Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Prins_Variation
Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. f3 g6 6. c4 Nc6 7. Be3 Bg7 8. Nc3
O-O 9. Qd2 a5 10. Be2 e5 11. Nxc6 bxc6 12. O-O Bb7 13. Rfd1 Qc7 14. Rac1 Rfd8
15. Na4 Qe7 16. Qc2 Nh5 17. c5 d5 18. Nb6 Rab8 19. Qc3 *
Position (FEN): 1r1r2k1/1b2qpbp/1Np3p1/p1Ppp2n/4P3/2Q1BP2/PP2B1PP/2RR2K1 b - - 3 19
Black to move.
Themes:  Middlegame  
Puzzle rating: 1097
Best move: d4