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 b5 7. Bb3 Bb7 8. f3
g6 9. O-O Bg7 10. a4 b4 11. Na2 a5 12. Be3 O-O 13. c3 bxc3 14. Nxc3 Nbd7 15.
Rc1 Nc5 16. Bc2 Ba6 17. Ncb5 Rb8 18. Re1 e5 *
Position (FEN): 1r1q1rk1/5pbp/b2p1np1/pNn1p3/P2NP3/4BP2/1PB3PP/2RQR1K1 w - - 0 19
White to move.
Themes:  Middlegame  
Puzzle rating: 1194
Best move: Nc6