For example, Algebraic Number Theory Small House.
The founder of this forum, back in the day, probably named it something so niche and awkward to make full use of the openness of the internet, saving a lot of hassle, and not be disturbed by too many bored people.
But when Qiao Yu mentions it, there's always some bored people who want to challenge their own weaknesses.
It worked well, the small forum with only a few hundred people online at its peak suddenly experienced a traffic surge. The first ones could take a look at the post titles, even click the register button, and then get shocked by the dense multiple-choice questions.
And then the whole forum crashed...
But it doesn't matter, the multiple-choice quiz required to register was also posted by netizens.
The good news is that all the questions are single-choice, the bad news is that the forum's question setters ruined the single-choice questions.
