ECO A01

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

12 named opening lines are classified under ECO code A01.

• Nimzo-Larsen Attack — 1.b3
• Nimzo-Larsen Attack: Classical Variation — 1.b3 d5
• Nimzo-Larsen Attack: Dutch Variation — 1.b3 f5
• Nimzo-Larsen Attack: English Variation — 1.b3 c5
• Nimzo-Larsen Attack: Graz Attack — 1.b3 d5 2.Ba3
• Nimzo-Larsen Attack: Indian Variation — 1.b3 Nf6
• Nimzo-Larsen Attack: Modern Variation — 1.b3 e5
• Nimzo-Larsen Attack: Pachman Gambit — 1.b3 e5 2.Bb2 Nc6 3.f4
• Nimzo-Larsen Attack: Polish Variation — 1.b3 b5
• Nimzo-Larsen Attack: Ringelbach Gambit — 1.b3 f5 2.Bb2 e6 3.e4
• Nimzo-Larsen Attack: Spike Variation — 1.b3 Nf6 2.Bb2 g6 3.g4
• Nimzo-Larsen Attack: Symmetrical Variation — 1.b3 b6