Chess puzzle (Checkmate)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Janowski_Variation
Moves: 1. d4 d5 2. c4 e6 3. Nc3 a6 4. cxd5 exd5 5. Nf3 Bf5 6. Bg5 f6 7. Bf4 Bd6 8.
Nxd5 Be4 9. Bxd6 Qxd6 10. Nc3 Bxf3 11. gxf3 Nc6 12. Rg1 Nxd4 13. Rxg7 O-O-O 14.
e3 Nxf3+ 15. Qxf3 *
Position (FEN): 2kr2nr/1pp3Rp/p2q1p2/8/8/2N1PQ2/PP3P1P/R3KB2 b Q - 0 15
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 939
Best move: Qd2#