comment: Firouzja played this line in an important tournament this year. It's clear that Nepomniachtchi was expecting it, and he came armed with some fine preparation.
context: 1. d2d4  1... d7d5  2. c2c4  2... e7e6  3. b1c3  3... c7c5  4. c4d5  4... e6d5  5. g1f3  5... b8c6  6. g2g3  6... g8f6  7. f1g2  7... c5d4  8. f3d4 