The poor knight worked hard in this game.
1. c2c4  1... c7c5  2. g2g3  2... b8c6  3. f1g2  3... g7g6  4. b1c3  4... f8g7  5. d2d3  5... d7d6  6. d1d2 [%c_effect d2;square;d2;type;Interesting;persistent;true] This looks like an ugly move, but it has a clear positional foundation. White wants to develop the bishop with b3-Bb2. After completing this plan, the queen no longer looks so silly on d2. 6... g8f6 Black has several plans at his disposal. 7. b2b3  7... e8g8  8. c1b2  8... c8d7 [%c_effect d7;square;d7;type;Inaccuracy;persistent;true] This is a bit passive. 9. g1f3  9... a8b8  10. e1g1  10... a7a6 Anand wants to play b7-b5, gaining space on the queenside. 11. c3d5  11... e7e6 [%c_effect e6;square;e6;type;Inaccuracy;persistent;true] Anand was critical of this move after the game. He mentioned he should have played e5. 12. d5f6  12... g7f6  13. d3d4 [%c_effect d4;square;d4;type;GreatFind;persistent;true] The players felt this position was already unpleasant for Black. White has more space and a better pawn structure. All this had been played before in an amateur game. 13... b7b5 [%c_effect b5;square;b5;type;Inaccuracy;persistent;true] 14. d4c5  14... f6b2  15. d2b2  15... d6c5  16. c4b5  16... a6b5  17. f1c1 It turns out that the c5-pawn is doomed. 17... c5c4  18. b3c4  18... b5c4  19. b2c3  19... e6e5  20. c3c4 Black has some practical drawing chances in a rapid game, but against Carlsen it's nearly impossible to escape in a technical position. 20... d8e7  21. h2h4 Not an easy move. It gives the knight support on the g5-square, preparing to meet 21...e4. 21... f8c8  22. c4e4  22... d7f5  23. e4e3  23... e5e4  24. f3g5  24... c6b4 Anand is trying his best to complicate the game. 25. c1c8 [%c_effect c8;square;c8;type;Inaccuracy;persistent;true] 25... b8c8  26. g2e4  26... b4c2 [%c_effect c2;square;c2;type;GreatFind;persistent;true] This is Anand's idea. 27. e4c2  27... e7e3  28. f2e3  28... c8c2  29. g1f1  29... f5c8 [%c_effect c8;square;c8;type;GreatFind;persistent;true] With resourceful play Anand has achieved drawing chances. 30. g5f3  30... c8a6  31. f3d4  31... c2c3  32. f1f2  32... c3a3  33. d4c2  33... a3a4  34. a2a3 Carlsen methodically prepares the advance of the a-pawn. 34... a6b7  35. c2b4  35... g8g7  36. b4d3  36... a4a5  37. a1b1  37... b7d5  38. b1a1  38... d5e4  39. d3b2 So far Anand showed great defensive skills in a difficult position, but now he makes a mistake. 39... g7h6 [%c_effect h6;square;h6;type;Inaccuracy;persistent;true] The plan to activate the king leads nowhere. It's better to exchange pawns with 40. b2c4  40... a5a6  41. a3a4  41... h6h5 