Chess puzzle (Checkmate)
Moves: 1. e4 e5 2. Nf3 Nc6 3. d4 d6 4. d5 Nce7 5. Nc3 g6 6. Be3 Bg7 7. Qd2 Nf6 8. h3
a6 9. Be2 O-O 10. g4 c6 11. Bh6 cxd5 12. Bxg7 Kxg7 13. g5 Nh5 14. Nxd5 Nxd5 15.
exd5 Nf4 16. O-O-O Nxh3 17. Qb4 Nxf2 18. Qh4 Nxh1 19. Rxh1 Rh8 20. Qh6+ Kg8 21.
Nd2 Bf5 22. Bd3 Bxd3 23. cxd3 Rc8+ 24. Kb1 Qc7 25. Ne4 Qc2+ 26. Ka1 Qc1+ 27.
Rxc1 *
Position (FEN): 2r3kr/1p3p1p/p2p2pQ/3Pp1P1/4N3/3P4/PP6/K1R5 b - - 0 27
Black to move.
Themes:  Endgame Back Rank Mate, Mate in 1 
Puzzle rating: 599
Best move: Rxc1#