Grischuk has done his  homework well. With his move he uncorked a strong novelty that immediately led to a large advantage for White.
1. d2d4  1... d7d5  2. c2c4  2... c7c6  3. g1f3  3... g8f6  4. e2e3  4... e7e6  5. f1d3  5... b8d7  6. b2b3  6... b7b6  7. e1g1  7... c8b7  8. c1b2  8... d5c4  9. b3c4  9... c6c5 