Black must be very careful with possible sacrifices on e6, so it's recommended to leave the bishop on c8 for now.
1. e2e4  1... c7c5  2. g1f3  2... d7d6  3. d2d4  3... c5d4  4. f3d4  4... g8f6  5. b1c3  5... a7a6 It would be a waste if a game between these two aggressive players were not a Najdorf, their favorite defense. 6. f1c4  6... e7e6  7. c1e3 In the past, the move 7.Bb3 was more or less automatic, but recently White has started to experiment with other options. 7... b7b5  8. c4b3 