A02: Bird, From gambit

A02 Sub-variants:

• Bird's opening
  1. f4
• Bird, From gambit
  1. f4 e5
• Bird, From gambit, Lasker variation
  1. f4 e5 2. fxe5 d6 3. exd6 Bxd6 4. Nf3 g5
• Bird, From gambit, Lipke variation
  1. f4 e5 2. fxe5 d6 3. exd6 Bxd6 4. Nf3 Nh6 5. d4
• Bird's opening, Swiss gambit
  1. f4 f5 2. e4 fxe4 3. Nc3 Nf6 4. g4
• Bird, Hobbs gambit
  1. f4 g5