Chess puzzle (Checkmate)
Opening: Philidor_Defense, Philidor_Defense_Other_variations
Moves: 1. e4 e5 2. Nf3 d6 3. d4 Bg4 4. d5 c6 5. h3 Bh5 6. Nc3 cxd5 7. Nxd5 Nf6 8. g4
Bg6 9. Bg5 Bxe4 10. Nxf6+ gxf6 11. Be3 Nc6 12. Bd3 Bxf3 13. Qxf3 Nd4 14. Bxd4
exd4 15. Qe4+ Be7 16. Qxd4 Qa5+ 17. c3 O-O 18. Qe4 Bd8 *
Position (FEN): r2b1rk1/pp3p1p/3p1p2/q7/4Q1P1/2PB3P/PP3P2/R3K2R w KQ - 3 19
White to move.
Themes: Kingside Attack Middlegame Mate in 1 
Puzzle rating: 516
Best move: Qxh7#