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Marcos Pyramid
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A Square-1 in midturn and afterwards reshaped into a tetrahedron.

A Square-1 was transformed in this case. An incomplete 90°-turn is applied. Afterwards the puzzle is transformed into a tetrahedral shape. This concept was made before by Anthony Greenhill under the name "GREENHILL'S TETRAHEDRON". It even was the inspiration for this variant.

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Contributors

Thank you to the following people for their assistance in helping collect the information on this page: Andreas Nortmann, Lawrence Cuthbert.

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