Toho Sort

http://tohosort.host.org/
http://archive.foolz.us/jp/thread/10177079/

>>6
Right. So it's weighting touhous - if you prefer a to b, a's weighting increases, and b's decreases. Repeat many times with many combinations of touhou.

Then it's a sort ([weighting₁, weighting₂, weighting₃).