Chess puzzle (Checkmate)
Opening: Nimzowitsch_Defense, Nimzowitsch_Defense_Other_variations
Moves: 1. e4 Nc6 2. Bc4 Nf6 3. d3 a6 4. a3 b5 5. Bb3 Bb7 6. Bd2 e6 7. Nf3 Be7 8. O-O
O-O 9. e5 Ne8 10. c3 d6 11. exd6 Bxd6 12. d4 Na5 13. Bc2 Bxf3 14. Qxf3 Nf6 15.
Bg5 Be7 16. Nd2 h6 17. Bh4 Nh7 18. Qd3 Bxh4 *
Position (FEN): r2q1rk1/2p2ppn/p3p2p/np6/3P3b/P1PQ4/1PBN1PPP/R4RK1 w - - 0 19
White to move.
Themes: Kingside Attack Middlegame Mate in 1 
Puzzle rating: 534
Best move: Qxh7#