The Y-Perm Challenge

[NitroCuber7]

An very impossible challenge.

Objective: solve the cube using ONLY Y-PERMs
(for beginners it’s F R U’ R’ U’ R U R’ F’ R U R’ U’ R’ F R F’)

before solving: perform a T-Perm on your cube
(for beginners it’s R U R’ U’ R’ F R2 U‘ R’ U’ R U R’ F’ )

I haven’t solved yet but here’s a hint: it’s impossible to do this without turning the cube sideways.

good luck

 

[Deleted member 52530]

I will try

Also, can you do rotations and auf

 

[NitroCuber7]

only rotations of the whole cube (x,y,z,x’,y’,z’)

 

[PetrusQuber]

Tip: Try find a way to use lots of Y Perms and y rotations which end up in an AUF. The same kind of idea that doing J Perm y J Perm y J Perm is an AUF. So far I’ve only been able to discover how to do double AUFs, not very helpful, unless someone has an all double move T Perm.

 

[kubesolver]

Here is an easier problem:

Using only Y-perms Try to move red corner to a green position.

 

[Cubinwitdapizza]

If u can solve it with a j perm then you can probably solve it with a y perm

 

[Deleted member 51471]

Here is an easier problem:

Using only Y-perms Try to move red corner to a green position.

If you could find a y perm that would require an auf afterwards...

 

[Cubinwitdapizza]

No you just don’t do the f at the beggining. It’s the Alg that you use in Pochmann blind for corners.

 

[xyzzy]

No you just don’t do the f at the beggining. It’s the Alg that you use in Pochmann blind for corners.

That's… obviously not a Y perm?

If you could find a y perm that would require an auf afterwards...

Like R2 U' R2 U' R2 U2 F' L' F R2 F' L F, perhaps?

I guess OP meant that you should only use the one Y perm alg that they listed, though; if you had both this and the standard alg, you could generate U moves directly, and things would be much easier.

And for that matter, what if you had only this Y perm alg, and you're not allowed to use the standard Y perm alg?

Spoiler

I know the answers, but I'm not going to immediately spoil it since (i) it's not my thread, not my call; and (ii) it's interesting to work these out on your own anyway. @kubesolver's post is a gigantic hint.

 

[ProStar]

An very impossible challenge.

Objective: solve the cube using ONLY Y-PERMs
(for beginners it’s F R U’ R’ U’ R U R’ F’ R U R’ U’ R’ F R F’)

before solving: perform a T-Perm on your cube
(for beginners it’s R U R’ U’ R’ F R2 U‘ R’ U’ R U R’ F’ )

I haven’t solved yet but here’s a hint: it’s impossible to do this without turning the cube sideways.

good luck

I did it. It was pretty simple, I just applied the same concepts that J Perm used in his video. I got a CO skip though, so that made it easier

 

[shadowslice e]

I did it. It was pretty simple, I just applied the same concepts that J Perm used in his video. I got a CO skip though, so that made it easier

Are you sure you did? I'd like to see your solution if you did.

 

[WoowyBaby]

This challenge is impossible, you cannot swap corners adjacently with only diagonal swaps. The corners will always remain in their own tetrads.

Yet people say they have found solutions to this. This doesn't make any sense.

 

[Micah Morrison]

yeah I think it's impossible because a T perm swaps 2 corners adjacent and a Y perm can only swap corners diagonally.

 

[ProStar]

This challenge is impossible, you cannot swap corners adjacently with only diagonal swaps. The corners will always remain in their own tetrads.

Yet people say they have found solutions to this. This doesn't make any sense.

Oh, my bad. Thought he said t-perms and y-perms since he talked about both

 

[NitroCuber7]

yeah I think it's impossible because a T perm swaps 2 corners adjacent and a Y perm can only swap corners diagonally.

ya, me too, but I think there rather is a move to get out of this

 

[NitroCuber7]

If it is truly impossible, then here‘s a similar challenge:

same rules but you may do one move (or an cube rotation) between y-perms but you‘ll have to redo them the next time (not including cube rots)

 

[Etotheipi]

Maybe if you scramble with just Y perms it could be nice, but since you cant solve an adjacent corner swap with just diag swaps it will normally be impossible.

 

[ProStar]

If it is truly impossible, then here‘s a similar challenge:

same rules but you may do one move (or an cube rotation) between y-perms but you‘ll have to redo them the next time (not including cube rots)

What prevents you from doing U yperm*2 then ur next move?

 

[brododragon]

If it is truly impossible, then here‘s a similar challenge:

same rules but you may do one move (or an cube rotation) between y-perms but you‘ll have to redo them the next time (not including cube rots)

So you can do a move but you'll have to undo it?

 

[Deleted member 36445]

next up:

the lick your elbow challenge