Swapping UFL and URL corners? (4x4x4)

[StringStrider]

So I have my 4x4x4 (almost) totally solved using the 3x3x3 method. My UFL and URL corners are in the incorrect spots and I can not seem to find an alg to swap them out without entirely screwing up my cube.

Thanks in advance!

Edit: Realized while I was outside having a cigarette that I typod... URL doesn't exist lol... UFR and UFL is what I meant

-Cam

 

[iSpinz]

The algs will just make you have to do your OLL and PLL again.

 

[James Ludlow]

From there I'd do (U2 or y2) (T-Perm) y Uw2 Rw2 U2 r2 U2 Rw2 Uw2

 

[Shortey]

Robert had a trick for this in the Big Cube Tips and Tricks thread.

 

[retr0]

x [(R' U R') D2] [(R U' R') D2] R2

then either the U, X, Z or H perm.

 

[cookingfat]

From there I'd do (U2 or y2) (T-Perm) y Uw2 Rw2 U2 r2 U2 Rw2 Uw2

I'd do that too (with the other parity alg), but if there's a faster/better way, I'm all ears....

swaps UFL and UBL

My way - y2 (T-perm) y (r2 U2 r2 Uw2 r2 u2)

x [(R' U R') D2] [(R U' R') D2] R2

then either the U, X, Z or H perm.

That's just an A-perm, it won't work as only two adjacent corners need swapping. (parity)

edit - James, that parity alg is is not bad, I might switch.

 

[blah]

How did no one not notice that a URL corner does NOT exist?

 

[StringStrider]

Oops, meant UFR, and UFL.

I'm kind of a noob with regards to the OLL and PLL stuff (don't even know what it means lol) I'll go look it up now. I know algorithm notation but the advanced algs are pretty much over my head at this point.

I've only been cubing a month or so and I can basically solve a 3x3x3 using the beginner algorithms in about 2 minutes on average, and decided to move up to a 4x4x4 so I got one 2 days ago, and this little "bug" has been plaguing me since then :fp

-Cam

 

[James Ludlow]

Oops, meant UFR, and UFL.

Y-perm U2 (sexy move) (Parity alg) (antisexy) U2

EDIT - I misread what you wrote. This would work with UFR and UBL though.

 

[masterofthebass]

Oops, meant UFR, and UFL.

Y-perm U2 (sexy move) (Parity alg) (antisexy) U2

EDIT - I misread what you wrote. This would work with UFR and UBL though.

Yeah, that's bad...

UFL and UBR should be:

L U L' (parity alg) y' R U R' U' R' F R2 U' R' U' R U R' U' F' (that's a Tperm with cancellation)

 

[StringStrider]

Just to make sure I'm naming them right, Im holding my cube with yellow on the top, white on the bottom, and it was yellow/blue/red (UFL) and yellow/red/green (UFR) corners that were switched.

 

[cookingfat]

Just to make sure I'm naming them right, Im holding my cube with yellow on the top, white on the bottom, and it was yellow/blue/red (UFL) and yellow/red/green (UFR) corners that were switched.

Basically, you have PLL parity. You'll have to learn about parity if you want to solve a 4x4x4 cube using a reduction method.

If you do a PLL parity algorithm (this swaps just two edge pairs on the U layer) you will be able to solve the last layer as you normally would.

some PLL parity algs you can use >

r2 U2 r2 Uw2 r2 u2
or
Uw2 Rw2 U2 r2 U2 Rw2 Uw2

These will swap UF and UB edge pairs.

The particular case you have can be solved more optimally if you know the T-perm, put the unsolved corners to the right side, do a T-perm and you'll be left with 2 opposite edge pairs to swap. Do the parity alg to solve these.

If you don't know T-perm, just do the parity alg and solve the last layer again.

 

[James Ludlow]

Yeah, that's bad...

Hey, its all I had lol.

Thanks for that one though. Thats now written in my little mental notebook.

 

[cookingfat]

Yeah, that's bad...

Hey, its all I had lol.

Thanks for that one though. Thats now written in my little mental notebook.

Mine too, it's much better. Thanks!