Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nc6 7. Nc3 e5 8. d5
Ne7 9. e4 Ne8 10. Ne1 f5 11. Nd3 Nf6 12. f4 Nxe4 13. Nxe4 fxe4 14. Bxe4 Bh3 15.
Re1 c6 16. fxe5 dxe5 17. Nf2 cxd5 18. cxd5 Bf5 19. Bg2 Nc8 20. g4 Bd7 21. d6
Bc6 22. Bxc6 bxc6 23. d7 Nb6 24. Be3 Nd5 25. Bc5 Rf7 26. Ne4 Qxd7 27. Qb3 Qxg4+
28. Qg3 Qxg3+ 29. hxg3 h6 30. Rac1 Rb8 31. b3 Rd7 32. Rcd1 Rbd8 33. Rc1 a6 34.
Bf2 Nb4 35. Nc5 Rf7 36. a3 Nd3 37. Nxd3 Rxd3 38. Rxc6 Rxb3 39. Rxa6 Rb2 40. Be3
Kh7 41. Rf1 Rxf1+ 42. Kxf1 g5 43. a4 e4 44. a5 Ra2 45. Ra7 Kg6 46. a6 Ra3 47.
Ke2 Be5 48. g4 Ra2+ 49. Kf1 Bf4 50. Bd4 e3 *
Position (FEN): 8/R7/P5kp/6p1/3B1bP1/4p3/r7/5K2 w - - 0 51
White to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 630
Best move: Rg7#