Petrus Last layer

[Lotsofsloths]

How does Lars do his Petrus method last layer?(not the fridrich system)

 

[watermelon]

http://lar5.com/cube/index.html

1. Permute corners
2. Orient corners
3. Permute edges

 

[MiloD]

Lars uses COLL but mostly constructed from his own algs (eves, denzels, sunes and niklas's to name a few)He says hes working on a system for every ZBLL alg as combinations of 40 algs. this sounds very interesting.

 

[alexc]

He says hes working on a system for every ZBLL alg as combinations of 40 algs. this sounds very interesting.

So, you just combine the algs in different ways to achieve every ZB case?! That would be awesome if he could do that! However, since you only have 40 sequences to work with, couldn't the move count be higher than regular ZB for some cases?

 

[MiloD]

it is higher by 2-3 moves. but he thinks you can make up for it bc it is easier to keep only 40 algs up to competition speed.

 

[watermelon]

Sounds similar to Simple OLL. anyway, if someone wants to tell me the 40 algs he's using, I'd be happy to make a "Simple ZBLL" sheet .

 

[MiloD]

http://lar5.com/cube/270/index.html at the bottom

they are all on there actually. you can click on the shapes on the top

 

[watermelon]

Awesome. It's a shame he didn't include mirrors (did he include inverses?). As for the effectiveness of those alg-combinations, 2-3 moves sounds like a fairly nice compromise for 230 less algs...

 

[Johannes91]

It's a shame he didn't include mirrors

It's a shame that most cubers are memorizing 2-4 times as many algs as needed.

 

[Lotsofsloths]

So...long answer short: COLL?

 

[AvGalen]

And permute edges after COLL!

Lars told me at the WC2007 that he actually wanted a method that would:
* Not require a lot of moves
* Would only use RU moves for the biggest part of the puzzle.

I don't think many people think of the Petrus method as a "block + almost 2-gen solution" though. (and they are correct because COLL is not 2-gen. Lars couldn't get that final part figured out)

When people talk about the Petrus method now, they mostly refer to the 2x2x2 -> 2x2x3 -> F2L + LL Edges, not the rest of the last layer

 

[Lotsofsloths]

true..
so COLL?

 

[alexc]

Does Lar's say which algs to combine for each of the 270 cases?

 

[MiloD]

yeah check the link i posted before and click the shapes on top.

 

[AvGalen]

true..
so COLL?

yes, COLL indeed

 

[Lotsofsloths]

Oh ok, guess that sounds reasonable, since you already have edges oriented with petrus f2l..