Chess puzzle (Checkmate)
Moves: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nxd4 5. Qxd4 d6 6. Nc3 Nf6 7. Bg5 Be7 8.
O-O-O Be6 9. f3 h6 10. Bh4 O-O 11. g4 d5 12. e5 Nd7 13. Bxe7 Qxe7 14. Nxd5 Bxd5
15. Qxd5 Nxe5 16. Qe4 Rad8 17. f4 Rxd1+ 18. Kxd1 Qd6+ 19. Kc1 Nxg4 20. Bd3 Nf2
*
Position (FEN): 5rk1/ppp2pp1/3q3p/8/4QP2/3B4/PPP2n1P/2K4R w - - 2 21
White to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 860
Best move: Qh7#