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. 12... a5c7  13. a4a5  13... g6g5 Risky, but the only option under the circumstances.  14. d2e2 Not the best square for her Majesty. 14... g5g4  15. h3g4  15... e6g4 Now the pin is super annoying but Giri had a  plan. 16. c3b1  16... f6h5 Nepomniachtchi follows his plan. 17. c2c3  17... h8g8  18. b1d2  18... e8c8  19. e2e1 This was Giri's idea. The pin is broken. 19... g7f6 Creating concrete threats along the half-open file. 20. g1h1  20... f6g5  21. f3h2  21... g5e3 Nepomniachtchi got what he wanted and now goes for an  extremely sharp line. 22. e1e3 