Chess puzzle (Checkmate)
Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Qf3
Qc7 9. O-O-O Nbd7 10. g4 h6 11. Bxf6 Bxf6 12. h4 b5 13. Bxb5 axb5 14. Ndxb5 Qc6
15. Nxd6+ Kf8 16. Nxc8 Rxc8 17. Qd3 Bxc3 18. Qxd7 Bxb2+ 19. Kxb2 Qc3+ 20. Kc1 *
Position (FEN): 2r2k1r/3Q1pp1/4p2p/8/4PPPP/2q5/P1P5/2KR3R b - - 2 20
Black to move.
Themes: Queenside Attack Endgame Mate in 1 
Puzzle rating: 832
Best move: Qxc2#