Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Alapin_Variation
Moves: 1. e4 c5 2. c3 d6 3. d4 cxd4 4. cxd4 Nf6 5. d5 Bd7 6. Nc3 g6 7. Nf3 Bg7 8. Bd3
O-O 9. O-O Bg4 10. h3 Bxf3 11. Qxf3 Nbd7 12. Qe2 a6 13. f4 Nh5 14. Qf3 e5 15.
f5 Nc5 16. Bc2 Qb6 17. Kh2 Nf4 18. b3 Rac8 19. Bxf4 *
Position (FEN): 2r2rk1/1p3pbp/pq1p2p1/2nPpP2/4PB2/1PN2Q1P/P1B3PK/R4R2 b - - 0 19
Black to move.
Themes:  Middlegame  
Puzzle rating: 918
Best move: exf4