Black's best chance apparently is the rook endgame.
1. g1f3  1... c7c5  2. c2c4  2... b8c6  3. b1c3  3... e7e5  4. e2e3  4... g8f6  5. a2a3  5... f8e7 One of the ways to react to White's reversed Kan Sicilian. 6. d2d4  6... e5d4  7. e3d4  7... c5d4  8. f3d4  8... d7d5 A risky line. White is getting a very favorable endgame, almost by force. 9. c4d5  9... f6d5  10. d4c6  10... b7c6  11. c3d5  11... d8d5  12. d1d5  12... c6d5  13. c1e3  13... e8g8  14. e3d4 A novelty, which does not change the character of the endgame. It is clearly favorable for Nepomniachtchi, no matter the time control. 14... f8e8  15. e1c1  15... c8f5  16. f1d3  16... a8c8  17. c1b1  17... f5d3  18. d1d3 