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Assorted Fingertricks for F2L "Stoplight" Case

teller

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One of these turns up almost every solve. Here is not an exhaustive list, but it shows several different approaches to the case:

Stoplight 1 Standard.gif


M U' R' F R U M'

Stoplight 2 Alternate.gif


R B L U' L' B' R'

Stoplight 3.gif


M' U R U' r' U' R U R'

Stoplight 4 BL.gif


r U R B' R' U' r'

Stoplight 7 Stuck FR.gif


R U' R' r U' r' U2 r U r'

Stoplight 8 Stuck FL.gif


L' U L (F R U2' R' F')

Stoplight 11 Rotationless macro.gif


R' U2 M (U R U' R' U' r)

hr.gif


* Music used with kind permission from Devin Townsend
Album: Ghost
Track: Blackberry
URL: http://www.hevydevy.com/music/ghost/
Copyright © 2011 HevyDevy Records
 
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peterbone

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Yeah, I do most of those. Although for the 5th one why not just do the mirror of the 6th and save 2 turns?
Also, if you have algs that aren't on the F2L wiki page, can you add them? Thanks.
 
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teller

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Wow, amazing. I really like your videos Teller. Must try when I get home from work.

Thanks! Interesting blog you've got there...I looked at your F2L permutation diagrams but I couldn't quite follow them. I like the idea though--promoting "know-ahead" over "look-ahead."

not specifically a "finger trick". but i sometimes prefer this completely 2gen (R,U-gen) algo:
R' U2 R' U R' U' R U2 R
That's pretty neat. Watching what it does gives me a headache--the whole right side comes out, cross piece and all! Waaaah!!!

For the second case, I do

y' R' U R U2 y R U R'
Two cube rotations for one case, very expensive!

Here are a couple of interesting outtakes:

Stoplight%205%20Shoot%20to%20BR.gif


F (R U R' U') S R' f'

Stoplight%209%20Stuck%20LF.gif


F2 (R U R' U') F' U F'

I didn't shoot these because I don't use them. I mean, I started using them, but they didn't stick. I like the sexy move in there, and I had high hopes for the S turn, but it's just in a bad spot. Unfinished cases...
 

Thorsten

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I never learned Algorithms for F2l, but these "stoplight" cases are my worst cases, because i need at least one cube rotation and many moves to put them in.
So i will learn these algorithms, thanks!
 
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