Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. Bf4 Nd5 3. Bg3 e6 4. e4 Nf6 5. Bd3 d5 6. e5 Ne4 7. Ne2 Nxg3 8.
Nxg3 Nc6 9. c3 a6 10. Nd2 g6 11. Nf3 f6 12. exf6 Qxf6 13. Qc2 Bd7 14. O-O-O
O-O-O 15. Rde1 Bd6 16. Qb3 Na5 17. Qc2 c5 18. dxc5 Bxc5 19. Nd4 Bxd4 20. cxd4+
Kb8 21. Kb1 Rc8 22. Qe2 Qxd4 23. Rd1 Qb6 24. Rc1 Nc4 25. Bxc4 dxc4 26. Rxc4
Rxc4 27. Qe5+ Ka7 28. Qxh8 Qxf2 29. Qxh7 Qc2+ 30. Ka1 Qc1+ 31. Rxc1 *
Position (FEN): 8/kp1b3Q/p3p1p1/8/2r5/6N1/PP4PP/K1R5 b - - 0 31
Black to move.
Themes:  Endgame Back Rank Mate, Mate in 1 
Puzzle rating: 427
Best move: Rxc1#