Chess puzzle (Checkmate)
Moves: 1. e4 c5 2. Nc3 g6 3. g3 Bg7 4. Bg2 Bxc3 5. dxc3 d6 6. Ne2 Nc6 7. O-O Ne5 8. h3
Be6 9. b3 Qd7 10. Kh2 Nf6 11. Nf4 Rg8 12. Nxe6 Qxe6 13. Bf4 g5 14. Be3 O-O-O
15. b4 g4 16. h4 Qc4 17. Qd2 Nxe4 18. Qc1 Nf3+ 19. Bxf3 gxf3 20. bxc5 dxc5 21.
Qa3 Rxg3 22. fxg3 Qe2+ 23. Kh3 Qg2+ 24. Kg4 Rg8+ 25. Kf4 Rg4+ 26. Kxg4 Qxg3+
27. Kf5 *
Position (FEN): 2k5/pp2pp1p/8/2p2K2/4n2P/Q1P1Bpq1/P1P5/R4R2 b - - 1 27
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 1937
Best move: Nd6#