ECO Code
A
Various without 1. d4, 1. e4
1. d4 Various without 1... d5, 1... Nf6
1. d4 Nf6 Various without 2. c4
1. d4 Nf6 2. c4 Various without 2... e6, 2... g6
A0
– Various without 1. c4, 1. d4, 1. e4
A00
Irregular Openings
– Various 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
– Various without 1... d5
A03
Bird's Opening
1. f4 d5
A04
Réti Opening
1. Nf3
– Various without 1... Nf6, 1... d5
A05
Réti Opening
1. Nf3 Nf6
A06
Réti Opening
1. Nf3 d5
– Various without 2. g3, 2. c4
A07
Réti Opening
King's Indian Attack
1. Nf3 d5 2. g3
– Various without 2... c5
A08
Réti Opening
King's Indian Attack
1. Nf3 d5 2. g3 c5
A09
Réti Opening
1. Nf3 d5 2. c4
A1
1. c4
– Various without 1... e5, 1... c5
A10
English Opening
1. c4
– Various without 1... c6, 1... e6, 1... Nf6, 1... e5, 1... c5
A11
English Opening
Caro–Kann defensive system
1. c4 c6
– Various without 2. Nf3
– 2. Nf3 Various without 2... d5
– 2... d5 Various without 3. b3
A12
English Opening
Caro–Kann defensive system
1. c4 c6 2. Nf3 d5 3. b3
A13
English Opening
1. c4 e6
– Various without 2. Nf3
– 2. Nf3 Various without 2... d5
– 2... d5 Various without 3. g3
– 3. g3 Various without 3... Nf6
– 3... Nf6 Various without 4. Bg2
– 4. Bg2 Various without 4... Be7
A14
English Opening
Neo-Catalan declined
1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Be7
A15
English Opening
1. c4 Nf6
– Various without 2. Nc3
A16
English Opening
1. c4 Nf6 2. Nc3
– Various without 2... e6
A17
English Opening
Hedgehog Defence
1. c4 Nf6 2. Nc3 e6
– Various without 3. e4
A18
English Opening
Mikenas–Carls Variation
1. c4 Nf6 2. Nc3 e6 3. e4
– Various without 3... c5
A19
English Opening
Mikenas–Carls, Sicilian Variation
1. c4 Nf6 2. Nc3 e6 3. e4 c5
A2
1. c4 e5
A20
English Opening
1. c4 e5
– Various without 2. Nc3
A21
English Opening
1. c4 e5 2. Nc3
– Various without 2... Nf6, 2... Nc6
A22
English Opening
1. c4 e5 2. Nc3 Nf6
– Various without 3. g3
– 3. g3 Various without 3... c6, 3... g6
A23
English Opening
Bremen System, Keres Variation
1. c4 e5 2. Nc3 Nf6 3. g3 c6
A24
English Opening
Bremen System with 3...g6
1. c4 e5 2. Nc3 Nf6 3. g3 g6
A25
English Opening
Sicilian Reversed
1. c4 e5 2. Nc3 Nc6
– Various without 3. g3, 3. Nf3
– 3. g3 Various without 3... g6
– 3... g6 Various without 4. Bg2
– 4. Bg2 Various without 4... Bg7
– 4... Bg7 Various without 5. d3
A26
English Opening
Closed System
1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3
A27
English Opening
Three Knights System
1. c4 e5 2. Nc3 Nc6 3. Nf3
– Various without 3... Nf6
A28
English Opening
Four Knights System
1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6
– Various without 4. g3
A29
English Opening
Four Knights, Kingside Fianchetto
1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6 4. g3
A3
1. c4 c5
A30
English Opening
Symmetrical Defence
1. c4 c5
– Various without 2. Nf3, 2. Nc3
– 2. Nf3 Various without 2... Nf6
– 2... Nf6 Various without 3. d4
A31
English Opening
Symmetrical, Benoni formation
1. c4 c5 2. Nf3 Nf6 3. d4
– Various without 3... cd4
– 3... cd4 Various without 4. Nd4
– 4. Nd4 Various without 4... e6
A32
English Opening
Symmetrical Defence
1. c4 c5 2. Nf3 Nf6 3. d4 cd4 4. Nd4 e6
– Various without 5. Nc3
– 5. Nc3 Various without 5... Nc6
A33
English Opening
Symmetrical Defence
1. c4 c5 2. Nf3 Nf6 3. d4 cd4 4. Nd4 e6 5. Nc3 Nc6
A34
English Opening
Symmetrical Defence
1. c4 c5 2. Nc3
– Various without 2... Nc6
A35
English Opening
Symmetrical Defence
1. c4 c5 2. Nc3 Nc6
– Various without 3. g3
A36
English Opening
Symmetrical Defence
1. c4 c5 2. Nc3 Nc6 3. g3
– Various without 3... g6
– 3... g6 Various without 4. Bg2
– 4. Bg2 Various without 4... Bg7
– 4... Bg7 Various without 5. Nf3
A37
English Opening
Symmetrical Defence
1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3
– Various without 5... Nf6
A38
English Opening
Symmetrical Defence
1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 Nf6
– Various without 6. O O
– 6. O O Various without 6... O O
– 6... O O Various without 7. d4
A39
English Opening
Symmetrical Defence, Main line with d4
1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 Nf6 6. O O O O 7. d4
A4
1. d4
– Various without 1... Nf6, 1... f5, 1... d5
– 1... Nf6 Various without 2. c4
A40
Queen's Pawn Game
1. d4
– Various without 1... d6, 1... c5, 1... Nf6, 1... f5, 1... d5
A41
Queen's Pawn Game
Wade Defence
1. d4 d6
– Various without 2. c4
A42
Modern Defence
Averbakh System also Wade Defence
1. d4 d6 2. c4
A43
Old Benoni Defence
1. d4 c5
– Various without 2. d5
– 2. d5 Various without 2... e5
A44
Old Benoni Defence
1. d4 c5 2. d5 e5
A45
Queen's Pawn Game
1. d4 Nf6
– Various without 2. Nf3, 2. c4
A46
Queen's Pawn Game
Torre Attack
1. d4 Nf6 2. Nf3
– Various without 2... b6, 2... g6
A47
Queen's Indian Defence
1. d4 Nf6 2. Nf3 b6
A48
King's Indian
East Indian Defence
1. d4 Nf6 2. Nf3 g6
– Various without 3. g3
A49
King's Indian
Fianchetto without c4
1. d4 Nf6 2. Nf3 g6 3. g3
A5
1. d4 Nf6 2. c4
– Various without 2... c5, 2... e6, 2... g6
– 2... c5 Various without 3. d5
– 3. d5 Various without 3... e6
A50
Queen's Pawn Game
Black Knights' Tango
1. d4 Nf6 2. c4
– Various without 2... e5, 2... d6, 2... c5, 2... e6, 2... g6
A51
Budapest Gambit declined
1. d4 Nf6 2. c4 e5
– Various without 3. de5
– 3. de5 Various without 3... Ng4
A52
Budapest Gambit
1. d4 Nf6 2. c4 e5 3. de5 Ng4
A53
Old Indian Defence
1. d4 Nf6 2. c4 d6
– Various without 3. Nc3
– 3. Nc3 Various without 3... e5
– 3... e5 Various without 4. Nf3
A54
Old Indian Defence
Ukrainian Variation
1. d4 Nf6 2. c4 d6 3. Nc3 e5 4. Nf3
– Various without 4... Nbd7
– 4... Nbd7 Various without 5. e4
A55
Old Indian Defence
1. d4 Nf6 2. c4 d6 3. Nc3 e5 4. Nf3 Nbd7 5. e4
A56
Benoni Defence
1. d4 Nf6 2. c4 c5
– Various without 3. d5
– 3. d5 Various without 3... b5, 3... e6
A57
Volga Gambit
1. d4 Nf6 2. c4 c5 3. d5 b5
– Various without 4. cb5
– 4. cb5 Various without 4... a6
– 4... a6 Various without 5. ba6
A58
Volga Gambit
1. d4 Nf6 2. c4 c5 3. d5 b5 4. cb5 a6 5. ba6
– Various without 5... Ba6
– 5... Ba6 Various without 6. Nc3
– 6. Nc3 Various without 6... d6
– 6... d6 Various without 7. e4
A59
Volga Gambit
1. d4 Nf6 2. c4 c5 3. d5 b5 4. cb5 a6 5. ba6 Ba6 6. Nc3 d6 7. e4
A6
1. d4 Nf6 2. c4 c5 3. d5 e6
A60
Benoni Defence
1. d4 Nf6 2. c4 c5 3. d5 e6
– Various without 4. Nc3
A61
Benoni Defence
1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3
– Various without 4... ed5
– 4... ed5 Various without 5. cd5
– 5. cd5 Various without 5... d6
– 5... d6 Various without 6. Nf3, 6. e4
– 6. Nf3 Various without 6... g6
– 6... g6 Various without 7. g3
A62
Benoni Defence
Fianchetto Variation
1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 ed5 5. cd5 d6 6. Nf3 g6 7. g3
– Various without 7... Bg7
– 7... Bg7 Various without 8. Bg2
– 8. Bg2 Various without 8... O O
– 8... O O Various without 9. O O
– 9. O O Various without 9... a6
A63
Benoni Defence
Fianchetto Variation
1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 ed5 5. cd5 d6 6. Nf3 g6 7. g3 Bg7 8. Bg2 O O 9. O O a6
– Various without 10. a4
– 10. a4 Various without 10... Nbd7
– 10... Nbd7 Various without 11. Nd2
A64
Benoni Defence
Fianchetto Variation
1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 ed5 5. cd5 d6 6. Nf3 g6 7. g3 Bg7 8. Bg2 O O 9. O O a6 10. a4 Nbd7 11. Nd2
A65
Benoni Defence
1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 ed5 5. cd5 d6 6. e4
– Various without 6... g6
– 6... g6 Various without 7. f4, 7. Nf3
A66
Benoni Defence
Pawn Storm Variation
1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 ed5 5. cd5 d6 6. e4 g6 7. f4
– Various without 7... Bg7
– 7... Bg7 Various without 8. Bb5, 8. Nf3
A67
Benoni Defence
Taimanov Variation
1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 ed5 5. cd5 d6 6. e4 g6 7. f4 Bg7 8. Bb5
A68
Benoni Defence
Four Pawns Attack
1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 ed5 5. cd5 d6 6. e4 g6 7. f4 Bg7 8. Nf3
– Various without 8... O O
– 8... O O Various without 9. Be2
– 9. Be2 Various without 9... Re8
A69
Benoni Defence
Four Pawns Attack
1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 ed5 5. cd5 d6 6. e4 g6 7. f4 Bg7 8. Nf3 O O 9. Be2 Re8
A7
1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 ed5 5. cd5 d6 6. e4 g6 7. Nf3
A70
Benoni Defence
1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 ed5 5. cd5 d6 6. e4 g6 7. Nf3
– Various without 7... Bg7
– 7... Bg7 Various without 8. Bg5, 8. Be2
A71
Benoni Defence
1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 ed5 5. cd5 d6 6. e4 g6 7. Nf3 Bg7 8. Bg5
A72
Benoni Defence
1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 ed5 5. cd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2
– Various without 8... O O
– 8... O O Various without 9. O O
A73
Benoni Defence
1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 ed5 5. cd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 O O 9. O O
– Various without 9... a6, 9... Re8
A74
Benoni Defence
1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 ed5 5. cd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 O O 9. O O a6
– Various without 10. a4
– 10. a4 Various without 10... Bg4
A75
Benoni Defence
1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 ed5 5. cd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 O O 9. O O a6 10. a4 Bg4
A76
Benoni Defence
1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 ed5 5. cd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 O O 9. O O Re8
– Various without 10. Nd2
A77
Benoni Defence
1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 ed5 5. cd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 O O 9. O O Re8 10. Nd2
– Various without 10... Na6
A78
Benoni Defence
1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 ed5 5. cd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 O O 9. O O Re8 10. Nd2 Na6
– Various without 11. f3
A79
Benoni Defence
1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 ed5 5. cd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 O O 9. O O Re8 10. Nd2 Na6 11. f3
A8
1. d4 f5
– Various without 2. c4
– 2. c4 Various without 2... Nf6
– 2... Nf6 Various without 3. g3
– 3. g3 Various without 3... e6
A80
Dutch Defence
1. d4 f5
– Various without 2. g3, 2. e4, 2. c4
A81
Dutch Defence
1. d4 f5 2. g3
A82
Dutch Defence
Staunton Gambit
1. d4 f5 2. e4
– Various without 2... fe4
– 2... fe4 Various without 3. Nc3
– 3. Nc3 Various without 3... Nf6
– 3... Nf6 Various without 4. Bg5
A83
Dutch Defence
Staunton Gambit
1. d4 f5 2. e4 fe4 3. Nc3 Nf6 4. Bg5
A84
Dutch Defence
1. d4 f5 2. c4
– Various without 2... Nf6
– 2... Nf6 Various without 3. Nc3, 3. g3
A85
Dutch Defence
1. d4 f5 2. c4 Nf6 3. Nc3
A86
Dutch Defence
Leningrad System
1. d4 f5 2. c4 Nf6 3. g3
– Various without 3... g6, 3... e6
– 3... g6 Various without 4. Bg2
– 4. Bg2 Various without 4... Bg7
– 4... Bg7 Various without 5. Nf3
A87
Dutch Defence
Leningrad System
1. d4 f5 2. c4 Nf6 3. g3 g6 4. Bg2 Bg7 5. Nf3
– Various without 5... O O
– 5... O O Various without 6. O O
– 6. O O Various without 6... d6
– 6... d6 Various without 7. Nc3
– 7. Nc3 Various without 7... c6, 7... Nc6
A88
Dutch Defence
Leningrad System
1. d4 f5 2. c4 Nf6 3. g3 g6 4. Bg2 Bg7 5. Nf3 O O 6. O O d6 7. Nc3 c6
A89
Dutch Defence
Leningrad System
1. d4 f5 2. c4 Nf6 3. g3 g6 4. Bg2 Bg7 5. Nf3 O O 6. O O d6 7. Nc3 Nc6
A9
1. d4 f5 2. c4 Nf6 3. g3 e6
A90
Dutch Defence
1. d4 f5 2. c4 Nf6 3. g3 e6
– Various without 4. Bg2
– 4. Bg2 Various without 4... Be7
A91
Dutch Defence
1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7
– Various without 5. Nf3
A92
Dutch Defence
Stonewall Variation
1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3
– Various without 5... O O
– 5... O O Various without 6. O O
– 6. O O Various without 6... d5, 6... d6
– 6... d5 Various without 7. b3, 7. Nc3
A93
Dutch Defence
Stonewall Variation
1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O O 6. O O d5 7. b3
– Various without 7... c6
A94
Dutch Defence
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
A95
Dutch Defence
Stonewall Variation
1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O O 6. O O d5 7. Nc3
A96
Dutch Defence
Ilyin–Genevsky System
1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O O 6. O O d6
– Various without 7. Nc3
– 7. Nc3 Various without 7... Qe8
A97
Dutch Defence
Ilyin–Genevsky System
1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O O 6. O O d6 7. Nc3 Qe8
– Various without 8. Qc2, 8. b3
A98
Dutch Defence
Ilyin–Genevsky System
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
A99
Dutch Defence
Ilyin–Genevsky System
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
B
1. e4 Various without 1... c5, 1... e6, 1... e5
1. e4 c5
B0
1. e4
– Various without 1... c6, 1... c5, 1... e6, 1... e5
B00
Nimzowitsch Defence
1. e4
– Various without 1... d5, 1... Nf6, 1... g6, 1... d6, 1... c6, 1... c5, 1... e6, 1... e5
B01
Scandinavian Defence
1. e4 d5
B02
Alekhine's Defence
1. e4 Nf6
– Various without 2. e5
– 2. e5 Various without 2... Nd5
– 2... Nd5 Various without 3. d4
B03
Alekhine's Defence
1. e4 Nf6 2. e5 Nd5 3. d4
– Various without 3... d6
– 3... d6 Various without 4. Nf3
B04
Alekhine's Defence
Modern Variation
1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3
– Various without 4... Bg4
B05
Alekhine's Defence
Modern Variation
1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4
B06
Robatsch (Modern) Defence
1. e4 g6
B07
Pirc Defence
1. e4 d6
– Various without 2. d4
– 2. d4 Various without 2... Nf6
– 2... Nf6 Various without 3. Nc3
– 3. Nc3 Various without 3... g6
– 3... g6 Various without 4. Nf3, 4. f4
B08
Pirc Defence
Classical (Two Knights) System
1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Nf3
B09
Pirc Defence
Austrian attack
1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4
B1
1. e4 c6
B10
Caro-Kann Defence
1. e4 c6
– Various without 2. Nc3, 2. d4
B11
Caro-Kann Defence
1. e4 c6 2. Nc3
B12
Caro-Kann Defence
1. e4 c6 2. d4
– Various without 2... d5
– 2... d5 Various without 3. ed5, 3. Nc3
B13
Caro-Kann Defence
1. e4 c6 2. d4 d5 3. ed5
– Various without 3... cd5
– 3... cd5 Various without 4. c4
– 4. c4 Various without 4... Nf6
– 4... Nf6 Various without 5. Nc3
– 5. Nc3 Various without 5... e6
B14
Caro-Kann Defence
1. e4 c6 2. d4 d5 3. ed5 cd5 4. c4 Nf6 5. Nc3 e6
B15
Caro-Kann Defence
1. e4 c6 2. d4 d5 3. Nc3
– Various without 3... de4
– 3... de4 Various without 4. Ne4
– 4. Ne4 Various without 4... Nf6, 4... Nd7, 4... Bf5
– 4... Nf6 Various without 5. Nf6
– 5. Nf6 ef6
B16
Caro-Kann Defence
1. e4 c6 2. d4 d5 3. Nc3 de4 4. Ne4 Nf6 5. Nf6 gf6
B17
Caro-Kann Defence
1. e4 c6 2. d4 d5 3. Nc3 de4 4. Ne4 Nd7
B18
Caro-Kann Defence
1. e4 c6 2. d4 d5 3. Nc3 de4 4. Ne4 Bf5
– Various without 5. Ng3
– 5. Ng3 Various without 5... Bg6
– 5... Bg6 Various without 6. h4
– 6. h4 Various without 6... h6
– 6... h6 Various without 7. Nf3
B19
Caro-Kann Defence
1. e4 c6 2. d4 d5 3. Nc3 de4 4. Ne4 Bf5 5. Ng3 Bg6 6. h4 h6 7. Nf3
B2
1. e4 c5
– Various without 2. Nf3
– 2. Nf3 Various without 2... Nc6, 2... e6, 2... d6
B20
Sicilian Defence
1. e4 c5
– Various without 2. f4, 2. c3, 2. Nc3, 2. Nf3
B21
Sicilian Defence
1. e4 c5 2. f4
B22
Sicilian Defence
Alapin Variation
1. e4 c5 2. c3
B23
Sicilian Defence
Closed System
1. e4 c5 2. Nc3
– Various without 2... Nc6
– 2... Nc6 Various without 3. g3
B24
Sicilian Defence
Closed System
1. e4 c5 2. Nc3 Nc6 3. g3
– Various without 3... g6
– 3... g6 Various without 4. Bg2
– 4. Bg2 Various without 4... Bg7
– 4... Bg7 Various without 5. d3
– 5. d3 Various without 5... d6
B25
Sicilian Defence
Closed System
1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6
– Various without 6. Be3
B26
Sicilian Defence
Closed System
1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. Be3
B27
Sicilian Defence
Katalimov Variation
1. e4 c5 2. Nf3
– Various without 2... a6, 2... Nf6, 2... Nc6, 2... e6, 2... d6
B28
Sicilian Defence
O'Kelly Variation
1. e4 c5 2. Nf3 a6
B29
Sicilian Defence
Nimzowitsch–Rubinstein Variation
1. e4 c5 2. Nf3 Nf6
B3
1. e4 c5 2. Nf3 Nc6
B30
Sicilian Defence
Rossolimo Variation
1. e4 c5 2. Nf3 Nc6
– Various without 3. Bb5, 3. d4
– 3. Bb5 Various without 3... g6
B31
Sicilian Defence
Nimzowitsch–Rossolimo Attack
1. e4 c5 2. Nf3 Nc6 3. Bb5 g6
B32
Sicilian Defence
La Bourdonnais Variation
1. e4 c5 2. Nf3 Nc6 3. d4
– Various without 3... cd4
– 3... cd4 Various without 4. Nd4
– 4. Nd4 Various without 4... Nf6, 4... g6
B33
Sicilian Defence
Lasker Variation
1. e4 c5 2. Nf3 Nc6 3. d4 cd4 4. Nd4 Nf6
B34
Sicilian Defence
Simagin Variation
1. e4 c5 2. Nf3 Nc6 3. d4 cd4 4. Nd4 g6
– Various without 5. Nc3, 5. c4
– 5. Nc3 Various without 5... Bg7
– 5... Bg7 Various without 6. Be3
– 6. Be3 Various without 6... Nf6
– 6... Nf6 Various without 7. Bc4
B35
Sicilian Defence
Simagin Variation
1. e4 c5 2. Nf3 Nc6 3. d4 cd4 4. Nd4 g6 5. Nc3 Bg7 6. Be3 Nf6 7. Bc4
B36
Sicilian Defence
Maróczy Bind
1. e4 c5 2. Nf3 Nc6 3. d4 cd4 4. Nd4 g6 5. c4
– Various without 5... Bg7
B37
Sicilian Defence
Maróczy Bind
1. e4 c5 2. Nf3 Nc6 3. d4 cd4 4. Nd4 g6 5. c4 Bg7
– Various without 6. Be3
B38
Sicilian Defence
Maróczy Bind
1. e4 c5 2. Nf3 Nc6 3. d4 cd4 4. Nd4 g6 5. c4 Bg7 6. Be3
– Various without 6... Nf6
– 6... Nf6 Various without 7. Nc3
– 7. Nc3 Various without 7... Ng4
B39
Sicilian Defence
Maróczy Bind
1. e4 c5 2. Nf3 Nc6 3. d4 cd4 4. Nd4 g6 5. c4 Bg7 6. Be3 Nf6 7. Nc3 Ng4
B4
1. e4 c5 2. Nf3 e6
B40
Sicilian Defence
Paulsen Variation
1. e4 c5 2. Nf3 e6
– Various without 3. d4
B41
Sicilian Defence
Paulsen Variation
1. e4 c5 2. Nf3 e6 3. d4
– Various without 3... cd4
– 3... cd4 Various without 4. Nd4
– 4. Nd4 Various without 4... a6, 4... Nc6
– 4... a6 Various without 5. Bd3, 5. Nc3
B42
Sicilian Defence
Paulsen Variation
1. e4 c5 2. Nf3 e6 3. d4 cd4 4. Nd4 a6 5. Bd3
B43
Sicilian Defence
Paulsen Variation
1. e4 c5 2. Nf3 e6 3. d4 cd4 4. Nd4 a6 5. Nc3
B44
Sicilian Defence
Paulsen Variation
1. e4 c5 2. Nf3 e6 3. d4 cd4 4. Nd4 Nc6
– Various without 5. Nc3
B45
Sicilian Defence
Paulsen Variation
1. e4 c5 2. Nf3 e6 3. d4 cd4 4. Nd4 Nc6 5. Nc3
– Various without 5... a6, 5... Qc7
B46
Sicilian Defence
Paulsen Variation
1. e4 c5 2. Nf3 e6 3. d4 cd4 4. Nd4 Nc6 5. Nc3 a6
B47
Sicilian Defence
Paulsen Variation
1. e4 c5 2. Nf3 e6 3. d4 cd4 4. Nd4 Nc6 5. Nc3 Qc7
– Various without 6. Be3
B48
Sicilian Defence
Paulsen Variation
1. e4 c5 2. Nf3 e6 3. d4 cd4 4. Nd4 Nc6 5. Nc3 Qc7 6. Be3
– Various without 6... a6
– 6... a6 Various without 7. Be2
B49
Sicilian Defence
Paulsen Variation
1. e4 c5 2. Nf3 e6 3. d4 cd4 4. Nd4 Nc6 5. Nc3 Qc7 6. Be3 a6 7. Be2
B5
1. e4 c5 2. Nf3 d6
– Various without 3. d4
– 3. d4 Various without 3... cd4
– 3... cd4 Various without 4. Nd4
– 4. Nd4 Various without 4... Nf6
– 4... Nf6 Various without 5. Nc3
– 5. Nc3 Various without 5... Nc6, 5... g6, 5...e6, 5... a6
– 5... Nc6 Various without 6. Bg5
B50
Sicilian Defence
1. e4 c5 2. Nf3 d6
– Various without 3. Bb5, 3. d4
B51
Sicilian Defence
Canal–Sokolsky Attack
1. e4 c5 2. Nf3 d6 3. Bb5
– Various without 3... Bd7
B52
Sicilian Defence
Canal–Sokolsky Attack
1. e4 c5 2. Nf3 d6 3. Bb5 Bd7
B53
Sicilian Defence
Chekhover Variation
1. e4 c5 2. Nf3 d6 3. d4
– Various without 3... cd4
– 3... cd4 Various without 4. Nd4
B54
Sicilian Defence
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4
– Various without 4... Nf6
B55
Sicilian Defence
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6
– Various without 5. f3, 5. Nc3
– 5. f3
B56
Sicilian Defence
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3
– Various without 5... Nc6, 5... g6, 5... e6, 5... a6
– 5... Nc6 Various without 6. Bc4, 6. Be2, 6. Bg5
B57
Sicilian Defence
Sozin Attack
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 Nc6 6. Bc4
B58
Sicilian Defence
Boleslavsky Variation
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 Nc6 6. Be2
– Various without 6... e5
– 6... e5 Various without 7. Nb3
B59
Sicilian Defence
Boleslavsky Variation
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 Nc6 6. Be2 e5 7. Nb3
B6
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 Nc6 6. Bg5
B60
Sicilian Defence
Richter–Rauzer Attack
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 Nc6 6. Bg5
– Various without 6... Bd7, 6... e6
– 6... Bd7 Various without 7. Qd2
B61
Sicilian Defence
Richter–Rauzer Attack
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 Nc6 6. Bg5 Bd7 7. Qd2
B62
Sicilian Defence
Richter–Rauzer Attack
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 Nc6 6. Bg5 e6
– Various without 7. Qd2
B63
Sicilian Defence
Richter–Rauzer Attack
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2
– Various without 7... Be7, 7... a6
– 7... Be7 Various without 8. O O O
– 8. O O O Various without 8... O O
– 8... O O Various without 9. f4
B64
Sicilian Defence
Richter–Rauzer Attack
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 Be7 8. O O O O O 9. f4
– Various without 9... Nd4
B65
Sicilian Defence
Richter–Rauzer Attack
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 Be7 8. O O O O O 9. f4 Nd4 10. Qd4
B66
Sicilian Defence
Richter–Rauzer Attack
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 a6
– Various without 8. O O O
– 8. O O O Various without 8... Bd7
B67
Sicilian Defence
Richter–Rauzer Attack
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 a6 8. O O O Bd7
– Various without 9. f4
– 9. f4 Various without 9... Be7
B68
Sicilian Defence
Richter–Rauzer Attack
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 a6 8. O O O Bd7 9. f4 Be7
– Various without 10. Nf3
– 10. Nf3 Various without 10... b5
– 10... b5 Various without 11. Bf6
B69
Sicilian Defence
Richter–Rauzer Attack
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 a6 8. O O O Bd7 9. f4 Be7 10. Nf3 b5 11. Bf6
B7
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 g6
B70
Sicilian Defence
Dragon Variation
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 g6
– Various without 6. f4, 6. Be3
B71
Sicilian Defence
Dragon Variation
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 g6 6. f4
B72
Sicilian Defence
Dragon Variation
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 g6 6. Be3
– Various without 6...Bg7
– 6... Bg7 Various without 7. Be2, 7. f3
– 7. Be2 Various without 7... Nc6
– 7... Nc6 Various without 8. O O
B73
Sicilian Defence
Dragon Variation
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 Nc6 8. O O
– Various without 8... O O
– 8... O O Various without 9. Nb3
B74
Sicilian Defence
Dragon Variation
1. e4 c5 2. Nf3 d6 3. d4 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. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3
– Various without 7... O O
B76
Sicilian Defence
Dragon Variation
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O O
– Various without 8. Qd2
– 8. Qd2 Various without 8... Nc6
– 8... Nc6 Various without 9. Bc4
B77
Sicilian Defence
Dragon Variation
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O O 8. Qd2 Nc6 9. Bc4
– Various without 9... Bd7
– 9... Bd7 Various without 10. O O O
B78
Sicilian Defence
Dragon Variation
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O O 8. Qd2 Nc6 9. Bc4 Bd7 10. O O O
– Various without 10... Qa5
B79
Sicilian Defence
Dragon Variation
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O O 8. Qd2 Nc6 9. Bc4 Bd7 10. O O O Qa5
B8
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 e6
B80
Sicilian Defence
Scheveningen Variation
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 e6
– Various without 6. g4, 6. f4, 6. Be2, 6. Bc4
B81
Sicilian Defence
Scheveningen Variation
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 e6 6. g4
B82
Sicilian Defence
Scheveningen Variation
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 e6 6. f4
B83
Sicilian Defence
Scheveningen Variation
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 e6 6. Be2
– Various without 6... a6
B84
Sicilian Defence
Scheveningen Variation
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 e6 6. Be2 a6
– Various without 7. O O
B85
Sicilian Defence
Scheveningen Variation
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 e6 6. Be2 a6 7. O O
B86
Sicilian Defence
Sozin Attack
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 e6 6. Bc4
– Various without 6... a6, 6... Nc6
– 6... a6 Various without 7. Bb3
– 7. Bb3 Various without 7... b5
B87
Sicilian Defence
Sozin Attack
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 e6 6. Bc4 a6 7. Bb3 b5
B88
Sicilian Defence
Sozin Attack
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 e6 6. Bc4 Nc6
– Various without 7. Be3
B89
Sicilian Defence
Sozin Attack
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 e6 6. Bc4 Nc6 7. Be3
B9
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 a6
B90
Sicilian Defence
Najdorf Variation
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 a6
– Various without 6. g3, 6. Be2, 6. f4, 6. Bg5
B91
Sicilian Defence
Najdorf Variation
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 a6 6. g3
B92
Sicilian Defence
Najdorf Variation
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 a6 6. Be2
B93
Sicilian Defence
Najdorf Variation
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 a6 6. f4
B94
Sicilian Defence
Najdorf Variation
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 a6 6. Bg5
– Various without 6... e6
B95
Sicilian Defence
Najdorf Variation
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 a6 6. Bg5 e6
– Various without 7. f4
B96
Sicilian Defence
Najdorf Variation
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4
– Various without 7... Qb6, 7... Be7
B97
Sicilian Defence
Najdorf Variation
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Qb6
B98
Sicilian Defence
Najdorf Variation
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7
– Various without 8. Qf3
– 8. Qf3 Various without 8... Qc7
– 8... Qc7 Various without 9. O O O
– 9. O O O Various without 9... Nbd7
B99
Sicilian Defence
Najdorf Variation
1. e4 c5 2. Nf3 d6 3. d4 cd4 4. Nd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Qf3 Qc7 9. O O O Nbd7
C
1. e4 e6
1. e4 e5
C0
1. e4 e6
– Various without 2. d4
– 2. d4 Various without 2... d5
– 2... d5 Various without 3. Nc3
C00
French Defence
1. e4 e6
- Various without 2. d4
C01
French Defence
Exchange Variation
1. e4 e6 2. d4
– Various without 2... d5
– 2... d5 Various without 3. e5, 3. Nd2, 3. Nc3
C02
French Defence
Advance Variation
1. e4 e6 2. d4 d5 3. e5
C03
French Defence
Tarrasch Variation
1. e4 e6 2. d4 d5 3. Nd2
– Various without 3... Nc6, 3... Nf6, 3... c5
C04
French Defence
Tarrasch Variation
1. e4 e6 2. d4 d5 3. Nd2 Nc6
C05
French Defence
Tarrasch Variation
1. e4 e6 2. d4 d5 3. Nd2 Nf6
– Various without 4. e5
– 4. e5 Various without 4... Nfd7
– 4... Nfd7 Various without 5. Bd3
C06
French Defence
Tarrasch Variation
1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3
C07
French Defence
Tarrasch Variation
1. e4 e6 2. d4 d5 3. Nd2 c5
– Various without 4. ed5
– 4. ed5 Various without 4... ed5
C08
French Defence
Tarrasch Variation
1. e4 e6 2. d4 d5 3. Nd2 c5 4. ed5 ed5
– Various without 5. Ngf3
– 5. Ngf3 Various without 5... Nc6
C09
French Defence
Tarrasch Variation
1. e4 e6 2. d4 d5 3. Nd2 c5 4. ed5 ed5 5. Ngf3 Nc6
C1
1. e4 e6 2. d4 d5 3. Nc3
C10
French Defence
1. e4 e6 2. d4 d5 3. Nc3
– Various without 3... Nf6, 3... Bb4
C11
French Defence
1. e4 e6 2. d4 d5 3. Nc3 Nf6
– Various without 4. Bg5
C12
French Defence
1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5
– Various without 4... de4, 4... Be7
C13
French Defence
Classical Variation
1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 de4
C14
French Defence
Classical Variation
1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7
C15
French Defence
Winawer (Nimzovich) Variation
1. e4 e6 2. d4 d5 3. Nc3 Bb4
– Various without 4. e5
C16
French Defence
Winawer, Advance Variation
1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5
– Various without 4... c5
C17
French Defence
Winawer, Advance Variation
1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5
– Various without 5. a3
C18
French Defence
Winawer, Advance Variation
1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3
– Various without 5... Bc3
– 5... Bc3 6. bc3 Various without 6... Ne7
– 6... Ne7 Various without 7. Qg4
C19
French Defence
Winawer, Advance Variation
1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bc3 6. bc3 Ne7 7. Qg4
C2
1. e4 e5
– Various without 2. f4, 2. Nf3
C20
King's Pawn Game
1. e4 e5
– Various without 2. d4, 2. Bc4, 2. Nc3, 2. f4, 2. Nf3
C21
Center Game
1. e4 e5 2. d4
– Various without 2... ed4
– 2... ed4 Various without 3. Qd4
C22
Center Game
1. e4 e5 2. d4 ed4 3. Qd4
C23
Bishop's Opening
1. e4 e5 2. Bc4
– Various without 2... Nf6
C24
Bishop's Opening
Berlin Defence
1. e4 e5 2. Bc4 Nf6
C25
Vienna Game
1. e4 e5 2. Nc3
– Various without 2... Nf6
C26
Vienna Game
1. e4 e5 2. Nc3 Nf6
– Various without 3. Bc4, 3. f4
C27
Vienna Game
1. e4 e5 2. Nc3 Nf6 3. Bc4
– Various without 3... Nc6
C28
Vienna Game
1. e4 e5 2. Nc3 Nf6 3. Bc4 Nc6
C29
Vienna Game
Kaufmann Variation
1. e4 e5 2. Nc3 Nf6 3. f4
C3
1. e4 e5 2. f4
C30
King's Gambit
1. e4 e5 2. f4
– Various without 2... d5, 2... ef4
C31
King's Gambit Declined
Falkbeer Counter Gambit
1. e4 e5 2. f4 d5
– Various without 3. ed5
– 3. ed5 Various without 3... e4
C32
King's Gambit Declined
Falkbeer Counter Gambit
1. e4 e5 2. f4 d5 3. ed5 e4
C33
King's Gambit Accepted
1. e4 e5 2. f4 ef4
– Various without 3. Nf3
C34
King's Gambit Accepted
1. e4 e5 2. f4 ef4 3. Nf3
– Various without 3... Be7, 3... d5, 3... g5
C35
King's Gambit Accepted
Cunningham Variation
1. e4 e5 2. f4 ef4 3. Nf3 Be7
C36
King's Gambit Accepted
Modern Variation
1. e4 e5 2. f4 ef4 3. Nf3 d5
C37
King's Gambit Accepted
1. e4 e5 2. f4 ef4 3. Nf3 g5
– Various without 4. Bc4, 4. h4
– 4. Bc4 Various without 4... Bg7
C38
King's Gambit Accepted
Greco & Philidor Gambits
1. e4 e5 2. f4 ef4 3. Nf3 g5 4. Bc4 Bg7
C39
King's Gambit Accepted
Allagier & Kiesertisky Gambits
1. e4 e5 2. f4 ef4 3. Nf3 g5 4. h4
C4
1. e4 e5 2. Nf3
– Various without 2... Nc6
– 2... Nc6 Various without 3. Bc4, 3. Bb5
C40
King's Knight Opening
1. e4 e5 2. Nf3
– Various without 2... d6, 2... Nf6, 2... Nc6
C41
Philidor Defence
1. e4 e5 2. Nf3 d6
C42
Petrov's Defence
1. e4 e5 2. Nf3 Nf6
– Various without 3. d4
C43
Petrov's Defence
1. e4 e5 2. Nf3 Nf6 3. d4
C44
Ponziani Opening
1. e4 e5 2. Nf3 Nc6
– Various without 3. d4, 3. Nc3, 3. Bc4, 3. Bb5
– 3. d4 Various without 3... ed4
– 3... ed4 Various without 4. Nd4
C45
Scotch Game
1. e4 e5 2. Nf3 Nc6 3. d4 ed4 4. Nd4
C46
Three Knights Game
1. e4 e5 2. Nf3 Nc6 3. Nc3
– Various without 3... Nf6
C47
Four Knights Game
1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6
– Various without 4. Bb5
C48
Four Knights Game
Spanish Variation
1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5
– Various without 4... Bb4
C49
Four Knights Game
Double Ruy Lopez
1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4
C5
1. e4 e5 2. Nf3 Nc6 3. Bc4
C50
King's Pawn Game
1. e4 e5 2. Nf3 Nc6 3. Bc4
– Various without 3... Bc5, 3... Nf6
– 3... Bc5 Various without 4. b4, 4. c3
C51
Evans Gambit
1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4
– Various without 4... Bb4
– 4... Bb4 Various without 5. c3
– 5. c3 Various without 5... Ba5
C52
Evans Gambit
1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bb4 5. c3 Ba5
C53
Giuoco Piano
1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3
– Various without 4... Nf6
C54
Giuoco Piano
1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6
C55
Two Knights Defence
1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6
– Various without 4. d4, 4. Ng5
C56
Two Knights Defence
1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4
C57
Two Knights Defence
1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5
– Various without 4... d5
– 4... d5 Various without 5. ed5
– 5. ed5 Various without 5... Na5
C58
Two Knights Defence
1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. ed5 Na5
– Various without 6. Bb5
– 6. Bb5 Various without 6... c6
– 6... c6 Various without 7. dc6
– 7. dc6 Various without 7... bc6
– 7... bc6 Various without 8. Be2
C59
Two Knights Defence
1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. ed5 Na5 6. Bb5 c6 7. dc6 bc6 8. Be2
C6
1. e4 e5 2. Nf3 Nc6 3. Bb5
– Various without 3... a6
– 3... a6 Various without 4. Ba4
C60
Ruy Lopez
1. e4 e5 2. Nf3 Nc6 3. Bb5
– Various without 3... Nd4, 3... d6, 3... f5, 3... Bc5, 3... Nf6, 3... a6
C61
Ruy Lopez
Bird's Defence
1. e4 e5 2. Nf3 Nc6 3. Bb5 Nd4
C62
Ruy Lopez
Old Steinitz Defence
1. e4 e5 2. Nf3 Nc6 3. Bb5 d6
C63
Ruy Lopez
Schliemann Defence
1. e4 e5 2. Nf3 Nc6 3. Bb5 f5
C64
Ruy Lopez
Classical (Cordel) Defence
1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5
C65
Ruy Lopez
Berlin Defence
1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6
– Various without 4. O O
– 4. O O Various without 4... d6, 4... Ne4
C66
Ruy Lopez
Berlin Defence
1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O O d6
C67
Ruy Lopez
Berlin Defence
1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O O Ne4
C68
Ruy Lopez
Exchange Variation
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6
– Various without 4. Bc6, 4. Ba4
– 4. Bc6 Various without 4... dc6
– 4... dc6 Various without 5. O O
– 5. O O Various without 5... f6
C69
Ruy Lopez
Exchange Variation
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bc6 dc6 5. O O f6
C7
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4
– Various without 4... Nf6
– 4... Nf6 Various without 5. O O
– 5. O O Various without 5... Ne4, 5... Be7
C70
Ruy Lopez
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4
– Various without 4... d6, 4... Nf6
C71
Ruy Lopez
Modern Steinitz Defence
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6
– Various without 5. O O, 5. Bc6, 5. c3
C72
Ruy Lopez
Modern Steinitz Defence
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. O O
C73
Ruy Lopez
Modern Steinitz Defence
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. Bc6 bc6
C74
Ruy Lopez
Modern Steinitz Defence
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3
– Various without 5... Bd7
C75
Ruy Lopez
Modern Steinitz Defence
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3 Bd7
– Various without 6. d4
– 6. d4 Various without 6... g6
C76
Ruy Lopez
Modern Steinitz Defence
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3 Bd7 6. d4 g6
C77
Ruy Lopez
Morphy Defence
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6
– Various without 5. O O
C78
Ruy Lopez
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O O
– Various without 5... d6, 5... Ne4, 5... Be7
C79
Ruy Lopez
Steinitz Defence Deferred
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O O d6
C8
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O O
– 5... Ne4
– 5... Be7 Various without 6. Re1
– 6. Re1 Various without 6... b5
– 6... b5 7. Bb3 Various without 7... d6
C80
Ruy Lopez
Open (Tarrasch) Defence
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O O Ne4
– Various without 6. d4
– 6. d4 Various without 6... b5
– 6... b5 Various without 7. Bb3
– 7. Bb3 Various without 7... d5
– 7... d5 Various without 8. de5
– 8. de5 Various without 8... Be6
– 8... Be6 Various without 9. Qe2, 9. c3
C81
Ruy Lopez
Open, Howell Attack
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O O Ne4 6. d4 b5 7. Bb3 d5 8. de5 Be6 9. Qe2
C82
Ruy Lopez
Open Defence
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O O Ne4 6. d4 b5 7. Bb3 d5 8. de5 Be6 9. c3
– Various without 9... Be7
C83
Ruy Lopez
Open, Classical Defence
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O O Ne4 6. d4 b5 7. Bb3 d5 8. de5 Be6 9. c3 Be7
C84
Ruy Lopez
Closed Defence
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O O Be7
– Various without 6. Bc6, 6. Qe2, 6. Re1
C85
Ruy Lopez
Exchange Variation Doubly Deferred
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O O Be7 6. Bc6
C86
Ruy Lopez
Worrall Attack
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O O Be7 6. Qe2
C87
Ruy Lopez
Closed, Averbakh Variation
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O O Be7 6. Re1
– Various without 6... b5
C88
Ruy Lopez
Closed Defence
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O O Be7 6. Re1 b5 7. Bb3
– Various without 7... O O, 7... d6
– 7... O O Various without 8. c3
C89
Ruy Lopez
Marshall Counterattack
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O O Be7 6. Re1 b5 7. Bb3 O O 8. c3
C9
1. e4 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. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O O Be7 6. Re1 b5 7. Bb3 d6
– Various without 8. c3
– 8. c3 Various without 8... O O
– 8... O O Various without 9. d4, 9. h3
C91
Ruy Lopez
Closed Defence
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O O 9. d4
C92
Ruy Lopez
Closed Defence
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O O 9. h3
– Various without 9... h6, 9... Nb8, 9... Na5
C93
Ruy Lopez
Closed, Smyslov Defence
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O O 9. h3 h6
C94
Ruy Lopez
Closed, Breyer Defence
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O O 9. h3 Nb8
– Various without 10. d4
C95
Ruy Lopez
Closed, Breyer Defence
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O O 9. h3 Nb8 10. d4
C96
Ruy Lopez
Closed Defence
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O O 9. h3 Na5
– Various without 10. Bc2
– 10. Bc2 Various without 10... c5
– 10... c5 Various without 11. d4
– 11. d4 Various without 11... Qc7
C97
Ruy Lopez
Closed, Chigorin Defence
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O O 9. h3 Na5 10. Bc2 c5 11. d4 Qc7
– Various without 12. Nbd2
– 12. Nbd2 Various without 12... Nc6, 12... cd4
C98
Ruy Lopez
Closed, Chigorin Defence
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O O 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 Nc6
C99
Ruy Lopez
Closed, Chigorin Defence
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O O 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 cd4
D
1. d4 d5
1. d4 Nf6 2. c4 g6 with 3... d5
D0
1. d4 d5
– Various without 2. c4
– 2. c4 Various without 2... c6, 2... dc4, 2... e6
D00
Queen's Pawn Game
1. d4 d5
– Various without 2. Nc3, 2. Nf3, 2. c4
D01
Richter–Veresov Attack
1. d4 d5 2. Nc3
D02
Queen's Pawn Game
1. d4 d5 2. Nf3
– Various without 2... Nf6
– 2... Nf6 Various without 3. Bg5, 3. e3
D03
Torre Attack
Tartakower Variation
1. d4 d5 2. Nf3 Nf6 3. Bg5
D04
Queen's Pawn Game
1. d4 d5 2. Nf3 Nf6 3. e3
– Various without 3... e6
D05
Queen's Pawn Game
Zukertort Variation (including Colle system)
1. d4 d5 2. Nf3 Nf6 3. e3 e6
D06
Queen's Gambit Defence
1. d4 d5 2. c4
– Various without 2... Nc6, 2... e5, 2... c6, 2... dc4, 2... e6
D07
Queen's Gambit Defence
Chigorin Defence
1. d4 d5 2. c4 Nc6
D08
Queen's Gambit Defence
Albin Countergambit and Lasker Trap
1. d4 d5 2. c4 e5
– Various without 3. de5
– 3. de5 Various without 3... d4
– 3... d4 Various without 4. Nf3
– 4. Nf3 Various without 4... Nc6
– 4... Nc6 Various without 5. g3
D09
Queen's Gambit Defence
Albin Countergambit
1. d4 d5 2. c4 e5 3. de5 d4 4. Nf3 Nc6 5. g3
D1
1. d4 d5 2. c4 c6
D10
Queen's Gambit Defence
Slav Defence
1. d4 d5 2. c4 c6
– Various without 3. Nf3
D11
Queen's Gambit Defence
Slav Defence
1. d4 d5 2. c4 c6 3. Nf3
– Various without 3... Nf6
– 3... Nf6 Various without 4. e3, 4. cd5, 4. Nc3
D12
Queen's Gambit Defence
Slav Defence
1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3
D13
Queen's Gambit Defence
Slav Defence, Exchange Variation
1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. cd5
– Various without 4... cd5
– 4... cd5 Various without 5. Nc3
– 5. Nc3 Various without 5... Nc6
– 5... Nc6 Various without 6. Bf4
– 6. Bf4 Various without 6... Bf5
D14
Queen's Gambit Defence
Slav Defence, Exchange Variation
1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. cd5 cd5 5. Nc3 Nc6 6. Bf4 Bf5
D15
Queen's Gambit Defence
Slav Defence
1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3
– Various without 4... dc4
– 4... dc4 Various without 5. a4
D16
Queen's Gambit Defence
Slav accepted, Alapin Variation
1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dc4 5. a4
– Various without 5... Bf5
D17
Queen's Gambit Defence
Slav Defence, Czech Defence
1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dc4 5. a4 Bf5
– Various without 6. e3
D18
Queen's Gambit Defence
Dutch Variation
1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dc4 5. a4 Bf5 6. e3
– Various without 6... e6
– 6... e6 Various without 7. Bc4
– 7. Bc4 Various without 7... Bb4
– 7... Bb4 Various without 8. O O
– 8. O O Various without 8... O O
– 8... O O Various without 9. Qe2
D19
Queen's Gambit Defence
Dutch Variation
1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dc4 5. a4 Bf5 6. e3 e6 7. Bc4 Bb4 8. O O O O 9. Qe2
D2
1. d4 d5 2. c4 dc4
D20
Queen's Gambit Accepted
1. d4 d5 2. c4 dc4
– Various without 3. Nf3
D21
Queen's Gambit Accepted
1. d4 d5 2. c4 dc4 3. Nf3
– Various without 3... a6, 3... Nf6
D22
Queen's Gambit Accepted
Alekhine Defence
1. d4 d5 2. c4 dc4 3. Nf3 a6
D23
Queen's Gambit Accepted
1. d4 d5 2. c4 dc4 3. Nf3 Nf6
– Various without 4. Nc3, 4. e3
D24
Queen's Gambit Accepted
1. d4 d5 2. c4 dc4 3. Nf3 Nf6 4. Nc3
D25
Queen's Gambit Accepted
1. d4 d5 2. c4 dc4 3. Nf3 Nf6 4. e3
– Various without 4... e6
D26
Queen's Gambit Accepted
Classical Variation
1. d4 d5 2. c4 dc4 3. Nf3 Nf6 4. e3 e6
– Various without 5. Bc4
– 5. Bc4 Various without 5... c5
– 5... c5 Various without 6. O O
D27
Queen's Gambit Accepted
Classical Variation
1. d4 d5 2. c4 dc4 3. Nf3 Nf6 4. e3 e6 5. Bc4 c5 6. O O
– Various without 6... a6
– 6... a6 Various without 7. Qe2
D28
Queen's Gambit Accepted
Classical Variation
1. d4 d5 2. c4 dc4 3. Nf3 Nf6 4. e3 e6 5. Bc4 c5 6. O O a6 7. Qe2
– Various without 7... b5
D29
Queen's Gambit Accepted
Classical Variation
1. d4 d5 2. c4 dc4 3. Nf3 Nf6 4. e3 e6 5. Bc4 c5 6. O O a6 7. Qe2 b5
D3
1. d4 d5 2. c4 e6
– Various without 3. Nc3
– 3. Nc3 Various without 3... Nf6
– 3... Nf6 Various without 4. Nf3, 4. Bg5
– 4. Nf3 Various without 4... c5, 4...c6
D30
Queen's Gambit Declined
Orthodox Defence
1. d4 d5 2. c4 e6
– Various without 3. Nc3
D31
Queen's Gambit Declined
Semi-Slav Defence
1. d4 d5 2. c4 e6 3. Nc3
– Various without 3... c5, 3... Nf6
D32
Queen's Gambit Declined
Tarrasch Defence
1. d4 d5 2. c4 e6 3. Nc3 c5
– Various without 4. cd5
– 4. cd5 Various without 4... ed5
– 4... ed5 Various without 5. Nf3
– 5. Nf3 Various without 5... Nc6
– 5... Nc6 Various without 6. g3
D33
Queen's Gambit Declined
Tarrasch Defence
1. d4 d5 2. c4 e6 3. Nc3 c5 4. cd5 ed5 5. Nf3 Nc6 6. g3
– Various without 6... Nf6
D34
Queen's Gambit Declined
Tarrasch Defence
1. d4 d5 2. c4 e6 3. Nc3 c5 4. cd5 ed5 5. Nf3 Nc6 6. g3 Nf6
D35
Queen's Gambit Declined
Exchange Variation
1. d4 d5 2. c4 e6 3. Nc3 Nf6
– Various without 4. cd5, 4. Nf3, 4. Bg5
– 4. cd5 Various without 4... ed5
– 4... ed5 Various without 5. Bg5
– 5. Bg5 Various without 5... c6
– 5... c6 Various without 6. Qc2
D36
Queen's Gambit Declined
Exchange Variation
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cd5 ed5 5. Bg5 c6 6. Qc2
D37
Queen's Gambit Declined
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3
– Various without 4... Bb4, 4... c5, 4... c6
D38
Queen's Gambit Declined
Ragozin Variation
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Bb4
– Various without 5. Bg5
D39
Queen's Gambit Declined
Ragozin Variation
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Bb4 5. Bg5
D4
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3
– 4... c5
– 4... c6
D40
Queen's Gambit Declined
Semi-Tarrasch Defence
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5
– Various without 5. cd5
D41
Queen's Gambit Declined
Semi-Tarrasch Defence
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. cd5
– Various without 5... Nd5
– 5... Nd5 Various without 6. e3
D42
Queen's Gambit Declined
Semi-Tarrasch Defence
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. cd5 Nd5 6. e3
D43
Queen's Gambit Declined
Semi-Slav Defence
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6
– Various without 5. Bg5, 5. e3
– 5. Bg5 Various without 5... dc4
D44
Queen's Gambit Declined
Semi-Slav Defence
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. Bg5 dc4
D45
Queen's Gambit Declined
Semi-Slav Defence
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3
– Various without 5... Nbd7
– 5... Nbd7 Various without 6. Bd3
D46
Queen's Gambit Declined
Semi-Slav Defence
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3
– Various without 6... dc4
D47
Queen's Gambit Declined
Semi-Slav Defence
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3 dc4 7. Bc4
– Various without 7... b5
– 7... b5 Various without 8. Bd3
– 8. Bd3 Various without 8... a6
D48
Queen's Gambit Declined
Meran Defence
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3 dc4 7. Bc4 b5 8. Bd3 a6
– Various without 9. e4
– 9. e4 Various without 9... c5
– 9... c5 Various without 10. e5
D49
Queen's Gambit Declined
Meran Defence
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3 dc4 7. Bc4 b5 8. Bd3 a6 9. e4 c5 10. e5
D5
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5
– Various without 4... Be7
– 4... Be7 Various without 5. e3
– 5. e3 Various without 5... O O
– 5... O O Various without 6. Nf3
– 6. Nf3 Various without 6... Nbd7
D50
Queen's Gambit Declined
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5
– Various without 4... Nbd7, 4... Be7
D51
Queen's Gambit Declined
Cambridge Springs Defence
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7
– Various without 5. e3
– 5. e3 Various without 5... c6
– 5... c6 Various without 6. Nf3
D52
Queen's Gambit Declined
Cambridge Springs Defence
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 c6 6. Nf3
D53
Queen's Gambit Declined
Orthodox Defence
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7
– Various without 5. e3
D54
Queen's Gambit Declined
Orthodox Defence
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3
– Various without 5... O O
– 5... O O Various without 6. Nf3
D55
Queen's Gambit Declined
Anti-Tartakower System
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O O 6. Nf3
– Various without 6... h6, 6... Nbd7
– 6... h6 Various without 7. Bh4
D56
Queen's Gambit Declined
Lasker System
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O O 6. Nf3 h6 7. Bh4
– Various without 7... Ne4, 7... b6
– 7... Ne4 Various without 8. Be7
– 8. Be7 Various without 8... Qe7
– 8... Qe7 Various without 9. cd5
D57
Queen's Gambit Declined
Lasker System
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O O 6. Nf3 h6 7. Bh4 Ne4
8. Be7 Qe7 9. cd5
D58
Queen's Gambit Declined
Tartakower System
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O O 6. Nf3 h6 7. Bh4 b6
– Various without 8. cd5
D59
Queen's Gambit Declined
Tartakower System
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O O 6. Nf3 h6 7. Bh4 b6 8. cd5
D6
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O O 6. Nf3 Nbd7
D60
Queen's Gambit Declined
Orthodox Defence
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O O 6. Nf3 Nbd7
– Various without 7. Qc2, 7. Rc1
D61
Queen's Gambit Declined
Orthodox Defence
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O O 6. Nf3 Nbd7 7. Qc2
– Various without 7... c5
– 7... c5 Various without 8. cd5
D62
Queen's Gambit Declined
Orthodox Defence
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O O 6. Nf3 Nbd7 7. Qc2 c5 8. cd5
D63
Queen's Gambit Declined
Orthodox Defence
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O O 6. Nf3 Nbd7 7. Rc1
– Various without 7... c6
D64
Queen's Gambit Declined
Orthodox Defence
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O O 6. Nf3 Nbd7 7. Rc1 c6
– Various without 8. Qc2, 8. Bd3
– 8. Qc2 Various without 8... a6
– 8... a6 Various without 9. cd5
D65
Queen's Gambit Declined
Orthodox Defence
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O O 6. Nf3 Nbd7 7. Rc1 c6 8. Qc2 a6 9. cd5
D66
Queen's Gambit Declined
Orthodox Defence
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3
– Various without 8... dc4
– 8... dc4 Various without 9. Bc4
– 9. Bc4 Various without 9... Nd5
D67
Queen's Gambit Declined
Orthodox Defence
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3 dc4 9. Bc4 Nd5
– Various without 10. Be7
– 10. Be7 Various without 10... Qe7
– 10... Qe7 Various without 11. O O
D68
Queen's Gambit Declined
Orthodox Defence
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3 dc4 9. Bc4 Nd5 10. Be7 Qe7 11. O O
– Various without 11... Nc3
– 11... Nc3 Various without 12. Rc3
– 12. Rc3 Various without 12... e5
– 12... e5 Various without 13. de5
D69
Queen's Gambit Declined
Orthodox Defence
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 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. d4 Nf6 2. c4 g6 (with 3... d5)
– Various without 3. Nc3
D70
Neo-Grünfeld Defence
1. d4 Nf6 2. c4 g6 (with 3... d5)
– Various without 3. g3, 3. Nc3
D71
Neo-Grünfeld Defence
1. d4 Nf6 2. c4 g6 3. g3 d5
– Various without 4. Bg2
– 4. Bg2 Various without 4... Bg7
– 4... Bg7 Various without 5. cd5, 5. Nf3
– 5. cd5 Various without 5... Nd5
– 5... Nd5 Various without 6. e4
D72
Neo-Grünfeld Defence
1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. cd5 Nd5 6. e4
D73
Neo-Grünfeld Defence
1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. Nf3
– Various without 5... O O
D74
Neo-Grünfeld Defence
1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. Nf3 O O
– Various without 6. cd5, 6. O O
– 6. cd5 Various without 6... Nd5
– 6... Nd5 Various without 7. O O
– 7. O O Various without 7... c5, 7... Nb6
D75
Neo-Grünfeld Defence
1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. Nf3 O O 6. cd5 Nd5 7. O O c5
D76
Neo-Grünfeld Defence
1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. Nf3 O O 6. cd5 Nd5 7. O O Nb6
D77
Neo-Grünfeld Defence
1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. Nf3 O O 6. O O
– Various without 6... c6
D78
Neo-Grünfeld Defence
1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. Nf3 O O 6. O O c6
– Various without 7. cd5
D79
Neo-Grünfeld Defence
1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. Nf3 O O 6. O O c6 7. cd5
D8
1. d4 Nf6 2. c4 g6 3. Nc3 d5
– Various without 4. Nf3
D80
Grünfeld Defence
1. d4 Nf6 2. c4 g6 3. Nc3 d5
– Various without 4. Qb3, 4. Bf4, 4. cd5, 4. Nf3
D81
Grünfeld Defence
Russian Variation
1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Qb3
D82
Grünfeld Defence
1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4
– Various without 4... Bg7
– 4... Bg7 Various without 5. e3
– 5. e3 Various without 5... O O
D83
Grünfeld Defence
1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 O O
– Various without 6. cd5
D84
Grünfeld Defence
1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 O O 6. cd5
D85
Grünfeld Defence
1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cd5
– Various without 4... Nd5
– 4... Nd5 Various without 5. e4
– 5. e4 Various without 5... Nc3
– 5... Nc3 6. bc3 Various without 6... Bg7
– 6... Bg7 Various without 7. Bc4
D86
Grünfeld Defence
Exchange, Classical Variation
1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cd5 Nd5 5. e4 Nc3 6. bc3 Bg7 7. Bc4
– Various without 7... O O
– 7... O O Various without 8. Ne2
– 8. Ne2 Various without 8... c5
D87
Grünfeld Defence
Exchange, Spassky Variation
1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cd5 Nd5 5. e4 Nc3 6. bc3 Bg7 7. Bc4 O O 8. Ne2 c5
– Various without 9. O O
– 9. O O Various without 9... Nc6
– 9... Nc6 Various without 10. Be3
– 10. Be3 Various without 10... cd4
D88
Grünfeld Defence
Spassky Variation
1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cd5 Nd5 5. e4 Nc3 6. bc3 Bg7 7. Bc4 O O 8. Ne2 c5 9. O O Nc6 10. Be3 cd4
– Various without 11. cd4
– 11. cd4 Various without 11... Bg4
– 11... Bg4 Various without 12. f3
– 12. f3 Various without 12... Na5
– 12... Na5 Various without 13. Bd3
D89
Grünfeld Defence
Spassky Variation
1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cd5 Nd5 5. e4 Nc3 6. bc3 Bg7 7. Bc4 O O 8. Ne2 c5 9. O O Nc6 10. Be3 cd4 11. cd4 Bg4 12. f3 Na5 13. Bd3
D9
1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3
D90
Grünfeld Defence
Three Knights Variation
1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3
– Various without 4... Bg7
– 4... Bg7 Various without 5. Bg5, 5. Bf4, 5. e3, 5. Qb3
D91
Grünfeld Defence
Three Knights Variation
1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Bg5
D92
Grünfeld Defence
1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Bf4
– Various without 5... O O
– 5... O O Various without 6. e3
D93
Grünfeld Defence
1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Bf4 O O 6. e3
D94
Grünfeld Defence
1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3
– Various without 5... O O
– 5... O O Various without 6. Qb3
D95
Grünfeld Defence
1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 O O 6. Qb3
D96
Grünfeld Defence
Russian Variation
1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3
– Various without 5... dc4
D97
Grünfeld Defence
Russian Variation
1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dc4
– Various without 6. Qc4
– 6. Qc4 Various without 6... O O
– 6... O O Various without 7. e4
– 7. e4 Various without 7... Bg4
D98
Grünfeld Defence
Russian, Smyslov Variation
1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dc4 6. Qc4 O O 7. e4 Bg4
– Various without 8. Be3
– 8. Be3 Various without 8... Nfd7
– 8... Nfd7 Various without 9. Qb3
D99
Grünfeld Defence
Smyslov Variation
1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dc4 6. Qc4 O O 7. e4 Bg4 8. Be3 Nfd7 9. Qb3
E
1. d4 Nf6 2. c4 e6
1. d4 Nf6 2. c4 g6 º 3... d5
E0
1. d4 Nf6 2. c4 e6
– Various without 3. Nf3, 3. Nc3
E00
Catalan Opening
1. d4 Nf6 2. c4 e6
– Various without 3. g3, 3. Nf3, 3. Nc3
– 3. g3 Various without 3... d5
E01
Catalan Opening
1. d4 Nf6 2. c4 e6 3. g3 d5
– Various without 4. Bg2
– 4. Bg2 Various without 4... dc4, 4... Be7
E02
Catalan Opening
1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dc4
– Various without 5. Qa4, 5. Nf3
– 5. Qa4 Various without 5... Nbd7
– 5... Nbd7 Various without 6. Qc4
E03
Catalan Opening
1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dc4 5. Qa4 Nbd7 6. Qc4
E04
Catalan Opening
Open Variation
1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dc4 5. Nf3
– Various without 5... Be7
E05
Catalan Opening
Open Variation
1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dc4 5. Nf3 Be7
E06
Catalan Opening
Closed Variation
1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7
– Various without 5. Nf3
– 5. Nf3 Various without 5... O O
– 5... O O Various without 6. O O
– 6. O O Various without 6... Nbd7
E07
Catalan Opening
Closed Variation
1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O O 6. O O Nbd7
– Various without 7. Qc2
E08
Catalan Opening
Closed Variation
1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O O 6. O O Nbd7 7. Qc2
– Various without 7... c6
– 7... c6 Various without 8. Nbd2
E09
Catalan Opening
Closed Variation
1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O O 6. O O Nbd7 7. Qc2 c6 8. Nbd2
E1
1. d4 Nf6 2. c4 e6 3. Nf3
E10
Blumenfeld Gambit
1. d4 Nf6 2. c4 e6 3. Nf3
– Various without 3... Bb4, 3... b6
E11
Bogo-Indian Defence
1. d4 Nf6 2. c4 e6 3. Nf3 Bb4
E12
Queen's Indian Defence
1. d4 Nf6 2. c4 e6 3. Nf3 b6
– Various without 4. Nc3, 4. e3, 4. g3
– 4. Nc3 Various without 4... Bb7
– 4... Bb7 Various without 5. Bg5
E13
Queen's Indian Defence
1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Nc3 Bb7 5. Bg5
E14
Queen's Indian Defence
1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. e3
E15
Queen's Indian Defence
1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3
– Various without 4... Bb7
E16
Queen's Indian Defence
Capablanca Variation
1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7
– Various without 5. Bg2
– 5. Bg2 Various without 5... Be7
E17
Queen's Indian Defence
1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7
– Various without 6. O O
– 6. O O Various without 6... O O
– 6... O O Various without 7. Nc3
E18
Queen's Indian Defence
1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O O O O 7. Nc3
– Various without 7... Ne4
– 7... Ne4 Various without 8. Qc2
E19
Queen's Indian Defence
1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O O O O 7. Nc3 Ne4 8. Qc2
E2
1. d4 Nf6 2. c4 e6 3. Nc3
– Various without 3... d5, 3... Bb4
– 3... Bb4 Various without 4. Bg5, 4. Qc2, 4. e3
E20
Nimzo-Indian Defence
1. d4 Nf6 2. c4 e6 3. Nc3
– Various without 3... d5, 3... Bb4
– 3... Bb4 Various without 4. Nf3, 4. Qb3, 4. a3, 4. Bg5, 4. Qc2, 4. e3
E21
Nimzo-Indian Defence
Three Knights Variation
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3
E22
Nimzo-Indian Defence
Spielmann Variation
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qb3
– Various without 4... c5
E23
Nimzo-Indian Defence
Spielmann Variation
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qb3 c5
E24
Nimzo-Indian Defence
Sämisch Variation
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3
– Various without 4... Bc3
– 4... Bc3 5. bc3 Various without 5... c5, 5... O O
E25
Nimzo-Indian Defence
Sämisch Variation
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bc3 5. bc3 c5
– Various without 6. e3
E26
Nimzo-Indian Defence
Sämisch Variation
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bc3 5. bc3 c5 6. e3
E27
Nimzo-Indian Defence
Sämisch Variation
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bc3 5. bc3 O O
– Various without 6. e3
E28
Nimzo-Indian Defence
Sämisch Variation
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bc3 5. bc3 O O 6. e3
– Various without 6... c5
E29
Nimzo-Indian Defence
Sämisch Variation
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bc3 5. bc3 O O 6. e3 c5
E3
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4
– 4. Bg5
– 4. Qc2
E30
Nimzo-Indian Defence
Leningrad Variation
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bg5
– Various without 4... h6
– 4... h6 Various without 5. Bh4
– 5. Bh4 Various without 5... c5
– 5... c5 Various without 6. d5
– 6. d5 Various without 6... d6
E31
Nimzo-Indian Defence
Leningrad Variation
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bg5 h6 5. Bh4 c5 6. d5 d6
E32
Nimzo-Indian Defence
Classical Variation
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2
– Various without 4... Nc6, 4... d5, 4... c5
E33
Nimzo-Indian Defence
Classical Variation
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 Nc6
E34
Nimzo-Indian Defence
Classical Variation
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5
– Various without 5. cd5, 5. a3
– 5. cd5 Various without 5... ed5
E35
Nimzo-Indian Defence
Classical Variation
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cd5 ed5
E36
Nimzo-Indian Defence
Classical Variation
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. a3
– Various without 5... Bc3
– 5... Bc3 Various without 6. Qc3
– 6. Qc3 Various without 6... Ne4
E37
Nimzo-Indian Defence
Classical Variation
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. a3 Bc3 6. Qc3 Ne4
E38
Nimzo-Indian Defence
Classical Variation
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5
– Various without 5. dc5
– 5. dc5 Various without 5... O O
E39
Nimzo-Indian Defence
Classical Variation
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5 5. dc5 O O
E4
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3
– Various without 4... O O
– 4... O O Various without 5. Nf3
E40
Nimzo-Indian Defence
Rubinstein Variation
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3
– Various without 4... c5, 4... b6, 4... O O
E41
Nimzo-Indian Defence
Rubinstein Variation
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5
– Various without 5. Ne2
E42
Nimzo-Indian Defence
Rubinstein Variation
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Ne2
E43
Nimzo-Indian Defence
Rubinstein Variation
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6
– Various without 5. Ne2
E44
Nimzo-Indian Defence
Rubinstein Variation
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Ne2
– Various without 5... Ba6
E45
Nimzo-Indian Defence
Rubinstein Variation
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Ne2 Ba6
E46
Nimzo-Indian Defence
Rubinstein Variation
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O O
– Various without 5. Bd3, 5. Nf3
E47
Nimzo-Indian Defence
Rubinstein Variation
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O O 5. Bd3
– Various without 5... d5
E48
Nimzo-Indian Defence
Rubinstein Variation
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O O 5. Bd3 d5
– Various without 6. a3
E49
Nimzo-Indian Defence
Rubinstein Variation
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O O 5. Bd3 d5 6. a3
E5
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O O 5. Nf3
E50
Nimzo-Indian Defence
Rubinstein Variation
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O O 5. Nf3
– Various without 5... d5
E51
Nimzo-Indian Defence
Rubinstein Variation
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O O 5. Nf3 d5
– Various without 6. Bd3
– 6. Bd3 Various without 6... b6, 6... c5
E52
Nimzo-Indian Defence
Rubinstein Variation
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O O 5. Nf3 d5 6. Bd3 b6
E53
Nimzo-Indian Defence
Rubinstein Variation
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O O 5. Nf3 d5 6. Bd3 c5
– Various without 7. O O
– 7. O O Various without 7... dc4, 7... Nc6
E54
Nimzo-Indian Defence
Rubinstein Variation
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O O 5. Nf3 d5 6. Bd3 c5 7. O O dc4 8. Bc4
– Various without 8... Nbd7
E55
Nimzo-Indian Defence
Rubinstein Variation
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O O 5. Nf3 d5 6. Bd3 c5 7. O O dc4 8. Bc4 Nbd7
E56
Nimzo-Indian Defence
Rubinstein Variation
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O O 5. Nf3 d5 6. Bd3 c5 7. O O Nc6
– Various without 8. a3
– 8. a3 Various without 8... dc4, 8... Bc3
– 8... dc4 Various without 9. Bc4
– 9. Bc4 Various without 9... cd4
E57
Nimzo-Indian Defence
Rubinstein Variation
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O O 5. Nf3 d5 6. Bb3 c5 7. O O Nc6 8. a3 dc4 9. Bc4 cd4
E58
Nimzo-Indian Defence
Rubinstein Variation
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O O 5. Nf3 d5 6. Bd3 c5 7. O O Nc6 8. a3 Bc3 9. bc3
– Various without 9... dc4
E59
Nimzo-Indian Defence
Rubinstein Variation
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O O 5. Nf3 d5 6. Bd3 c5 7. O O Nc6 8. a3 Bc3 9. bc3 dc4 10. Bc4
E6
1. d4 Nf6 2. c4 g6 (º 3... d5)
– Various without 3. Nc3
– 3. Nc3 Various without 3... d5, 3... Bg7
– 3... Bg7 Various without 4. e4
E60
King's Indian Defence
1. d4 Nf6 2. c4 g6
– Various without 3. Nc3
E61
King's Indian Defence
1. d4 Nf6 2. c4 g6 3. Nc3
– Various without 3... d5, 3... Bg7
– 3... Bg7 Various without 4. Nf3, 4. e4
– 4. Nf3 Various without 4... O O
– 4... O O Various without 5. g3
E62
King's Indian Defence
Fianchetto Variation
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 O O 5. g3
– Various without 5... d6
– 5... d6 Various without 6. Bg2
– 6. Bg2 Various without 6... Nc6, 6... c5, 6... Nbd7
E63
King's Indian Defence
Fianchetto Variation
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 O O 5. g3 d6 6. Bg2 Nc6
E64
King's Indian Defence
Fianchetto Variation
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 O O 5. g3 d6 6. Bg2 c5
– Various without 7. O O
E65
King's Indian Defence
Fianchetto Variation
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 O O 5. g3 d6 6. Bg2 c5 7. O O
– Various without 7... Nc6
– 7... Nc6 Various without 8. d5
E66
King's Indian Defence
Fianchetto Variation
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 O O 5. g3 d6 6. Bg2 c5 7. O O Nc6 8. d5
E67
King's Indian Defence
Fianchetto Variation
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 O O 5. g3 d6 6. Bg2 Nbd7
– Various without 7. O O
– 7. O O Various without 7... e5
– 7... e5 Various without 8. e4
E68
King's Indian Defence
Fianchetto Variation
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 O O 5. g3 d6 6. Bg2 Nbd7 7. O O e5 8. e4
– Various without 8... c6
– 8... c6 Various without 9. h3
E69
King's Indian Defence
Fianchetto Variation
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 O O 5. g3 d6 6. Bg2 Nbd7 7. O O e5 8. e4 c6 9. h3
E7
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4
– Various without 4... d6
– 4... d6 Various without 5. f3, 5. Nf3
E70
King's Indian Defence
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4
– Various without 4... d6
– 4... d6 Various without 5. h3, 5. g3, 5. Be2, 5. f4, 5. f3, 5. Nf3
E71
King's Indian Defence
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. h3
E72
King's Indian Defence
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. g3
E73
King's Indian Defence
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2
– Various without 5... O O
– 5... O O Various without 6. Bg5
– 6. Bg5 Various without 6... c5
E74
King's Indian Defence
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O O 6. Bg5 c5
– Various without 7. d5
– 7. d5 Various without 7... e6
E75
King's Indian Defence
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O O 6. Bg5 c5 7. d5 e6
E76
King's Indian Defence
Four Pawns Attack
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4
– Various without 5... O O
– 5... O O Various without 6. Be2
E77
King's Indian Defence
Four Pawns Attack
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 O O 6. Be2
– Various without 6... c5
– 6... c5 Various without 7. Nf3
E78
King's Indian Defence
Four Pawns Attack
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 O O 6. Be2 c5 7. Nf3
– Various without 7... cd4
– 7... cd4 Various without 8. Nd4
– 8. Nd4 Various without 8... Nc6
E79
King's Indian Defence
Four Pawns Attack
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 O O 6. Be2 c5 7. Nf3 cd4 8. Nd4 Nc6
E8
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3
E80
King's Indian Defence
Sämisch Variation
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3
– Various without 5... O O
E81
King's Indian Defence
Sämisch Variation
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O O
– Various without 6. Be3
– 6. Be3 Various without 6... b6, 6... Nc6, 6... e5
E82
King's Indian Defence
Sämisch Variation
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O O 6. Be3 b6
E83
King's Indian Defence
Sämisch Variation
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O O 6. Be3 Nc6
– Various without 7. Nge2
– 7. Nge2 Various without 7... a6
– 7... a6 Various without 8. Qd2
– 8. Qd2 Various without 8... Rb8
E84
King's Indian Defence
Sämisch Variation
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O O 6. Be3 Nc6 7. Nge2 a6 8. Qd2 Rb8
E85
King's Indian Defence
Sämisch Variation
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O O 6. Be3 e5
– Various without 7. Nge2, 7. d5
– 7. Nge2 Various without 7... c6
E86
King's Indian Defence
Sämisch Variation
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O O 6. Be3 e5 7. Nge2 c6
E87
King's Indian Defence
Sämisch Variation
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O O 6. Be3 e5 7. d5
– Various without 7... c6
E88
King's Indian Defence
Sämisch Variation
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O O 6. Be3 e5 7. d5 c6
– Various without 8. Nge2
E89
King's Indian Defence
Sämisch Variation
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O O 6. Be3 e5 7. d5 c6 8. Nge2
E9
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3
E90
King's Indian Defence
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3
– Various without 5... O O
– 5... O O Various without 6. Be2
E91
King's Indian Defence
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O O 6. Be2
– Various without 6... e5
E92
King's Indian Defence
Classical Variation
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O O 6. Be2 e5
– Various without 7. d5, 7. O O
– 7. d5 Various without 7... Nbd7
E93
King's Indian Defence
Petrosian System
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O O 6. Be2 e5 7. d5 Nbd7
E94
King's Indian Defence
Orthodox Variation
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O O 6. Be2 e5 7. O O
– Various without 7... Nbd7, 7... Nc6
E95
King's Indian Defence
Orthodox Variation
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O O 6. Be2 e5 7. O O Nbd7
– Various without 8. Re1
E96
King's Indian Defence
Orthodox Variation
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O O 6. Be2 e5 7. O O Nbd7 8. Re1
E97
King's Indian Defence
Orthodox Variation
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O O 6. Be2 e5 7. O O Nc6
– Various without 8. d5
– 8. d5 Various without 8... Ne7
– 8... Ne7 Various without 9. Ne1
E98
King's Indian Defence
Orthodox Variation
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O O 6. Be2 e5 7. O O Nc6 8. d5 Ne7 9. Ne1
– Various without 9... Nd7
– 9... Nd7 Various without 10. f3
E99
King's Indian Defence
Orthodox Variation
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O O 6. Be2 e5 7. O O Nc6 8. d5 Ne7 9. Ne1 Nd7 10. f3