1. g1f3  1... d7d5  2. e2e3  2... c7c5  3. b2b3 Ju hadn't managed to pose opening problems with her traditional repertoire up to this point in the match, so she starts experimenting with new lines. In round seven, she tried the Caro-Kann and in this round, instead of going for the main lines of the Queen's Pawn, she decides to aim for a slower setup. 3... b8c6  4. c1b2  4... a7a6  5. g2g3 It's a bit strange to play e3 and g3 in the opening, as the main idea of both moves is to free the path of the bishop. We need to understand that White is not interested in achieving an advantage right after the opening in this game. She is aiming at a long positional struggle without forcing variations. 5... d8c7 This move looks a bit superficial. 6. d2d4 I found no games in my database with this position. This is certainly not a common situation after move six of a world championship match. 6... c5d4  7. e3d4  7... c8g4  8. f1g2  8... e7e6  9. e1g1  9... g8f6  10. b1d2  10... f8d6 The bishop seems more comfortable on e7, without having to worry about the advance of c4-c5. 11. c2c4  11... e8g8  12. a2a3  12... a6a5 Avoiding White's plan with c4-c5 followed by b3-b4. 13. h2h3  13... g4h5  14. d1e2  14... f8d8  15. a1c1  15... d5c4 One of the most difficult strategic decisions in chess is when to release the central tension. 16. b3c4  16... d6e7  17. e2e3  17... a8c8  18. f1e1  18... h5g6 It's time for White to decide on a plan of action. This is usually what happens after all the pieces are developed. 19. e3b3 The queen is well placed on this square. The pawn on a5 is not something that Black wants. 19... c7b8  20. c4c5 [%c_effect c5;square;c5;type;GreatFind;persistent;true] A good moment to advance the pawn. The knight is going to c4. Black must react quickly. 20... f6d5  21. d2c4  21... a5a4 [%c_effect a4;square;a4;type;GreatFind;persistent;true] An excellent move. Black cannot stand still, for example: 22. b3a4  22... b7b5 [%c_effect b5;square;b5;type;GreatFind;persistent;true] This is Lei's idea. 23. c5b6  23... d5b6  24. c4b6  24... b8b6 At the cost of a pawn, Black's pieces are finally free. This is textbook defensive technique. 25. b2a1  25... b6a5 Forcing the queen exchange and leading the game to a drawish endgame. 26. a4a5  26... c6a5  27. c1c8  27... d8c8  28. d4d5 The only winning chance. 28... a5b3 [%c_effect b3;square;b3;type;Inaccuracy;persistent;true] 28...Bxa3 is much simpler. 29. d5e6  29... f7e6 [%c_effect e6;square;e6;type;Inaccuracy;persistent;true] 30. a1e5 [%c_effect e5;square;e5;type;GreatFind;persistent;true] An accurate reply. 30... e7a3 [%c_effect a3;square;a3;type;Mistake;persistent;true] 31. e1e3 [%c_effect e3;square;e3;type;GreatFind;persistent;true] 31... g6c2  32. f3d4 [%c_effect d4;square;d4;type;Mistake;persistent;true] 32... b3d4  33. e3a3  33... d4c6 This loses a pawn, although the remaining position is drawn with accurate play. 34. g2c6  34... c8c6  35. a3a8  35... g8f7  36. a8a7  36... f7e8  37. a7g7 The endgame is objectively drawn, although Black needs to be able to defend with precise moves for a long time. The added pressure on the clock and on the match will show on the next moves. Ju will quickly gain a decisive advantage. 37... e8f8 [%c_effect f8;square;f8;type;Inaccuracy;persistent;true] 38. g3g4  38... c6c5  39. e5f6  39... c2e4 [%c_effect e4;square;e4;type;Inaccuracy;persistent;true] 40. g1h2  40... c5b5  41. g7e7 Black is in a difficult situation now. The path to the draw has become much narrower. 41... b5b6 [%c_effect b6;square;b6;type;Inaccuracy;persistent;true] 42. h3h4  42... b6b3 [%c_effect b3;square;b3;type;Mistake;persistent;true] 43. e7e6  43... e4f3  44. g4g5 With two pawns up, the endgame should be winning. To demonstrate this, however, is not a trivial task; opposite-colored bishops always offer drawing chances. 44... f3g4  45. e6e7  45... g4f5  46. h2g2  46... f5h3  47. g2g1  47... h3f5  48. h4h5  48... b3h3  49. h5h6  49... h3d3  50. g1h2  50... d3h3  51. h2g2  51... h3d3  52. f2f3  52... d3d7  53. e7e5  53... f5c2  54. f3f4 Ju is playing very well. She advances all her pawns and now must find a way to break Black's light-square resistance. Without rooks, the endgame is completely drawn, but as it is, White has the chance to give up the rook for the bishop and try to advance the pawns. 54... d7d5  55. e5e7  55... c2f5  56. g2f2 [%c_effect f2;square;f2;type;Mistake;persistent;true] This allows a surprising tactical resource that saves the game. 56... d5d2  57. f2e3  57... d2d6 [%c_effect d6;square;d6;type;Mistake;persistent;true] 58. e7c7  58... d6d3  59. e3e2  59... d3d5  60. f6c3  60... f8e8  61. e2f2 