Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Dragon_Variation
Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Bb5+ Nbd7 8.
O-O a6 9. Ba4 b5 10. Bb3 O-O 11. Nd5 e6 *
Position (FEN): r1bq1rk1/3n1pbp/p2ppnp1/1p1N4/3NP3/1B2B3/PPP2PPP/R2Q1RK1 w - - 0 12
White to move.
Themes:  Middlegame  
Puzzle rating: 1697
Best move: Nc6