Carlsen is OK with the trades. The sooner an  endgame emerges, the faster he would digest the e6-pawn as the endgame is  a nightmare scenario for White.
1. e2e4  1... c7c5  2. g1f3  2... b8c6  3. f1b5 The Rossolimo discussion continues between the two top players. 3... g7g6  4. e1g1  4... f8g7  5. b5c6  5... b7c6  6. f1e1  6... d8c7  7. h2h3  7... d7d6  8. c2c3  8... g8f6  9. d2d4  9... c5d4  10. c3d4  10... e8g8  11. b1c3  11... c8b7  12. e4e5 A  logical novelty. Giri needs to act before his opponent consolidates and  makes use of his main trumps: the bishop pair and the wider center. 12... d6e5  13. d4e5  13... f8d8  14. d1c2  14... f6d5  15. c3d5  15... d8d5  16. e5e6 Causing some trouble to the enemy's  castling position. 16... f7f6  17. c1e3  17... a7a5 Flexible and strong. The  world champion is not afraid of a blockade. 18. e3c5 White would love to keep the position this way with the black  bishops at bay. 18... b7a6  19. a1c1 A tricky move. The black bishop is lured away from  the long diagonal. 19... g7h6  20. c5e3 In order to deprive the opponent of the bishop pair. 20... h6e3  21. e1e3 