Carlsen needs to generate threats at once  because if Nepomniachtchi consolidates, he will have all the long-term  advantages.
1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1b5  3... a7a6  4. b5a4  4... g8f6  5. e1g1  5... f8e7  6. d2d3 A modest, solid line. White often plays like this when he wants to avoid the Marshall  Gambit. 6... d7d6  7. c2c3  7... e8g8  8. b1d2  8... f8e8 A standard regrouping that aims  at the center. 9. f1e1  9... e7f8  10. d3d4 White gains control of the center, but  this comes with a price. 10... b7b5  11. a4c2  11... e5d4  12. c3d4  12... c8g4  13. d2f1 Nepomniachtchi is OK with the doubled pawns. 13... g7g6  14. f1g3  14... f8g7  15. c1e3  15... f6d7 Played after some thought. 16. a1c1 A logical novelty. 16... g4f3  17. g2f3 