Chess puzzle (Checkmate)
Moves: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bf4 Bd6 5. Bg3 O-O 6. Nf3 b6 7. e3 Bb7 8. cxd5
exd5 9. Qc2 c5 10. dxc5 bxc5 11. O-O-O h6 12. Kb1 Bxg3 13. hxg3 c4 14. Bxc4 Qa5
15. Bb3 Na6 16. Nd4 Nb4 17. Qf5 Rac8 18. Rxh6 gxh6 19. Qxf6 Qb6 20. Qf4 Qg6+
21. Ka1 Rfd8 22. Rh1 Nd3 23. Qxh6 Qxh6 24. Rxh6 Nxf2 25. Nf5 Rc7 26. Rh5 Ne4
27. Nxe4 *
Position (FEN): 3r2k1/pbr2p2/8/3p1N1R/4N3/1B2P1P1/PP4P1/K7 b - - 0 27
Black to move.
Themes:  Middlegame Back Rank Mate, Mate in 1 
Puzzle rating: 1114
Best move: Rc1#