4x4 parity occurs on the last layer of a 4x4, where you get a case that is impossible to get on a 3x3 so you need a specific algorithm to solve it. OLL parity specifically occurs because two adjacent edge pieces are flipped, but generally you can't recognize it until you are at the OLL stage of solving.
OLL Parity Algorithm 1:
Thisalgorithm is the easiest to execute. It flips the two edge pieces as well as the corners. It also moves other edge pieces in the top layer. If your focus isspeedsolving the 4x4 then this is the recommended algorithm. This should be done before you permutate the corners and edges of the last layer. If you are using CFOP then this is done at the OLL stage, hence the name (OLL Parity).
Rw U2, X, Rw U2, Rw U2 , Rw' U2, Lw U2, Rw' U2, Rw U2, Rw' U2, Rw'
OLL Parity Algorithm 2:
If you have completed your 4x4 solve and you only want to flip the 2 inner edges then you can perform the algorithm below. It is slower to execute, but will not disturb any other pieces.
r', U2, l, F2, l', F2, r2, U2, r, U2, r', U2, F2, r2, F2
DOWNLOAD Print Friendly PDF -Full 4x4 Parity Guide
| Rw | BOTH Right Layers | |
| r | INNER Right Layer | |
| Uw | BOTH Top Layers | |
| u | INNER Top Layer | |
| X | Turn the cube clockwise around the X-Axis | |
| X' | Turn the cube anti-clockwise around the X-axis |
28 comments
Cris
@Joe he does know how to solve a 3×3. There is a parity algorithm to switch the last corners on a 4×4.
Nick
Nice if you forget the parity algorithm every now and then.
Cragmato
@James Havana that’s true.
Jim
@Joe I’m pretty sure Jacob is asking about PLL parity. Please go learn 4×4 before giving arrogant advice.
Isaac
2nd one helped me with 11×11
Henry
This is great! I’ll have a hard time memorializing it though.
Miles
I loved this for memorizing 4×4 layer by layer
Cc
From this and the pll parity from this web I learned to solve a 4×4 reduction method
timmy
amazing
Tathya
1st 1 works but second doest
AHSAN
thanks !! helped a lot
KD
thank you
J
Helped me solve 4×4!!!
zac
this is amazing! it actually works.
zac
this is amazing! it actually works.
Joe
@jacob If you’re asking how to solve the last corners, than you obviously don’t know how to solve a 3×3. Please go learn 3×3.
Karri
Super helpful ! Thanks!
Amrit
This actually helped me
Quin
This actually works!?!!!?!?!??!
badger
this format really helps
jacob
what algorithm do I use to switch the top corners
Viggo
Thanks for the official algorithms
Viggo
Thanks for the official algorithms
Bob
This really does work
Quintin
cool
CM
Very helpful. Thank you so much! Helped me learn 4×4
Akarsh
Last two corners
James Havana
This oll parity algorithm is the most hardest algorithm to memorize
