Chess puzzle (Checkmate)
Moves: 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. Bd3 Nf6 5. c3 Nc6 6. Bf4 g6 7. Nf3 Bg7 8. O-O
O-O 9. Nbd2 Nh5 10. Bg5 h6 11. Bh4 g5 12. Nxg5 Nf4 13. Nh7 Nxd3 14. Nxf8 Qxf8
15. Qf3 Nxb2 16. Qxd5 e5 17. Qb5 exd4 18. Ne4 dxc3 19. Nf6+ Kh8 20. Rac1 Nd4
21. Qe5 Nf5 22. Qe4 Nxh4 *
Position (FEN): r1b2q1k/pp3pb1/5N1p/8/4Q2n/2p5/Pn3PPP/2R2RK1 w - - 0 23
White to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 837
Best move: Qh7#