@XanderHenderson I agree that we could do with "Too narrow" as a close reason. We used to have "Too localized" as a network wide closing reason. I'm not aware of exactly what kind of problems it created in SO, but apparently they were judged significant, and it was removed.
I have mixed feelings about it. It would have been (and to an extent was) a wonderful tool for attacking PSQs. On the other hand, I want us to cherish the kind of questions that can only be understood by 3 users, and that might also fall under "too localized".
FWIW, I flagged this question of mine as "too localized" to hear a moderator's opinion. They decided to let it stay.
[ SmokeDetector | MS ] Bad keyword in answer, blacklisted website in answer, pattern-matching website in answer, potentially bad ip for hostname in answer, potentially problematic ns configuration in answer (260): Black and Yellow edges and Shortest path by shirleyovak on math.SE
@amWhy for example if someone asks how to solve an equation, their question should instead be asking how to solve that type of equation. Asking for the means to solve a specific equation is not broad enough. It only serves to help the user.
A lot of answers at the bottom of this are useless. I also think that the question is a poor one, but if it is not going to be closed at least the useless answers should be deleted.