I have something similar - there’s an American Math Association, who publish a “math classification paper” every few years. It is a giant list of every single type of math out there at this time. It’s giant. And I just made a program to randomly choose 10, and spit them out. If I know one of them, I give it a check. If not, I invest at least a few hours into learning about it. Hopefully, eventually, I’ll be able to consistently get 10/10. It’s hard though, because they are all over mathematics.
The hardest so far has been Teichmüller theory. Took me 3 days just to figure out what it was about. Take a look at that wiki page - it’s a monster. And then there’s inter-universal teichmüller theory, which I’m not even going to attempt.