English Opening: Anglo-Indian Defense, Anglo-Grünfeld Variation

The English Opening: Anglo-Indian Defense, Anglo-Grünfeld Variation is a chess opening classified under ECO code A16 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 4 moves: 1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. Nf3. The resulting position leaves black to move.