1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. g1f3  3... d7d5  4. b1c3  4... c7c5  5. e2e3  5... b8c6  6. a2a3 This line yielded an important victory for Ding, with White, against Nakamura in the Candidates Tournament. 6... d5c4  7. f1c4  7... a7a6  8. c4a2 A rare retreat. 8... b7b5  9. d1c2 [%c_effect c2;square;c2;type;Interesting;persistent;true] A fresh idea. Firouzja had played this before, but apparently the world champion was not well prepared for it. 9... c5d4  10. e3d4  10... c8b7  11. d4d5 [%c_effect d5;square;d5;type;GreatFind;persistent;true] 11... e6d5  12. c1g5 A new move. 12... f8e7  13. a1d1  13... d5d4 [%c_effect d4;square;d4;type;Inaccuracy;persistent;true] This move leads to a dangerous position. Black wastes precious time and opens the diagonal of the dangerous bishop on a2. The correct way to defend involves the maneuver Na5-c4. 14. e1g1  14... e8g8  15. f1e1 All of White's pieces are playing, and Black needs to find an almost impossible move to minimize the damage. 15... b5b4 I considered putting a dubious sign on this move, but considering the difficulty of the correct one, I thought that would be unfair. 16. a2b1 [%c_effect b1;square;b1;type;Inaccuracy;persistent;true] Once again it is difficult to place a dubious sign, but this time it's necessary. 16... g7g6 The only way to defend. 17. e1e7 [%c_effect e7;square;e7;type;GreatFind;persistent;true] Justifying the previous move. 17... c6e7  18. d1d4  18... d8c7 [%c_effect c7;square;c7;type;Mistake;persistent;true] A blunder that loses the game immediately. The queen doesn't have a good square, but some knight should go to d5. 19. c3e4 [%c_effect e4;square;e4;type;GreatFind;persistent;true] An insta-killer that was missed by Ding. Black loses material. 19... c7c2  20. e4f6  20... g8g7  21. b1c2 The two pieces are much stronger than the rook, especially with such a devastating dark-squared bishop. 21... a8c8  22. f6g4 [%c_effect g4;square;g4;type;GreatFind;persistent;true] 22... e7g8  23. c2b3  23... b4a3  24. b2a3  24... c8c3  25. d4b4 The remainder of the game is easy for Firouzja. 25... b7f3  26. g2f3  26... c3f3  27. g4e3 The rook is trapped. 27... h7h6  28. b3d1  28... f3f2  29. g5h6 [%c_effect h6;square;h6;type;GreatFind;persistent;true] 29... g8h6  30. g1f2  30... f8d8  31. f2e2  31... d8d6  32. d1b3  32... d6f6  33. a3a4  33... f6c6  34. b3c4  34... f7f5  35. b4b7  35... g7f6  36. b7h7 [%c_effect h7;square;h7;type;GreatFind;persistent;true] 36... h6g4  37. e3g4 