B99 Sicilian, Najdorf, 7...Be7 Main line (1 e4 c5 2 Sf3 d6 3 d4 cxd4 4 Sxd4 Sf6 5 Sc3 a6 6 Lg5 e6 7 f4 Le7 8 Df3 Dc7 9 O-O-O Sbd7)