Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. Nc3 d6 5. Bf4 O-O 6. e4 Nbd7 7. Bd3 Nh5 8. Be3
e5 9. d5 c6 10. O-O Nb6 11. Bg5 f6 12. Be3 Bg4 13. h3 Bxf3 14. Qxf3 f5 15. exf5
e4 16. Bxe4 Nxc4 17. dxc6 bxc6 18. Rab1 d5 19. Nxd5 cxd5 20. Bxd5+ Kh8 21. Bxa8
Qxa8 22. Qxa8 Rxa8 23. fxg6 hxg6 24. Bc1 Rd8 25. b3 Nd2 26. Bxd2 Rxd2 27. a4
Bd4 28. b4 Nf4 29. a5 Bc3 30. Kh2 Be5 31. g3 Nd3 32. Kg2 Bc3 33. h4 Bxb4 34. a6
Bc5 35. Rbd1 Rxd1 36. Rxd1 Nxf2 37. Rd5 Bb6 38. Rd6 Bc5 39. Rxg6 Kh7 40. Rc6
Bd4 41. Kf3 Nh3 42. g4 Ng1+ 43. Kf4 Ne2+ 44. Kg5 Be3+ 45. Kh5 *
Position (FEN): 8/p6k/P1R5/7K/6PP/4b3/4n3/8 b - - 6 45
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 1689
Best move: Ng3#