1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. b1c3  3... f8b4  4. e2e3  4... e8g8  5. f1d3  5... d7d5  6. c4d5  6... e6d5  7. a2a3 This variation has become a very hot trend as of late, and I have no idea why. Vidit has lost this position three times with the black pieces, but he always seemed better out of the opening in all three games $1 In more recent times, it seems like the variation is one you choose when you want to lose with White to a lower-rated player, and badly—the So-Sevian game comes to mind as well. According to my understanding of chess, it cannot be right to go for a Carlsbad structure with the c1-bishop looked inside the pawn chain. 7... b4d6  8. d1c2  8... b8a6 This move has already been tried by Oparin in 2022, and he is generally very well prepared. It looks a bit weird to me and I certainly don't think it is the only way to a comfortable position, but Black should be fine.