Chess puzzle (Checkmate)
Moves: 1. Nf3 d5 2. d4 Bg4 3. e3 f6 4. Be2 Nd7 5. O-O c6 6. Nbd2 e5 7. h3 Bh5 8. Nh4
Bf7 9. c4 g5 10. Nf5 h5 11. dxe5 fxe5 12. cxd5 Bxd5 13. Bxh5+ Bf7 14. Bg4 Qc7
15. Ne4 O-O-O 16. Qa4 a6 17. Bd2 Ngf6 18. Ba5 b6 19. Nxf6 Nxf6 20. Rfc1 c5 21.
Bxb6 Qxb6 22. Nd6+ Kc7 23. Nxf7 Nxg4 24. hxg4 Be7 25. Nxh8 Rxh8 26. b4 Qh6 27.
bxc5 *
Position (FEN): 7r/2k1b3/p6q/2P1p1p1/Q5P1/4P3/P4PP1/R1R3K1 b - - 0 27
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 619
Best move: Qh1#