Once again, strictly an only move. The black king should be slowed down.
1. c2c4  1... c7c6  2. g1f3  2... d7d5  3. d2d4  3... g8f6  4. b1c3  4... d5c4  5. a2a4  5... c8f5  6. f3e5  6... b8d7  7. e5c4  7... d8c7  8. g2g3  8... e7e5 According to Megabase, the first time this complex Slav line occurred was back in 1929 (see below.) 9. d4e5  9... d7e5  10. c1f4  10... f6d7  11. f1g2  11... g7g5 11...g5 is better than 11...f6, claims the base. 12. c4e3  12... g5f4  13. e3f5  13... e8c8  14. d1c2  14... c8b8  15. g3f4  15... e5c4  16. e2e3  16... d7c5 All of this was practically blitzed by Firouzja, whereas Aronian was taking some time on the clock. 17. a1d1 \"I remember I analyzed this line with GM Andriasian in 2004, and I remember that it was playable but passive.\" (Aronian) 17... d8d1  18. c3d1  18... c7a5  19. e1e2 \"I kind of forgot that I was analyzing it and thought that this is playable.\" (Aronian) 19... a5a6 Strong $1 20. e2f3  20... a6a4 Just winning a pawn. 21. c2a4 And here Aronian seemed to set a new record of thinking for more than an hour for a move. I doubt this record will be beaten, at least at this tournament. 21... c5a4  22. f3e2  22... c4b2  23. d1b2  23... a4b2 Black is winning, but Firouzja still needs to prove the win. 24. h1b1  24... b2a4 The fork threat leaves White no time to snatch the pawn back. 25. e2d2  25... a4b6 Overly solid. 26. g2f3  26... f8c5  27. f5h6 The only way to play on is to keep Black busy before he pushes his pawns too far. 27... f7f6  28. b1g1  28... a7a5  29. g1g8 At least some opposite-colored bishops get a chance. 29... h8g8  30. h6g8  30... f6f5  31. d2c2  31... a5a4  32. g8h6  32... b6c4  33. f3e2  33... c4d6  34. e2d3  34... d6e4 Firouzja played this without much hesitation. He is convincing that fast. 35. d3e4  35... f5e4  36. h6g8  36... b7b5  37. g8f6  37... b8c7  38. f6h7 \"Just a practical chance.\" (Aronian) 38... b5b4  39. h7g5  39... b4b3 A good signal for White $1 40. c2b2  40... c5b4  41. g5e4 The knight is almost there and... 41... c6c5 Suddenly leads to a draw by force $1 42. e4c3 The pawn is en prise; therefore, Firouzja needs to enter a pawn endgame. 42... b4c3  43. b2c3  43... c5c4 Aronian speculated that Firouzja believed that the arising queen endgame would be won by him, but he missed a detail (see below). 44. c3b2 The only move. 44... c7d6 