Black must play this before White can play c4-c5. The game is quickly heading toward total equality without any imbalances. But we'll still go through a little adventure to get there.
1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. g2g3  3... f8b4  4. c1d2  4... b4e7  5. f1g2  5... d7d5  6. g1f3  6... e8g8  7. e1g1  7... c7c6 This is one of the most important positions for the theory of the Catalan Opening. Black's position is very solid, and it's not easy for White to get any advantage. The check on b4 slightly disrupts White's development, which could have flowed with b3-Bb2 if the bishop was on c1. 8. d1c2  8... b8d7  9. f1d1  9... b7b6 Black simply plans to finish development with Bb7 and play c6-c5 at some point. 10. d2c3 A rare move, but played by Giri in 2024. The bishop normally goes to f4. 10... c8b7  11. b1d2  11... d8c7  12. a1c1 Gukesh's opening preparation in this game is unimpressive. Black has already equalized. 12... f8d8 A new move. 13. b2b4 