Chess puzzle (Checkmate)
Moves: 1. e4 e5 2. Nc3 Nf6 3. f4 exf4 4. e5 Qe7 5. Qe2 Ng8 6. Nf3 d6 7. Nd5 Qd8 8.
exd6+ Be6 9. Nxc7+ Kd7 10. Ne5+ Kxd6 11. Nb5+ Ke7 12. b3 f6 13. Ba3+ Ke8 14.
Bxf8 Kxf8 15. Nf3 Bg4 16. Qc4 Qe7+ 17. Be2 Nc6 18. O-O a6 19. Nc3 Bxf3 20. Bxf3
Ne5 21. Qd5 Rd8 22. Qe4 Qc5+ 23. d4 Qxd4+ 24. Qxd4 Rxd4 25. Bxb7 Ne7 26. Bxa6
Kf7 27. Bc4+ Kg6 28. Ne2 Re4 29. Nxf4+ Kh6 30. Rf3 Nxc4 31. Rh3+ Kg5 32. Nh5
Ne5 33. Nxg7 Kg6 34. Ne6 Nf5 35. Rf1 Re8 36. Nf4+ Kf7 37. Rxh7+ Ng7 38. Nh5 Rg8
39. Rxf6+ Ke8 40. Nxg7+ Rxg7 41. Rxg7 Ng4 42. Ra6 *
Position (FEN): 4k3/6R1/R7/8/4r1n1/1P6/P1P3PP/6K1 b - - 2 42
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 414
Best move: Re1#