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.