## Sunday, February 16, 2014

### Meier-Halpern Pyramid (Jing's Pyraminx)

In the previous post I showed a solve of the Skewb Cube. The Meier-Halpern Pyramid corners can be solved like the first 4 corners in the Skewb video, with just a few simple twists. If the centers are not solved they can be solved with one EPS. Or, if preferred, the centers can be solved later using a Triple-EPS.

Now the edges may be solved with the same algorithm as the Skewb center squares, but there are easier ways. For example, the EPS can be used to place them if centers are going to be solved last, or the Double-EPS can be used to place them if the centers are already solved. So it just depends on whether you like having the centers and corners all solved first, or not. Why can this simpler method be used here, but not with the Skewb Cube? Because it twists the centers of the Tetrahedron, which doesn't matter, unless orientation of the centers matters to you. It doesn't to me. I ignore the grain of the stickers. If it matters, the longer algorithm demonstrated in the Skewb Cube video works.

Finally, if a pair of edges need flipped, without disturbing the rest of the puzzle ,,,