Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Other_variations
Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 e5 5. Nf3 a6 6. Nc3 g6 7. Nd5 Bg7 8. c4
Nc6 9. Be3 Nf6 10. Bb6 Qd7 11. Be2 O-O 12. Qc2 Nb4 *
Position (FEN): r1b2rk1/1p1q1pbp/pB1p1np1/3Np3/1nP1P3/5N2/PPQ1BPPP/R3K2R w KQ - 9 13
White to move.
Themes: Hanging Piece Middlegame  
Puzzle rating: 1157
Best move: Nxb4