1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. b1c3  3... f8b4  4. e2e3  4... e8g8  5. a2a3 The Saemisch Variation of the Nimzo-Indian is quite risky, since White usually needs to sacrifice a pawn on the queenside, but the attack that is generated on the other side of the board makes this line very dangerous to meet in practice. 5... b4c3  6. b2c3  6... d7d6 There are other ways of playing. A normal plan is to go c5-b6-Nc6-Na5-Ba6 quickly. 7. f2f3  7... b8c6  8. e3e4  8... d8e8 The game rapidly takes on new contours. The idea of ​​this move is probably to prevent the pin with the bishop on g5. 9. h2h4 Played after a long thought. This is a plan that was prepared in a similar position, and Nepomniachtchi must have been checking the differences with the queen on e8 and not the knight on d7.