This puzzle was inspired by the many sliding puzzles I have seen on youtube and in my life. I had the idea of using a piston to push a whole row at a time. This made this already hard puzzle even more difficult.
How I Designed This
I used AutoDesk Fusion 360 for this and Cura for slicing.
How This Works
On the sides of the case, there are holes which are sized for the piston and there are four holes on every side. You use the position to push one whole row at a time. On the bottom of every piece, there is a set of groves that match with a set of holes in the case. this helps keep the pieces aligned.
I used 0.2mm layer height with a 0.4mm nozzle. You will need supports on the case and position but other than that you do not need support material. Printed on the Creality Ender 2
Check out the video Here for more info.