Code ECO A13 – English Opening

Coups: 1. c4 e6

├── 1. c4 e6 2. g3 d5 3. Bg2 ... (1)
│   └── A13 - 1. c4 e6 2. Nf3 d5 - English Opening: Agincourt Defense (1)
├── A13 - 1. c4 e6 2. g3 - English Opening: Agincourt Defense, Bogoljubow Defense (7)
├── A13 - 1. c4 e6 2. g3 Nf6 - English opening (1)
├── A13 - 1. c4 e6 2. Nc3 - English Opening: Agincourt Defense (3)
├── A13 - 1. c4 e6 2. Nf3 d5 3. g3 Nf6 - English Opening: Neo-Catalan (8)
├── A13 - 1. c4 e6 2. Nf3 Nf6 3. b3 d5 4. Bb2 c5 5. e3 - English Opening: Agincourt Defense, Wimpy System (1)
└── A13 - 1. c4 e6 2. Nf3 Nf6 3. g3 d5 4. Bg2 dxc4 - English Opening: Agincourt Defense, Catalan Defense Accepted (3)