Chess puzzle (Checkmate)
Moves: 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Nf3 e6 5. g3 Nbd7 6. Bg2 dxc4 7. a4 Bb4 8. O-O
Bxc3 9. bxc3 Nd5 10. Qc2 O-O 11. e4 N5f6 12. Re1 b5 13. axb5 cxb5 14. Bg5 h6
15. Bxf6 Nxf6 16. Ne5 Bb7 17. h3 a6 18. Qb2 Nd7 19. Nxc4 Qc7 20. Na5 Rac8 21.
Nxb7 Qxb7 22. e5 Qb6 23. Rec1 Rc7 24. c4 bxc4 25. Qxb6 Nxb6 26. Rxa6 Nd5 27.
Bxd5 exd5 28. Rd6 Rb8 29. Rxd5 Rb2 30. Rc5 Ra7 31. R5xc4 Raa2 32. Rf1 Re2 33.
Kg2 Rad2 34. Kf3 Kh7 35. h4 Kg6 36. g4 f5 37. exf6 Kxf6 38. Rc6+ Ke7 39. Rg6
Kf7 40. h5 Re7 41. Rd6 Rc7 42. Ra1 Rcc2 43. Rf1 Rc4 44. Ke3 Rcc2 45. f4 Re2+
46. Kd3 Red2+ 47. Ke4 Re2+ 48. Kf5 Rb2 49. Rd7+ Kg8 50. Kg6 Rb6+ 51. Kf5 *
Position (FEN): 6k1/3R2p1/1r5p/5K1P/3P1PP1/8/4r3/5R2 b - - 12 51
Black to move.
Themes:  Endgame, Rook Endgame Mate in 1 
Puzzle rating: 1466
Best move: Rf6#