Chess puzzle (Checkmate)
Moves: 1. e4 e6 2. Nf3 d5 3. Nc3 dxe4 4. Nxe4 Be7 5. d4 Nf6 6. Bd3 Nxe4 7. Bxe4 O-O 8.
O-O Nd7 9. Bd3 b6 10. Ne5 Rb8 11. Nc6 Qe8 12. Nxb8 Nxb8 13. Qh5 h6 14. Bd2 Bb7
15. Rae1 Qc6 16. Be4 Qd7 17. Bxh6 Bxe4 18. Rxe4 gxh6 19. Qxh6 e5 20. Rxe5 Qc6
21. Qh3 Bf6 22. Re3 Qxc2 23. Rg3+ Bg7 24. Qg4 Qh7 25. Rh3 Qg6 26. Qh4 Na6 27.
Rg3 Qd6 28. a3 Rd8 29. Re1 Qxd4 30. Re8+ Rxe8 31. Qxd4 *
Position (FEN): 4r1k1/p1p2pb1/np6/8/3Q4/P5R1/1P3PPP/6K1 b - - 0 31
Black to move.
Themes:  Endgame Back Rank Mate, Mate in 1 
Puzzle rating: 640
Best move: Re1#