Chess puzzle (Checkmate)
Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Nf6 6. Be2 g6 7. Be3 Bg7 8. f3
Bd7 9. Qd2 a6 10. h4 h5 11. O-O-O Rc8 12. Kb1 b5 13. Nd5 Nxd5 14. exd5 Ne5 15.
Bg5 Nc4 16. Bxc4 Rxc4 17. c3 Bxd4 18. cxd4 Bf5+ 19. Ka1 Qc7 20. Rhe1 e6 21.
dxe6 fxe6 22. d5 e5 23. Rc1 Kd7 24. Rxc4 Qxc4 25. Rc1 Qd3 26. Qa5 Rc8 27. Rxc8
*
Position (FEN): 2R5/3k4/p2p2p1/Qp1PpbBp/7P/3q1P2/PP4P1/K7 b - - 0 27
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 1553
Best move: Qb1#