1. e2e4  1... c7c5  2. g1f3  2... e7e6  3. d2d4  3... c5d4  4. f3d4  4... b8c6  5. b1c3  5... a7a6 The first surprising move. Rapport has always preferred Qc7 here in the past, which is far and away the main move in modern times. 6. g2g4 Bold, but probably not best. Caruana's time management suggested that he hadn't checked 5...a6 much. 6... g8e7  7. c1e3  7... b7b5  8. d4b3  8... c6a5 Rapport was still playing pretty fast at this point, but we are already well outside of normal theory. This position had only been seen once before, in an Ulf Andersson game from 2000. 9. d1d2  9... a5b3 This feels unnecessary to me. The knight on b3 was not going anywhere, so did we need to take it right away $2 It means White no longer has to ever worry about Nc4 and can put the bishop on g2 more comfortably. 10. a2b3  10... c8b7  11. f1g2  11... e7g6  12. h1f1 This weird-looking move has clear merit. The bishop can hide on h1 after Nh4, White is ready for f4-f5 later, and he can still castle long. 12... b7c6  13. g4g5  13... a6a5 It turns out White's king will have nowhere safe to hide. Already Black is a bit better. 14. f2f4  14... a5a4  15. a1d1  15... f8b4 Not a bad move by any stretch. The machine gives Black a slight edge after a lot of continuations, but one in particular stands out most to me. 16. d2d4  16... d8a5 This forces a draw. 17. d4g7 