Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Moscow_Variation
Moves: 1. e4 c5 2. Nf3 d6 3. Bb5+ Nd7 4. O-O a6 5. Bxd7+ Qxd7 6. d4 cxd4 7. Nxd4 e6 8.
Nc3 Nf6 9. f3 Be7 10. Be3 O-O 11. g4 b5 12. a3 Bb7 13. Qd3 h6 14. Bf2 Rac8 15.
h4 Qc7 16. g5 hxg5 17. hxg5 Nh5 18. Be3 e5 19. Nf5 Nf4 *
Position (FEN): 2r2rk1/1bq1bpp1/p2p4/1p2pNP1/4Pn2/P1NQBP2/1PP5/R4RK1 w - - 2 20
White to move.
Themes:  Middlegame  
Puzzle rating: 1487
Best move: Bxf4