minime12358
Regular
For OLL parity-Looking for a algorithm for OLL parity for the 4x4 that does'nt effect the centers only the edge.
Im also looking for a 2-cycle for centers
I know that one does indeed exist, however I had trouble finding one when I thought I needed one. I am assuming you are trying to figure out parity for edges, and there is actually a nice algorithm: l' U2 l' U2 F2 l' F2 r U2 r' U2 l2
It swaps two edges across from each other on the right. any time you have a connected pair, just use your regular parity alg(Assuming you solve centers first)
If you: Dont solve centers first or Do need a pure oll parity:
do your regular parity alg followed by R U R' U x5. This is a 180 center twist for U, the one that is almost always flipped in a parity alg.
For 2-cycle of Centers
This is actually pretty easy. Its called U2 method, or really its just a 3 cycle between your buffer, an already solved piece of the same color, and the target. It is generally pretty easy if it is on the E layer, but slightly more difficult if it is on D. Im going to post this and then put in the edits how to do each.
Edits:
for centers: for all purposes here, we are swapping Urb with x. All you do is set up your center to Ulf without disturbing the rest of the U face, do a U2, undo the setup, do another U2. This is generally done by doing l/l' or f/f'. For one of your 4 centers on each of the e faces, you need to do U2 setup U2 unsetup. ill just put the setups for each center in the second edit. For D face, I do the "alg" for Dlf, just done with a D/D'/D2 first. Any of the U2 first are marked B
Edit 2:
Actually, I just have time for two faces, F and one center of D. I only did F because the other E faces are similar concepts.
F:
ru: l' u2 l
rd: f' d' f
lu: f u' f
ld: B; r d2 r'
D:
fl: l B d2 B' l'
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