Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Four_Knights_Variation
Moves: 1. e4 c5 2. Nf3 e6 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 Nf6 6. Be2 Bb4 7. Qd3 d5 8.
Nxc6 bxc6 9. e5 Nd7 10. f4 Qb6 11. a3 Ba6 *
Position (FEN): r3k2r/p2n1ppp/bqp1p3/3pP3/1b3P2/P1NQ4/1PP1B1PP/R1B1K2R w KQkq - 1 12
White to move.
Themes:  Middlegame  
Puzzle rating: 1294
Best move: Qxa6