Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. b6 d6 6. Nc3 Nbd7 7. e4 g6 8. Nf3 Bg7
9. Be2 O-O 10. O-O Nxb6 11. a4 Bd7 12. a5 Nc8 13. e5 dxe5 14. Nxe5 Nd6 15. Be3
Qc7 16. h3 Nb5 17. Nc4 Nxc3 18. bxc3 Ne4 19. Bd2 Nxc3 20. Bxc3 Bxc3 21. Nb6
Bxa1 22. Nxa8 Rxa8 23. Qxa1 Bb5 24. Re1 Bxe2 25. Rxe2 Rd8 26. Qe5 Qxe5 27. Rxe5
Rd7 28. Kf1 f6 29. Re6 Rxd5 30. Rxe7 c4 31. Rc7 Rxa5 32. Rxc4 Kg7 33. Ke2 g5
34. g4 Kg6 35. Rc6 Ra3 36. f3 a5 37. Ra6 a4 38. Kf2 Ra1 39. Kg2 a3 40. Kh2 a2
41. Kg2 h5 42. Kh2 h4 43. Kg2 Kf7 44. Ra7+ Ke6 45. Ra6+ Kd5 46. Ra5+ Kc4 47.
Ra8 Kd3 48. Rd8+ Ke3 49. Re8+ Kf4 *
Position (FEN): 4R3/8/5p2/6p1/5kPp/5P1P/p5K1/r7 w - - 14 50
White to move.
Themes:  Endgame, Rook Endgame Mate in 1 
Puzzle rating: 480
Best move: Re4#