Chess puzzle (Checkmate)
Moves: 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 e6 6. Nf3 Nd7 7. Bc4 Bd6 8.
Nxf5 exf5 9. O-O Ngf6 10. Re1+ Be7 11. Qe2 Ne4 12. Ng5 O-O 13. Nxe4 fxe4 14.
Qxe4 Re8 15. Qf3 Bb4 16. Qxf7+ Kh8 17. Rxe8+ Qxe8 18. Qxe8+ Rxe8 19. Be3 b5 20.
Bd3 h6 21. c3 Ba5 22. Kf1 Nf6 23. a4 Ng4 24. Bf4 b4 25. h3 Nf6 26. c4 b3 27.
Ra3 *
Position (FEN): 4r2k/p5p1/2p2n1p/b7/P1PP1B2/Rp1B3P/1P3PP1/5K2 b - - 1 27
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 981
Best move: Re1#