Marienbad System: Berg Variation

The Marienbad System: Berg Variation is a chess opening classified under ECO code A47 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 6 moves: 1. d4 Nf6 2. Nf3 b6 3. g3 Bb7 4. Bg2 c5 5. c4 cxd4 6. Qxd4. The resulting position leaves black to move.