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. 18. d2c4  18... d7e5  19. c4e5  19... g7e5  20. a2b4  20... c5b4  21. a3f3  21... c8d7  22. b2b3  22... b6b5 The doubled black pawns do a tremendously good job  both depriving the white pieces of squares along the c-file and providing  some outposts for the black pieces. On the other hand Vachier-Lagrave can  be happy with the trade of the knights as this makes White's planned  kingside attack difficult to execute. 23. c1e3  23... a7a8  24. a4b5  24... a6b5  25. e3d4 