# [Help Thread]4x4 Discussion and Help

#### Kiwi-Bird

##### Member
I have this on my 4×4 Rubik's cube and I'm not sure what to do. Does anyone know what to do?
I also didn't mess where the pieces were.

#### abunickabhi

##### Member
Look up k4 method. You can solve the last layer using the k4 method, doing dedge permutation and corner permutation, U2 F E' F' M F' M' F2 E F' U2 .

#### PetrusQuber

##### Member
I have this on my 4×4 Rubik's cube and I'm not sure what to do. Does anyone know what to do?
I also didn't mess where the pieces were.
View attachment 14067
The standard reduction 4x4 beginner’s method says as the second step, to pair up all the edges then. You didn’t pair all of them up, hence why a couple are unconnected

#### Kiwi-Bird

##### Member
The standard reduction 4x4 beginner’s method says as the second step, to pair up all the edges then. You didn’t pair all of them up, hence why a couple are unconnected
Thankyou. I must have accidentally missed that.

#### Haliax

##### Member

Is this cube unsoleable or am i just ?

#### Haliax

##### Member
What does mw2 Uw2 stand for?

#### One Wheel

##### Member
What does mw2 Uw2 stand for?
Mw2 = turn the middle two layers (that turn around the right-to-left axis) 180 degrees

Uw2 = turn the top two layers 180 degrees

Sorry, I should have been more clear.

#### Haliax

##### Member
I tried it but got the same result. Is it possible in the 4x4 for one corner piece side to correspond to the right colour but the others dont? Because in the 3x3 this is impossible. Either all three sides are wrong or all are correct. In 3x3 on side right and other two swaped isnt possible for corner pieces.

#### Tabe

##### Member
I tried it but got the same result. Is it possible in the 4x4 for one corner piece side to correspond to the right colour but the others dont? Because in the 3x3 this is impossible. Either all three sides are wrong or all are correct. In 3x3 on side right and other two swaped isnt possible for corner pieces.
No, that's not possible. You've got the centers in the wrong spots. You need to swap red and orange.

#### Haliax

##### Member
Haha okayi got it thx!

#### Haliax

##### Member

After getting the edged paired i solved it like a 3x3. But i’ve never encountered this. Red and blue are complete tho. Any formula for only swapping these neighbouring edges?

#### One Wheel

##### Member
View attachment 15325
After getting the edged paired i solved it like a 3x3. But i’ve never encountered this. Red and blue are complete tho. Any formula for only swapping these neighbouring edges?
You have PLL parity. Opposite PLL parity is solved by r2 U2 r2 Uw2 r2 Uw2, where r is the second layer from the right, U is just the top (Up) layer, and Uw is the top 2 layers. For adjacent parity you can either do opposite parity and then a U perm, or set up the two adjacent edges so they're opposite, and the resulting algorithm is R U R' U' r2 U2 r2 Uw2 r2 Uw2 U' R U' R'.

Explain

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#### cuberbutnotacuber

##### Member
But I finished it all

#### One Wheel

##### Member
But I finished it all
No, you didn't. The yellow- orange and yellow- green edges aren't paired. Fix those, then parity, and you'll be able to solve it.

Oh ok thank you!

#### DNF_Cuber

##### Member
Oh ok thank you!
If you're having trouble with L2E, then just do Uw or Uw' then R U R' F R' F' R and reverse you're Uw* move