Chess puzzle (Checkmate)
Moves: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 Qa5 7. Qd2 Qb4 8.
O-O-O Bxd4 9. Bxd4 Qxd4 10. Qxd4 Nxd4 11. Rxd4 Nf6 12. Nd5 Nxd5 13. Rxd5 d6 14.
Bb5+ Bd7 15. Bxd7+ Kxd7 16. Rhd1 Rhd8 17. e5 Kc7 18. exd6+ Rxd6 19. Rxd6 exd6
20. Rd3 Re8 21. Kd2 Re5 22. Rf3 f5 23. Rh3 h5 24. Rg3 Re6 25. Re3 Kd7 26. Ra3
a6 27. Rb3 b5 28. Ra3 d5 29. Rd3 Kd6 30. a4 f4 31. axb5 axb5 32. Rf3 g5 33. Rb3
Kc5 34. Rc3+ Kd6 35. Ra3 Re4 36. Ra6+ Kc5 37. Rg6 g4 38. Rh6 Re5 39. Kc3 f3 *
Position (FEN): 8/8/7R/1pkpr2p/6p1/2K2p2/1PP2PPP/8 w - - 0 40
White to move.
Themes:  Endgame, Rook Endgame Mate in 1 
Puzzle rating: 1430
Best move: b4#