Chess puzzle (Checkmate)
Moves: 1. Nf3 d5 2. g3 Nc6 3. Bg2 e5 4. d3 f5 5. O-O Nf6 6. Nbd2 Be6 7. Ng5 Qd7 8.
Nxe6 Qxe6 9. e4 d4 10. exf5 Qxf5 11. f4 O-O-O 12. Nc4 exf4 13. Bxf4 Qb5 14. a4
Qh5 15. Qxh5 Nxh5 16. Bxc6 bxc6 17. Bd2 Nf6 18. Rae1 Bd6 19. Kg2 Rhe8 20. Rxe8
Rxe8 21. Re1 Rxe1 22. Bxe1 Nd5 23. Kf3 c5 24. Ke4 Nf6+ 25. Kf5 Kd7 26. Bd2 Ke7
27. Bg5 *
Position (FEN): 8/p1p1k1pp/3b1n2/2p2KB1/P1Np4/3P2P1/1PP4P/8 b - - 7 27
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 1137
Best move: g6#