Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Other_variations
Moves: 1. e4 c5 2. Qh5 d6 3. Bc4 e6 4. f4 Nf6 5. Qf3 a6 6. a3 Be7 7. Ne2 Nc6 8. c3 Bd7
9. O-O h6 10. d4 cxd4 11. Nxd4 Qc7 12. Be3 *
Position (FEN): r3k2r/1pqbbpp1/p1nppn1p/8/2BNPP2/P1P1BQ2/1P4PP/RN3RK1 b kq - 2 12
Black to move.
Themes:  Middlegame  
Puzzle rating: 1642
Best move: Nxd4