#### IAmAPerson

##### Member
Is there a 4x4 method that reduces it to a 2x2 instead of a 3x3? I would like trying some new methods.
I did a solve like this (it's on my youtube channel). It's much more difficult than 3x3 reduction and is much less efficient.

##### Member
People have tried it before, but I don't think anyone's come up with a decent speed method.
Challenge accepted ;-P

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#### IAmAPerson

##### Member
Challenge accepted ;-P

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Can't wait to see this. I used a blockbuilding method for my 4x4->2x2 solve. I already suck at 3x3 blockbuilding, so I was super slow and inefficient during my solve. However, 4x4 LBL is a legitimate speedcubing possibility in my opinion. If I ever buy a 7x7 or whatever, I'll probably record a 7x7 LBL solve.

#### Ordway Persyn

##### Member
Is there a 4x4 method that reduces it to a 2x2 instead of a 3x3? I would like trying some new methods.

There is someone I know who says thats how he solves a 4x4.

#### Tahrbo

##### Member
I have a 4x4 windmill cube with 2 adjacent corners swapped. When I try to use: 2R2 U2 2R2 u2 2R2 2U2, the center of my F slice gets scrambled (and it has a specific orientation due to the cube being a windmill cut).

Is there an algorithm to fix 2 adjacent corners on the top layer of a 4x4? I don't care if the top layer gets scrambled (as you can see the algorithm I already use for normal 4x4 cubes does that), I just need one that doesn't affect the layers below U.

#### Berd

##### Member
I have a 4x4 windmill cube with 2 adjacent corners swapped. When I try to use: 2R2 U2 2R2 u2 2R2 2U2, the center of my F slice gets scrambled (and it has a specific orientation due to the cube being a windmill cut).

Is there an algorithm to fix 2 adjacent corners on the top layer of a 4x4? I don't care if the top layer gets scrambled (as you can see the algorithm I already use for normal 4x4 cubes does that), I just need one that doesn't affect the layers below U.
You could use 4bld center algs I think.

#### Tahrbo

##### Member
You could use 4bld center algs I think.

Can you suggest one algorithm in particular? When I Googled "4bld center algs" I got these links, among others:

Much of the terminology is lost on me. Methods I've never even heard of are discussed. I couldn't even blindfold a 3x3 out of a paper bag let alone a 4x4. I'm just looking for a specific variant of the Swapped Corners aka Swapped Edges algorithm.

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#### Berd

##### Member
Try these, Holding the center on the U face.

[(r' u r) U (r' u' r) U] [(r' u r) U2 (r' u' r) U2]
[(r' u r) U' (r' u' r) U'] [(r' u r) U2 (r' u' r) U2]

#### NickE

##### Member
Do I need to learn yau on 4x4 to be sub 1:30

#### supercavitation

##### Member
Do I need to learn yau on 4x4 to be sub 1:30

No, but you're better off doing so.

#### Ordway Persyn

##### Member
Do I need to learn yau on 4x4 to be sub 1:30

not really, you could also use Hoya, its almost, if not as fast a method as Yau. I average around 1:03 with it you should at least check it out

#### NickE

##### Member
not really, you could also use Hoya, its almost, if not as fast a method as Yau. I average around 1:03 with it you should at least check it out

Do you recommend any tutorials

#### TheCuber13

##### Member
4x4x4 parity

I am trying to solve a 4x4x4, but I have one problem. (y=yellow x=any color)

y y y y

y y y y

y y y y

y y y X

I need help on that (They are in the right coloring position)
thanks

#### Dene

I'm confused... one of the corners isn't oriented properly? You'd fix that the same way you would for a corner on any other nxnxn puzzle.

If the rest of the puzzle is solved and only the corner is off then it's twisted and unsolvable.

#### caters

##### Member
Black powder in the cube?

I have had a piece pop out of my 4x4 twice(It wasn't the same piece that popped out though). I always wash my hands after I put the piece back in correctly.

But anyway I get this smooth black powder on my hands after putting the piece back in and not after solving it so I know it is coming from the inside. How do I know it is a powder? Well it looks like a solid and stays on my hands until I wash it off with water. I doubt it is rubber on the inside and I think it is plastic.

But could the moves of the cube(slice moves and everything else except rotations) be grinding up plastic from the inside out thus causing me to get powdered plastic on my hands when I put a piece that has popped out, back in?

It mostly turns smoothly(an occasional catching here and there) and it started off very rigid and wouldn't turn unless it was just so. Now it can corner cut a little bit but not as much as my 3x3 can. This is all due to time using it. No lube has been used and this wasn't second hand(new packaging, new instructions)

This is the same rubiks revenge that I didn't know the color scheme of until I asked here.

##### Member
I have had a piece pop out of my 4x4 twice(It wasn't the same piece that popped out though). I always wash my hands after I put the piece back in correctly.

But anyway I get this smooth black powder on my hands after putting the piece back in and not after solving it so I know it is coming from the inside. How do I know it is a powder? Well it looks like a solid and stays on my hands until I wash it off with water. I doubt it is rubber on the inside and I think it is plastic.

But could the moves of the cube(slice moves and everything else except rotations) be grinding up plastic from the inside out thus causing me to get powdered plastic on my hands when I put a piece that has popped out, back in?

It mostly turns smoothly(an occasional catching here and there) and it started off very rigid and wouldn't turn unless it was just so. Now it can corner cut a little bit but not as much as my 3x3 can. This is all due to time using it. No lube has been used and this wasn't second hand(new packaging, new instructions)

This is the same rubiks revenge that I didn't know the color scheme of until I asked here.
Yes, that's what happens when you are breaking a cube in; certain pieces get rubbed against each other so they fit together nicer hence why well used cubes are nicer than new ones out of the box.

It also happens to a certain extent when you put lube in but not as much though it is worth putting some lube in when it is well broken in.

#### Robinbar

##### Member
Hi,
I am solving 4x4 with yau method and I use 3-2-3 edge pairing.
Once the cross and centers are done I always slice(uw'), put pieces in but sometimes I can only solve 2 pairs because certain pieces are next to a piece that I wanna slice back on.
And then I sometimes end up solving the next 2 pairs, and then I get messed up. Because then I have to solve 3 more, and for instance I slice and then the last 3 pairs are solved but the centers are misaligned, and when I slice the back I break up the last 3
pairs. And what sometimes happens is that with the last 3 pairs, I slice and then I have one pair solved but then I have a two pair(where you do an edge flip), but again the centers are not aligned.

#### TheoLyh

##### Member
Hi. ive began to train 4x4 again but i have problems with the cross edges/dedges. ive seen some of the really good cubers rotate the cube so they have the center with the dedges they are going to solve on the left or right side or something. Why are they doing that and is it a good idea to use it?... ps. i average ~ 1:10 sec

Im maybe totaly wrong here. I hope you can answer.

#### MattyAB

##### Member
I've just been trying to learn Yau via JKC's tutorial (can be found here), and in the scramble she provides, there are some weird 2Rw and 2Rw2 moves...
Pretty sure that isn't proper notation...

What are these?
Are they equivalent to a certain move, or are they something else...?

Thanks!