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 