Andreas Nortmann wrote:
Is this the first "Moving Hole"-puzzle where the pieces have a visible orientation?
The only other puzzle I could find is "Alex Black Hole"
Well, there is Alex & Oskar's Polo Cube, and Bram's Black Hole.
as well as my Cubedron, Octedron, Krystalledron etc,
And I am sure we can find many more if we search!