In the few minutes between the games Carlsen figured out a  good plan to fight the opponent's plan!
1. e2e4  1... c7c5  2. g1f3  2... b8c6  3. f1b5  3... e7e6  4. b5c6  4... b7c6  5. d2d3  5... d8c7  6. e1g1  6... g8e7  7. h2h4 A novelty, as early as move seven! Caruana created a whole new system to  fight Carlsen's beloved Anti-Rossolimo line and was hugely successful in  the match so far. 7... e6e5  8. h4h5 