Pyramorphinx Page Added

This puzzle from Mefferts doesn’t turn very smoothly, but when I can deal with that, I enjoy playing with it. It is a triangular pyramid—tetrahedron—that can morph into several other shapes. It is also fun to put patterns on it.

I’ve included photos and a video on the Pyramorphinx page.

2×3×3 Rectangular Prism Page Added

The 2×3×3 is interesting because if you hold it so white or yellow is up then the sides can not turn 90˚ like they can with a normal Rubik’s Cube. Only 180˚ turns work.

If you know how to solve the cube corners first, then it is easy to use that method to solve the corners of the 2×3×3, but the edges are probably easier to 3-cycle home than trying to apply the Corners First edge strategy.

There is also a simple corner 3-cycle, so if you want to solve the edges first, then cycle the corners home, that works too. Or if you want to use a block building strategy, that can work. Sometimes with these two strategies, though, you end up with 2 swapped corners. It isn’t as easy to swap two corners as it is two edges, but it can be done using a simple algorithm and 3-cycles.

Understanding the Cube

Some time ago—spring of 2008 I think—I wrote a little booklet about solving the Rubik’s Cube. Never did much with it. It has been living on my Scribd site with my 4x4x4 Story and some other miscellaneous documents I wanted online. Now it is available in my blog menu. WordPress and Scribd seem to play nicely together.

The first part of the book explains a layer by layer method of solving the cube. The second half contains my corners first method. In the first half I include explanations of both a working corner technique, and how to pair up a corner and edge to insert them together.