Chess puzzle (Checkmate)
Moves: 1. d4 d5 2. c4 c6 3. e3 Nf6 4. Nc3 e6 5. Nf3 Bb4 6. Bd2 O-O 7. a3 Bd6 8. c5 Bc7
9. b4 b6 10. Bd3 b5 11. a4 Bd7 12. axb5 cxb5 13. Nxb5 a6 14. Nxc7 Qxc7 15. O-O
Nc6 16. b5 axb5 17. Bxb5 Rfe8 18. Bxc6 Bxc6 19. Ne5 Rac8 20. Nxc6 Qxc6 21. Ba5
e5 22. Bb6 e4 23. Qa4 Qe6 24. Rfc1 Ng4 25. h3 Nh6 26. Rc2 Qg6 27. c6 Nf5 28. c7
Nh4 29. g3 Nf3+ 30. Kg2 Qxb6 31. Rb1 Qe6 32. Rc6 Qd7 33. Rbc1 Ra8 34. Qxa8 Ne1+
35. Kf1 Qxh3+ 36. Kxe1 Qh1+ 37. Kd2 Qxc1+ 38. Rxc1 Rxa8 39. c8=Q+ Rxc8 *
Position (FEN): 2r3k1/5ppp/8/3p4/3Pp3/4P1P1/3K1P2/2R5 w - - 0 40
White to move.
Themes:  Endgame, Rook Endgame Back Rank Mate, Mate in 1 
Puzzle rating: 548
Best move: Rxc8#