Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 d5 5. cxd5 Nxd5 6. g3 O-O 7. Bg2 c5 8.
Nxd5 Qxd5 9. O-O cxd4 10. Be3 Qh5 11. Nxd4 Rd8 12. Qa4 Bd7 13. Qb3 Nc6 14. Nxc6
Bxc6 15. Bxc6 bxc6 16. Qc2 Rab8 17. Rab1 a5 18. b3 Qb5 19. Rfc1 Rbc8 20. Qc4 e6
21. Qxb5 cxb5 22. Bb6 Rxc1+ 23. Rxc1 Ra8 24. Rc5 Bd4 25. Rc6 Bxb6 26. Rxb6 b4
27. e3 h5 28. Kf1 Kg7 29. Ke2 Ra7 30. Kd3 Kf6 31. f4 h4 32. Rb5 Rc7 33. Rxa5
Rd7+ 34. Ke2 h3 35. g4 Rc7 36. g5+ Kg7 37. Kf3 Rc2 38. Kg3 Re2 39. Re5 Rxa2 40.
Re4 Re2 41. Kxh3 f6 42. gxf6+ Kxf6 43. Kg3 Kf5 44. Re5+ Kf6 45. h4 Rb2 46. h5
gxh5 47. Rxh5 Rxb3 48. Kf3 Rb1 49. Rh6+ Kf5 *
Position (FEN): 8/8/4p2R/5k2/1p3P2/4PK2/8/1r6 w - - 4 50
White to move.
Themes:  Endgame, Rook Endgame Mate in 1 
Puzzle rating: 1074
Best move: e4#