[gleitz]

I'll be writing a series of blog posts about the architecture of the game as well as more info about the API at http://blog.wikimaze.me/

At a high level you are mostly right. The incorrect answers are generated using http://www.freebase.com/ (now a Google product)

Lots of pages have to be thrown out, but after analyzing thousands of articles it was relatively straightforward to know when you had a good page versus a bad one.