ECO A56

ECO A00–A99 — Flank openings: 1.c4, 1.Nf3, 1.f4 and other first moves, plus early Indian and Benoni systems.

7 named opening lines are classified under ECO code A56.

• Benoni Defense — 1.d4 Nf6 2.c4 c5
• Benoni Defense: Czech Benoni Defense — 1.d4 Nf6 2.c4 c5 3.d5 e5
• Benoni Defense: Hromádka System — 1.d4 Nf6 2.c4 c5 3.d5 d6
• Benoni Defense: King's Indian System — 1.d4 Nf6 2.c4 c5 3.d5 e5 4.Nc3 d6 5.e4 g6
• Benoni Defense: Weenink Variation — 1.d4 Nf6 2.c4 c5 3.dxc5 e6
• Grünfeld Defense: Three Knights Variation, Burille Variation, Reversed Tarrasch — 1.d4 Nf6 2.c4 c5 3.e3 g6 4.Nc3 Bg7 5.Nf3 O-O 6.Be2 cxd4 7.exd4 d5 8.O-O Nc6
• Vulture Defense — 1.d4 Nf6 2.c4 c5 3.d5 Ne4