A13: English, Neo-Catalan accepted

A13 Sub-variants:

• English opening
  1. c4 e6
• English, Romanishin gambit
  1. c4 e6 2. Nf3 Nf6 3. g3 a6 4. Bg2 b5
• English opening, Agincourt variation
  1. c4 e6 2. Nf3 d5
• English, Wimpey system
  1. c4 e6 2. Nf3 d5 3. b3 Nf6 4. Bb2 c5 5. e3
• English opening, Agincourt variation
  1. c4 e6 2. Nf3 d5 3. g3
• English, Kurajica defence
  1. c4 e6 2. Nf3 d5 3. g3 c6
• English, Neo-Catalan
  1. c4 e6 2. Nf3 d5 3. g3 Nf6
• English, Neo-Catalan accepted
  1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 dxc4