Fold the shape into a rectangle such that the rectangle is 2 layers thick everywhere. The grey part is not included in the puzzle; the purple part is the puzzle.

enter image description here

Although solutions are not required to be applicable in real life, using an actual sheet of paper is a great visualization tool.

A puzzle for this type of orgami puzzle game made by Ωmega_3301, similar to this question.

This is intended to be a very hard and uncheeseable puzzle. I will bounty 100 for the quickest solve and an additional 100 for each essentially different cheese, stackable. Bounties will expire at April 4th 2024 so I can have a life.

  • $\begingroup$ Am I missing something or is there an easy solution where you fold the purple semicircle down, then fold the left column over the center column, then fold the right column in half? $\endgroup$
    – xnor
    Mar 31 at 8:30
  • 2
    $\begingroup$ @xnor As bolded, the resulting shape must be a rectangle. $\endgroup$
    – Sunny Lu
    Mar 31 at 8:31

1 Answer 1


Here we go... Sorry, it is not the "orthogonal" type.

enter image description here

Here is a cleaner image. Fold on the red lines. It might not be obvious at first, but everything falls in place.

enter image description here

  • 2
    $\begingroup$ Correct and intended, will bounty when eligible. $\endgroup$
    – Sunny Lu
    Mar 31 at 23:44
  • 2
    $\begingroup$ What!!! Insane I mean I have no experience whatsoever with these kinds of puzzles so I might be wrong but this looks like a crazy solution! $\endgroup$
    – PDT
    Apr 1 at 2:23
  • 4
    $\begingroup$ I don't think I need the bounty. You could save it for someone else. $\endgroup$
    – Florian F
    Apr 1 at 7:30

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