ECO A09

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 A09.

• Réti Opening — 1.Nf3 d5 2.c4
• Réti Opening: Advance Variation — 1.Nf3 d5 2.c4 d4
• Réti Opening: Advance Variation, Michel Gambit — 1.Nf3 d5 2.c4 d4 3.b4 c5
• Réti Opening: Advance Variation, Navara Gambit — 1.Nf3 d5 2.c4 d4 3.b4 g5
• Réti Opening: Penguin Variation — 1.Nf3 d5 2.c4 d4 3.Rg1
• Réti Opening: Reversed Blumenfeld Gambit — 1.Nf3 d5 2.c4 d4 3.e3 c5 4.b4
• Réti Opening: Réti Accepted — 1.Nf3 d5 2.c4 dxc4
• Réti Opening: Réti Gambit, Keres Variation — 1.Nf3 d5 2.c4 dxc4 3.e3 Be6
• Réti Opening: Zilbermints Gambit — 1.Nf3 d5 2.c4 b5