Chess puzzle (Checkmate)
Moves: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nxd4 5. Qxd4 c5 6. Qa4 a6 7. Be2 Nf6 8.
e5 Nd5 9. Bf3 b5 10. Qe4 Bb7 11. Qf5 Ne7 12. Qf4 Bxf3 13. Qxf3 Ng6 14. Qe4 Be7
15. Nc3 O-O 16. Nd5 Re8 17. O-O Bd6 18. f4 f6 19. Qf5 Ne7 20. Nxe7+ Bxe7 21.
exf6 Bxf6 22. Qxc5 Rc8 23. Qd5+ Kh8 24. c3 Re2 25. Qd3 Qb6+ 26. Kh1 Rce8 27.
Bd2 Qc6 28. Rg1 Bh4 29. Raf1 Qh6 30. g3 Qc6+ 31. Qf3 Qxf3+ 32. Rxf3 Rxd2 33.
gxh4 Ree2 34. Rh3 Rxb2 35. Ra1 Rxa2 36. Rxa2 Rxa2 37. Kg1 Rc2 38. Rf3 a5 39. h3
a4 40. Kf1 a3 41. c4 a2 42. Ra3 b4 *
Position (FEN): 7k/3p2pp/8/8/1pP2P1P/R6P/p1r5/5K2 w - - 0 43
White to move.
Themes:  Endgame, Rook Endgame Back Rank Mate, Mate in 1 
Puzzle rating: 671
Best move: Ra8#