1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. g1f3  3... b7b6 The Queen's Indian Defense, for some reason, lost popularity among the elite. Some people say AlphaZero is guilty of this, but I honestly don't know why. Anyway, this game proves that the rumors about the Queen's Indian's death have been greatly exaggerated. 4. g2g3  4... c8a6  5. d1c2 One of the critical modern lines, and the one where we see some of the famous QID defeats. 5... c7c5 This is the principled move, otherwise 4...Ba6 makes no sense to me. 6. d4d5  6... e6d5  7. c4d5  7... a6b7 The d5-pawn is lost, but White gets dangerous compensation. 8. f1g2  8... f6d5  9. e1g1  9... f8e7  10. f1d1  10... b8c6  11. c2f5  11... d5f6  12. e2e4 A critical position for the theory of this line. 12... g7g6 [%c_effect g6;square;g6;type;GreatFind;persistent;true] 13. f5f4  13... e8g8  14. e4e5  14... f6h5  15. f4c4  15... d8c7 Black has other options, but this is the main move. Ding spent a long time on it. 16. c1h6  16... c6a5  17. c4e2  17... f8e8  18. b1c3  18... a8d8 Both players follow the most critical path. The position is still well-known to opening theory and has been debated in many correspondence games. 19. c3d5  19... b7d5  20. d1d5  20... h5g7  21. a1d1  21... g7e6  22. h2h4 [%c_effect h4;square;h4;type;Inaccuracy;persistent;true] Finally, a new move. The somewhat mysterious 22... a5c6  23. h4h5 [%c_effect h5;square;h5;type;Inaccuracy;persistent;true] 23... d7d6 [%c_effect d6;square;d6;type;GreatFind;persistent;true] Now Black frees his pieces, and the knight lands on d4. Something went wrong with Deac's preparation for this game since he goes on the defensive as soon as the theory is over. 24. e5d6  24... e7d6  25. e2c4  25... c6e7  26. d5d3  26... e7f5  27. h6c1  27... e6d4  28. f3d4  28... f5d4 As a famous chess philosopher once said, The problem with sacrificing a pawn is that you end up a pawn down. Black has good winning chances. 29. a2a4  29... c7d7 [%c_effect d7;square;d7;type;GreatFind;persistent;true] The queen heads to f5. 30. c1e3  30... d6e5  31. h5g6 [%c_effect g6;square;g6;type;Inaccuracy;persistent;true] Opening the h-file makes things even worse, as it's going to be demonstrated by Black. 31... h7g6  32. g1f1  32... g8g7  33. a4a5  33... d7f5  34. e3c1 A sad move to play. 34... e8h8  35. a5b6  35... a7b6  36. f2f4  36... h8h2 [%c_effect h2;square;h2;type;GreatFind;persistent;true] 37. d3d2  37... d8h8  38. c4d5  38... e5f6  39. d5f5  39... d4f5  40. d2d3  40... c5c4  41. d3a3  41... b6b5  42. g3g4  42... h2h1 [%c_effect h1;square;h1;type;GreatFind;persistent;true] 43. g2h1  43... h8h1  44. f1e2  44... f5d4  45. d1d4  45... f6d4  46. a3a1  46... b5b4  47. e2f3  47... h1e1 [%c_effect e1;square;e1;type;GreatFind;persistent;true] Preparing 48...Be3. White is paralyzed.