ECO A41
ECO A00–A99 — Flank openings: 1.c4, 1.Nf3, 1.f4 and other first moves, plus early Indian and Benoni systems.
9 named opening lines are classified under ECO code A41.
- Modern Defense: Neo-Modern Defense — 1.d4 g6 2.c4 Bg7 3.e4 e5
- Old Indian Defense — 1.d4 d6 2.c4
- Queen's Pawn Game: Rossolimo Variation — 1.d4 d6 2.Nf3 g6
- Rat Defense: English Rat — 1.d4 d6 2.c4 e5
- Rat Defense: English Rat, Lisbon Gambit — 1.d4 d6 2.c4 e5 3.dxe5 Nc6
- Rat Defense: English Rat, Pounds Gambit — 1.d4 d6 2.c4 e5 3.dxe5 Be6
- Robatsch Defense: Rossolimo Variation — 1.d4 d6 2.Nf3 g6 3.c4 Bg7 4.e4 Bg4
- Wade Defense — 1.d4 d6 2.Nf3 Bg4
- Zukertort Opening: Wade Defense, Chigorin Plan — 1.d4 d6 2.Nf3 Bg4 3.c4 Nd7 4.Qb3 Rb8