# 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.

.

## 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:

Scroll to Continue

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

## 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:

## 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.

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 Diagonal

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

ruchi on March 27, 2017:

It is very cool game.

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.

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

StefanMDP (author) on August 31, 2011:

Hi Travis.

Thank you for your kind words. I'm glad you find this tutorial useful.

LS3 Heidelberger, Travis on August 30, 2011:

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.

Redundancy on August 25, 2011:

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

Frank W Choate Jr from FEDERAL WAY, WA on May 12, 2011:

The top three layers is great he can do it.

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

doing it this way you have just one Parity Error.

StefanMDP (author) on April 28, 2011:

It looks to me like "Solving a Last Layer" (Top or Bottom). I do not see a problem.

Larrysc on April 28, 2011:

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...

StefanMDP (author) on April 15, 2011:

piinut on April 15, 2011:

thank you so much!!! helped a lot!

StefanMDP (author) on April 14, 2011:

Hi Piinut.

If I understand correctly, you have two Dedge pieces in the bottom of the cube to permute.

Place White in the top of the cube, and continue with Adjacent Dedges:

https://discover.hubpages.com/games-hobbies/rubiks...

piinut on April 14, 2011:

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?

StefanMDP (author) on April 02, 2011:

Hi Salman

You are welcome.

Salman on April 02, 2011:

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

Salman on April 02, 2011:

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

StefanMDP (author) on April 01, 2011:

Hi Jahanzeb

jahanzeb on April 01, 2011:

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

StefanMDP (author) on December 30, 2010:

You see, it is impossible to satisfy all the people ;)

anonymous on December 29, 2010:

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.)

anonymous on November 28, 2010:

do you have any tips for memorizing the algorithms?

Christopher ... on November 17, 2010:

thanks w to you.

StefanMDP (author) on August 14, 2010:

Hi Sara, thanks for stopping by.

I am happy to be of help.

sara_91 on August 14, 2010:

finally I got it..thanks 8-)

StefanMDP (author) on August 06, 2010:

Hi Hans

I suppose that you have confused a movement (x) with a movement (X).

Please, see the difference between the movements here:

https://discover.hubpages.com/games-hobbies/how-to...

In the images, a movement (x) is shown with a double-arrow, please be careful.

HansMueller on August 05, 2010:

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?

StefanMDP (author) on July 10, 2010:

All the movements make what the images show.

As I said before, in this tutorial the r,l,u,d,f,b movements rotates two layers.

Drew16 on June 18, 2010:

correction, I do think they are misprinted, sorry.

Txontirey Avatar on June 05, 2010:

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

Drew16 on June 04, 2010:

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.

StefanMDP (author) on March 22, 2010:

Hi Smeone.

Those are great news!

You are welcome here. You can stop by and share your Rubik's Cube experiences whenever you want.

Smeone765 on March 21, 2010:

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!!!!!!!!!!!!!!!!!!

StefanMDP (author) on March 20, 2010:

Hi Daz.

I'm glad you liked it, the feedback is really appreciated. Thankyou.

Daz on March 19, 2010:

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

Thanks again.

StefanMDP (author) on March 18, 2010:

Don't worry, no trouble at all.

May be you have found a parity error that I don't know.

If you find a solution, please let me know, I will be glad of including it here as your contribution.

Smeone765 on March 18, 2010:

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

Sorry for all the trouble I caused.

StefanMDP (author) on March 17, 2010:

It is really strange, provided that the incomplete cross is the same one.

I ask for the movements because in some tutorials the r,l,u,d,f,b movement only rotates the internal layer, and here two layers (internal and external) are rotated.

This is my only thought.

(The video I posted is not mine, it belongs to Rob Homayoon)

Smeone765 on March 17, 2010:

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!!

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

StefanMDP (author) on March 16, 2010:

Hi Someone :)

A couple of questions:

- Your incomplete cross, looks like the one shown in the image?

- Is it clear for you the difference between, for example, the r movement and the R movement?

(There is no problem with the movements shown in the image)

Smeone765 on March 16, 2010:

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!

StefanMDP (author) on February 21, 2010:

Hi Josse, thanks for stopping by.

I see no problem with the movements, they are even similar to those of the video. Perhaps you are not doing exactly what is shown.

Anyway, when solving the Rubiks cube, no method is the only method. If you find a sequence of movements that works, stick with it.

Josse on February 21, 2010:

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

Rob on February 17, 2010:

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

wilson on November 08, 2009:

i cant finish the incomplete cross?

StefanMDP (author) on November 07, 2009:

Wilson on November 07, 2009:

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

Rob on August 03, 2009:

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

StefanMDP (author) on August 02, 2009:

Hi Rob

Ops! Sorry.

The image of the incomplete cross was erroneous.

Now it is corrected. Hope this helps.

Rob on August 02, 2009:

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.

Yuki on March 16, 2009:

It is very good, the details are said clearly.

StefanMDP (author) on March 03, 2009:

I have responded to you here

https://discover.hubpages.com/games-hobbies/how-to...

bobbybrennan on March 02, 2009:

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.