Step 1
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Formation of the tetrahedron When the tetrahedron is formed, your Pyramorphix will look like this:
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Trivial case When you have the following shape, simply make a quarter turn of the lower edge
In all the following cases, the objective is to obtain this shape and then perform this quarter turn.
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Case 1
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Case 2
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Case 3
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Case 4
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Case 5
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Other cases I think I have identified all the possible cases but it is possible that there are others.
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