ECO A03
7 named openings and variations are classified as A03. ECO (Encyclopaedia of Chess Openings) codes group openings from A00 to E99 by their opening moves.
- Bird Opening: Dutch VariationA031. f4 d5
- Bird Opening: Dutch Variation, Dudweiler GambitA031. f4 d5 2. g4
- Bird Opening: Lasker VariationA031. f4 d5 2. Nf3 Nf6 3. e3 c5
- Bird Opening: Sturm GambitA031. f4 d5 2. c4
- Bird Opening: Thomas GambitA031. f4 d5 2. b3 Nf6 3. Bb2 d4 4. Nf3 c5 5. e3
- Bird Opening: Williams GambitA031. f4 d5 2. e4
- Bird Opening: Williams-Zilbermints GambitA031. f4 d5 2. e4 dxe4 3. Nc3 Nf6 4. Nge2