1. d2d4  1... g8f6  2. c2c4  2... g7g6  3. b1c3  3... f8g7  4. e2e4  4... d7d6  5. f1e2  5... e8g8  6. c1e3 A form of the Averbakh system, where the bishop is provocatively placed on the g5-square. The oldest living GM just turned 100, and this is a good occasion to honor him $1 6... e7e5 6...Na6 is the other main line. 7. d4d5  7... b8a6  8. h2h4 That is the major point behind the Averbakh system. By delaying the development of his kingside knight, White keeps the path for his pawns opened. 8... a6c5 After some thought, Grischuk deviated from an earlier game of his. 9. d1c2 Nakamura is practically blitzing his moves. 9... c7c6  10. h4h5  10... c6d5  11. c4d5  11... d8a5  12. h5h6 A modern treatment of the position. In the past, the Averbakh adherents used their kingside pawns to try and completely seal that part of the board. Nakamura tries \"only\" to lock the bishop—ideally forever. 12... g7h8  13. f2f3  13... c8d7  14. a1b1  14... c5a4 Grischuk creates some queenside trouble, just in time. 15. c2d2  15... a4c3  16. b2c3  16... a5c7 [#] 17. g2g4 This novelty was also blitzed out. White enjoys more space and better perspectives on both flanks. 17... d7c8 A nice regrouping. 18. g1h3  18... f6d7  19. h3f2 At last some thought by the American GM, who as expected was way ahead on the clock. 19... h8f6 Out, in freedom $1 20. e1g1  20... f6e7  21. g1h2  21... d7c5  22. f2d3 The black knight is a key piece and needs to leave. 22... b7b6 Ultimately Grischuk decided to defend as Demchenko did, allowing the opening of the b-file. 23. d3c5  23... b6c5  24. f3f4 That is the difference in comparison to the above-mentioned stem game. White can open a second front on the kingside. It turns out that the h-pawn was not only good for blocking the black dark-squared bishop. 24... e5f4 Black cannot afford to let a pawn get to the f5-square. 25. e3f4  25... c8d7 Now it is all about the long diagonal; who will have it $2 26. c3c4  26... a8b8 Only this move seems like a serious inaccuracy by Black. 27. d2c3 Now the long diagonal is in White's hands. 27... f7f6  28. b1b3 Nothing should be forced yet. Plus, both sides are trying to force the opponent to make a concession and capture first. 28... b8b6 One more inaccuracy. Grischuk might have missed White's next idea. 29. g4g5  29... f8f7  30. f4c1 The long diagonal it is $1 30... c7d8  31. c1b2  31... d8f8  32. h2g2 One more accurate move. Grischuk will be soon running out of moves. 32... e7d8  33. c3f3  33... d7c8  34. f3e3 One last preparation. 34... b6b3  35. a2b3  35... f6g5 Now it is all happening by force.