A prophylactic move against the sacrifice, but now Black is fine.
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  8... f8e7 Black must be very careful with possible sacrifices on e6, so it's recommended to leave the bishop on c8 for now. 9. a2a3 White doesn't mind playing slowly to prevent the b5-b4 advance. The plan is not as brutal as usual in the 6.Bc4 line, when White usually plays f4-f5 to open the bishop's diagonal. Here the intentions are different. 9... e8g8  10. d1e2  10... c8b7  11. f2f3 White plans the traditional attack on the kingside with the advance of the pawns with g4-g5-h4-h5 and so on. 11... b8c6 A move that Vachier-Lagrave had played himself. 12. e1c1  12... c6a5 Black has other options. 13. c1b1  13... a8c8 Keeping an eye on the typical exchange sac on c3, but this move is not the most accurate.