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  11. e1g1  11... b8d7  12. a2a4 A standard reaction.