Of the many things I have read today and clicked on, this is the only thing I found that stuck in my head enough to write about.
Yes, it appears that there are one billion mazes on this site, available for free in pdf format. I didn’t count them, I’m just going on faith. It also appears that they are of increasing difficulty, but again my highly scientific testing included exactly three (3) test cases: puzzle number 1, puzzle number 571 million-something, and puzzle number almost 1 billion. They seem to get harder, although the second link seems way way harder than the almost 1 billionth puzzle, maybe they need some help rating them?
Anyway, you are welcome. For the maze fan this is fairly important find, I would imagine. Let me know when you have finished them all.
You have me and of course the original poster on Metafilter to thank.