Chess puzzle (Checkmate)
Moves: 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Bg5 Bg7 5. f4 O-O 6. e5 Nfd7 7. Bc4 Nc6 8. Nf3
Nb6 9. Bb3 Na5 10. Qe2 Nxb3 11. axb3 f6 12. Bh4 c6 13. O-O Nd5 14. Nxd5 cxd5
15. exf6 exf6 16. Qb5 Be6 17. Qxb7 Qc8 18. Qxc8 Rfxc8 19. c3 a5 20. Rfe1 Kf7
21. Ra4 Bd7 22. Ra3 a4 23. Rea1 Rab8 24. bxa4 Rxb2 25. a5 Bc6 26. a6 Ba8 27. a7
Rc2 28. Be1 Bh6 29. g3 g5 30. fxg5 fxg5 31. Ra6 g4 32. Nh4 Ke6 33. Bf2 Rf8 34.
Re1+ Kd7 35. Be3 Re8 36. Nf5 Bxe3+ 37. Rxe3 Rxe3 38. Nxe3 Rxc3 39. Nxg4 Rd3 40.
Nf6+ Ke6 41. Nxh7 Rxd4 42. Ng5+ Kf5 43. Nf7 Rd2 44. Nxd6+ Kg4 45. Nb5 d4 46.
Nc7 Bb7 47. Rb6 Be4 48. Re6 Kf3 49. Rf6+ Ke3 50. Nd5+ Bxd5 51. Re6+ Kf3 52. Re1
Rg2+ 53. Kf1 Bc4+ 54. Re2 Bxe2+ 55. Ke1 Ke3 56. a8=Q *
Position (FEN): Q7/8/8/8/3p4/4k1P1/4b1rP/4K3 b - - 0 56
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 837
Best move: Rg1#