Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Closed
Moves: 1. e4 c5 2. Nc3 Nc6 3. g3 e6 4. Bg2 g6 5. f4 Bg7 6. e5 d5 7. d3 a6 8. Nge2 d4
9. Ne4 Nge7 10. Nd6+ Kf8 11. b3 Nf5 12. Nxf5 exf5 13. Ba3 *
Position (FEN): r1bq1k1r/1p3pbp/p1n3p1/2p1Pp2/3p1P2/BP1P2P1/P1P1N1BP/R2QK2R b KQ - 1 13
Black to move.
Themes:  Middlegame  
Puzzle rating: 1200
Best move: Qa5+