From keith@nwwtdi.demon.co.uk Fri May 3 05:57:07 1996 Return-Path: Received: from relay-4.mail.demon.net by life.ai.mit.edu (4.1/AI-4.10) for /com/archive/cube-lovers id AA23140; Fri, 3 May 96 05:57:07 EDT Received: from post.demon.co.uk ([158.152.1.72]) by relay-4.mail.demon.net id aa02376; 3 May 96 9:56 GMT Received: from nwwtdi.demon.co.uk ([158.152.54.227]) by relay-3.mail.demon.net id aa27731; 3 May 96 10:56 +0100 Message-Id: Date: Fri, 3 May 1996 10:46:18 +0100 To: Cube-Lovers@ai.mit.edu From: Keith Gregory Subject: Octahedra and tetrahedra Mime-Version: 1.0 X-Mailer: Turnpike Version 1.11 I have recently been solving a simulation of an octahedral rubiks cube type puzzle (an octahedron which twists through planes parallel to the faces). Does anyone know if mechanical versions of such a puzzle exist? The Skewb is clearly an example of an octahedral puzzle mapped onto a cube so mechanically it must be possible to manufacture one with 2 triangles on each edge. However I would really like one with 3 or 4 on each edge. My investigations suggest that, like the cube, if you can solve a one with 4 on each edge you must have the right techniques for solving on with 5,6,7,8,9 or 10 along each edge (if you have the patience). Is there anyone else interested in octahedral puzzles? Similarly does anyone know if there is a mechanical version of a tetrahedral puzzle with 4 triangles on each edge rather than the standard 3? Thanks -- Keith Gregory