Indian Defense: Budapest Defense, Fajarowicz Defense, Bonsdorf Variation

The Indian Defense: Budapest Defense, Fajarowicz Defense, Bonsdorf Variation is a chess opening classified under ECO code A51 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. d4 Nf6 2. c4 e5 3. dxe5 Ne4 4. a3 b6. The resulting position leaves white to move.