# Rubiks Revenge - Pairing Up The Edges

Continuing with the reduction method in order to solve the **4x4x4 Rubiks Revenge Cube**, after solving the 6 Centres the next step is to Pair up the Edges.

The goal of the second step is to pair up the Double Edge (Dedges).

*Double Edges* stand for pairs of edge cubies that make up a logical edge cubie of a Standard Cube.

There are 12 Dedges, each with two cubies of the same combination, so we have 24 edge cubies in total.

There are several ways to pair up the edges to form Dedges, here the simplest one will be explained in detail.

When you have solved the Centres and paired up the Edges, you can finish off the cube in the same way as a 3x3x3 Standard Cube.

## Step 2, Pairing Up The Edges

Look for two Edge Pieces and locate one piece in the Front Face and another in the Back Face (Case A) or one piece in the Right Face and another in the Left Face (Case B) .

Make sure when doing this move that you have an unsolved edge group in the position shown as light gray.

.

## Warning:

### If you havenâ€™t read the first part, please read it before continuing. Be careful that you need to have clear the difference between (for example) a movement **(R)** and a movement **(r)** in the context of **this tutorial**.

### The r,l,u,d,f,b movements rotates two layers (the internal and the external) and the R,L,U,D,F,B movements rotates one layer (the external).

### The r,l,u,d,f,b movements are shown with a double-arrow. Be careful or you will end up messing the cube.

### If you don't know the difference, see Turn Of An Internal Face.

## Pairing, Case A

## Pairing, Case B

To position two Edge Pieces in order to solve a Dedge, you will move only the Upper, Left, Right, Down Faces. If you need help, see examples here.

To solve the last two Dedge Pieces, locate them in the Front Face, with both pairs of Edge Pieces same color in same face. If the pieces are like it is shown, make these moves (the colors are only for reference):

When you have same color in same face, make these moves:

If you still have difficulties, in the following video you will see the movements explained before.

**Note**: In the event that you do not see the video, please **click here**.

## Step 3, Finishing the Cube

Once you have finished the 3x3x3 reduction method you will be able to solve your cube as if it were a Standard Rubik's Cube, except for a few situations known as parity errors.

## Last Layer Edges Parity Error

In step **Last Layer Edges**, you will have a parity error if you have an incomplete line or an incomplete cross:

## Incomplete Line

## Incomplete Cross

## Top Layer Edges Parity Error

In step **Permute the Top Layer Edges**, you will have a parity error if you have only two Degde to permute.

(The Corner Piece shown in the images it's a reference for the color of each face).

## Opposite Dedges

If the Dedges are adjacent, you will swap two Opposite Dedges in order to get three incorrect Dedges to permute.

## Adjacent Dedges

Once you have three incorrect Dedges, you can permute them Clockwise or Counter-Clockwise as in the 3x3x3 Rubiks Cube.

## Top Layer Corners Parity Error

In step **Permute the Top Layer Corners**, you will have a parity error if you have only two Corners to permute.

## Corners In Line

## Corners In Diagonal

Now you know *How To Solve A 4x4x4 Rubiks Cube*.

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## Comments 52 comments

I hav a parity error that is neither of the ones mentioned here.

I only have one corner that is not fully solved. I know how to solve a 3x3x3 cube and try to use the last step in solving that cube when I am trying to solve the 4x4x4.

Everything I have tried doesn't work. I have even tried getting the parity errors mentioned above, but I still cannot solve it.

Any suggetions?

ps--no one has ever removed the pieces so I know that is not the problem.

It is very good, the details are said clearly.

I've tried solving the cross numerous times and I just can't get it. I can understand the algorithms for the other steps, that one I just can't get to work.

Haha...I'm glad that was the reason...I was thinking that I was seriously messed up. I'll give that a go!

is the cross corrected ? If it is where is it?

i cant finish the incomplete cross?

As long as the cube is positioned the same as pictured, the steps do work.

Hi, I had some difficulties to pair up the edges by using your algoritms. I belive they are wrong when you are supposed to twist the U-layer. The move (in both algoritms) should be in the opposite direction. I did it that whay and it worked then, plz take a look at it. Have a nice cubeing time :D

How do I do the incomplete cross??

I already tried it 3 times and it always messes up my cube!

I think there's a problem.

PLZ and please, StefanMPD, look it up.

By, Someone765!

Yes my cross is exactly the same

Yes, I understand r and the R movement.

I saw your video on youtube, and it works, I can't figure out the problem!!

:):):):):):):):):):):):):):)

Well i don't know eiter, but still thanks for looking it up

Sorry for all the trouble I caused.

Just wanted to say thanks - great post and excellent pictures.

Thanks again.

Hey, I finally got it!!!

tnx for your help and all...

i really hope I wasn't too much trouble...

Well, goodbye, this is proboably the last time I'm writing to you...!

THANKS AGAIN!!!!!!!!!!!!!!!!!!

I've found these extremely helpful, except I don't think that the corner parity error solves are misprinted. I know all the notations, but I still cannot get them to work. I am 99% sure I am doing it correctly too.

Hmmm... there is something wrong with the entire parity section...

correction, I do think they are misprinted, sorry.

Hi!

Great tutorial! But I'm afraid i went mad with with the parity error with the corners...

I did it around 10 times but after the steps the whole cube is somehow twisted.

Can you image what misstake I do?

finally I got it..thanks 8-)

thanks w to you.

do you have any tips for memorizing the algorithms?

I think the single capital/lowercase letter turns are confusing if you use other sources, that have caps. and lower case if u turn both. (i.e., Rr, Ff.)

when ever i do the last layer edges parity error

my cube messes up

what do you think is the problem

i'm doing it just like you've shown it

You have done a wonderful job. But these steps are complicated. I have the simpler steps which can make solving rubik cube 4x4 simple. You didn't mentioned the parity error which is the possibility in 4x4 cube. If anybody wanna know you can reach me on sayed_salman321@yahoo.co.in

Thank you

I am really sorry I didn't see the page clearly you have mentioned the parity error. My bad. I apologize once again. thank you

I sometimes have a problem when doing the last edge pieces. i seem to not be able to put them in the right place. eg: presuming yellow is on the top of my cube, my bottom red&white edge is in my blue side and my blue&white edge is in my red side but my orange and green sides are perfect. What is the algorithm to fix this?

thank you so much!!! helped a lot!

Question to forum for my son:

My 8 yr old son has become a cube fan. I personally cannot solve it, but he can do the 3x3 and is now working on the 4x4.

Here's the question - He says he has tried using his 3x3 approach on the 4x4 and gets to a point where he solves the top three layers, with just the bottom layer remaining. This seems to be a different approach than that advocated above. Can it be solved his way? I don't want him wasting weeks on approach that is a dead end...

The top three layers is great he can do it.

yes you can, i do it top down way, my link http://hubpages.com/games-hobbies/now-on-to-the-4x...

doing it this way you have just one Parity Error.

Why put inverse primes on squares moves, like B2' - might as well just write B2.

Thank you

this guide was very well writen and is now going to help me to put the steps to memory, thank you. i have been doing the 3x3 for about a month and needed something else to fill my time on deployment, thanks again.

V/r,

LS3 Heidelberger, Travis,

LSD-41 USS Whidbey Island.

im nt able to get the edges properly which is the second step

I have been able to apply the method used in the 3x3 for the two steps before I get to the one last corner. When I am starting, I still have to figure it out the centers by myself, without any algorithms or such.

Bad decision to use r,l,d etc to show double turns. 80% of the guides out there use lowercase to show ONLY THE INNER ROW. I know you make it very very clear, but theres a ton of people who won't read and will only look at the image to refresh their mind on the parity parts, and many, many people have trouble with this.

It its very confusing!!! Corner in a line parity, has a spot where L2-l2. So what? Am I turning that top layer 4 times? Because you say lowercase means to turn bother inner and outer rows.

Standard annotations would be Uu, Ll,Rr,Bb.

And much, much clearer.

There are many mistakes in this guide and it's been around for 6 years.

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