Chess puzzle (Checkmate)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Other_variations
Moves: 1. d4 d5 2. c4 e6 3. Bf4 Bd6 4. Bg3 Bxg3 5. hxg3 Nf6 6. e3 Nbd7 7. Nc3 b6 8.
Qb3 Bb7 9. Nf3 Rb8 10. O-O-O c5 11. Bd3 dxc4 12. Bxc4 Bxf3 13. gxf3 a6 14. dxc5
bxc5 15. Qa4 O-O 16. Qc2 Ne5 17. Ne4 Qb6 18. Nxf6+ gxf6 *
Position (FEN): 1r3rk1/5p1p/pq2pp2/2p1n3/2B5/4PPP1/PPQ2P2/2KR3R w - - 0 19
White to move.
Themes: Kingside Attack Middlegame Mate in 1 
Puzzle rating: 809
Best move: Qxh7#