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Pyraminx Duo
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<p>The Pyraminx Duo (originally known as <i>Rob's Pyraminx</i>) is a <a href="/facts/Tetrahedron/7mkSrl6j">tetrahedral</a> <a href="/facts/Combination_puzzle/VycHFhMA">twisty puzzle</a> in the style of the <a href="/facts/Rubik%2527s_Cube/Nlq35AbS">Rubik's Cube</a>. It was suggested by Rob Stegmann, invented by <a href="/facts/Oskar_van_Deventer/pMtDlKxI">Oskar van Deventer</a>, and has now been mass-produced by <a href="/facts/Uwe_M%25C3%25A8ffert/1nJjIKsc">Meffert's</a>. </p>