Queen's Gambit Declined: Lasker Defense, Bernstein Variation, Mar del Plata Gambit

The Queen's Gambit Declined: Lasker Defense, Bernstein Variation, Mar del Plata Gambit is a chess opening classified under ECO code D57 in the Closed & Semi-Closed Games family, arising from 1.d4 d5, including the Queen's Gambit, Slav Defense, and related systems. It is reached after 12 moves: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 h6 7. Bh4 Ne4 8. Bxe7 Qxe7 9. cxd5 Nxc3 10. bxc3 exd5 11. Qb3 Rd8 12. c4 Be6. The resulting position leaves white to move.