Yeah, I first heard about them while reading writeups from http://save-endo.cs.uu.nl/ http://save-endo.cs.uu.nl/ and spent quite a while trying to figure out ho

Yeah, I first heard about them while reading writeups from http://save-endo.cs.uu.nl/ http://save-endo.cs.uu.nl/ and spent quite a while trying to figure out how so many of the contestants knew about them and how I would have found them by Googling (never was successful). I think it would have been easier to find them now in 2016… I've seen lots of implementations floating around :-)