Showing a profound understanding of the position and of  the game itself.
1. d2d4  1... g8f6  2. c2c4  2... g7g6  3. h2h4 A frequent Anti-Grunfeld line at the World Cup. 3... f8g7  4. b1c3  4... d7d6  5. e2e4  5... b8c6  6. d4d5  6... c6e5  7. f1e2  7... h7h5 Carlsen is trying to benefit from the h2-h4 move. He secures the position of his centralized knight. 8. c1f4 Fedoseev  replies with a novelty. This is his way of fighting the knight: by trading it. 8... e8g8  9. g1f3  9... e5f3  10. g2f3  10... c7c6  11. d1d2  11... c6d5  12. c4d5  12... g8h7 It is important to prevent the swap  of this bishop. It might have a bright future... 13. a2a4  13... f6d7 But since the white king has remained in the center, Black  would be happy to open the files for his pieces. 14. a4a5  14... f7f5  15. a1a3 The rook protects the f3-pawn, while at the same time it is ready to add pressure on the queenside. 15... d7e5  16. f4e3 Black has made a lot of progress and now comes with a brilliant idea. 16... f5f4 Carlsen opens the file, and this is just  the beginning. 17. e3f4 White has no choice. 17... c8d7 A neat move! Now that the development is finished, Carlsen is ready to occupy the f-file. 18. c3d1 