The right square to attack. The  passer is about to start moving.
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  25... h8a8 Kramnik traded a pair of rooks, thus relieving  his kingside situation and also gaining an open file. 26. f4f5  26... g6f5  27. g4f5  27... a8a2  28. d2c1  28... b4c3  29. b2c3  29... e7a3 Black is faster on the queenside, and it  makes sense for him to enter an endgame. 30. c2b1  30... a3c1 Straightforward but not optimal. 31. f1c1  31... a2b2  32. f5f6 Anand is creating a "reserved passer." Technically speaking, the f6-pawn is not a passer, but it is dangerously close to the  promotional square. 32... b6a4  33. b1h7  33... c6a5 And once that defender  leaves, the fireworks start.