Strategy on edges

[eo]

Could some one kindly suggest an optimized strategy for solving the 12 edges only?

I tried these:

* cross, 3 middle layer edges, 3 top edges, last 2 edges (key hole)
* ZZ's eo, cross, middle edges, permute top layer 4 edges
* middle edges, DL+DR, then borrow Roux method L6E

I didn't do well with last one, since I simply lost the clue during the process(easy to orient, but hard to finish in normal way without the corner pieces on position...)

any help please?.

 

[5BLD]

E slice, then separate and permute.

Kinda like belt method. You can do EO first if you like but you'd only be restricting yourself.

 

[Kirjava]

solve 8 edges -> ELL

 

[eo]

Thanks for help!

... but U/D edges may mixed together in each layer right? how to separate them? (except I should read the steps as: E slice while spliting the U and D edges...)

 

[5BLD]

Thanks for help!

... but U/D edges may mixed together in each layer right? how to separate them? (except I should read the steps as: E slice while spliting the U and D edges...)

Yes, I meant separation, it skipped my mind, I edited my post straight after. However sometimes it's faster not to.
I think it's best not to stick to a straight strategy. Like you may prefer to solve D edges at the same time as E slice, as Kirjava said, as you can finish with straight ELL. Depends on what you see in the scramble.

 

[eo]

solve 8 edges -> ELL

Got it. looks ELL once or twice is the best way to go...

How do you see the Roux L6E? May I have your opinion on how it worth here in this scenario?

 

[Kirjava]

hah. 6 edges -> LSE would also be pretty good. didn't think of that.

 

[eo]

...I think it's best not to stick to a straight strategy... Depends on what you see in the scramble.

Yes. looks anything before LL is best handled by brain rather than algs... thanks again.

since it's about 2 turns per edge, am I safe to predict that most cubers here could do it (12 edges, ~24 turns) in 5 secs?

 

[5BLD]

Yes. looks anything before LL is best handled by brain rather than algs... thanks again.

since it's about 2 turns per edge, am I safe to predict that most cubers here could do it (12 edges, ~24 turns) in 5 secs?

Not sure about your movecount, but I'm sure most will find sub6 edges fairly easy.

 

[eo]

hah. 6 edges -> LSE would also be pretty good. didn't think of that.

ya, I guess so. However, like i said before, some how I kept lost in the middle. I guess it's caused by placing the "UL+UR" pair... just don't know how to get them right without the corners' help... it tends to end up in weired cases for the M slice...

 

[5BLD]

you're just not used to the extra freedom

 

[Schmidt]

Without the corners it should be easier; then they just have to be across from each other(and a U/U' turn to match the side colors) before L6E

 

[eo]

you're just not used to the extra freedom

that's right I think...

will pay more attention when do the UL+UR turns... it feels not like "recognize the case" afterwards, but rather "make the case" for the M slice now...

 

[eo]

Without the corners it should be easier; then they just have to be across from each other(and a U/U' turn to match the side colors) before L6E

Yes, the DL+DR is quite simple. But I got troubled later with UL+UR. like 5BLD said, sometimes even a freedom brings confusion...

 

[Schmidt]

Try doing it CN. Might be a good exercise ( or a good reason to throw your cube across the room)

 

[eo]

Try doing it CN...

hmm, in fact, it's not that hard to do it color neutrally...

however, to me, it's really hard to choose at first glance the most optimized color as base...

 

[Stefan]

am I safe to predict that most cubers here could do it (12 edges, ~24 turns) in 5 secs?

I'm sure most will find sub6 edges fairly easy.

Either I severely underestimate people or you two severely overestimate them.

 

[Kirjava]

R' U' r U2 r' U R y' R2 U' R2

 

[eo]

R' U' r U2 r' U R y' R2 U' R2

...is this used for swap one pair of opposite edges on U layer?

sometime I uses this sequence: M2U M2U' (E2M')2