I posted this here after seeing essentially the same thing on lichess.org. Didn't post the link to that because it requires you to have an account in order to s

I posted this here after seeing essentially the same thing on lichess.org. Didn't post the link to that because it requires you to have an account in order to see it. Of course, this is only "security"-by-obscurity. Not only could computers solve these problems, but certainly they can do so better than us. So not very generalizable, but probably works well for a niche site. Still, I thought it was clever.