Chess puzzle (Checkmate)
Moves: 1. Nf3 g6 2. c4 f5 3. b3 Nf6 4. Bb2 Bg7 5. d3 O-O 6. Nbd2 d6 7. g3 e5 8. e4
fxe4 9. Nxe4 Nxe4 10. dxe4 Nc6 11. h3 Qe7 12. a3 Nd4 13. Nxd4 exd4 14. Bg2 Bf5
15. f3 Bd7 16. Bxd4 Qg5 17. Bxg7 Qxg3+ 18. Kf1 Kxg7 19. Qd4+ Kh6 20. Qe3+ Qg5
21. Ke2 Rae8 22. Qxg5+ Kxg5 23. Ke3 Bc6 24. h4+ Kf6 25. f4 Re7 26. Rae1 Ref7
27. Rhf1 Kg7 28. Rf2 Re7 29. Kd4 Rfe8 30. Rfe2 Bd7 31. b4 b6 32. Bf3 c5+ 33.
bxc5 dxc5+ 34. Kd3 b5 35. e5 a5 36. Ke3 bxc4 37. Rc2 Bb5 38. Be2 Rd7 39. Bxc4
Bxc4 40. Rxc4 Red8 41. Rxc5 Rd3+ 42. Kf2 Rxa3 43. e6 Re8 44. Rc7+ Kf6 *
Position (FEN): 4r3/2R4p/4Pkp1/p7/5P1P/r7/5K2/4R3 w - - 3 45
White to move.
Themes:  Endgame, Rook Endgame Mate in 1 
Puzzle rating: 859
Best move: Rf7#