Chess puzzle (Checkmate)
Opening: Sicilian_Defense, Sicilian_Defense_Accelerated_Dragon
Moves: 1. e4 c5 2. d4 cxd4 3. Nf3 Nc6 4. Nxd4 g6 5. c4 Bg7 6. Be3 Nf6 7. Nc3 Ng4 8.
Qxg4 Nxd4 9. Qd1 e5 10. Ne2 Qa5+ 11. Bd2 Qb6 12. Bc3 O-O 13. g3 *
Position (FEN): r1b2rk1/pp1p1pbp/1q4p1/4p3/2PnP3/2B3P1/PP2NP1P/R2QKB1R b KQ - 0 13
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 1060
Best move: Nf3#