ECO A03

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 A03.

• Bird Opening: Dutch Variation — 1.f4 d5
• Bird Opening: Dutch Variation, Dudweiler Gambit — 1.f4 d5 2.g4
• Bird Opening: Lasker Variation — 1.f4 d5 2.Nf3 Nf6 3.e3 c5
• Bird Opening: Sturm Gambit — 1.f4 d5 2.c4
• Bird Opening: Thomas Gambit — 1.f4 d5 2.b3 Nf6 3.Bb2 d4 4.Nf3 c5 5.e3
• Bird Opening: Williams Gambit — 1.f4 d5 2.e4
• Bird Opening: Williams-Zilbermints Gambit — 1.f4 d5 2.e4 dxe4 3.Nc3 Nf6 4.Nge2