Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Modern_Variations
Moves: 1. e4 c5 2. Nf3 d6 3. Bc4 a6 4. c3 b5 5. Bb3 Nc6 6. O-O g6 7. d3 Bg7 8. Nbd2
Nf6 9. Re1 Nd7 10. Nf1 O-O 11. Ng3 a5 12. Bg5 a4 13. Bc2 h6 14. Bf4 g5 15. Be3
Nde5 16. Nh5 Nxf3+ 17. Qxf3 Ne5 18. Qe2 *
Position (FEN): r1bq1rk1/4ppb1/3p3p/1pp1n1pN/p3P3/2PPB3/PPB1QPPP/R3R1K1 b - - 2 18
Black to move.
Themes:  Middlegame  
Puzzle rating: 1240
Best move: Bg4