Chess puzzle (Checkmate)
Opening: Sicilian_Defense, Sicilian_Defense_Kan_Variation
Moves: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. f4 b5 7. a3 Bb7 8. Be2
Nc6 9. Be3 Nxd4 10. Qxd4 Nf6 11. O-O-O Rc8 12. e5 Nd5 13. Nxd5 *
Position (FEN): 2r1kb1r/1bqp1ppp/p3p3/1p1NP3/3Q1P2/P3B3/1PP1B1PP/2KR3R b k - 0 13
Black to move.
Themes: Queenside Attack Middlegame Mate in 1 
Puzzle rating: 430
Best move: Qxc2#