Chess puzzle (Checkmate)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Marshall_Defense
Moves: 1. d4 Nf6 2. c4 d5 3. cxd5 Nxd5 4. Nf3 e6 5. e4 Bb4+ 6. Bd2 Bxd2+ 7. Qxd2 Nb6
8. Nc3 O-O 9. Bd3 Nc6 10. e5 g6 11. Qh6 f6 12. exf6 Qxf6 13. O-O-O Nd5 14. Ng5
Nxc3 *
Position (FEN): r1b2rk1/ppp4p/2n1pqpQ/6N1/3P4/2nB4/PP3PPP/2KR3R w - - 0 15
White to move.
Themes: Kingside Attack Middlegame Mate in 1 
Puzzle rating: 989
Best move: Qxh7#