Special Yau last 2/3 dedges algorithms

Discussion in 'General Speedcubing Discussion' started by Robert-Y, Sep 1, 2012.

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  1. Robert-Y

    Robert-Y Super Moderator Staff Member

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    Whenever my buffer is solved and I still need to pair up some edges, I don't insert a broken dedge in place of the buffer. I tend to just solve the rest of the edges in one go. If there are 4 dedges left, then I would solve 1 of the edges with a simple 3 edge cycle then solve the rest using one of the algs below.

    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]
    2R' F R' F' R U' R U r​
    x' R U' R2' F R 2U' R U R' F R' F' R 2U x x' 2R2 D2 2R' U2 2R D2 2R' U2 2R' x​
    2R U2 2R D 2R' U2 2R D' 2R2' x' R' F R 2U' R U R' F R' F' R 2U U' x​
    2R2 D 2R' U2 2R D' 2R' U2 2R' (U2) x' R U' R' 2U' R U R' F R' F' R 2U x​
    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]
    R U' R' U 2L' U R U' R' 2L R U2 2R D 2R' U2 2R D' 2R' R'​
    (U) B 3R' U' l' U' R U r x' 2R2 D2 2R' U' 2R D2 2R' U 2R' x​
    2L' R U R' U' 2L​
    2R' U' R U r​
    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]
    R U' R' U r U R U' 2R' R 2R D 2R' U2 2R D' 2R' R'​
    (U') 3R U 2R' R U R' U' 2R U' 3R' x' 2R U' 2R D2 2R' U 2R D2 2R2' x 2R U 2R' F' 2R U 2R' U' 2R' F 2R2 U' 2R'​
    2R U R' U' r'​
    2L R' U' R U 2L'​
    Enjoy.

    If you're having trouble learning these algorithms, try doing some of the algorithms on a 333 using normal turns in place of wide turns e.g. x' Rw U' Rw D2 Rw' U Rw D2 Rw2' x becomes x' R U' R D2 R' U R D2 R2' x

    @Faz: It's not too late to learn these ;)
     
    Last edited: Jan 21, 2017
  2. sa11297

    sa11297 Member

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    thanks a tone for these, now I can avoid bad cases that ruin some of my solves! :)
     
  3. Selkie

    Selkie Premium Member

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    Oh, very nice Rob, thanks for posting these (albeit my late reply :) )
     
  4. Dacuba

    Dacuba Member

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    Germany
    You are one of the most helpful people aorund there. Thank you for these :)
     
  5. Robert-Y

    Robert-Y Super Moderator Staff Member

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    No problem! Fortunately, these algs were very easy to find after a little bit of thinking. The hardest part was probably generating the images. You can click on the images to see how much I had to type in to get the desired LL image :p
     
  6. CubeorCubes

    CubeorCubes Member

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    This is iff topic but how do u do the last 8 edges when u yau 5x5? Thanks :)
     
  7. ottozing

    ottozing Platinum Member

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    These look pretty cool, but I doubt I'll learn them simply because I use E-slice pairing and I don't like the idea of doing z rotation-algorithm-z' rotation because it might mess up my flow.
     
  8. Robert-Y

    Robert-Y Super Moderator Staff Member

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    @Cubeorcubes: I haven't found a decent way to do that yet...

    @ottozing: Well you don't have to do z, you could do y...
     
  9. deadalnix

    deadalnix Member

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  10. deadalnix

    deadalnix Member

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    x' Rw U' Rw D2 Rw' U Rw D2 Rw2' x

    Can be replaced by

    RwURw'U'Rw'FRw2U'Rw'U'RwURw'F' (modified T perm)

    or

    RwURw'F'RwURw'U'Rw'FRw2U'Rw' (modified J perm) (I use that one)
     
  11. Robert-Y

    Robert-Y Super Moderator Staff Member

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    Bump...

    I've added some more algorithms. The new algorithms are shorter and much easier to learn. I just experimented a little bit to find them. I'm sure you can easily understand how they work, so I wont explain, unless you want me to :p

    Happy learning :)
     
  12. EMI

    EMI Member

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    Any tips on recognizing the 3-edges-cases?
     
  13. Robert-Y

    Robert-Y Super Moderator Staff Member

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    Yep... What I do for the cases with 3 dedges is:

    1. Rotate the top layer so that the solved edge is on the left.
    2. Look at the UF dedge and locate their partners
    3. Now you should be able to recognise which case you have.
     
  14. EMI

    EMI Member

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    Thanks!
     
  15. Robert-Y

    Robert-Y Super Moderator Staff Member

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    I made a small correction for the 6th case in the table, now there's a new algorithm. If anyone finds any mistakes or better algorithms, please let me know.
     
  16. mcw0805

    mcw0805 Member

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    Jun 29, 2014
    When you have 4 dedges remaining that are like those in the very first figuration (one going horizontal and one going vertical, both in the top layer), you can solve it by doing a Y perm with Rw moves.

    F Rw U' Rw' U' Rw U Rw' F' Rw U Rw' U' Rw' F Rw F'

    I thought it was pretty useful and less awkward than doing the edge flip twice.
     
  17. ~Adam~

    ~Adam~ Member

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    Please bug me at UKC to learn dis before next comp. Thanks.
     
  18. Ulico

    Ulico Member

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    Can someone please upload the table as a PDF or something? For some reason my computer just doesn't want me to see the images. Thanks!
     

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