Chess puzzle (Checkmate)
Moves: 1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Nxd4 c5 5. Bb5+ Bd7 6. Bxd7+ Nxd7 7. Nf3 Ngf6
8. Bg5 Be7 9. Nbd2 O-O 10. O-O Qb6 11. Rb1 Rad8 12. b4 cxb4 13. c3 a5 14. cxb4
axb4 15. a3 Qa7 16. axb4 b5 17. Qe2 Rb8 18. Be3 Qc7 19. Nd4 Ne5 20. Nxb5 Qc6
21. Nd4 Qb7 22. b5 Nxe4 23. Nxe4 Qxe4 24. Rfc1 f5 25. Ne6 Rf6 26. Nc7 Rg6 27.
f3 Nxf3+ 28. Kh1 Nd4 29. Qc4+ Kh8 30. Rb2 Qxe3 31. Nd5 Qe6 32. Qc7 Re8 33. Nxe7
Rxe7 34. Qxe7 Qg8 35. b6 Re6 36. Qd7 h5 37. Rc8 *
Position (FEN): 2R3qk/3Q2p1/1P1pr3/5p1p/3n4/8/1R4PP/7K b - - 1 37
Black to move.
Themes:  Endgame Back Rank Mate, Mate in 1 
Puzzle rating: 693
Best move: Re1#