1. d2d4  1... g8f6  2. g1f3  2... g7g6  3. g2g3  3... f8g7  4. f1g2  4... d7d5  5. e1g1  5... e8g8  6. c2c4  6... c7c6  7. d1b3  7... d8b6 A  calm variation of the Grunfeld, where the onus is put on slow, lenghty  improvement of the pieces. 8. b1c3  8... f8d8  9. c1d2  9... d5c4  10. b3c4  10... c8e6  11. c4a4  11... e6f5  12. f1c1 A novelty upon a game of Nepomniachtchi. 12... b8d7  13. b2b4  13... f6e4 In order to soften the long diagonal. Black also  has less space so the trades make sense. 14. e2e3  14... e4c3 Completing the plan. 15. d2c3  15... f5e4  16. a4b3  16... e4d5  17. b3c2  17... d7f6  18. f3e5 There is no other way to get rid of the annoying bishop. 18... d5g2  19. g1g2  19... f6d5  20. e5d3 Both  players can be happy with the opening outcome. Nepomniachtchi can state  that his position is solid and his remaining light pieces are good while  Giri has kept the space advantage. 20... b6c7  21. a2a4  21... a8c8  22. a1b1  22... h7h5  The beginning of a suicide mission. 23. h2h3 Therefore Nepomniachtchi quickly pushes the pawn up: 23... h5h4  24. g3h4 Just like that! It transpires that the black kingside has  been weakened, not the other way around. 24... g7f6  25. h4h5 Giri has more room to maneuver with his pieces and  quicker access to the kingside; therefore, he is eager to open many files.  25... g6g5  26. d3c5 The beginning of a nice maneuver. 26... g8g7  27. c5e4  27... d8h8  28. c2e2  28... h8h6  29. b4b5  29... c8h8  30. e4g3 Mission accomplished. The  h5-pawn plugs the holes on the kingside, and White can look again at the  opposite wing. 30... e7e6  31. c3d2  31... f6e7  32. b5c6  32... b7c6  33. e2a6 Winning a  second pawn. Giri only needs to be careful not to get checkmated on the  opposite side. 33... c7d8  34. a6c6  34... d5f6  35. b1b7  35... f6h5  36. b7d7  36... d8f8  37. d4d5  37... h5g3  38. f2g3 Prosaic. 38... h6h3  39. d2c3  39... g7g6  40. c3h8  40... f8h8  41. d5e6  41... h3h2  42. g2g1 The queen  on c6 safely covers the king from afar and is looking for a good moment to lead her pieces to mate. 42... f7f5  43. d7e7  43... h8h3 The window of  opportunity opens: 44. c6e8 With forced mate after: 44... g6f6 