Avoiding Be5, even at the cost of another pawn.
1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. d2d4  3... e5d4  4. f3d4  4... g8f6  5. d4c6  5... b7c6  6. e4e5  6... d8e7  7. d1e2  7... f6d5  8. b1d2 This isn't the most popular move, but it was played a few days ago by Erigaisi in a rapid online game, which certainly hasn't escaped Carlsen's team's attention. 8... d5f4  9. e2e3  9... f4d5  10. e3e4  10... f7f6  11. c2c4 A new move, played after a long think. This indicates that Carlsen was out of his preparation. His move is an interesting pawn sacrifice. 11... d5b4  12. e1d1  12... e7e5  13. a2a3  13... e5e4  14. d2e4  14... b4a6  15. b2b4 Carlsen's idea is very interesting. In exchange for the pawn, he left the a6-knight out of play. If White manages to complete his development with Bd3, Bb2, and Re1, his initiative can make a big difference. 15... c6c5 An inaccuracy because now Black loses the chance to play d7-d5, an important move to give his pieces a little more life. Of course, this is easy to say with the computer on, but the position is very difficult to play for a human. 16. b4b5  16... c8b7  17. f1d3  17... a6b8  18. h1e1  18... e8f7  19. e4c3 A deep move, which I really liked. The idea is to prevent Black's development with d6-Nd7. Karpov, the king of prophylaxis, would be proud. 19... f8d6 