A
- 1. R' 1. e4, 1. d4
Irregular openings.
- 1. d4 R' 1 ...d5, 1... Nf6
Untypical replies to 1.d4
- 1. d4 Nf6 2. R' 2. c4
Untypical replies to 1...Nf6
- 1. d4 Nf6 2. c4 R' 2... e6, 2... g6
Untypical Indian systems.
Main ECO codes for each class
Full ECO codes
A
- 1. R' 1. e4, 1. d4
Irregular openings.
- 1. d4 R' 1 ...d5, 1... Nf6
Untypical replies to 1.d4
- 1. d4 Nf6 2. R' 2. c4 (humongous typo on (c) page!)
Untypical replies to 1...Nf6
- 1. d4 Nf6 2. c4 R' 2... e6, 2... g6
Untypical Indian systems.
A0
1. R' 1. e4, 1. d4, 1. c4
Irregular openings.
A00
1. R,
1. g3,
1. b4
Irregular Openings,
Benko Opening,
Sokolsky (Polish Opening)
A01
1. b3
Nimzo-Larsen Attack
A02
1. f4
Bird's Opening
A03
1. f4 d5
Bird's Opening
A04
1. Nf3
Reti Opening
A05
1. Nf3 Nf6
Reti Opening with 1...Nf6
A06
1. Nf3 d5
Reti Opening with 1...d5
A07
1. Nf3 d5 2. g3
Reti Opening, Barcza System
A08
1. Nf3 d5 2. g3 c5 3. Bg2
Reti Opening, Barcza System
A09
1. Nf3 d5 2. c4
Reti Opening
A1
1. c4
English Opening
A10
1 c4
English Opening
A11
1 c4 c6
English Opening, systems with 1...e6
A12
1 c4 c6 2. Nf3 d5 3. b3
(Reti Opening)
A13
1 c4 e6
English Opening, systems with 1...e6
A14
1 c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Be7 5. O-O
(Reti Opening)
A15
1 c4 Nf6
English Opening, systems with 1...Nf6
A16
1 c4 Nf6 2. Nc3
English Opening, systems with 1...Nf6
A17
1 c4 Nf6 2. Nc3 e6
English Opening, Anglo-Indian
A18
1 c4 Nf6 2. Nc3 e6 3. e4
Flohr-Mikenas Variation
A19
1 c4 Nf6 2. Nc3 e6 3. e4 c5
Flohr-Mikenas Variation
A2
1. c4 e5
English Opening with 1...e5 (King's English, or Reversed Sicilian)
A20
1. c4 e5
English Opening, Reversed Sicilian
A21
1. c4 e5 2. Nc3
English Opening, Reversed Sicilian
A22
1. c4 e5 2. Nc3 Nf6
English Opening, Reversed Sicilian
A23
1. c4 e5 2. Nc3 Nf6 3. g3 c6
English Opening, Reversed Sicilian
A24
1. c4 e5 2. Nc3 Nf6 3. g3 g6
English Opening, Reversed Sicilian
A25
1. c4 e5 2. Nc3 Nc6
English Opening, Reversed Sicilian, Closed Systems
A26
1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6
English Opening, Reversed Sicilian, Closed Systems
A27
1. c4 e5 2. Nc3 Nc6 3. Nf3
English Opening, Reversed Sicilian, Closed Systems
A28
1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6
English Opening, Reversed Sicilian, Four Knights' Variation
A29
1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6 4. g3
English Opening, Reversed Sicilian, Four Knights' Variation
A3
1. c4 c5
Symmetrical English
A30
1. c4 c5
Symmetrical English
A31
1. c4 c5 2. Nf3 Nf6 3. d4
Symmetrical English
A32
1. c4 c5 2. Nf3 Nf6 3. d4 cd4 4. Nd4 e6
Symmetrical English
A33
1. c4 c5 2. Nf3 Nf6 3. d4 cd4 4. Nd4 e6 5. Nc3 Nc6
Symmetrical English
A34
1. c4 c5 2. Nc3
Symmetrical English
A35
1. c4 c5 2. Nc3 Nc6
Symmetrical English, Closed systems
A36
1. c4 c5 2. Nc3 Nc6 3. g3
Symmetrical English, Closed systems
A37
1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3
Symmetrical English, Closed systems
A38
1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 Nf6
Symmetrical English, Closed systems
A39
1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 Nf6 6. O-O O-O 7. d4
English Opening, Maroczy Bind
A4
1. d4
Queen Pawn games
A40
1. d4
Queen Pawn games
A41
1. d4 d6
Queen Pawn games, systems with 1...d6
A42
1. d4 d6 2. c4 g6 3. Nc3 Bg7 4. e4
Modern Defence, Averbakh Variation
A43
1. d4 c5
Benoni
A44
1. d4 c5 2. d5 e5
Old Benoni (...g6) or Czech Benoni (...Be7)
A45
1. d4 Nf6
Indian systems
A46
1. d4 Nf6 2. Nf3
Indian systems with 2. Nf3
A47
1. d4 Nf6 2. Nf3 b6
Indian systems with 2. Nf3
A48
1. d4 Nf6 2. Nf3 g6
Indian systems with 2. Nf3
A49
1. d4 Nf6 2. Nf3 g6 3. g3
Indian systems with 2. Nf3
A5
1. d4 Nf6 2. c4
Indian systems
A50
1. d4 Nf6 2. c4
Indian systems with 2. c4
A51
1. d4 Nf6 2. c4 e5
Budapest Gambit
A52
1. d4 Nf6 2. c4 e5 3. de5 Ng4
Budapest Gambit, main line accepted
A53
1. d4 Nf6 2. c4 d6
Old Indian Defence
A54
1. d4 Nf6 2. c4 d6 3. Nc3 e5 4. Nf3
Old Indian Defence
A55
1. d4 Nf6 2. c4 d6 3. Nc3 e5 4. Nf3 Nbd7 5. e4
Old Indian Defence
A56
1. d4 Nf6 2. c4 c5
Benoni Defence
A57
1. d4 Nf6 2. c4 c5 3. d5 b5
Benko Gambit
A58
1. d4 Nf6 2. c4 c5 3. d5 b5 4. cb5 a6 5. ba6
Benko Gambit Accepted
A59
1. d4 Nf6 2. c4 c5 3. d5 b5 4. cb5 a6 5. ba6 Ba6 6. Nc3 d6 7. e4
Benko Gambit Accepted, Classical Variation
A6
1. d4 Nf6 2. c4 c5 3. d5 e6
Modern Benoni
A60
1. d4 Nf6 2. c4 c5 3. d5 e6
Modern Benoni
A61
1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 ed5 5. cd5 d6 6. Nf3 g6
Modern Benoni
A62
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
Modern Benoni, Fianchetto Variation
A63
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 8. Bg2 O-O 9. O-O Nbd7
Modern Benoni, Fianchetto Variation
A64
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 8. Bg2 O-O 9. O-O Nbd7 10. Nd2 a6 11. a4 Re8
Modern Benoni, Fianchetto Variation
A65
1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 ed5 5. cd5 d6 6. e4
Modern Benoni, Main Variation
A66
1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 ed5 5. cd5 d6 6. e4 g6 7. f4
Modern Benoni, Four Pawns (Mikenas) Attack
A67
1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 ed5 5. cd5 d6 6. e4 g6 7. f4 Bg7 8. Bb5
Modern Benoni, Bishop Check Variation (Taimanov)
A68
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
Modern Benoni, Four Pawns (Mikenas) Attack
A69
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
Modern Benoni, Four Pawns (Mikenas) Attack
A7
1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 ed5 5. cd5 d6 6. e4 g6 7. Nf3
Modern Benoni, Classical variation
A70
1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 ed5 5. cd5 d6 6. e4 g6 7. Nf3
Modern Benoni, Classical Variation
A71
1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 ed5 5. cd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2
Modern Benoni, Classical Variation
A72
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
Modern Benoni, Classical Variation
A73
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
Modern Benoni, Classical Variation
A74
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
Modern Benoni, Classical Variation
A75
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
Modern Benoni, Classical Variation
A76
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
Modern Benoni, Classical Variation
A77
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
Modern Benoni, Classical Variation
A78
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
Modern Benoni, Classical Variation
A79
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 Nc7
Modern Benoni, Classical Variation
A8
1. d4 f5
Dutch Defence
A80
1. d4 f5
Dutch Defence
A81
1. d4 f5 2. g3
Dutch Defence
A82
1. d4 f5 2. e4
Dutch Defence, Staunton Gambit
A83
1. d4 f5 2. e4 fe4 3. Nc3 Nf6 4. Bg5
Dutch Defence, Staunton Gambit
A84
1. d4 f5 2. c4
Dutch Defence
A85
1. d4 f5 2. c4 Nf6 3. Nc3
Dutch Defence
A86
1. d4 f5 2. c4 Nf6 3. g3
Dutch Defence
A87
1. d4 f5 2. c4 Nf6 3. g3 g6 4. Bg2 Bg7 5. Nf3
Dutch Defence, Leningrad Variation
A88
1. d4 f5 2. c4 Nf6 3. g3 g6 4. Bg2 Bg7 5. Nf3 O-O 6. O-O d6 7. Nc3 c6
Dutch Defence, Leningrad Variation
A89
1. d4 f5 2. c4 Nf6 3. g3 g6 4. Bg2 Bg7 5. Nf3 O-O 6. O-O d6 7. Nc3 Nc6
Dutch Defence, Leningrad Variation
A9
1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2
Dutch Defence, Classical variation
A90
1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2
Dutch Defence, Classical Variation
A91
1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7
Dutch Defence, Classical Variation
A92
1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O
Dutch Defence, Classical Variation
A93
1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d5 7. b3
Dutch Defence, Stonewall Variation
A94
1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d5 7. b3 c6 8. Ba3
Dutch Defence, Stonewall Variation
A95
1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d5 7. Nc3 c6
Dutch Defence, Stonewall Variation
A96
1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6
Dutch Defence, Iljin-Zhenevsky Variation
A97
1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6 7. Nc3 Qe8
Dutch Defence, Iljin-Zhenevsky Variation
A98
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
Dutch Defence, Iljin-Zhenevsky Variation
A99
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
Dutch Defence, Iljin-Zhenevsky Variation