Archive for February, 2010

I recently made myself a Rubenking cube with stickers from CubeSmith and after solving most of the cube I got stuck with centers that were not aligned properly. Below are the algorithms I found for aligning the centers and completing my solution.

Note that these algorithms will work for picture cubes.

• Case 1: Two centers with 90 degree rotations, hold on the piece that requires a clockwise rotation on the left and the piece that requires a counter-clockwise rotation on the up face and perform the following algorithm:

  MR’ MU’ MR U MR’ MU MR U’

• Case 2: One center requires 180 degree rotation, hold on top face and perform the following algorithm:

  (U R L U2 R’ L’)2

When trying to work on an OLL or PLL algorithm it is often useful to have the inverse of the algorithm so that you can easily setup the situation you want to try. Use the algorithm inverter below to obtain an inverted algorithm.

This inverter uses Superset notation which you can find defined in detail here!

There is support for the following symbols: R U F L D B TR TU TF TL TD TB CR CU CF CL CD CB MR MU MF ML MD MB

There IS suppport for inverting any of the symbols above one at a time.
Valid inversion R' U' F'
Invalid inversion (R U F)'

ALL moves must be seperated by a space. Valid inputR' U' F' Invalid input R'U'F'

This inverter is very basic there is no support for inversion of groups (i.e., (F R U)'), commutators (i.e., [a,b]), repitition, or any other advanced Superset constructs.