PLL & OLL on a 2x2

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PLL & OLL on a 2x2

Postby cubesolver001 » Thu Jun 16, 2011 8:57 am

Hello.

I got a 2x2x4 Rubik's Cube and i solved it one time ( with a lucky solve ).
Now i need to learn PLL and/or OLL to switch two edges.

The video I use is this:

http://www.youtube.com/watch?v=kuMFjOLm ... re=related
He is talking about PLL to solve that to edges and he talks about t-perm ( I don't know if i say it good :| ).

Can somebody tell it me or can somebody give some tips?
Thanks :).
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Re: PLL & OLL on a 2x2

Postby Zeotor » Thu Jun 16, 2011 5:34 pm

In that video, he used the T permutation (perm) to switch the two edges in the middle 2x2x2 block. On the 2x2x2 cube, the T perm switches the two corners in the upper right side of the cube. On the 2x2x4, those corners are edges and the algorithm still switches them. The T perm is R U R' U' R' F R2 U' R' U' R U R' F'.

In the video, he also mentioned the Y perm. It is F R U' R' U' R U R' F' R U R' U' R' F R F'. It switches the back/left and front/right corners in the top layer on a 2x2x2. I'm guessing that if you do that on the 2x2x4, it won't change the shape in the end like the T perm did.

There are shorter T perm and Y perm alternatives for the 2x2x2, but I'm not sure if they would mess up the shape of the 2x2x4 if you used them. If you want to try them, here are two of them.
T perm - U' R' U L' U2 R U' R' U2 R L
Y perm - R U' R' U' F2 U' R U R' D R2
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Re: PLL & OLL on a 2x2

Postby cubesolver001 » Fri Jun 17, 2011 9:21 am

Thank Zeotor :).

And I'll will try the shorter T and Y perm on the 2x2, if I'm healed from my hand injury ;) .
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Re: PLL & OLL on a 2x2

Postby Zeotor » Fri Jun 17, 2011 2:48 pm

No problem.
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