Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Najdorf_Variation
Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bc4 e5 7. Nf3 Nc6 8. Bg5
Be7 9. Bxf6 Bxf6 10. Nd5 O-O 11. Nxf6+ Qxf6 12. O-O Bg4 13. Be2 Nd4 *
Position (FEN): r4rk1/1p3ppp/p2p1q2/4p3/3nP1b1/5N2/PPP1BPPP/R2Q1RK1 w - - 4 14
White to move.
Themes:  Middlegame  
Puzzle rating: 858
Best move: Nxd4