All of this has been seen many times before, and it is one of the biggest mainlines of the Najdorf. Now, in modern times, people have been trying …Nh5 here, with interesting complications to follow—I played this move myself once against Areschenko in a tiebreak game at last year's World Cup. But, Firouzja goes for the old mainline.
1. e2e4  1... c7c5 Props to Firouzja for willingly entering super sharp territory. This is the attitude needed to win an event like this one, even if it backfired in this particular game. 2. g1f3  2... d7d6  3. d2d4  3... c5d4  4. f3d4  4... g8f6  5. b1c3  5... a7a6  6. f2f3  6... e7e5  7. d4b3  7... c8e6  8. c1e3  8... f8e7  9. d1d2  9... e8g8  10. e1c1  10... b8d7  11. g2g4  11... b7b5 