context: 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 