Back in the day we did it, I think, somewhere. Can’t find it though. You’re given common joseki in one color and you need to recognize it. Sort of training your pattern recognition in a peculiar way.
Two Japanese pros did a competitive round of it:
To not waste your time, here’re the positions given. I still recommend watching the video for fun. Watching these Japanese videos is similar to being a dog. You don’t understand what they’re saying, but if they’re cheering, you’re happy too. But I imagine not everyone shares this type of fun with me, so here’re the positions:
Did you get them all? Of course, these are relatively simple, and most players can figure them out given some time and thought. Seriously though, how many dans do you need to be to get all of them?