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 Qc7 7. Be2 e5 8. Nb3
Be7 9. f3 Be6 10. Qd2 b5 11. O-O-O Nbd7 12. Nd5 Bxd5 13. exd5 Rc8 14. Na5 Nxd5
15. Qxd5 *
Position (FEN): 2r1k2r/2qnbppp/p2p4/Np1Qp3/8/4BP2/PPP1B1PP/2KR3R b k - 0 15
Black to move.
Themes: Queenside Attack Middlegame Mate in 1 
Puzzle rating: 558
Best move: Qxc2#