Dutch Defense: Leningrad Variation, Carlsbad Variation

The Dutch Defense: Leningrad Variation, Carlsbad Variation is a chess opening classified under ECO code A81 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 f5 2. g3 g6 3. Bg2 Bg7 4. Nh3. The resulting position leaves black to move.