Chess puzzle (Checkmate)
Moves: 1. Nf3 Nf6 2. b3 d5 3. Bb2 c5 4. e3 Nc6 5. Bb5 Bd7 6. Bxc6 Bxc6 7. Ne5 e6 8.
Nxc6 bxc6 9. O-O Bd6 10. Qf3 O-O 11. Bxf6 Qxf6 12. Qxf6 gxf6 13. Nc3 a5 14. a4
Be5 15. Rad1 Bxc3 16. dxc3 Rab8 17. e4 Rfd8 18. exd5 cxd5 19. Rb1 e5 20. f4 e4
21. f5 d4 22. Rf4 e3 23. cxd4 cxd4 24. Rd1 Rbc8 25. Rfxd4 Rxd4 26. Rxd4 Rxc2
27. Re4 *
Position (FEN): 6k1/5p1p/5p2/p4P2/P3R3/1P2p3/2r3PP/6K1 b - - 1 27
Black to move.
Themes:  Endgame, Rook Endgame Mate in 1 
Puzzle rating: 1062
Best move: Rc1#