Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. Bf4 d5 3. e3 e6 4. Nd2 c5 5. c3 cxd4 6. exd4 Bd6 7. Bxd6 Qxd6 8.
Ngf3 Nc6 9. Bd3 O-O 10. O-O e5 11. dxe5 Nxe5 12. Nxe5 Qxe5 13. Nf3 Qh5 14. Be2
Re8 15. Nd4 Bg4 16. Bxg4 Qxg4 17. Qxg4 Nxg4 18. Rfe1 Kf8 19. Rad1 Ne5 20. Kf1
Nc4 21. Rxe8+ Rxe8 22. b3 Nb6 23. Re1 g6 24. Rxe8+ Kxe8 25. Ke2 Kd7 26. Kd3 Kd6
27. Nb5+ Kc5 28. Nxa7 Nd7 29. f4 h5 30. a4 Nf6 31. h3 h4 32. Nb5 Nh5 33. b4+
Kc6 34. Nd4+ Kd6 35. Ne2 Ng7 36. c4 dxc4+ 37. Kxc4 Nf5 38. Kb5 Kc7 39. Nc3 Ne3
40. a5 Nxg2 41. Nd5+ Kb8 42. Kb6 f6 43. b5 g5 44. fxg5 fxg5 45. a6 bxa6 46.
bxa6 Nf4 47. a7+ Ka8 *
Position (FEN): k7/P7/1K6/3N2p1/5n1p/7P/8/8 w - - 1 48
White to move.
Themes:  Endgame, Knight Endgame Mate in 1 
Puzzle rating: 415
Best move: Nc7#