Help with 6X6X6 last two centers

[luoliveira75]

Hi there. I have find a weird situation in the 6X6X6 cube, when finishing the last two centers. I end with only one piece to change position, but they are in the center diagonal, and the simple commutator algorithm does not work to solve this. Do anyone know some other algorithm or method to solve this? The picture below shows the situation:

I have been searching over the internet and youtube, but all tutorials I have found just shows sollutions to commutate pieces with are not in the center diagonal. I would appreciate any help. Thanks.

 

[John_NOTgood]

But wouldn't it be like trying a commutator on a 4x4 center?, since the alg on it would be r U' l' U r' U' l (on 4x4), but you would do it on the inner 2 slices on 6x6

 

[BenChristman1]

Go to 5:10 in this JPerm video. He explains big cube center commutators very well.

 

[Garf]

When it comes to centers for 6x6 and 7x7, try to start collumns from the left and go right. You will avoid that trouble as you solve.

 

[Melvintnh327]

I would recommend you do the last 2 centers in this order:

for that case, you do:
3R U' 3L' U 3R' U' 3L

 

[xyzzy]

It's very helpful to learn how the commutators work, rather than treating them as algs you apply blindly. Ultimately, it's a 3-cycle of centre pieces – just that two of them have the same colour, so it looks like you're only swapping two centre pieces. Once you understand commutators, you can use them for any piece type on any big cube.

The "true" form of the commutator includes an extra U move:
3R U' 3L' U 3R' U' 3L U

(Think of the labels as being for the positions, not the pieces themselves.)

Doing 3R moves the orange piece at A to B, while moving the green piece at B to the back face; doing U' 3L' U inserts the green piece at C into B, kicking out an orange piece; doing 3R' brings the back-face green piece into B, while moving another green piece into A; doing U' 3L U reinserts the orange piece that was kicked out before back into B.

Net result: a 3-cycle of centre pieces, with the piece at A going to B, the piece at B going to C, and the piece at C going to A.

(The U move at the end is usually omitted because after the first seven moves, the centres are already all solved, but having it there makes it clearer why it's called a commutator, especially if you've also seen other types of commutators before (e.g. the A perm algs).)

------

Alternative solution: (U) 3R U 3R' U 3R U2 3R'. Less grip shifts, but is slightly longer. Same concept as solving the last outer corner piece.

 

[Megaminx lover]

Hi there. I have find a weird situation in the 6X6X6 cube, when finishing the last two centers. I end with only one piece to change position, but they are in the center diagonal, and the simple commutator algorithm does not work to solve this. Do anyone know some other algorithm or method to solve this? The picture below shows the situation:

I have been searching over the internet and youtube, but all tutorials I have found just shows sollutions to commutate pieces with are not in the center diagonal. I would appreciate any help. Thanks.

alg.cubing.net

alg.cubing.net

 

[LBr]

Hi there. I have find a weird situation in the 6X6X6 cube, when finishing the last two centers. I end with only one piece to change position, but they are in the center diagonal, and the simple commutator algorithm does not work to solve this. Do anyone know some other algorithm or method to solve this? The picture below shows the situation:

I have been searching over the internet and youtube, but all tutorials I have found just shows sollutions to commutate pieces with are not in the center diagonal. I would appreciate any help. Thanks.

The same commutator is applied on 6x6, you just do it from different slices and adapt it to which piece is missing

For that case, you would use 3RW U' l (inner) U 3RW' U' l

 

[Megaminx lover]

The same commutator is applied on 6x6, you just do it from different slices and adapt it to which piece is missing

For that case, you would use 3RW U' l (inner) U 3RW' U' l

Yes, that's correct

 

[xyzzy]

Yes, that's correct

The idea is correct; the notation is completely wrong.

 

[LBr]

lol didnt know what the inner layer left slice move was