Chess puzzle (Checkmate)
Opening: Sicilian_Defense, Sicilian_Defense_Modern_Variations
Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Qf3 Bg4 6. Qg3 Qc8 7. Nc3 a6 8.
Bd3 g6 9. Nd5 Nxd5 10. exd5 Bg7 11. c3 Bxd4 12. cxd4 Bf5 13. Bxf5 Qxf5 14. Qb3
Qe4+ 15. Be3 Qxg2 16. O-O-O b5 17. Rdg1 Qe4 18. Qc3 Qxd5 *
Position (FEN): rn2k2r/4pp1p/p2p2p1/1p1q4/3P4/2Q1B3/PP3P1P/2K3RR w kq - 0 19
White to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 422
Best move: Qc8#