Chess puzzle (Checkmate)
Moves: 1. Nf3 Nf6 2. c4 e6 3. Nc3 d5 4. e3 c5 5. cxd5 exd5 6. Bb5+ Nc6 7. d4 cxd4 8.
Nxd4 Bd7 9. O-O Bd6 10. b3 O-O 11. Bb2 Re8 12. Rc1 Rc8 13. Be2 a6 14. h3 Ne5
15. Nf3 Bc6 16. Qd4 Ne4 17. Nxe4 dxe4 18. Nd2 f5 19. Nc4 Bb8 20. Nb6 Qxd4 21.
exd4 Nd3 22. Bxd3 exd3 23. Nxc8 Rxc8 24. Rfd1 d2 25. Rc2 Bf4 26. d5 Re8 27.
Rdxd2 *
Position (FEN): 4r1k1/1p4pp/p1b5/3P1p2/5b2/1P5P/PBRR1PP1/6K1 b - - 0 27
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 838
Best move: Re1#