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.