# [Help Thread]Big Cube Discussion (5x5 / 6x6 / 7x7 / etc)

#### I'm A Cuber

##### Member
I would say its easier to get better at edge pairing than center building.
Tell that to my 7x7 solves

#### Kaneki Uchiha

##### Member
I avg 2:10 on 5x5. How can I improve? I use yau
I have done like 200 timed solves and gone down from 3:15

#### Nmile7300

##### Member
I avg 2:10 on 5x5. How can I improve? I use yau
I have done like 200 timed solves and gone down from 3:15
Not trying to be rude, but weren't you going to get a critique from me?

#### Kaneki Uchiha

##### Member
Not trying to be rude, but weren't you going to get a critique from me?
Yes, I was going to film last week but couldn't because of something personal I will film today most probably

#### Pooker08

##### Member
hey I'm not a beginner i average around 20 secs on 3x3 and just got a 7x7 does anyone know how many parity's there are on a 7x7? And if so what are there algorithims.

#### GenTheThief

##### Member
There are still only 2 parities that can happen on 7x7, although they can happen multiple times each. The algorithms are the same as on 5x5, which are the same for 4x4, just adapted slightly to account for the center slice.

#### Kaneki Uchiha

##### Member
when should I learn l2c and l2e algs I avg 1:50 on 5x5

#### xyzzy

##### Member
when should I learn l2c and l2e algs I avg 1:50 on 5x5
Any time you want to.

Treat L2C like F2L (or F2B, since you're a Rouxer): look at the algs to make sure you know what the efficient solutions are, but learn them by looking at how the pieces split apart and join together.

Priority for L2E algs should be (from highest to lowest):
1. all basic slice-flip-slice cases (including the double midge flip)
2. r U2 r U2 F2 r F2 l' U2 l U2 r2 (execute as r U2 r U2 x U2 r U2 3r' U2 3r B2 r2)
3. r2 F2 U2 r2 U2 F2 r2 (looks like PLL parity)
4. (F U' R U') (r2 F2 U2 r2 U2 F2 r2) (this case is missing from many alg sheets, including Speed Cube DB at the time of writing (!))
5. r U2 r2 U2 r' U2 r U2 r' U2 r2 U2 r and the inverse (diag checkerboards; this is the only L2E case where the best alg happens to be rU 2-gen)
6. all of the rest

#### Kaneki Uchiha

##### Member
Any time you want to.

Treat L2C like F2L (or F2B, since you're a Rouxer): look at the algs to make sure you know what the efficient solutions are, but learn them by looking at how the pieces split apart and join together.

Priority for L2E algs should be (from highest to lowest):
1. all basic slice-flip-slice cases (including the double midge flip)
2. r U2 r U2 F2 r F2 l' U2 l U2 r2 (execute as r U2 r U2 x U2 r U2 3r' U2 3r B2 r2)
3. r2 F2 U2 r2 U2 F2 r2 (looks like PLL parity)
4. (F U' R U') (r2 F2 U2 r2 U2 F2 r2) (this case is missing from many alg sheets, including Speed Cube DB at the time of writing (!))
5. r U2 r2 U2 r' U2 r U2 r' U2 r2 U2 r and the inverse (diag checkerboards; this is the only L2E case where the best alg happens to be rU 2-gen)
6. all of the rest
I use yau and some of those algs distrupt the cross is there a sheet for l2e with cross?

#### Queenofkings

##### Member
I used to solve the 5x5 by doing the 4x4 first (ignoring the middle slice) then solving the 3x3 (big corners) to get the edges. That would bring me to the attached photo where I had a technique to swap the center edges until they were complete, finally solving the 3x3 with big centers to finish. That was years ago and I’ve forgotten what technique I used - muscle memory is giving me: u M u’ M’ after rotating the outer slices to get the configuration I want but of course that algorithm messes with all the centers so even if I get one right the others are screwed up. Does anyone have a suggestion? All of the center fixes I can find are for before the edges are done.

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#### BenChristman1

##### Member
I used to solve the 5x5 by doing the 4x4 first (ignoring the middle slice) then solving the 3x3 (big corners) to get the edges. That would bring me to the attached photo where I had a technique to swap the center edges until they were complete, finally solving the 3x3 with big centers to finish. That was years ago and I’ve forgotten what technique I used - muscle memory is giving me: u M u’ M’ after rotating the outer slices to get the configuration I want but of course that algorithm messes with all the centers so even if I get one right the others are screwed up. Does anyone have a suggestion? All of the center fixes I can find are for before the edges are done.
Go to 5:10 in the video. He uses a 6x6 for his example, but it works for any big cube.

#### Queenofkings

##### Member
Go to 5:10 in the video. He uses a 6x6 for his example, but it works for any big cube.

Thanks for the suggestion, but that disrupts the edges. I’m looking for a way to move the center pieces without having to redo the edges.

#### Nmile7300

##### Member
Thanks for the suggestion, but that disrupts the edges. I’m looking for a way to move the center pieces without having to redo the edges.
It is much better and faster to solve the centers before the edges on big cubes. The only real exception is the Yau method and even then, that's just a few edges, not all of them.

#### xyzzy

##### Member
I used to solve the 5x5 by doing the 4x4 first (ignoring the middle slice) then solving the 3x3 (big corners) to get the edges. That would bring me to the attached photo where I had a technique to swap the center edges until they were complete, finally solving the 3x3 with big centers to finish. That was years ago and I’ve forgotten what technique I used - muscle memory is giving me: u M u’ M’ after rotating the outer slices to get the configuration I want but of course that algorithm messes with all the centers so even if I get one right the others are screwed up. Does anyone have a suggestion? All of the center fixes I can find are for before the edges are done.
Commutators. Some examples:
3R U 3R' 2U 3R U' 3R' 2U'
3R U 2R U' 3R' U 2R' U'

#### DNF_Cuber

##### Member
You can basically do niklas but with slices for the Ls and Rs

#### Queenofkings

##### Member
It is much better and faster to solve the centers before the edges on big cubes. The only real exception is the Yau method and even then, that's just a few edges, not all of them.
[/QUOT
It is much better and faster to solve the centers before the edges on big cubes. The only real exception is the Yau method and even then, that's just a few edges, not all of them.
Yeah that’s how I do it now, I used to use the 4x4 method I described when I taught other people how to do it it b/c it was easier for them sometimes.

#### ABCubeTutor

##### Member
I used to solve the 5x5 by doing the 4x4 first (ignoring the middle slice) then solving the 3x3 (big corners) to get the edges. That would bring me to the attached photo where I had a technique to swap the center edges until they were complete, finally solving the 3x3 with big centers to finish. That was years ago and I’ve forgotten what technique I used - muscle memory is giving me: u M u’ M’ after rotating the outer slices to get the configuration I want but of course that algorithm messes with all the centers so even if I get one right the others are screwed up. Does anyone have a suggestion? All of the center fixes I can find are for before the edges are done.

my new method solves this, and also offers a new way to solve the 5x5x5. https://www.speedsolving.com/wiki/index.php/ABCube_Method

not to pat my own back, but there is a new method for solving big cubes, and it undoes parity and eliminates memorizing algorithms. it is https://www.speedsolving.com/wiki/index.php/ABCube_Method it is not great for speedcubing, but excels at large cubes, it does the centers last because the parities can be erased by a simple center slice turn,

#### TheSlykrCubr

##### Member
what should i average on 6x6? I use Redux btw

average under 1:10 on 4x4 (Yau)
and under 2:30 on 5x5 (Redux)