Chess puzzle (Checkmate)
Opening: Sicilian_Defense, Sicilian_Defense_Najdorf_Variation
Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nb3 Be6 8. f3
h5 9. Qd2 Nbd7 10. O-O-O b5 11. h3 Qc7 12. g4 hxg4 13. fxg4 Rc8 14. Be2 b4 15.
Nd5 Bxd5 16. exd5 a5 17. Bb5 Nxd5 18. Qxd5 *
Position (FEN): 2r1kb1r/2qn1pp1/3p4/pB1Qp3/1p4P1/1N2B2P/PPP5/2KR3R b k - 0 18
Black to move.
Themes: Queenside Attack Middlegame Mate in 1 
Puzzle rating: 540
Best move: Qxc2#