Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Nf3 Be7 5. Bg5 O-O 6. e3 b6 7. cxd5 exd5 8. Bd3
Bb7 9. O-O Nbd7 10. Rc1 c5 11. Bb1 Ne4 12. Bxe7 Qxe7 13. dxc5 Nxc3 14. Rxc3
bxc5 15. b4 c4 16. Qc2 g6 17. Qb2 Nb6 18. Bc2 Nc8 19. Nd4 Nd6 20. a4 a6 21. h3
f5 22. b5 axb5 23. axb5 Rfc8 24. Ra3 Qc7 25. b6 c3 26. bxc7 cxb2 27. Rb3 Ba6
28. Rb1 Nc4 29. Bd3 Rxc7 30. Bxc4 dxc4 31. R3xb2 c3 32. Ra2 Raa7 33. Rba1 c2
34. Nxc2 Rab7 35. Nd4 Bc4 36. Rc2 Kg7 37. Rac1 Rb4 38. Ne6+ Bxe6 39. Rxc7+ Kh6
40. Re7 Bd5 41. Rcc7 Kg5 42. Rxh7 Rb1+ 43. Kh2 Rb2 44. f3 Bxf3 45. h4+ Kg4 46.
Kg1 Rxg2+ 47. Kf1 Ra2 48. Rc4+ Be4 49. h5 Kf3 50. Ke1 Kxe3 51. Rc2 Ra1+ 52. Rc1
*
Position (FEN): 8/7R/6p1/5p1P/4b3/4k3/8/r1R1K3 b - - 3 52
Black to move.
Themes: Hanging Piece Endgame Mate in 1 
Puzzle rating: 839
Best move: Rxc1#