Chess puzzle (Checkmate)
Opening: Nimzowitsch_Defense, Nimzowitsch_Defense_Other_variations
Moves: 1. e4 Nc6 2. f4 d5 3. e5 Nb8 4. Nf3 Nh6 5. d4 e6 6. Bd3 c5 7. c3 Nc6 8. O-O Be7
9. Bc2 Bd7 10. Nbd2 cxd4 11. cxd4 Nb4 12. Bb1 Bb5 13. a3 Bxf1 14. axb4 Ba6 15.
Nb3 O-O 16. Nc5 Bxc5 17. bxc5 Bb5 18. Qc2 a6 *
Position (FEN): r2q1rk1/1p3ppp/p3p2n/1bPpP3/3P1P2/5N2/1PQ3PP/RBB3K1 w - - 0 19
White to move.
Themes: Kingside Attack Middlegame Mate in 1 
Puzzle rating: 452
Best move: Qxh7#