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  7... b4d6  8. d1c2  8... c7c6 Instead both players are entering the Carlsbad pawn structure, with a white dark-squared bishop behind the pawn chain. 9. g1e2 Without the bishop, this seems the most sensible plan for So. He is preparing a kingside attack as soon as he can.