Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. Nf3 d5 3. Bg5 h6 4. Bxf6 gxf6 5. Nc3 Nc6 6. e3 Bf5 7. h3 Bh7 8.
Bd3 Bg6 9. Bxg6 fxg6 10. Qd3 Rg8 11. Qb5 Qd7 12. Nxd5 O-O-O 13. Nc3 e6 14.
O-O-O a6 15. Qb3 Na5 16. Qa4 b6 17. d5 Qxa4 18. Nxa4 exd5 19. Nc3 c6 20. Rd4
Bg7 21. Rg4 f5 22. Ra4 Bxc3 23. bxc3 Nc4 24. Rxa6 Kb7 25. Ra4 c5 26. Nd2 Nxd2
27. Kxd2 b5 28. Ra3 c4 29. Rb1 Kb6 30. Ke2 Rde8 31. g3 g5 32. Kf1 Re4 33. Ke2
f4 34. Kf3 fxe3 35. fxe3 Rge8 36. Re1 h5 37. Kf2 g4 38. hxg4 hxg4 39. Rh1 Rxe3
40. Rh6+ R8e6 41. Rxe6+ Rxe6 42. Ra8 Rf6+ 43. Ke2 Rf3 44. Rb8+ Ka7 45. Rxb5
Rxc3 46. Rxd5 Rxc2+ 47. Kd1 Rxa2 48. Rd4 Rg2 49. Rxg4 c3 50. Kc1 Kb6 51. Rg5
Kc6 52. Rg4 Kd5 53. Rg5+ Ke4 54. Rg4+ Kd3 55. Rg5 *
Position (FEN): 8/8/8/6R1/8/2pk2P1/6r1/2K5 b - - 11 55
Black to move.
Themes:  Endgame, Rook Endgame Mate in 1 
Puzzle rating: 1535
Best move: Rg1#