Réti Opening: Anglo-Slav Variation, New York System

The Réti Opening: Anglo-Slav Variation, New York System is a chess opening classified under ECO code A12 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. Nf3 Nf6 2. c4 c6 3. b3 d5 4. Bb2 Bf5. The resulting position leaves white to move.