Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Dragon_Variation
Moves: 1. e4 c5 2. Nc3 d6 3. Nf3 Nf6 4. d4 cxd4 5. Nxd4 g6 6. Bc4 Bg7 7. O-O O-O 8. h3
Nc6 9. Be3 Bd7 10. f4 a6 11. a4 Qc8 12. Qf3 *
Position (FEN): r1q2rk1/1p1bppbp/p1np1np1/8/P1BNPP2/2N1BQ1P/1PP3P1/R4RK1 b - - 2 12
Black to move.
Themes:  Middlegame  
Puzzle rating: 1450
Best move: Nxd4