's Gambit Declined
Orthodox Defence
1...d5 2...e6 3.Nc3 Nf6 4.Bg5 Be7
— Any move without 5.e3

D54 Queen's Gambit Declined
Orthodox Defence
1...d5 2...e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3
— Any move without 5...O O
— 5...O O any move without 6.Nf3

D55 Queen's Gambit Declined
Anti-Tartakower System
1...d5 2...e6 3.Nc3 Nf6 4.Bg5 Be7 5...O O 6.Nf3
— Any move without 6...h6, 6...Nbd7
— 6...h6 any move without 7.Bh4

D56 Queen's Gambit Declined
Lasker System
1...d5 2...e6 3.Nc3 Nf6 4.Bg5 Be7 5...O O 6.Nf3 h6 7.Bh4
— Any move without 7...Ne4, 7...b6
— 7...Ne4 any move without 8.Be7
— 8.Be7 any move without 8...Qe7
— 8...Qe7 any move without 9.cd5

D57 Queen's Gambit Declined
Lasker System
1...d5 2...e6 3.Nc3 Nf6 4.Bg5 Be7 5...O O 6.Nf3 h6 7.Bh4 Ne4
8.Be7 Qe7 9.cd5

D58 Queen's Gambit Declined
Tartakower System
1...d5 2...e6 3.Nc3 Nf6 4.Bg5 Be7 5...O O 6.Nf3 h6 7.Bh4 b6
— Any move without 8.cd5

D59 Queen's Gambit Declined
Tartakower System
1...d5 2...e6 3.Nc3 Nf6 4.Bg5 Be7 5...O O 6.Nf3 h6 7.Bh4 b6 8.cd5

D6
1...d5 2...e6 3.Nc3 Nf6 4.Bg5 Be7 5...O O 6.Nf3 Nbd7

D60 Queen's Gambit Declined
Orthodox Defence
1...d5 2...e6 3.Nc3 Nf6 4.Bg5 Be7 5...O O 6.Nf3 Nbd7
— Any move without 7.Qc2, 7.Rc1

D61 Queen's Gambit Declined
Orthodox Defence
1...d5 2...e6 3.Nc3 Nf6 4.Bg5 Be7 5...O O 6.Nf3 Nbd7 7.Qc2
— Any move without 7...c5
— 7...c5 any move without 8.cd5

D62 Queen's Gambit Declined
Orthodox Defence
1...d5 2...e6 3.Nc3 Nf6 4.Bg5 Be7 5...O O 6.Nf3 Nbd7 7.Qc2 c5 8.cd5

D63 Queen's Gambit Declined
Orthodox Defence
1...d5 2...e6 3.Nc3 Nf6 4.Bg5 Be7 5...O O 6.Nf3 Nbd7 7.Rc1
— Any move without 7...c6

D64 Queen's Gambit Declined
Orthodox Defence
1...d5 2...e6 3.Nc3 Nf6 4.Bg5 Be7 5...O O 6.Nf3 Nbd7 7.Rc1 c6
— Any move without 8.Qc2, 8.Bd3
— 8.Qc2 any move without 8...a6
— 8...a6 any move without 9.cd5

D65 Queen's Gambit Declined
Orthodox Defence
1...d5 2...e6 3.Nc3 Nf6 4.Bg5 Be7 5...O O 6.Nf3 Nbd7 7.Rc1 c6 8.Qc2 a6 9.cd5

D66 Queen's Gambit Declined
Orthodox Defence
1...d5 2...e6 3.Nc3 Nf6 4.Bg5 Be7 5...O O 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3
— Any move without 8...dc4
— 8...dc4 any move without 9.Bc4
— 9.Bc4 any move without 9...Nd5

D67 Queen's Gambit Declined
Orthodox Defence
1...d5 2...e6 3.Nc3 Nf6 4.Bg5 Be7 5...O O 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 dc4 9.Bc4 Nd5
— Any move without 10.Be7
— 10.Be7 any move without 10...Qe7
— 10...Qe7 any move without 11.O O

D68 Queen's Gambit Declined
Orthodox Defence
1...d5 2...e6 3.Nc3 Nf6 4.Bg5 Be7 5...O O 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 dc4 9.Bc4 Nd5 10.Be7 Qe7 11.O O
— Any move without 11...Nc3
— 11...Nc3 any move without 12.Rc3
— 12.Rc3 any move without 12...e5
— 12...e5 any move without 13.de5

D69 Queen's Gambit Declined
Orthodox Defence
1...d5 2...e6 3.Nc3 Nf6 4.Bg5 Be7 5...O O 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 dc4 9.Bc4 Nd5 10.Be7 Qe7 11.O O Nc3 12.Rc3 e5 13.de5

D7
1...Nf6 2...g6 (with 3...d5)
— Any move without 3.Nc3

D70 Neo-Grünfeld Defence
1...Nf6 2...g6 (with 3...d5)
— Any move without 3.g3, 3.Nc3

D71 Neo-Grünfeld Defence
1...Nf6 2...g6 3...d5
— Any move without 4.Bg2
— 4.Bg2 any move without 4...Bg7
— 4...Bg7 any move without 5.cd5, 5.Nf3
— 5.cd5 any move without 5...Nd5
— 5...Nd5 any move without 6.e4

D72 Neo-Grünfeld Defence
1...Nf6 2...g6 3...d5 4.Bg2 Bg7 5.cd5 Nd5 6.e4

D73 Neo-Grünfeld Defence
1...Nf6 2...g6 3...d5 4.Bg2 Bg7 5.Nf3
— Any move without 5...O O

D74 Neo-Grünfeld Defence
1...Nf6 2...g6 3...d5 4.Bg2 Bg7 5.Nf3 O O
— Any move without 6.cd5, 6.O O
— 6.cd5 any move without 6...Nd5
— 6...Nd5 any move without 7.O O
— 7.O O any move without 7...c5, 7...Nb6

D75 Neo-Grünfeld Defence
1...Nf6 2...g6 3...d5 4.Bg2 Bg7 5.Nf3 O O 6.cd5 Nd5 7.O O c5

D76 Neo-Grünfeld Defence
1...Nf6 2...g6 3...d5 4.Bg2 Bg7 5.Nf3 O O 6.cd5 Nd5 7.O O Nb6

D77 Neo-Grünfeld Defence
1...Nf6 2...g6 3...d5 4.Bg2 Bg7 5.Nf3 O O 6.O O
— Any move without 6...c6

D78 Neo-Grünfeld Defence
1...Nf6 2...g6 3...d5 4.Bg2 Bg7 5.Nf3 O O 6.O O c6
— Any move without 7.cd5

D79 Neo-Grünfeld Defence
1...Nf6 2...g6 3...d5 4.Bg2 Bg7 5.Nf3 O O 6.O O c6 7.cd5

D8
1...Nf6 2...g6 3.Nc3 d5
— Any move without 4.Nf3

D80 Grünfeld Defence
1...Nf6 2...g6 3.Nc3 d5
— Any move without 4.Qb3, 4.Bf4, 4.cd5, 4.Nf3

D81 Grünfeld Defence
Russian Variation
1...Nf6 2...g6 3.Nc3 d5 4.Qb3

D82 Grünfeld Defence
1...Nf6 2...g6 3.Nc3 d5 4.Bf4
— Any move without 4...Bg7
— 4...Bg7 any move without 5.e3
— 5...any move without 5...O O

D83 Grünfeld Defence
1...Nf6 2...g6 3.Nc3 d5 4.Bf4 Bg7 5...O O
— Any move without 6.cd5

D84 Grünfeld Defence
1...Nf6 2...g6 3.Nc3 d5 4.Bf4 Bg7 5...O O 6.cd5

D85 Grünfeld Defence
1...Nf6 2...g6 3.Nc3 d5 4.cd5
— Any move without 4...Nd5
— 4...Nd5 any move without 5.e4
— 5...any move without 5...Nc3
— 5...Nc3 6.bc3 any move without 6...Bg7
— 6...Bg7 any move without 7.Bc4

D86 Grünfeld Defence
Exchange, Classical Variation
1...Nf6 2...g6 3.Nc3 d5 4.cd5 Nd5 5...Nc3 6.bc3 Bg7 7.Bc4
— Any move without 7...O O
— 7...O O any move without 8.Ne2
— 8.Ne2 any move without 8...c5

D87 Grünfeld Defence
Exchange, Spassky Variation
1...Nf6 2...g6 3.Nc3 d5 4.cd5 Nd5 5...Nc3 6.bc3 Bg7 7.Bc4 O O 8.Ne2 c5
— Any move without 9.O O
— 9.O O any move without 9...Nc6
— 9...Nc6 any move without 10.Be3
— 10.Be3 any move without 10...cd4

D88 Grünfeld Defence
Spassky Variation
1...Nf6 2...g6 3.Nc3 d5 4.cd5 Nd5 5...Nc3 6.bc3 Bg7 7.Bc4 O O 8.Ne2 c5 9.O O Nc6 10.Be3 cd4
— Any move without 11.cd4
— 11.cd4 any move without 11...Bg4
— 11...Bg4 any move without 12.f3
— 12...any move without 12...Na5
— 12...Na5 any move without 13.Bd3

D89 Grünfeld Defence
Spassky Variation
1...Nf6 2...g6 3.Nc3 d5 4.cd5 Nd5 5...Nc3 6.bc3 Bg7 7.Bc4 O O 8.Ne2 c5 9.O O Nc6 10.Be3 cd4 11.cd4 Bg4 12...Na5 13.Bd3

D9
1...Nf6 2...g6 3.Nc3 d5 4.Nf3

D90 Grünfeld Defence
Three Knights Variation
1...Nf6 2...g6 3.Nc3 d5 4.Nf3
— Any move without 4...Bg7
— 4...Bg7 any move without 5.Bg5, 5.Bf4, 5.e3, 5.Qb3

D91 Grünfeld Defence
Three Knights Variation
1...Nf6 2...g6 3.Nc3 d5 4.Nf3 Bg7 5.Bg5

D92 Grünfeld Defence
1...Nf6 2...g6 3.Nc3 d5 4.Nf3 Bg7 5.Bf4
— Any move without 5...O O
— 5...O O any move without 6.e3

D93 Grünfeld Defence
1...Nf6 2...g6 3.Nc3 d5 4.Nf3 Bg7 5.Bf4 O O 6.e3

D94 Grünfeld Defence
1...Nf6 2...g6 3.Nc3 d5 4.Nf3 Bg7 5.e3
— Any move without 5...O O
— 5...O O any move without 6.Qb3

D95 Grünfeld Defence
1...Nf6 2...g6 3.Nc3 d5 4.Nf3 Bg7 5...O O 6.Qb3

D96 Grünfeld Defence
Russian Variation
1...Nf6 2...g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3
— Any move without 5...dc4

D97 Grünfeld Defence
Russian Variation
1...Nf6 2...g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dc4
— Any move without 6.Qc4
— 6.Qc4 any move without 6...O O
— 6...O O any move without 7.e4
— 7...any move without 7...Bg4

D98 Grünfeld Defence
Russian, Smyslov Variation
1...Nf6 2...g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dc4 6.Qc4 O O 7...Bg4
— Any move without 8.Be3
— 8.Be3 any move without 8...Nfd7
— 8...Nfd7 any move without 9.Qb3

D99 Grünfeld Defence
Smyslov Variation
1...Nf6 2...g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dc4 6.Qc4 O O 7...Bg4 8.Be3 Nfd7 9.Qb3

E
1...Nf6 2...e6
1...Nf6 2...g6 without 3...d5

E0
1...Nf6 2...e6
— Any move without 3.Nf3, 3.Nc3

E00 Catalan Opening
1...Nf6 2...e6
— Any move without 3.g3, 3.Nf3, 3.Nc3
— 3...any move without 3...d5

E01 Catalan Opening
1...Nf6 2...e6 3...d5
— Any move without 4.Bg2
— 4.Bg2 any move without 4...dc4, 4...Be7

E02 Catalan Opening
1...Nf6 2...e6 3...d5 4.Bg2 dc4
— Any move without 5.Qa4, 5.Nf3
— 5.Qa4 any move without 5...Nbd7
— 5...Nbd7 any move without 6.Qc4

E03 Catalan Opening
1...Nf6 2...e6 3...d5 4.Bg2 dc4 5.Qa4 Nbd7 6.Qc4

E04 Catalan Opening
Open Variation
1...Nf6 2...e6 3...d5 4.Bg2 dc4 5.Nf3
— Any move without 5...Be7

E05 Catalan Opening
Open Variation
1...Nf6 2...e6 3...d5 4.Bg2 dc4 5.Nf3 Be7

E06 Catalan Opening
Closed Variation
1...Nf6 2...e6 3...d5 4.Bg2 Be7
— Any move without 5.Nf3
— 5.Nf3 any move without 5...O O
— 5...O O any move without 6.O O
— 6.O O any move without 6...Nbd7

E07 Catalan Opening
Closed Variation
1...Nf6 2...e6 3...d5 4.Bg2 Be7 5.Nf3 O O 6.O O Nbd7
— Any move without 7.Qc2

E08 Catalan Opening
Closed Variation
1...Nf6 2...e6 3...d5 4.Bg2 Be7 5.Nf3 O O 6.O O Nbd7 7.Qc2
— Any move without 7...c6
— 7...c6 any move without 8.Nbd2

E09 Catalan Opening
Closed Variation
1...Nf6 2...e6 3...d5 4.Bg2 Be7 5.Nf3 O O 6.O O Nbd7 7.Qc2 c6 8.Nbd2

E1
1...Nf6 2...e6 3.Nf3

E10 Blumenfeld Gambit
1...Nf6 2...e6 3.Nf3
— Any move without 3...Bb4, 3...b6

E11 Bogo-Indian Defence
1...Nf6 2...e6 3.Nf3 Bb4

E12 Queen's Indian Defence
1...Nf6 2...e6 3.Nf3 b6
— Any move without 4.Nc3, 4.e3, 4.g3
— 4.Nc3 any move without 4...Bb7
— 4...Bb7 any move without 5.Bg5

E13 Queen's Indian Defence
1...Nf6 2...e6 3.Nf3 b6 4.Nc3 Bb7 5.Bg5

E14 Queen's Indian Defence
1...Nf6 2...e6 3.Nf3 b6 4.e3

E15 Queen's Indian Defence
1...Nf6 2...e6 3.Nf3 b6 4.g3
— Any move without 4...Bb7

E16 Queen's Indian Defence
Capablanca Variation
1...Nf6 2...e6 3.Nf3 b6 4...Bb7
— Any move without 5.Bg2
— 5.Bg2 any move without 5...Be7

E17 Queen's Indian Defence
1...Nf6 2...e6 3.Nf3 b6 4...Bb7 5.Bg2 Be7
— Any move without 6.O O
— 6.O O any move without 6...O O
— 6...O O any move without 7.Nc3

E18 Queen's Indian Defence
1...Nf6 2...e6 3.Nf3 b6 4...Bb7 5.Bg2 Be7 6.O O O O 7.Nc3
— Any move without 7...Ne4
— 7...Ne4 any move without 8.Qc2

E19 Queen's Indian Defence
1...Nf6 2...e6 3.Nf3 b6 4...Bb7 5.Bg2 Be7 6.O O O O 7.Nc3 Ne4 8.Qc2

E2
1...Nf6 2...e6 3.Nc3
— Any move without 3...d5, 3...Bb4
— 3...Bb4 any move without 4.Bg5, 4.Qc2, 4.e3

E20 Nimzo-Indian Defence
1...Nf6 2...e6 3.Nc3
— Any move without 3...d5, 3...Bb4
— 3...Bb4 any move without 4.Nf3, 4.Qb3, 4.a3, 4.Bg5, 4.Qc2, 4.e3

E21 Nimzo-Indian Defence
Three Knights Variation
1...Nf6 2...e6 3.Nc3 Bb4 4.Nf3

E22 Nimzo-Indian Defence
Spielmann Variation
1...Nf6 2...e6 3.Nc3 Bb4 4.Qb3
— Any move without 4...c5

E23 Nimzo-Indian Defence
Spielmann Variation
1...Nf6 2...e6 3.Nc3 Bb4 4.Qb3 c5

E24 Nimzo-Indian Defence
Sämisch Variation
1...Nf6 2...e6 3.Nc3 Bb4 4.a3
— Any move without 4...Bc3
— 4...Bc3 5.bc3 any move without 5...c5, 5...O O

E25 Nimzo-Indian Defence
Sämisch Variation
1...Nf6 2...e6 3.Nc3 Bb4 4...Bc3 5.bc3 c5
— Any move without 6.e3

E26 Nimzo-Indian Defence
Sämisch Variation
1...Nf6 2...e6 3.Nc3 Bb4 4...Bc3 5.bc3 c5 6.e3

E27 Nimzo-Indian Defence
Sämisch Variation
1...Nf6 2...e6 3.Nc3 Bb4 4...Bc3 5.bc3 O O
— Any move without 6.e3

E28 Nimzo-Indian Defence
Sämisch Variation
1...Nf6 2...e6 3.Nc3 Bb4 4...Bc3 5.bc3 O O 6.e3
— Any move without 6...c5

E29 Nimzo-Indian Defence
Sämisch Variation
1...Nf6 2...e6 3.Nc3 Bb4 4...Bc3 5.bc3 O O 6...c5

E3
1...Nf6 2...e6 3.Nc3 Bb4
— 4.Bg5
— 4.Qc2

E30 Nimzo-Indian Defence
Leningrad Variation
1...Nf6 2...e6 3.Nc3 Bb4 4.Bg5
— Any move without 4...h6
— 4...h6 any move without 5.Bh4
— 5.Bh4 any move without 5...c5
— 5...c5 any move without 6.d5
— 6...any move without 6...d6

E31 Nimzo-Indian Defence
Leningrad Variation
1...Nf6 2...e6 3.Nc3 Bb4 4.Bg5 h6 5.Bh4 c5 6...d6

E32 Nimzo-Indian Defence
Classical Variation
1...Nf6 2...e6 3.Nc3 Bb4 4.Qc2
— Any move without 4...Nc6, 4...d5, 4...c5

E33 Nimzo-Indian Defence
Classical Variation
1...Nf6 2...e6 3.Nc3 Bb4 4.Qc2 Nc6

E34 Nimzo-Indian Defence
Classical Variation
1...Nf6 2...e6 3.Nc3 Bb4 4.Qc2 d5
— Any move without 5.cd5, 5.a3
— 5.cd5 any move without 5...ed5

E35 Nimzo-Indian Defence
Classical Variation
1...Nf6 2...e6 3.Nc3 Bb4 4.Qc2 d5 5.cd5 ed5

E36 Nimzo-Indian Defence
Classical Variation
1...Nf6 2...e6 3.Nc3 Bb4 4.Qc2 d5 5.a3
— Any move without 5...Bc3
— 5...Bc3 any move without 6.Qc3
— 6.Qc3 any move without 6...Ne4

E37 Nimzo-Indian Defence
Classical Variation
1...Nf6 2...e6 3.Nc3 Bb4 4.Qc2 d5 5...Bc3 6.Qc3 Ne4

E38 Nimzo-Indian Defence
Classical Variation
1...Nf6 2...e6 3.Nc3 Bb4 4.Qc2 c5
— Any move without 5.dc5
— 5.dc5 any move without 5...O O

E39 Nimzo-Indian Defence
Classical Variation
1...Nf6 2...e6 3.Nc3 Bb4 4.Qc2 c5 5.dc5 O O

E4
1...Nf6 2...e6 3.Nc3 Bb4 4.e3
— Any move without 4...O O
— 4...O O any move without 5.Nf3

E40 Nimzo-Indian Defence
Rubinstein Variation
1...Nf6 2...e6 3.Nc3 Bb4 4.e3
— Any move without 4...c5, 4...b6, 4...O O

E41 Nimzo-Indian Defence
Rubinstein Variation
1...Nf6 2...e6 3.Nc3 Bb4 4...c5
— Any move without 5.Ne2

E42 Nimzo-Indian Defence
Rubinstein Variation
1...Nf6 2...e6 3.Nc3 Bb4 4...c5 5.Ne2

E43 Nimzo-Indian Defence
Rubinstein Variation
1...Nf6 2...e6 3.Nc3 Bb4 4...b6
— Any move without 5.Ne2

E44 Nimzo-Indian Defence
Rubinstein Variation
1...Nf6 2...e6 3.Nc3 Bb4 4...b6 5.Ne2
— Any move without 5...Ba6

E45 Nimzo-Indian Defence
Rubinstein Variation
1...Nf6 2...e6 3.Nc3 Bb4 4...b6 5.Ne2 Ba6

E46 Nimzo-Indian Defence
Rubinstein Variation
1...Nf6 2...e6 3.Nc3 Bb4 4...O O
— Any move without 5.Bd3, 5.Nf3

E47 Nimzo-Indian Defence
Rubinstein Variation
1...Nf6 2...e6 3.Nc3 Bb4 4...O O 5.Bd3
— Any move without 5...d5

E48 Nimzo-Indian Defence
Rubinstein Variation
1...Nf6 2...e6 3.Nc3 Bb4 4...O O 5.Bd3 d5
— Any move without 6.a3

E49 Nimzo-Indian Defence
Rubinstein Variation
1...Nf6 2...e6 3.Nc3 Bb4 4...O O 5.Bd3 d5 6.a3

E5
1...Nf6 2...e6 3.Nc3 Bb4 4...O O 5.Nf3

E50 Nimzo-Indian Defence
Rubinstein Variation
1...Nf6 2...e6 3.Nc3 Bb4 4...O O 5.Nf3
— Any move without 5...d5

E51 Nimzo-Indian Defence
Rubinstein Variation
1...Nf6 2...e6 3.Nc3 Bb4 4...O O 5.Nf3 d5
— Any move without 6.Bd3
— 6.Bd3 any move without 6...b6, 6...c5

E52 Nimzo-Indian Defence
Rubinstein Variation
1...Nf6 2...e6 3.Nc3 Bb4 4...O O 5.Nf3 d5 6.Bd3 b6

E53 Nimzo-Indian Defence
Rubinstein Variation
1...Nf6 2...e6 3.Nc3 Bb4 4...O O 5.Nf3 d5 6.Bd3 c5
— Any move without 7.O O
— 7.O O any move without 7...dc4, 7...Nc6

E54 Nimzo-Indian Defence
Rubinstein Variation
1...Nf6 2...e6 3.Nc3 Bb4 4...O O 5.Nf3 d5 6.Bd3 c5 7.O O dc4 8.Bc4
— Any move without 8...Nbd7

E55 Nimzo-Indian Defence
Rubinstein Variation
1...Nf6 2...e6 3.Nc3 Bb4 4...O O 5.Nf3 d5 6.Bd3 c5 7.O O dc4 8.Bc4 Nbd7

E56 Nimzo-Indian Defence
Rubinstein Variation
1...Nf6 2...e6 3.Nc3 Bb4 4...O O 5.Nf3 d5 6.Bd3 c5 7.O O Nc6
— Any move without 8.a3
— 8...any move without 8...dc4, 8...Bc3
— 8...dc4 any move without 9.Bc4
— 9.Bc4 any move without 9...cd4

E57 Nimzo-Indian Defence
Rubinstein Variation
1...Nf6 2...e6 3.Nc3 Bb4 4...O O 5.Nf3 d5 6.Bb3 c5 7.O O Nc6 8...dc4 9.Bc4 cd4

E58 Nimzo-Indian Defence
Rubinstein Variation
1...Nf6 2...e6 3.Nc3 Bb4 4...O O 5.Nf3 d5 6.Bd3 c5 7.O O Nc6 8...Bc3 9.bc3
— Any move without 9...dc4

E59 Nimzo-Indian Defence
Rubinstein Variation
1...Nf6 2...e6 3.Nc3 Bb4 4...O O 5.Nf3 d5 6.Bd3 c5 7.O O Nc6 8...Bc3 9.bc3 dc4 10.Bc4

E6
1...Nf6 2...g6 (without 3...d5)
— Any move without 3.Nc3
— 3.Nc3 any move without 3...d5, 3...Bg7
— 3...Bg7 any move without 4.e4

E60 King's Indian Defence
1...Nf6 2...g6
— Any move without 3.Nc3

E61 King's Indian Defence
1...Nf6 2...g6 3.Nc3
— Any move without 3...d5, 3...Bg7
— 3...Bg7 any move without 4.Nf3, 4.e4
— 4.Nf3 any move without 4...O O
— 4...O O any move without 5.g3

E62 King's Indian Defence
Fianchetto Variation
1...Nf6 2...g6 3.Nc3 Bg7 4.Nf3 O O 5.g3
— Any move without 5...d6
— 5...d6 any move without 6.Bg2
— 6.Bg2 any move without 6...Nc6, 6...c5, 6...Nbd7

E63 King's Indian Defence
Fianchetto Variation
1...Nf6 2...g6 3.Nc3 Bg7 4.Nf3 O O 5...d6 6.Bg2 Nc6

E64 King's Indian Defence
Fianchetto Variation
1...Nf6 2...g6 3.Nc3 Bg7 4.Nf3 O O 5...d6 6.Bg2 c5
— Any move without 7.O O

E65 King's Indian Defence
Fianchetto Variation
1...Nf6 2...g6 3.Nc3 Bg7 4.Nf3 O O 5...d6 6.Bg2 c5 7.O O
— Any move without 7...Nc6
— 7...Nc6 any move without 8.d5

E66 King's Indian Defence
Fianchetto Variation
1...Nf6 2...g6 3.Nc3 Bg7 4.Nf3 O O 5...d6 6.Bg2 c5 7.O O Nc6 8.d5

E67 King's Indian Defence
Fianchetto Variation
1...Nf6 2...g6 3.Nc3 Bg7 4.Nf3 O O 5...d6 6.Bg2 Nbd7
— Any move without 7.O O
— 7.O O any move without 7...e5
— 7...e5 any move without 8.e4

E68 King's Indian Defence
Fianchetto Variation
1...Nf6 2...g6 3.Nc3 Bg7 4.Nf3 O O 5...d6 6.Bg2 Nbd7 7.O O e5 8.e4
— Any move without 8...c6
— 8...c6 any move without 9.h3

E69 King's Indian Defence
Fianchetto Variation
1...Nf6 2...g6 3.Nc3 Bg7 4.Nf3 O O 5...d6 6.Bg2 Nbd7 7.O O e5 8...c6 9.h3

E7
1...Nf6 2...g6 3.Nc3 Bg7 4.e4
— Any move without 4...d6
— 4...d6 any move without 5.f3, 5.Nf3

E70 King's Indian Defence
1...Nf6 2...g6 3.Nc3 Bg7 4.e4
— Any move without 4...d6
— 4...d6 any move without 5.h3, 5.g3, 5.Be2, 5.f4, 5.f3, 5.Nf3

E71 King's Indian Defence
1...Nf6 2...g6 3.Nc3 Bg7 4...d6 5.h3

E72 King's Indian Defence
1...Nf6 2...g6 3.Nc3 Bg7 4...d6 5.g3

E73 King's Indian Defence
1...Nf6 2...g6 3.Nc3 Bg7 4...d6 5.Be2
— Any move without 5...O O
— 5...O O any move without 6.Bg5
— 6.Bg5 any move without 6...c5

E74 King's Indian Defence
1...Nf6 2...g6 3.Nc3 Bg7 4...d6 5.Be2 O O 6.Bg5 c5
— Any move without 7.d5
— 7...any move without 7...e6

E75 King's Indian Defence
1...Nf6 2...g6 3.Nc3 Bg7 4...d6 5.Be2 O O 6.Bg5 c5 7...e6

E76 King's Indian Defence
Four Pawns Attack
1...Nf6 2...g6 3.Nc3 Bg7 4...d6 5.f4
— Any move without 5...O O
— 5...O O any move without 6.Be2

E77 King's Indian Defence
Four Pawns Attack
1...Nf6 2...g6 3.Nc3 Bg7 4...d6 5...O O 6.Be2
— Any move without 6...c5
— 6...c5 any move without 7.Nf3

E78 King's Indian Defence
Four Pawns Attack
1...Nf6 2...g6 3.Nc3 Bg7 4...d6 5...O O 6.Be2 c5 7.Nf3
— Any move without 7...cd4
— 7...cd4 any move without 8.Nd4
— 8.Nd4 any move without 8...Nc6

E79 King's Indian Defence
Four Pawns Attack
1...Nf6 2...g6 3.Nc3 Bg7 4...d6 5...O O 6.Be2 c5 7.Nf3 cd4 8.Nd4 Nc6

E8
1...Nf6 2...g6 3.Nc3 Bg7 4...d6 5.f3

E80 King's Indian Defence
Sämisch Variation
1...Nf6 2...g6 3.Nc3 Bg7 4...d6 5.f3
— Any move without 5...O O

E81 King's Indian Defence
Sämisch Variation
1...Nf6 2...g6 3.Nc3 Bg7 4...d6 5...O O
— Any move without 6.Be3
— 6.Be3 any move without 6...b6, 6...Nc6, 6...e5

E82 King's Indian Defence
Sämisch Variation
1...Nf6 2...g6 3.Nc3 Bg7 4...d6 5...O O 6.Be3 b6

E83 King's Indian Defence
Sämisch Variation
1...Nf6 2...g6 3.Nc3 Bg7 4...d6 5...O O 6.Be3 Nc6
— Any move without 7.Nge2
— 7.Nge2 any move without 7...a6
— 7...a6 any move without 8.Qd2
— 8.Qd2 any move without 8...Rb8

E84 King's Indian Defence
Sämisch Variation
1...Nf6 2...g6 3.Nc3 Bg7 4...d6 5...O O 6.Be3 Nc6 7.Nge2 a6 8.Qd2 Rb8

E85 King's Indian Defence
Sämisch Variation
1...Nf6 2...g6 3.Nc3 Bg7 4...d6 5...O O 6.Be3 e5
— Any move without 7.Nge2, 7.d5
— 7.Nge2 any move without 7...c6

E86 King's Indian Defence
Sämisch Variation
1...Nf6 2...g6 3.Nc3 Bg7 4...d6 5...O O 6.Be3 e5 7.Nge2 c6

E87 King's Indian Defence
Sämisch Variation
1...Nf6 2...g6 3.Nc3 Bg7 4...d6 5...O O 6.Be3 e5 7.d5
— Any move without 7...c6

E88 King's Indian Defence
Sämisch Variation
1...Nf6 2...g6 3.Nc3 Bg7 4...d6 5...O O 6.Be3 e5 7...c6
— Any move without 8.Nge2

E89 King's Indian Defence
Sämisch Variation
1...Nf6 2...g6 3.Nc3 Bg7 4...d6 5...O O 6.Be3 e5 7...c6 8.Nge2

E9
1...Nf6 2...g6 3.Nc3 Bg7 4...d6 5.Nf3

E90 King's Indian Defence
1...Nf6 2...g6 3.Nc3 Bg7 4...d6 5.Nf3
— Any move without 5...O O
— 5...O O any move without 6.Be2

E91 King's Indian Defence
1...Nf6 2...g6 3.Nc3 Bg7 4...d6 5.Nf3 O O 6.Be2
— Any move without 6...e5

E92 King's Indian Defence
Classical Variation
1...Nf6 2...g6 3.Nc3 Bg7 4...d6 5.Nf3 O O 6.Be2 e5
— Any move without 7.d5, 7.O O
— 7...any move without 7...Nbd7

E93 King's Indian Defence
Petrosian System
1...Nf6 2...g6 3.Nc3 Bg7 4...d6 5.Nf3 O O 6.Be2 e5 7...Nbd7

E94 King's Indian Defence
Orthodox Variation
1...Nf6 2...g6 3.Nc3 Bg7 4...d6 5.Nf3 O O 6.Be2 e5 7.O O
— Any move without 7...Nbd7, 7...Nc6

E95 King's Indian Defence
Orthodox Variation
1...Nf6 2...g6 3.Nc3 Bg7 4...d6 5.Nf3 O O 6.Be2 e5 7.O O Nbd7
— Any move without 8.Re1

E96 King's Indian Defence
Orthodox Variation
1...Nf6 2...g6 3.Nc3 Bg7 4...d6 5.Nf3 O O 6.Be2 e5 7.O O Nbd7 8.Re1

E97 King's Indian Defence
Orthodox Variation
1...Nf6 2...g6 3.Nc3 Bg7 4...d6 5.Nf3 O O 6.Be2 e5 7.O O Nc6
— Any move without 8.d5
— 8...any move without 8...Ne7
— 8...Ne7 any move without 9.Ne1

E98 King's Indian Defence
Orthodox Variation
1...Nf6 2...g6 3.Nc3 Bg7 4...d6 5.Nf3 O O 6.Be2 e5 7.O O Nc6 8...Ne7 9.Ne1
— Any move without 9...Nd7
— 9...Nd7 any move without 10.f3

E99 King's Indian Defence
Orthodox Variation
1...Nf6 2...g6 3.Nc3 Bg7 4...d6 5.Nf3 O O 6.Be2 e5 7.O O Nc6 8...Ne7 9.Ne1 Nd7 10.f3