English Opening: King's English Variation, Nimzowitsch-Flohr Variation

The English Opening: King's English Variation, Nimzowitsch-Flohr Variation is a chess opening classified under ECO code A20 in the Flank Openings family, characterized by moves like 1.c4, 1.Nf3, or 1.f4, aiming to control the center indirectly. It is reached after 2 moves: 1. c4 e5 2. Nf3 e4. The resulting position leaves white to move.