Chess puzzle (Checkmate)
Moves: 1. d4 d5 2. Nf3 Nf6 3. g3 e6 4. Bg2 c5 5. O-O cxd4 6. Nxd4 Nc6 7. c4 Bc5 8. Nb3
Be7 9. N1d2 O-O 10. cxd5 Nxd5 11. a3 Bd7 12. Ne4 b6 13. Nd4 Nxd4 14. Qxd4 Rc8
15. Bd2 Nf6 16. Bc3 Bc6 17. Qxd8 Rfxd8 18. Nxf6+ Bxf6 19. Bxf6 gxf6 20. Rfd1
Bxg2 21. Kxg2 Rxd1 22. Rxd1 Rc2 23. Rd7 Rxe2 24. Rxa7 Rxb2 25. Rb7 Kg7 26. a4
Ra2 27. Rxb6 Rxa4 28. Rb7 f5 29. Rc7 Ra2 30. Kf3 Kf6 31. h4 Rd2 32. Rb7 h5 33.
Rc7 Ra2 34. Rb7 Ra3+ 35. Kg2 Ra6 36. Kf3 Rd6 37. Rc7 Rd4 38. Rc8 Kg7 39. Rc7
Rg4 40. Rb7 Kf6 41. Rb8 Rg7 42. Rh8 Kg6 43. Ke2 Rh7 44. Rg8+ Kf6 45. Kf3 Ke5
46. Ke3 f6 47. Rd8 Rb7 *
Position (FEN): 3R4/1r6/4pp2/4kp1p/7P/4K1P1/5P2/8 w - - 2 48
White to move.
Themes:  Endgame, Rook Endgame Mate in 1 
Puzzle rating: 902
Best move: f4#