1. d2d4  1... d7d6  2. e2e4  2... g7g6  3. g1f3  3... g8f6  4. b1c3  4... f8g7 Nepomniachtchi needs to win,  therefore he plays the "irregular" Pirc. 5. c1e3  5... c7c6  6. d1d2  6... d8a5  7. f1d3  7... c8g4  8. f3g1  8... e7e5  9. h2h3  9... g4e6  10. g1f3  10... h7h6 