1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1b5  3... f7f5 Carlsen is never shy to try something  different. He had only played this move twice before in his career, in  2008 and 2014. 4. d2d3 A modest, but unplesant move against the Schlieman. White does not intend to refute the opening but wants to exploit the  weakening of the a2-g8 diagonal in the future. 4... f5e4  5. d3e4  5... g8f6  6. e1g1  6... d7d6  7. b5c4  7... c8g4  8. h2h3  8... g4h5  9. b1c3  9... d8d7  10. c1e3  10... f8e7  11. a2a4  11... h8f8 A novelty, which will hardly attract  followers. 12. c4e2 This practically refutes the novelty. Black's main problem is  that he cannot castle naturally. His bishop on h5 also starts to hang. 12... h5f3 The world champion solved the problem of the bishop but this weakened the whole light-square complex. 13. e2f3  13... e8f7 At least Black can castle by hand. 14. c3d5  14... f7g8  15. a4a5 Caruana has a clear edge and the obvious plan of improvement on  the queenside. 15... a7a6  16. c2c3  16... g8h8  17. d1b3  17... c6d8  18. a1d1  18... f6d5  19. f3g4  19... d7b5  20. b3d5 Here Caruana needs to sacrifice a pawn, but as the  black queen is in a dangerous spot he preserves large advantage. 20... b5b2  21. d5c4  21... c7c6  22. d1b1  22... b2a3  23. e3b6  23... d8f7  24. b1a1  24... a3b2  25. f1b1  25... d6d5 Under pressure, the world champion blunders. 26. c4d3  26... d5e4  27. d3d7 That is it! White wins a piece. 27... b2c3  28. d7e7 