I’ve come across “diagram” in translations from Chinese weiqi sources, but I’m not sure what is meant by this. Would the usual term in English be something like game record/kifu, opening patterns/fuseki, patterns generally or an idea that’s not got an easy translation?
It’s apparently translated in Chinese-English Dictionary of Weiqi Terms but I don’t have access to that.
Disclaimer, I do not speak Chinese. But, https://yeefan.sg/weiqi/chinesegoterms/ says that the word “diagram” is 图 (圖) (tú) in Chinese, which means picture. I searched for 围棋圖 (Weiqi Tú) and found a variety of board diagrams; not just kifu:
, but also instructional diagrams like this one marking dead stones:
and any other type of game record/instructional image you could think of (Go problems, unusual board states used for instruction, etc).