[Help Thread] Can't solve parity error

[annanee]

So, my friend just bought a 4x4x4 and he can't solve the PLL, 'cause as it looks like, it has an impossible parity error which we can't figure out how to solve.
Any help on this?

 

[JustinTimeCuber]

if you are getting something like that then you are probably using an odd method

 

[Torch]

This isn't parity, it can be solved by two 3-cycles of wings.

Orange top, yellow front:
u' R U' R' u R U R L' U L d2 L' U' L d2 R2

 

[Christopher Mowla]

if you are getting something like that then you are probably using an odd method

Very helpful.

This isn't parity, it can be solved by two 3-cycles of wings.

Orange top, yellow front:
u' R U' R' u R U R L' U L d2 L' U' L d2 R2

Thanks for taking the time to help him.

Just in case you are interested, I found the optimal algorithm for this case: 9 moves:
(2R2 U' F2 U') 2R2 (U F2 U 2R2)

I put this algorithm (and several other pretty brief algorithms) in my 3-look LL Wing Edge Method PDF. (The three steps of the method are: solve one Dedge slot completely, "OLL", PLL.).

In addition, here is an algorithm set for "new" 1 3-cycle and 1 2-cycle cases (cases on the top of page 14 of the PDF) (the "oriented" cases which affect five wing edges) that I didn't include in that PDF (I found the ones in the PDF with Cube Explorer, but I explain in that post that I found nicer for execution and/or shorter algorithms by hand. I should update that document!).