Chess puzzle (Checkmate)
Opening: Horwitz_Defense, Horwitz_Defense_Other_variations
Moves: 1. d4 e6 2. a3 d5 3. c4 dxc4 4. Nc3 Nf6 5. e4 Nc6 6. Nf3 Be7 7. Bxc4 O-O 8. O-O
a6 9. Be3 b5 10. Ba2 Bb7 11. Qd3 Na5 12. b4 Nc4 13. Bb1 Nb2 14. Qc2 Nc4 15. e5
Nxe3 16. Qd3 Nxf1 17. exf6 Bxf6 *
Position (FEN): r2q1rk1/1bp2ppp/p3pb2/1p6/1P1P4/P1NQ1N2/5PPP/RB3nK1 w - - 0 18
White to move.
Themes: Kingside Attack Middlegame Mate in 1 
Puzzle rating: 492
Best move: Qxh7#