Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Lowenthal_Variation
Moves: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 5. Nxc6 bxc6 6. a3 Nf6 7. Nc3 d5 8.
exd5 cxd5 9. Bb5+ Bd7 10. Qe2 Bd6 11. Bg5 d4 12. Nd5 *
Position (FEN): r2qk2r/p2b1ppp/3b1n2/1B1Np1B1/3p4/P7/1PP1QPPP/R3K2R b KQkq - 1 12
Black to move.
Themes:  Middlegame  
Puzzle rating: 1293
Best move: Qa5+