A28 - 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. d3 - English Opening: King's English Variation, Four Knights Variation, Flexible Line

English Opening: King’s English Variation, Four Knights Variation, Flexible Line (A28)

Coups: 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. d3