[manasecret]

Aha! I unscrambled a scrambled-by-two puzzle. So far the hardest part is figuring out how to move the pieces in the way I want.

I mean, I can see which pieces I need to move and how to move them to solve the puzzle, but figuring out which big cube to click and on which small cube of the big cube, and then which set of the even bigger 4D cube (1, 2, or 3) to get that move is the hardest part.

Don't worry, that last sentence makes no sense to me either.

jeepnut:

It's a different in-out, forward-backward, or something. I don't know, I don't understand that website's explanation well, but it talks about the theory I was referring to.