Chess puzzle (Checkmate)
Moves: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Nb3 Bb6 6. Nc3 Nge7 7. Qe2 O-O 8.
Be3 Ng6 9. f3 Qh4+ 10. g3 Qd8 11. O-O-O d6 12. Qd2 Be6 13. h4 Bxb3 14. cxb3
Nge5 15. Be2 Bxe3 16. Qxe3 a6 17. g4 b5 18. g5 b4 19. Na4 Re8 20. h5 Ne7 21. f4
N5c6 22. Bc4 d5 23. g6 Nf5 24. gxh7+ Kxh7 25. Qh3 Nd6 26. Bxd5 Na5 27. h6 g6
28. Bxa8 Qxa8 29. Qd7 Qxe4 30. Rhe1 Qxf4+ 31. Kb1 Rxe1 32. Rxe1 Qxh6 33. Qxc7
Qd2 34. Rh1+ Kg7 35. Qc2 Qxc2+ 36. Kxc2 Nab7 37. Rh4 a5 38. Kd3 g5 39. Rd4 Kg6
40. Rd5 f5 41. Ke3 Kh5 42. Nc5 Nxc5 43. Rxc5 Kg4 44. Rxa5 f4+ 45. Kf2 Ne4+ 46.
Kg2 f3+ 47. Kf1 Kg3 48. a4 f2 49. Rd5 g4 50. a5 Kf3 51. a6 *
Position (FEN): 8/8/P7/3R4/1p2n1p1/1P3k2/1P3p2/5K2 b - - 0 51
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 1378
Best move: Ng3#