Chess puzzle (Checkmate)
Moves: 1. e4 c5 2. d4 cxd4 3. c3 g6 4. cxd4 d5 5. e5 Nc6 6. Nf3 Bg4 7. Be2 e6 8. O-O
Nge7 9. h3 Bxf3 10. Bxf3 Bg7 11. Bg5 O-O 12. Nc3 Qb6 13. Qe1 Nf5 14. Na4 Qxd4
15. b3 Qxe5 16. Qd2 b6 17. Bf4 Qd4 18. Qc1 Rac8 19. Bh2 Qxa1 20. Qxa1 Bxa1 21.
Rxa1 Ncd4 22. Bg4 h5 23. Bxf5 Nxf5 24. Nb2 Rc2 25. Nd3 Rfc8 26. Ne5 Rc1+ 27.
Rxc1 *
Position (FEN): 2r3k1/p4p2/1p2p1p1/3pNn1p/8/1P5P/P4PPB/2R3K1 b - - 0 27
Black to move.
Themes:  Endgame Back Rank Mate, Mate in 1 
Puzzle rating: 457
Best move: Rxc1#