What is a Pseudo Block?

[Radical Seal]

Can someone tell me what a pseudo block is??

 

[MiloD]

for example, if you did step 1 in petrus normally then in step 2 you saw a nice opporitunity to build the wrong 2x2x1 block in few moves and put it at the end of your 2x2x2 for later use, then that block would be a pseudo block.

 

[Radical Seal]

Thanks for the reply. I have one more quick question.
Do this on your cube: RU'LU'L'U'LU2R'L'ULU'
What is the purpose of that?

 

[Lucas Garron]

Thanks for the reply. I have one more quick question.
Do this on your cube: RU'LU'L'U'LU2R'L'ULU'
What is the purpose of that?

You're probably missing a move. Looks like a 3-gen Headlights (T) OCLL alg (like mine, except mine is 11 moves ).

I hope that's not supposed to be an F2L alg...

 

[Radical Seal]

I dont think I am missing a move...I might post a picture later

 

[MiloD]

Well it looks like there is a pseudo block built on the bottom of the right face. So I guess the plan in that solve was to solve the unsolved (top)layer so the last turn of the solve could be/be canceled with L'. The pseudo LL is a V-perm and two corners that need to be oriented.

edit: but I could be completely wrong...

 

[Radical Seal]

btw, I am asking about this stuff because I saw this on the yahoo forum

scramble:
> > R' B L2 D2 R B2 U' D' R2 L' D F' L R2 U R' U' F' L' B D2 R' U2 R' B'
> >
> > 2x2x3-block: z' y' U' r' U' R2 x'
> > Orient edges: U' y L F' R U' R' y'
> > Another square: R U R U2 R2
> > c/e-pair: U
> > 2nd c/e-pair: R' U2 R
> > 1x2x3 on LL: U2 R' U R U2 R' U' (this is the part where I have questions about)
> > ZBLL: z' U L' U' L R U2 L' U L U L' U R' (L-L') (how do you do zbll when there is a non-matching block in the U layer??)

 

[MiloD]

oh wow....it looks like i was right after all

you do realize this is all FMC stuff right?

 

[Radical Seal]

you do realize this is all FMC stuff right?

yea i know

but do you know how he solved it with zbll even though there was an unmatching block on the u layer?

 

[Johannes91]

you do realize this is all FMC stuff right?

Yeah, of course nobody uses pseudo-blocks or ZBLL in speedsolving. They would lose recognition time!

but do you know how he solved it with zbll even though there was an unmatching block on the u layer?

He is probably a genius.

 

[MiloD]

Do L on a solved cube, look at the top layer, that is the "goal" of the LL in the solve you posted. So now, the last move could be L' or be canceled with L', as was the case here. If you scramble another cube with the sequence you first posted and compare it to the cube you just did L on, you will see that if you wanted to make the top layers look the same you would have to swap UBL and UFR corners and UF and UL edges, also the UFL and UBL corners need to be rotated clockwise and counterclockwise respectively. There is a ZB case for this...it is (U L' U' L R U2 L' U L U L' U R' L). I hope this answers your question.

 

[Radical Seal]

you do realize this is all FMC stuff right?

Yeah, of course nobody uses pseudo-blocks or ZBLL in speedsolving. They would lose recognition time!

but do you know how he solved it with zbll even though there was an unmatching block on the u layer?

He is probably a genius.

Hey Johannes, wasn't it you who did that solve a while back on the yahoo forums??

 

[MiloD]

you do realize this is all FMC stuff right?

Yeah, of course nobody uses pseudo-blocks or ZBLL in speedsolving. They would lose recognition time!

I really hope I don't have to add caveats for ever exception just to avoid the sarcasm. I know you know this ZB case because it has a 2x2x1, I know you pseudo block in your speed solves on occasion, prefer not to, and sometimes can't help yourself, I know.

 

[Johannes91]

Hey Johannes, wasn't it you who did that solve a while back on the yahoo forums??

Yes.

you do realize this is all FMC stuff right?

Yeah, of course nobody uses pseudo-blocks or ZBLL in speedsolving. They would lose recognition time!

I really hope I don't have to add caveats for ever exception just to avoid the sarcasm.

It's just that this was about a speedsolve, so it sounded weird that you said that.