I mean is there a practical use for it? It seems to me that it takes up a lot of valuable space on the page which could be used for something more important.
I’ve been thinking of a suggestion, for development would it be possible to make the Play page the homepage, remove this non-useful square (above) and replace it with the user’s game challenges and the notifications that OGS provides about streams, and tournaments, etc. that appear on the homepage? I feel combining these two pages would be a much better use of space and would reduce the amount of redundancy and increase the efficiency of pages.
I agree that the graph is pretty useless since it basically duplicates the list of challenges. Also it somewhat ruins the “hide ranks” feature.
However, maybe it’d be important to be able to sort challenges, for example by likely game time or opponent strength or board size, which I guess is what the graph does.
Maybe default to the play page of you have no games in progress? I think one issue is that when you first start on OGS you are greeted with a blank page that helpfully inform you that you are not playing any games. The only reason I can think not to start on the play page in that case is that it makes no sense to a beginner!
But on mobile then you could also just use the profile page? Just the ranking stuff to scroll past (maybe that could all be shifted to under games if you select “hide ranks”) plus it has game history info right there too. What does home page add? Only notifications?