├── A50 - 1. d4 Nf6 2. c4 - Indian Defense: Normal Variation (6) ├── A50 - 1. d4 Nf6 2. c4 c6 - Slav Indian (2) ├── A50 - 1. d4 Nf6 2. c4 Nc6 - Mexican Defense (0) ├── A51 - 1. d4 Nf6 2. c4 e5 - Indian Defense (0) ├── A52 - 1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 - Indian Defense: Budapest Defense (0) ├── A53 - 1. d4 Nf6 2. c4 d6 - Old Indian Defense (0) │ ├── A53 - 1. d4 Nf6 2. c4 d6 3. Nc3 Bf5 - Old Indian Defense: Janowski Variation (0) │ ├── A53 - 1. d4 Nf6 2. c4 d6 3. Nc3 c6 - Old Indian Defense: Czech Variation, with Nc3 (0) │ └── A53 - 1. d4 Nf6 2. c4 d6 3. Nf3 c6 - Old Indian Defense: Czech Variation, with Nf3 (0) ├── A53 - 1. d4 Nf6 2. c4 d6 3. Nf3 g6 4. g3 Bg7 - Old Indian Defense (1) ├── A54 - 1. d4 Nf6 2. c4 d6 3. Nc3 e5 - Old Indian Defense: Ukrainian Variation (0) │ └── A54 - 1. d4 Nf6 2. c4 d6 3. Nc3 e5 4. Nf3 - Old Indian Defense: Two Knights Variation (0) ├── A54 - 1. d4 Nf6 2. c4 d6 3. Nc3 e5 4. e3 Nbd7 5. Bd3 - Old Indian Defense: Duz-Khotimirsky Variation (0) ├── A55 - 1. d4 Nf6 2. c4 d6 3. Nc3 Nbd7 4. e4 e5 5. Nf3 - Old Indian Defense: Normal Variation (0) ├── A56 - 1. d4 Nf6 2. c4 c5 - Benoni Defense (1) │ ├── A56 - 1. d4 Nf6 2. c4 c5 3. d5 d6 - Benoni Defense: Hromádka System (0) │ ├── A56 - 1. d4 Nf6 2. c4 c5 3. d5 e5 - Benoni Defense: Czech Benoni Defense (0) │ ├── A56 - 1. d4 Nf6 2. c4 c5 3. d5 g6 4. Nc3 Bg7 5. e4 d6 6. Nf3 - Benoni Defense (1) │ └── A56 - 1. d4 Nf6 2. c4 c5 3. dxc5 e6 - Benoni Defense: Weenink Variation (0) ├── A57 - 1. d4 Nf6 2. c4 c5 3. d5 b5 - Benko Gambit (3) │ ├── A57 - 1. d4 Nf6 2. c4 c5 3. d5 b5 4. a4 - Benko Gambit Declined: Sosonko Variation (0) │ ├── A57 - 1. d4 Nf6 2. c4 c5 3. d5 b5 4. Bg5 - Benko Gambit Declined: Bishop Attack (0) │ ├── A57 - 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 - Benko Gambit Accepted (0) │ ├── A57 - 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. b6 - Benko Gambit Accepted: Pawn Return Variation (0) │ ├── A57 - 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. e3 - Benko Gambit Accepted: Modern Variation (3) │ ├── A57 - 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. f3 - Benko Gambit Accepted: Dlugy Variation (0) │ ├── A57 - 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. Nc3 - Benko Gambit: Zaitsev System (0) │ ├── A57 - 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. Nc3 axb5 6. e4 b4 7. Nb5 - Benko Gambit: Zaitsev Variation, Nescafe Frappe Attack (0) │ ├── A57 - 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. Nc3 axb5 6. e4 b4 7. Nb5 d6 8. Bc4 - Benko Gambit: Nescafe Frappe Attack (0) │ ├── A57 - 1. d4 Nf6 2. c4 c5 3. d5 b5 4. e4 - Benko Gambit Declined: Hjørring Countergambit (0) │ ├── A57 - 1. d4 Nf6 2. c4 c5 3. d5 b5 4. f3 - Benko Gambit Declined: Pseudo-Sämisch (0) │ └── A57 - 1. d4 Nf6 2. c4 c5 3. d5 b5 4. Nd2 - Benko Gambit Declined: Quiet Line (0) ├── A57 - 1. d4 Nf6 2. c4 c5 3. d5 b5 4. Nf3 - Benko Gambit Declined: Main Line (0) ├── A58 - 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 - Benko Gambit Accepted: Fully Accepted Variation (0) └── A59 - 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 Bxa6 6. Nc3 d6 7. e4 - Benko Gambit Accepted: Yugoslav (0)
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A50 - 1. d4 Nf6 2. c4 - Indian Defense: Normal Variation (6)
Indian Defense: Normal Variation Coups: 1. d4 Nf6 2. c4 -
A50 - 1. d4 Nf6 2. c4 c6 - Slav Indian (2)
Slav Indian Coups: 1. d4 Nf6 2. c4 c6 -
A53 - 1. d4 Nf6 2. c4 d6 3. Nf3 g6 4. g3 Bg7 - Old Indian Defense (1)
Old Indian Defense -
A56 - 1. d4 Nf6 2. c4 c5 - Benoni Defense (1)
Code ECO A56 - Benoni Defense Coups: 1. d4 Nf6 2. c4 c5 -
A57 - 1. d4 Nf6 2. c4 c5 3. d5 b5 - Benko Gambit (3)
Benko Gambit Coups: 1. d4 Nf6 2. c4 c5 3. d5 b5





