Chess puzzle (Checkmate)
Moves: 1. e4 d6 2. d4 e6 3. Nf3 Nf6 4. Bd3 Nfd7 5. O-O Be7 6. Nc3 a6 7. e5 O-O 8. exd6
cxd6 9. Ne4 b5 10. Bf4 Nf6 11. Qd2 Bb7 12. Nxf6+ Bxf6 13. Ng5 Bxg5 14. Bxg5 f6
15. Bh4 Nd7 16. Rae1 e5 17. dxe5 Nxe5 18. Bf5 Qc7 19. Re3 Qc6 20. Rg3 Rae8 21.
Qf4 Qc4 22. Qh6 Ng6 23. Bxg6 hxg6 24. Qxg6 Qf7 25. Qh6 Re5 26. Rg6 Be4 27. Rg4
Rh5 28. Qd2 Bd5 29. Rd4 Re8 30. Bg3 Qe6 31. Qd1 Rg5 32. Qd2 Kf8 33. Rd1 a5 34.
Bxd6+ Qxd6 35. Rxd5 Rxd5 36. Qxd5 Qxd5 37. Rxd5 *
Position (FEN): 4rk2/6p1/5p2/pp1R4/8/8/PPP2PPP/6K1 b - - 0 37
Black to move.
Themes:  Endgame, Rook Endgame Back Rank Mate, Mate in 1 
Puzzle rating: 591
Best move: Re1#