Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Old_Sicilian
Moves: 1. e4 c5 2. Nf3 Nc6 3. Bd3 g6 4. c3 d5 5. O-O Bg7 6. Re1 dxe4 7. Bxe4 Qc7 8. d4
cxd4 9. cxd4 Bg4 10. Nc3 Nxd4 11. Qa4+ Bd7 12. Qxd4 *
Position (FEN): r3k1nr/ppqbppbp/6p1/8/3QB3/2N2N2/PP3PPP/R1B1R1K1 b kq - 0 12
Black to move.
Themes:  Opening  
Puzzle rating: 872
Best move: Bxd4