Chess puzzle (Checkmate)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Albin_Countergambit
Moves: 1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. Bg5 Bb4+ 6. Nbd2 Nge7 7. a3 Bxd2+ 8.
Qxd2 Be6 9. Bxe7 Qxe7 10. Nxd4 Nxe5 11. Nxe6 Qxe6 12. e3 Nxc4 13. Qc3 Nd6 14.
Qxg7 O-O-O 15. Qc3 Ne4 16. Qb4 Qf6 17. Qxe4 Qxb2 18. Rb1 *
Position (FEN): 2kr3r/ppp2p1p/8/8/4Q3/P3P3/1q3PPP/1R2KB1R b K - 1 18
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 1309
Best move: Qd2#