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. h3 b5 7. a4 b4 8. Nd5
Nxd5 9. exd5 Qa5 10. Bc4 Bb7 11. Qf3 Nd7 12. Bf4 Nf6 13. O-O Bxd5 14. Qb3 Qc5
15. Bxd5 Qxd5 16. Qxd5 *
Position (FEN): r3kb1r/4pppp/p2p1n2/3Q4/Pp1N1B2/7P/1PP2PP1/R4RK1 b kq - 0 16
Black to move.
Themes:  Middlegame  
Puzzle rating: 624
Best move: Nxd5