Chess puzzle (Checkmate)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Mason_Variation
Moves: 1. d4 d5 2. Bf4 Nf6 3. e3 e6 4. Nf3 Bd6 5. Ne5 Nfd7 6. Nd2 Nxe5 7. dxe5 Be7 8.
Bd3 O-O 9. h3 Bg5 10. O-O Bxf4 11. exf4 Nc6 12. c3 f5 13. Qh5 g6 14. Qh6 d4 15.
Nf3 dxc3 16. Ng5 Qe7 17. bxc3 Nd8 18. Rfd1 Nf7 *
Position (FEN): r1b2rk1/ppp1qn1p/4p1pQ/4PpN1/5P2/2PB3P/P4PP1/R2R2K1 w - - 3 19
White to move.
Themes: Kingside Attack Middlegame Mate in 1 
Puzzle rating: 820
Best move: Qxh7#