Chess puzzle (Checkmate)
Moves: 1. d4 e6 2. Bf4 d6 3. Nf3 Nc6 4. e4 Bd7 5. Bb5 Nf6 6. Bxc6 Bxc6 7. e5 Nd5 8.
Bg5 Be7 9. Bd2 dxe5 10. Nxe5 Bb5 11. c4 Nb4 12. cxb5 Qxd4 13. Bc3 Qxd1+ 14.
Kxd1 Nd5 15. Kc2 O-O 16. Nd2 Nxc3 17. Kxc3 Bf6 18. Nf3 c6 19. b6 axb6 20. Kc2
c5 21. Nd7 Rfd8 22. Nxb6 Ra6 23. Nc4 Ra4 24. Nfe5 Bg5 25. a3 f6 26. Nb6 Re4 27.
Nec4 Re2+ 28. Kb3 Rxf2 29. g3 Rd3+ 30. Ka2 f5 31. h4 Bf6 32. Rab1 Rxg3 33. Nd7
Bd4 34. Rhe1 Kf7 35. Nde5+ Kf6 36. Nd7+ Ke7 37. Nde5 b5 38. Nc6+ Kf7 39. Nxd4
cxd4 40. Nd6+ Kf6 41. Nxb5 Rg4 42. Nc7 e5 43. Nd5+ Ke6 44. Nb6 Rxh4 45. Nc4 e4
46. Rbc1 Kd5 47. Nb6+ Ke5 48. Rc5+ Kf4 49. Nd5+ Kg5 50. Rg1+ Kh6 51. Rb5 d3 52.
Ne3 g6 53. Rg2 Rf3 54. Nc4 e3 55. Ne5 Rf1 56. Nf7+ Kh5 *
Position (FEN): 8/5N1p/6p1/1R3p1k/7r/P2pp3/KP4R1/5r2 w - - 4 57
White to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 786
Best move: Rg5#