ECO A50
7 named openings and variations are classified as A50. ECO (Encyclopaedia of Chess Openings) codes group openings from A00 to E99 by their opening moves.
- Indian Defense: Medusa GambitA501. d4 Nf6 2. c4 g5
- Indian Defense: Normal VariationA501. d4 Nf6 2. c4
- Indian Defense: Pyrenees GambitA501. d4 Nf6 2. c4 b5
- Mexican DefenseA501. d4 Nf6 2. c4 Nc6
- Mexican Defense: Horsefly GambitA501. d4 Nf6 2. c4 Nc6 3. d5 Ne5 4. f4
- Queen's Indian AcceleratedA501. d4 Nf6 2. c4 b6
- Slav IndianA501. d4 Nf6 2. c4 c6