Yup. I was riffling them and the squares moved. I don't know if this has been posted before. I thought I'd share.
theory11 — Magic Tricks & the World's Finest Playing Cards
This is the mentioned thread.While it has been posted before, nice job on your part for finding the very subtle one-ways. There are a myriad of possibilities for effects with the one-ways.
Cheers,
JTM
Actually, I was referring to the "Guardians Have One-Way Backs" thread, the "One way back design" thread, and the "One way backed Guardians" thread.This is the mentioned thread.
http://forums.theory11.com/showthread.php?t=966&highlight=guardian+back