Carlsen wants to occupy the d4 square in the most convenient  way.
1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1b5  3... g8f6  4. d2d3 Not yet an endgame with you, Mr  Carlsen. 4... f8c5  5. b5c6  5... d7c6  6. e1g1  6... c8g4 The most annoying reply for the first player. Once that he  castled, he needs to think twice if he really wants to break the pin with  the g2-g4 move. 7. h2h3  7... g4h5  8. b1d2  8... f6d7  9. d2c4  9... f7f6  10. a1b1 A  novelty which intends to dispatch the black bishop from the a7-g1  diagonal. 10... a7a5 Carlsen wants his bishop on the diagonal. 11. c1d2  11... b7b6  12. d2e3  12... c5e7 Now that the e3 square is occupied by the white  bishop, Black can retreat. 13. b2b3 White is arranging his pawns according to Capablanca's rule: on  the opposite color of his own bishop. Make no mistake though, this is  purely defensive here as they are not moving anywhere.