|If you haven't already read the notation section of the 3x3x3 guide you should review it before beginning
this section. The notations will be quite similar but there are some differences. We use the same references for the Up, Down, Front, Back, Left and Right sides as with the 3x3x3.
We need a way to refer to the inner slices though. The way we do that is assign a letter to the slice which is the same as the closest side,
but in lowercase. See the figure below for reference. The horizontal slices are assigned u and d and the vertical slices are l and r.
This is the same as the notation I used for the 4x4x4 cube. |
Below is a link to an applet which I got from www.bigcubes.com that you can use to show how to move a single slice. That website is great and has a wonderful section of algorithms for solving parity problems. Since their site leans more toward speedsolving they have several algorithms I won't duplicate here which you may find useful.
Click Notation for Professor Cube if you want to review all the moves. Otherwise you can continue on to Solving the Centers.