1. g1f3  1... d7d5  2. g2g3  2... g7g6  3. f1g2  3... f8g7  4. d2d4  4... g8f6  5. e1g1  5... e8g8  6. c2c4  6... c7c6  7. d1a4 A relatively rare move, championed by Oparin. 7... f6d7 Erigaisi played this without much hesitation. The text move initiates a nice regrouping by Black. 8. a4b3 This and the next few moves were played practically in a blitz tempo by Praggnanandhaa. 8... a7a5 A novelty, although the advance of the a-pawn is a common theme in the Grunfeld. 9. c4d5  9... a5a4 The point. 10. b3d1  10... c6d5 