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The FMC thread

Discussion in 'General Speedcubing Discussion' started by blah, Jul 12, 2009.

  1. theos

    theos Member

    Aug 28, 2016
    Durban, South Africa
    Nice one - keep it up!

    With your start I can get a slightly shorter skeleton (with the same number of unsolved corners) but the insertions are actually worse.

    Scramble: F L' R' F2 U2 L' F D2 R' U2 B' D F' B L U' D B' U2 F'

    F B R2 D R' U2 @ R2 U' // XCross given [8/8]
    B' L D B L' // F2L-1 given [5/13]
    R' * B R B2 D' B D2 // AB4C [7/20]
    Insert at *: R' F' R B R' F R B' // 1 corner, from IF [4/24]
    Insert at @: D' L2 D R2 D' L2 D R2 // last 3 corners, from IF [6/30]

    Solution: F B R2 D R' U2 D' L2 D R2 D' L2 D U' B' L D B L' R2 F' R B R' F R2 B2 D' B D2 (30 moves)
    cubeshepherd likes this.
  2. cubeshepherd

    cubeshepherd Member

    Feb 18, 2018
    Thank you @theos for looking at this and for the different solution. I really like to see others opinions when it comes to FMC and it helps me think about different things and to also pay attention to different things next time or just in general for the future. Thank you again for your solution.
  3. SpeedCubeReview

    SpeedCubeReview Member

    May 25, 2014
    Holly, MI
    What does the AB mean in AB4C?
  4. cubeshepherd

    cubeshepherd Member

    Feb 18, 2018
    "All but" so when you see AB3C it is just a short way of saying "All But 3 Corners are solved".
  5. theos

    theos Member

    Aug 28, 2016
    Durban, South Africa
    Really nice scramble I got in practice:
    R' U' F B U2 L2 B F2 R2 D2 F R2 U R B' F' D2 L2 D L F2 U R' U' F

    Lots of potential from the start and everything seemed to work out so neatly to end with a 3 corner skeleton.
    pseudo-2x2x2: L' F R2 B [4/4]
    pseudo-2x2x3: (B' L D' L) [4/8]
    2x2x3+EO: F' L [2/10]
    F2L-1: F * D2 F2 [3/13]
    AB3C: F D2 F' D F D' F' [6/19]
    Insert corners at *: F' D2 F U F' D2 F U' [6/25]

    Solution: L' F R2 B F' L D2 F U F' D2 F U' D2 F' D2 F' D F D' F' L' D L' B (25 moves)
  6. asacuber

    asacuber Member

    Nov 4, 2015
    Tarnby cube traef scramble 2 seems to have something good. Everyone is getting pbs and best solves on it
    cubeshepherd likes this.
  7. cubeshepherd

    cubeshepherd Member

    Feb 18, 2018
    I agree, and I hope/think it would be nice to see the scramble, if someone is able to post it in a few day.
  8. arquillian

    arquillian Member

    Dec 19, 2015
    The internet
    I'm one of the people who got a PB on the second scramble at Tarnby, so here:
    Scramble: R' U' F R2 D B2 D L2 F2 U' L2 R2 U L' B D' U F D B2 F2 D R' U' F
    Inv Scr: F' U R D' F2 B2 D' F' U' D B' L U' R2 L2 U F2 L2 D' B2 D' R2 F' U R
    On inverse:
    L' F L B //2x2x1 4/4
    R D R D2 L D //2x2x3 6/10
    U2 R U2 R' U' //F2L-1 5/15
    F' R' F R2 U' R' U F' //A3C 8/23

    Skeleton (23): F U' R U R2 F' R F U R U2 R' U2 * D' L' D2 R' D' R' B' L' F' L
    Insert at *: L' U L D' L' U' L D - 4 moves cancelled (IF says this is optimal)

    Final solution (27): F U' R U R2 F' R F U R U2 R' U2 L' U L D' L' U' D2 R' D' R' B' L' F' L
    This was the fourth best solution on this scramble, after Jakob (23) and the Egdal brothers (both 26).

    I tied my official PB on the first attempt with a 39. This beat that by 12 moves. I don't really do FMC, was kinda speechless. Sadly, I DNFed the mean (only needed to sub 67 to beat official PB mean) because I'm an idiot who doesn't understand NISS properly.
    Last edited: Jul 3, 2018
    cubeshepherd likes this.
  9. Sue Doenim

    Sue Doenim Member

    Nov 9, 2016
    This past weekly competition (week 24), I was pretty happy with my FMC attempt. I got a 31, and got my first podium, 3rd, on anything in the weekly competitions. The only part of the solve where I was a bit disappointed was in my insertion. Checking insertion finder, it showed better results, but with weird commutators I don't quite understand. Can anyone help explain them to me?
    Scramble: R' U' F D2 L' F L' B' L' D2 B2 U L2 F U2 B2 R2 F U2 B U2 B2 R' U' F

    My insertion was only three edges, but for the sake of brevity, I'll use the one skeleton and show all three insertions solving the same case in it.

    Skeleton: B' U F' D2 B' L' D L' R D' L (1) D R' (2) D L D' B2 (3) R' (4) B U R2 F

    1 (mine):
    B' U2 D2 F D' F' U2 D2 B D
    Cancels 1
    Simple commutator, [B E2 B', D']

    R D R' B' L' F' D' F L B
    Cancels 3
    I think this is just a non-commutator 3-cycle, so I'm not mad I missed it.

    F' B U' R' U F B' R' D R
    Cancels 3
    This one I don't get. It boils down to [S, R' D' R], but i just can't make sense of it. I don't see the insert/interchange I recognize commutators by. Logically, S seems to be the interchange, and R' D' R the insert, but they "cross axes," as best as I can explain it.

    R F' B U' R' U F B' R' D
    Cancels 3
    This one is the same sort of thing, only this time it's [R: S, R' D' R], which, now that I think of it, is just the exact same thing as the last one.

    Mostly I just want an explanation of the third one, I guess.
  10. FastCubeMaster

    FastCubeMaster Member

    Jun 30, 2015
    Brisbane, Australia
    Any ideas for continuing from:

    Scramble: R' U' F L2 D' U2 F2 L2 D B2 L2 U2 F2 L2 B R2 F L' U2 L2 R' B' U2 B2 R' U' F

    L2 D R2 F' L2 R' B' R B2 R D' R' D R' B D B2 //F2L-1 (17 moves)

    Getting started in FMC (because of mental breakdown comp) and couldn't continue that scramble very well.
    Last edited: Jun 19, 2018
  11. x2 y2 F R U R' U' F' y2 U2 F' U F

    That leaves 3 twisted corners, and you could insert 2 comms for that for a total of 33 moves (via insertion finder).

    TBH, 17 to F2L-1 isn't great, especially since you don't have full EO, so I would try to find a better start.
    FastCubeMaster likes this.
  12. porkynator

    porkynator Member

    Oct 27, 2010
    Belluno, Italy
    My 25 from Veenendaal Open 2018

    Scramble (inverse solution): B D2 R' L F L' D2 F' R' F L F' R F D2 L D2 L F2 L2 R2 U' R' L' U

    B D2 R' L F //EO + square (5/5)
    D2 L F2 //Line + another square (3/8)
    L2 R2 U' R' //Pseudo F2L (4/12)

    From here I have first switched to normal and got this backup 27:

    L U' L' U2 L //F2L (5/17)
    R2 D' L F2 L' D R U2 R U //LL (10/27)

    But there are many possibilities. For example (on inverse):

    L' U' //All but 2 edges and 4 corners (2/14)

    But I didn't like this one.

    * L' //3E5C (1/13)

    was better. With

    * = B' U' R U2 L' U L U2 R' B //Pair 3-cycle (10/23)

    I got to 3 corners in 23, but there was no good insertion (even if so, I had little chances of doing better than 27).

    In the end I have found this:

    L' U //4E4C (2/14)

    Skeleton: B D2 R' L F * D2 L F2 L2 R2 U' R' L' U

    * = L' D2 + L D2 L //Conjugate and solve edges (leave 3C) (5/19)
    + = F' R' F L F' R F L' //(6/25)

    You can also see the inserted part as a whole as a "conjugate and solve":

    * = [L' D2 F' R' F, L] = L' D2 F' R' F L F' R F D2 L
  13. guysensei1

    guysensei1 Member

    Nov 24, 2013
    Singing pores
    Building blocks incompatible with your EO isn't always bad...

    R' U' F R L2 U' R2 B2 D2 F2 U2 F2 U F2 B L2 B2 U B D' R D' F R' U' F

    F U2 D' R//EO (4/4)
    (L2 D)//2x2x2 (2/6)
    B' R2 B2 U2 B U' B2 U//F2L on the wrong axis (8/14)
    F2 U2 B U B' U2 F U' F//LL (9/23)
  14. alexela

    alexela Member

    Jan 29, 2016
    FMC, method ROUX (Week 182): 22 STM (26 HTM)
    B' L2 B2 D L2 R2 U R2 U B2 L2 U' L' D B U2 L U2 F2 L2 D2

    y' z //Inspection
    u' S2 //Pseudo FB (2/2)
    M2 U' r2 //Pseudo SS (3/5)
    U2 M2 U //Pseudo SB (3/8)
    R2 U B U' B' R' //NMCLL (6/14)
    U M' U //EO+LR (3/17)
    R2 U2 l2 U2 R //The Rest of the Cube (5/22)

    Solution: F' U2 D2 R2 L2 B' L2 F2 R2 L2 B R2 B D B' D' R' B R' L U R2 U2 R2 D2 R (26 moves)
    Last edited: Jul 1, 2018
  15. SpartanSailor

    SpartanSailor Member

    May 21, 2016
    During fewest moves event... can you manipulate the cube to test your solution or to try our move sequences?
  16. Duncan Bannon

    Duncan Bannon Member

    Sep 9, 2017
    @SpartanSailor If I understand you right, that is completely legal.
    Last edited by a moderator: Jul 2, 2018
    SpartanSailor likes this.
  17. DGCubes

    DGCubes Member

    Feb 14, 2014
    Over there
    Yes, you can. You are allowed to bring 3 cubes, and you can do just about whatever you want with them for the full hour. The relevant section of the regulations is Article E.
    SpartanSailor likes this.
  18. solutions from my 26.67 mean at Maryland 2018 yesterday
    scrambles (generated with cube explorer):
    1. U' B2 L' D R2 U' B' U2 R' F' D' L' F2 B2 U D2 F2 U' D2 F2
    2. U L' F' D2 R L' U B2 D L F B2 L2 U2 D2 F2 B U2 F L2
    3. F R F D2 B2 L B L2 D R L D2 L' F2 R' U2 B2 L2 F2 R2

    F' (R U L2 F) // EO
    (B2 L D' R') // 2x2x2
    U' R U' R' U L' U L // good 6c
    skeleton: F' U' R U' R' U L' U L R D L' B2 F' * L2 U' R'
    *: F ^ R F' L' F R' F' L (cancels 3)
    ^: B R F' R' B' R F R' (cancels 5 lmoa)
    final solution: F' U' R U' R' U L' U L R D L' B' R F' R' B' R L' F R' F' L' U' R' (25)

    U' L2 U2 L // EO+square
    (U' R2 U2 F U2 B2) // 2x2x3
    (B D' B' L2 D2 L2) // bad 6c
    at this point I tried to find a comm that canceled 6-8 moves and reduced the skeleton to 4/5c and found this:
    skeleton: U' L2 U2 L' D2 L2 B D B * U2 F' U2 R2 U
    *: B' D' B U2 B' D B U2 (cancels 7, 15 to 5c)
    5c skeleton (here come the shitty insertions): U' L2 U2 L' D2 L2 B2 U2 ^ B' * D B F' U2 R2 U
    *: B R B' L2 B R' B' L2 (cancels 2)
    ^: U' B U F2 U' B' U F2 (cancels 1)
    final solution: U' L2 U2 L' D2 L2 B2 U B U F2 U' B' U F2 R B' L2 B R' B' L2 D B F' U2 R2 U (28)
    optimal for this skeleton was 27, 1 cancel nesting a 3 cancel

    (U2 F2 D2 B) // EO
    (D2 U R') // 2x2x2
    (F2 L2 D L) // 2x2x3
    (F2 L D L' D' R' D R D R' D' R) // L3C
    (R' D L2 D' R D L2 D') // comm, cancels 4
    final solution: D L2 D' R' D L2 R D' R' D' R D L D' L' F2 L' D' L2 F2 R U' D2 B' D2 F2 U2 (27)

    Ryan DeLine's 24:
    D F2 D' F2 D // 2x2x2
    U * R B2 U B // 6e3c (lol)
    *: U' R B2 U // solve stuff
    B' D' R' D R B R2 // L3C in 18 (more lol)
    insertion cancels 2
    DGCubes likes this.
  19. Neuro

    Neuro Member

    Dec 23, 2016
    So I got this scramble and was able to get to EO2x2x3 pretty easily but I’m not entirely sure how to end the solve. Suggestions?

    B’ F D2 U2 L2 F’ U2 F U’ B R U’ L’ R’ B’ U2 B2 D’ B

    R’ B2 D’ L’ D’ R2 U’ L2 U2 L’

    I did find L5C redux in 5 moves but I don’t really like L5C lol

    B2 U B2 U B’
  20. SpartanSailor

    SpartanSailor Member

    May 21, 2016
    So you are permitted to test your solution or move count by manipulating one of the 3 self-supplied cubes.

    Interesting. Thanks!

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