ECO A13
11 named openings and variations are classified as A13. ECO (Encyclopaedia of Chess Openings) codes group openings from A00 to E99 by their opening moves.
- English Opening: Agincourt DefenseA131. c4 e6
- English Opening: Agincourt Defense, Bogoljubow DefenseA131. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Bd6
- English Opening: Agincourt Defense, Catalan DefenseA131. c4 e6 2. Nf3 d5 3. g3 c5
- English Opening: Agincourt Defense, Catalan Defense AcceptedA131. c4 e6 2. Nf3 Nf6 3. g3 d5 4. Bg2 dxc4
- English Opening: Agincourt Defense, Catalan Defense, Semi-Slav DefenseA131. c4 e6 2. Nf3 Nf6 3. g3 d5 4. Bg2 c6
- English Opening: Agincourt Defense, Kurajica DefenseA131. c4 e6 2. Nf3 d5 3. g3 c6
- English Opening: Agincourt Defense, Tarrasch DefenseA131. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 c5 5. b3 Nc6 6. O-O Be7
- English Opening: Agincourt Defense, Wimpy SystemA131. c4 e6 2. Nf3 Nf6 3. b3 d5 4. Bb2 c5 5. e3
- English Opening: Neo-CatalanA131. c4 e6 2. Nf3 d5 3. g3 Nf6
- English Opening: Neo-Catalan DeclinedA131. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Be7
- English Opening: Romanishin GambitA131. c4 Nf6 2. Nf3 e6 3. g3 a6 4. Bg2 b5