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5 Sided Cube (aka Ramp Cube)
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A Rubiks Cube with one edge truncated and two adjacent sides "deleted" by gluing extensions on them.

This is a straight forward shape variant. One edge of a Rubiks Cube have to be truncated as it is done on an octagon. The adjacent sides receive some extensions to create this prism with triangular base.
The images of this article do not show the original sample but a remade one of Andreas Nortmann.
Although not spectacular from the perspective of 2012 it has a high sentimental value for the (re-)creator, since it was his first handmade variant of a Rubiks Cube. The original sample appeared around 2000 on Ebay and sold for ca. 300 USD.

This puzzle is part of the series "Octgonal Edges". All modifications of this series are made by truncating an 3x3x3 on its edges. These truncations are symmetric as in the mass produced octagon from which the series takes its name.
The technical signature (Octagonal Edges Extended 3) indicates where to cut the original cube.
Without the keyword "Extended" it is a variant made only by truncating the original cube. With the word "Extended" some sides left over from the original receive additional extensions to "delete" some of these remaining faces.

This variant is shown in old images of Jean-Claude Constantins creation from the 1980s and 1990s. Therefore the year given here is just an upper bound but definitely to high.

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Contributors

Thank you to the following people for their assistance in helping collect the information on this page: Michael Beach (Beatles Cuber).

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