The author loves Weiqi very much. Several world-famous Weiqi masters, Chen Zuping and Nie Weiping, were his Weiqi teachers, so he became a master himself. He also likes to bring this kind of scene into his works. You can see wonderful Go stories in the legendary swordsman and Autumn Records of Jian 'an in Shu.
Zhenlong is a term of Weiqi. It refers to the wonderful setting of Weiqi as a whole, with emphasis on strangeness and ingenuity: grabbing in the middle, sharing life, gathering gas, attacking against life and so on. And the pattern is huge and complicated. So does the Jane Dragon written in the book exist? The Chinese Chess Academy also made a statement that the position of idiot Xu Zhu playing chess is a restricted area. According to the current rules (rules of Go in China, Japan and Korea), it is not allowed to fill in the forbidden points. If you must go, you must pick it up at once, stop playing chess and punish you once, because this is an unreasonable chess path. Although there were no formal rules in ancient Weiqi, everyone had a certain agreement on the way to play chess, and they could not play at the forbidden point, so I guess this scene was invented by Mr. Jin Yong. It is said that he consulted Master Nie when writing, and the master replied, in fact, there is no such chess game at all. Moreover, the really rare chess games recorded in history are very rough and have little reference significance, so I won't say it here.
According to these inferences, we can naturally think that what is written in the book is the author's unique ideas. I wonder if this answer will help you?