Help with 4x4x4 Blindfolded?

[rahulkadukar]

Can you please tell me an optimum algorithm that swaps an Edge piece on UF (Right or left does not matter) and UB (Right or left does not center) on a 4x4x4

It should not be supercube safe and must be as fast as possible

 

[HASH-CUBE]

if only two single edges, then this is a parity case, where you use a parity algorithm for it...

but first, what method you will use for 4x4 BLD edges? is it r2? if so, then 2 diagonal edges (not on the same layer like you said) must be swapped, the one to use is to swap DF and UB

but you can swap UF and UB by placing the UB edge next to the UF edge, then preform the parity algorithm (the one for normal speedsolving) then undo the moves to get the edge back to UB

l2 B2 l2 (parity algorithm with only moving inner slice for R and L NOT OUTTER) l2 B2 l2

l2 = only inner L slice NOT OUTTER

so , if it was me, i'd use this parity algorithm

l2 B2 l2 (r2 B2 U2 l U2 r' U2 r U2 F2 r F2 l' B2 r2) l2 B2 l2

hope this helps

 

[shelley]

Note that the OLL parity alg is not center safe, so if your setup moves involve slices that mess up the U center, you will have to turn the U center 180 before undoing those setup moves.

 

[HASH-CUBE]

yea i forgot to say that too, but the thing is, i solve all centers first, then i don't worry about it...

and the algorithm i posted, i tried to figure it out such that if centers where solved, will not affect it.

 

[rahulkadukar]

I know that there is one more alg that just swaps the two Edges and that does not involve the OLL parity alg. I am looking for that one.

 

[Faz]

r U2 r U2 F2 R F2 l' U2 l U2 r2 ?

 

[Pedro]

I use x2 r2 U2 r' U2 l U2 l' U2 x l' U2 r' x

swaps UFr and UBr

I'm not entirely sure if it's correct, don't have a 4x4 with me right now, but I think it should work

 

[rahulkadukar]

r U2 r U2 F2 R F2 l' U2 l U2 r2 ?

Faz this is definitely wrong

 

[Sakarie]

r' U2 r2 U2 r U2 r U2 r2 l U2 r' U2 r U2 l' U2

Changes DF and UB, and is therefor perfect for r2.

 

[aronpm]

r U2 r U2 F2 R F2 l' U2 l U2 r2 ?

Faz this is definitely wrong

Change that R into an r. He meant r U2 r U2 F2 r F2 l' U2 l U2 r2.

 

[rahulkadukar]

r U2 r U2 F2 R F2 l' U2 l U2 r2 ?

Faz this is definitely wrong

Change that R into an r. He meant r U2 r U2 F2 r F2 l' U2 l U2 r2.

That is the exact algorithm that I was looking for. Thank you very much

 

[Pedro]

I use x2 r2 U2 r' U2 l U2 l' U2 x l' U2 r' x

swaps UFr and UBr

I'm not entirely sure if it's correct, don't have a 4x4 with me right now, but I think it should work

I was missing a U2

x2 r2 U2 r' U2 l U2 l' U2 x U2 l' U2 r' x