Chess puzzle (Checkmate)
Moves: 1. d4 d5 2. c4 e6 3. g3 Nf6 4. Bg2 Bb4+ 5. Nc3 O-O 6. Nf3 dxc4 7. O-O Nc6 8. a3
Bxc3 9. bxc3 Rb8 10. Re1 b5 11. e4 Bb7 12. Bg5 h6 13. Bf4 Nh5 14. Be3 Nf6 15.
e5 Nd5 16. Bd2 Nce7 17. Rb1 a6 18. Qc2 Nf5 19. Re2 Qe7 20. Bc1 c6 21. Nd2 c5
22. dxc5 Qxc5 23. Ne4 Qe7 24. f4 Rfd8 25. g4 Nh4 26. f5 exf5 27. gxf5 Nxg2 28.
Rxg2 Qxe5 29. Nc5 Ne3 30. Bxe3 Qxe3+ 31. Qf2 Qxc3 32. Nxb7 Rxb7 33. f6 g6 34.
Rg3 Qd4 35. Re3 Qg4+ 36. Rg3 Rd1+ 37. Rxd1 Qxd1+ 38. Kg2 Rd7 39. Qc5 Qd5+ 40.
Qxd5 Rxd5 41. Re3 Kf8 42. Re7 Rd2+ 43. Kf1 Ra2 44. Ra7 Rxa3 *
Position (FEN): 5k2/R4p2/p4Ppp/1p6/2p5/r7/7P/5K2 w - - 0 45
White to move.
Themes:  Endgame, Rook Endgame Mate in 1 
Puzzle rating: 505
Best move: Ra8#