Reviewing

Hey everyone,

I started reviewing my ZBF2L and ZBLL today.  I had only gone fuzzy on
3-4 T-case ZBLL algs and about half of the U algs.  Also I still have
5-10 ZBF2L that I'm fuzzy on, but it feels good to know I haven't
forgotten much after this long hiatus.

Also, in response to Mike's question about ZBF2L, I talked to Lars V
about that, and we think that if it uses too many extra moves it would
prolong F2L too much, since ZBF2L is slower than F2L anyway, and it's
really worth it.  Also a lot of the all edges incorrect ZBF2L cases
are actually really, really nice.

Sometimes on the third pair I'll do partial edge control to orient
edges, and you can also do this to flip edges, and get an all edges
incorrect case.

So yeah I think partial edge control is a good idea for the 3rd pair,
but otherwise that extends the F2L move count alot and you lose time,
even with an RU finish for ZBF2L.

Just my $0.02 though,
Chris

 

Re: ZBF2L idea

Hi Mike,

Yes, this has been thought about a little before I'm sure. It's 
quite possible to orient edges during the 3rd or even 2nd pair, but 
therein lie a couple of problems (at least problems I haven't worked 
out a strategy for yet!)

Firstly, because when coming to the 3rd pair, you have 2 unsolved 
pairs, it's quite difficult to spot exactly the orientation of the 
edges, and which edges if any need to be affected. Sometimes it's 
can look like you have no good edges, and so you might insert a pair 
R' F R F', but the situation was such that it didn't really help 
matters, because you may have flipped one edge while unflipping 
another. 

Also, if you try to flip edges during the 2nd pair, it gets 
increasingly hard to make sure to not undo in the 3rd pair what you 
have made good in the 2nd pair :)

I would love to hear ideas on this.

Dan :)

--- In zbmethod <at> yahoogroups.com, Mike Bennett <mikeisadumbname <at> ...> 
wrote:
>
> There are 306 cases for the ZBF2L.
> 
> What if we could try orienting the edges early?
> 

Petrus?