Chess puzzle (Checkmate)
Moves: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. Nf3 Nc6 7. Be3 cxd4 8. Nxd4
Bc5 9. Qd2 O-O 10. O-O-O a6 11. Qf2 Qe7 12. h4 Nxd4 13. Bxd4 b5 14. Bd3 b4 15.
Ne2 a5 16. Rh3 Ba6 17. h5 Rfc8 18. Rg3 a4 19. Kb1 a3 20. b3 Bxd4 21. Nxd4 Nc5
22. f5 Nxd3 23. cxd3 Kh8 24. Rxg7 Qc5 25. Rxf7 Bxd3+ 26. Ka1 Qc1+ 27. Rxc1 *
Position (FEN): r1r4k/5R1p/4p3/3pPP1P/1p1N4/pP1b4/P4QP1/K1R5 b - - 0 27
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 689
Best move: Rxc1#