Chess puzzle (Checkmate)
Moves: 1. e4 Nf6 2. d3 Nc6 3. c3 d5 4. Qf3 d4 5. h3 dxc3 6. bxc3 e5 7. Be2 Bc5 8. Qg3
g6 9. Bg5 h6 10. Bd2 Be6 11. f4 Qd6 12. f5 gxf5 13. Qg7 O-O-O 14. Qxf6 fxe4 15.
dxe4 Rhg8 16. g4 Rg6 17. Qh4 f5 18. exf5 Bxf5 19. gxf5 Rg2 20. Qh5 Rdg8 21. Nf3
e4 22. Rf1 exf3 23. Bxf3 Qe5+ 24. Kd1 Rg1 25. Be2 Ne7 26. Kc2 Rxf1 27. Bxf1
Nxf5 28. Kc1 Rg1 29. Qd1 Be3 30. h4 Bxd2+ 31. Nxd2 Ne3 32. Bh3+ Kb8 33. Nf1
Qxc3+ 34. Kb1 Qb4+ 35. Qb3 Qe1+ 36. Kb2 Qe2+ 37. Ka3 Nc2+ 38. Qxc2 Qxc2 39. Re1
Qf2 *
Position (FEN): 1k6/ppp5/7p/8/7P/K6B/P4q2/4RNr1 w - - 2 40
White to move.
Themes:  Endgame Back Rank Mate, Mate in 1 
Puzzle rating: 610
Best move: Re8#