Kramnik traded a pair of rooks, thus relieving  his kingside situation and also gaining an open file.
1. e2e4  1... e7e6  2. d2d4  2... d7d5  3. b1c3  3... g8f6  4. e4e5  4... f6d7  5. f2f4  5... c7c5  6. g1f3  6... b8c6  7. c1e3  7... f8e7  8. d1d2  8... a7a6  9. f1d3 Provoking Black's next queenside expansion. 9... b7b5  10. a2a3  10... c5c4  11. d3e2 The center is blocked, and both sides have  clear plans. White is playing on the kingside and Black on the opposite  wing, disregarding where the opponent is going to castle. 11... d7b6  12. e1g1  12... c8d7  13. e2d1 A novelty and a nice, multifunctional move.  Anand can regroup his pieces now in various ways, like Nc2-e2-g3 or  Qd2-f2-g3, but above all he can bring his light-squared bishop into the  game with c2-c3 and Bd1-c2 to support the f4-f5 advance. 13... g7g6  14. h2h3  14... d8c7 Kramnik prepares the king evacuation on the  queenside. 15. e3f2 While Anand uses the weakened d8-h4 diagonal to offer a favorable bishop trade. 15... h7h6 A useful move that adds control  to the g5-square and sets up a nice trap. 16. c3e2 White is alert. 16... a6a5  17. c2c3  17... e8c8  18. f2h4  18... e7h4  19. f3h4  19... c8b7  20. h4f3  20... d8a8  21. d1c2  21... c7d8  22. g2g4 Here Anand seemed to rush a bit. 22... d8e7  23. e2g3  23... b5b4 Less experienced players might be somewhat puzzled that both  great players are attacking on the sides where their kings are. This,  however, is the right approach as both sides need to destroy the  opponent's pawn chains from their roots as Nimzowitsch taught us. 24. a3b4  24... a5b4  25. a1a8 