1. d2d4  1... g8f6  2. c2c4  2... g7g6  3. g1f3  3... f8g7  4. e2e3  4... e8g8  5. f1e2  5... c7c5  6. d4d5 A modern  Anti-Gruenfeld trend. White is ready to transpose into the Benoni, even  though he is a tempo down! 6... d7d6  7. b1c3  7... e7e6  8. f3d2  8... b8a6  9. e1g1  9... f8e8  10. e3e4  10... a6c7  11. a2a4 Basically, White is ready to  argue that the maneuver Nb8-a6-c7 isn't that effective for Black.  Topalov's last move prevents the possible b7-b5 advance after the trade in the center. But it also has a drawback as it weakens the b4 square. 11... b7b6  12. f1e1  12... c7a6 Vachier-Lagrave decided that the moment for the maneuver had come. 13. h2h3  13... a6b4  14. a1a3 The rook is ready to be transferred towards the  center or the kingside. 14... e6d5 Clarifying the position in the  center. 15. c4d5  15... a7a6  16. e2f1  16... f6d7  17. c3a2  17... a8a7 In the Benoni Black is often ready to trade on the b4 and d4 squares in order to either open a file for his  rooks, or an outpost for his knight.