1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. b1c3  3... d7d5  4. c4d5  4... f6d5 So needed to hold in this game  in order to wrap up the match, and his choice is the very well analyzed  Improved Tarrasch Defense. 5. e2e4  5... d5c3  6. b2c3  6... c7c5  7. a1b1 Nepomniachtchi  decided to keep as many pieces as he can on board, for the aforementioned  reason. 7... f8e7  8. g1f3  8... e8g8  9. h2h4 In the spirit of the Grunfeld Defense. Up to here the  players followed another game of So, versus Ding Liren. 9... b7b6 This is considered to be a side line. 10. h4h5 