1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1b5  3... g8f6  4. e1g1  4... f6e4  5. d2d4  5... e4d6  6. b5c6  6... d7c6  7. d4e5  7... d6f5  8. d1d8  8... e8d8  9. h2h3 Vachier-Lagrave is one of the very few top  players who is ready to try and break the Berlin endgame wall. 9... c8d7  10. f1d1  10... f8e7  11. g2g4  11... f5h4  12. f3h4  12... e7h4  13. b1d2  13... d8c8  14. d2f3  14... h4e7  15. c1g5 The  swap of the black bishop pair is a common theme in the Berlin. Up to here, all moves have been played in another game between the two. 15... e7c5  16. d1d3 [#] 16... b7b6  17. g5e3 Insisting on the trade, which Black needs to accept. 17... c5e3  18. d3e3  18... h7h6  19. a1d1  19... c6c5  20. f3h4 Now White wants to ramp up with his  f-pawn. 20... g7g5 Therefore, Topalov stops this at once, although this  is a serious mistake. 21. h4f5  21... d7f5  22. g4f5 Now Vachier-Lagrave is clearly better. His kingside pawn majority is strongly supported by the rooks. Moreover, the black king is far away from the kingside, and this will lead Black quickly to  disaster. 22... c8b7 One more inaccuracy. 23. g1g2  23... a8d8  24. d1d8  24... h8d8  25. g2f3 The king finds a path into the  enemy camp and penetrates there at once. 25... c5c4  26. e3e4  26... b6b5 It is  hard to call this move the decisive mistake because Black was perhaps  already lost. 27. f3g4  27... b7c8  28. e5e6  28... f7e6  29. f5e6  29... d8h8 