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. Bg5 e5 7. Nb3 Be7 8. h4
h6 9. Be3 b5 10. Be2 Bb7 11. f3 Nh5 12. Qd2 Bxh4+ 13. Kf1 Ng3+ 14. Kg1 Nxh1 15.
Kxh1 Bg3 16. Kg1 Qh4 17. Qxd6 Bf4 *
Position (FEN): rn2k2r/1b3pp1/p2Q3p/1p2p3/4Pb1q/1NN1BP2/PPP1B1P1/R5K1 w kq - 1 18
White to move.
Themes:  Middlegame  
Puzzle rating: 1501
Best move: Bxf4