1. e2e4  1... c7c6 The world champion decided to use the Caro-Kann in the final  phase of the match. 2. d2d4  2... d7d5  3. e4e5 While So put his hopes on the  Advanced variation. 3... c8f5  4. g1f3  4... e7e6  5. f1e2  5... h7h6  6. e1g1  6... g8e7  7. a2a4  7... a7a5  8. b1d2  8... b8d7  9. d2b3  9... f5h7  10. c1d2 Not only developing, but also  keeping an eye on the black a5-pawn. 10... d8b6  11. h2h3 A nasty little  move that underlines the fact that Black lacks productive moves. White's  extra space and strong center provides him an obvious and strong plan of a kingside attack. 11... e7g6 A novelty, which likely won't be repeated soon... 12. d1e1 The black bishop on h5 lost his sharp-shooting eye and no  longer hits on c2. That gives So time to counter-attack on a5 and force a  favorable endgame. 12... f8b4  13. d2b4  13... b6b4  14. e1b4  14... a5b4  15. e2d3 But now b4 is also technically lost. Carlsen  keeps blitzing as if nothing happened, but it is evident that he is in  trouble. 15... c6c5  16. b3c5  16... d7c5  17. d4c5  17... a8a5  18. d3b5  18... e8e7  19. f1e1  19... h8c8  20. c2c3 So comes back to this excellent plan.  Pawns are connected, White is winning. 20... b4c3  21. b2b4  21... a5a8  22. a1c1  22... g6f4 Even in a most desperate situation Carlsen manages to squeeze  resources out of nothing. The sharp activation of his pieces almost saves  the day. 23. c1c3  23... h7e4  24. a4a5  24... f7f6  25. h3h4 