The FMC thread

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

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  1. Cubenovice

    Cubenovice Forever Slow

    Thanks for your thoughts.

    Well I did not seriously consider messing up EO in a ZZ solve.
    But decided to post this because I stumbled over the last pair and in fiddling around found this funny "end". I didn't kow if there could be an "easy" fix.
    Something like a comm or cycle that flips the cubies and could be inserted somewhere during the solve.
     
  2. Tim Reynolds

    Tim Reynolds Premium Member

    995
    34
    Jun 28, 2006
    Boston, MA
    WCA:
    2005REYN01
    YouTube:
    timbreynolds
    Fair, but if it gives something interesting, then it's not a pointless exercise. Just like how Anthony Brooks' nationals solve, solving the first cross and then switching F2Ls is pointless, except that it worked really well. If you're trying ZZ, and you get to the last pair, why wouldn't you just try everything?

    Then again, that's why I don't like methods like Petrus or ZZ for FMC--working to preserve orientation in the first place doesn't seem that good of an idea to me.
     
  3. Cride5

    Cride5 Premium Member

    1,225
    16
    Jan 27, 2009
    Scotland
    WCA:
    2009RIDE01
    Yup, I rarely do EO at the beginning of an FM solve, unless there are absolutely no blockbuilding starts, either on scramble or its inverse. This for example:
    http://www.speedsolving.com/forum/showpost.php?p=431891&postcount=376

    Much better is to think about EO during the blockbuilding, so that it is largely solved when you get to the last slot. If I can get at least 3x LL edges oriented, and one pair by the time I reach F2L-1, I'm happy.
     
  4. Cubenovice

    Cubenovice Forever Slow

    Why I am using ZZ for FMC:

    I have done only three FMC attempts up till now and have found that I really suck at block building and then even more in continueing into a proper LL.

    Practicing ZZ builds already some experience with blockbuilding, results in oriented LL edges and should have an overall lower movecount vs CFOP.

    I have tried making some 2x2x3 blocks without EO beforehand but then LL completely messes me up.

    I consider ZZ as a sort of transit station on my way to becoming a multi-methodist but there is so much to learn and so little time to study...
     
  5. Stini

    Stini Member

    150
    0
    Jul 21, 2008
    Finland
    WCA:
    2007TIIN01
    YouTube:
    teemutiinanen
    I made two sub-30s this weekend at Finnish Open. Here are the scrambles and the solutions:

    Scramble: R2 U' L2 U R2 D R2 U B2 U R2 U2 L' B R2 B R B2 U' F L
    Solution: L2 B L' R2 B' L D' F' L' F' L' D2 L' D' L2 D L' D' L D L2 B' L2 B L B' L B D2 (29 HTM)

    Pre-move D2

    2x2x2: L2 B L' R2 B'
    2x2x3+EO: L D' F' L' F'
    F2L minus slot: L' D2
    F2L: L' D' L2 D L' D' L D
    LL: L2 B' L2 B L B' L B

    Scramble: L B2 D2 F2 L U2 L' R F2 D' L2 R D' U R2 B2 R B D R F'
    (Inverse scramble: F R' D' B' R' B2 R2 U' D R' L2 D F2 R' L U2 L' F2 D2 B2 L')

    Solution: R2 U2 L' D' F' B2 U' B' D2 B U B' D B2 F' U2 R U' R' U2 F2 R U' R' F U' D (27 HTM)

    Pre-move D

    2x2x3: R2 U2 L' D' F' B. D' B2

    Now I switched to the inverse scramble (pre-moves B2 D B' F D L U2 R2)

    Pseudo-F2L minus slot: D' U F' R U R' F2
    Leave 3 corners: U2 R U R' U2 F

    Insert B U' B' D2 B U B' D2 at the dot to cancel 3 moves.

    I think I'm now the only person with more than two official sub-30 solves. :)
     
  6. DavidWoner

    DavidWoner The Punchmaster

    3,936
    3
    May 7, 2008
    Kansas City, MO, USA
    WCA:
    2008WONE01
    YouTube:
    vault312
    I hope I don't have to wait another year to make this not true anymore >:[
     
  7. Ville Seppänen

    Ville Seppänen Member

    552
    0
    Jan 27, 2008
    Finland
    WCA:
    2008SEPP01
    YouTube:
    Spef5
    btw this is joey.

    Solution (37)

    2x2x2: R' U2 D' L2 D
    2x2x3+cross: U2 R U' R U2 B' R
    F2L + LL: y U2 R' [F B' R2 F' B] U R U2 F' U' F y R U' R' U2 F' U' F U' F' U F U2

    I get bored easily. [] was an insertion.
     
  8. deepSubDiver

    deepSubDiver Member

    161
    0
    Jun 17, 2009
    Germany
    From a weekly competition in a German board. Was actually just playing around with phasing and forced a LL skip ;)
    For the second step, I am currently compiling a list of algorithms.

    Code:
    scramble: B' F' R2 B' L2 R2 F' L B' F L D R' B' U2 L2 B U
    
    223    (8/8)     x2 B2 F' D' F U2 B2 R L y
    eo+cp  (5/13)    R U B' R B
    f2l    (14/27)   U R2 U2 R U R U R' U R2 U R U2 R2
    
    F2 B' U' B D2 F2 R L F D L' F L D F2 D2 F D F D F' D F2 D F D2 F2
    
    
    Code:
    
    
     
  9. guusrs

    guusrs Member

    670
    0
    Aug 4, 2007
    Netherlands
    WCA:
    1982RAZO01
    Wooow, great! Congratz! Yes you are that only person at this moment!
    I'll try the scrambles.......

    Gus
     
  10. guusrs

    guusrs Member

    670
    0
    Aug 4, 2007
    Netherlands
    WCA:
    1982RAZO01

    Noop, no better insertions possible!
    Are you sure there are no other options after your splendid 10 moves start?
    Gus
     
  11. okayama

    okayama Member

    519
    8
    May 9, 2010
    Hiroshima, Japan
    WCA:
    2009OKAY01
    YouTube:
    okayamat
    There might be a better way to continue, but that was the best I could do in 1-hour.

    I surprised to realize that any 8-move insertion was not applicable in this frame, so just wanted to make sure whether that was really impossible. Thanks, Guus.

    And congrats Teemu on remarkable records!
     
  12. Tim Major

    Tim Major Platinum Member

    5,376
    4
    Aug 26, 2009
    Melbourne, Australia
    WCA:
    2010MAJO01
    Wow....

    B2 D2 F B2 R2 L' D' R F U2 R B2 D B' D' B' R' B' F2 U2 R' F B R B

    y' D B2 R' y' U' R F R2 U2 R2 U2 R U' L' U' L (15)

    Now what :(
    Couldn't find anything decent.
    If you do y F R U R' U' R F r U R' U' r'
    You get a U-perm, but I couldn't find any insertions.
    15 f2l is O_O for me :)
    Didn't take long to find that either. Any "pro" FMCers wanna have a go at sub 25? (maybe that's a bit too crazy for this start :p)
    I am loving the 3 move block with free pairs xD
    After that start, I didn't bother with premoves and whatnot. Didn't see much good with reverse scramble. I suppose NISS wouldn't be useful here? I don't really know how to use NISS so I wouldn't've found anything ^.^
    Have to go, so can't check my solution or w/e.
     
  13. okayama

    okayama Member

    519
    8
    May 9, 2010
    Hiroshima, Japan
    WCA:
    2009OKAY01
    YouTube:
    okayamat
    Here is your solve, without cube-rotation:

    2x2x2 block: D R2 F'
    More 2x2x1 block: U' L B L2 U2
    F2L minus 1 slot: L2 * U2 L
    Finish F2L: U' R' U' R

    Very nice start. After the F2L, I found the following skeleton:

    Orient edges: R' F' U' F U R (well-known OLL)
    All but 3 corners: R' U2 R U R' U R U' (well-known OLL)

    Then insert L D2 L' U L D2 L' U' at * to solve the 3 corners.

    Final solution: D R2 F' U' L B L2 U2 L' D2 L' U L D2 L' U L U' R' U' F' U' F U' R U R' U R U' (30 HTM)

    In addition, Cube Explorer tells us the optimal way to finish after the F2L is as follows:

    More pairs: R U R'
    Orient edges: B' U' R' U R B (well-known OLL)
    Solve all: U2 R U2 R'

    Final solution: D R2 F' U' L B L2 U2 L2 U2 L U' R' U' R2 U R' B' U' R' U R B U2 R U2 R' (27 HTM)

    Maybe you can understand it.


    With modification of the start, I found the following 23-move solution in 15 minutes. :)

    Solution: D R2 F' U' R' U' L2 U R L2 B R' U' R2 B2 R' U' B' U' B2 U B U' (23 HTM)

    2x2x2 block: D R2 F' (the same start as yours)
    2x2x3 block: U2 L2 * U L2
    Orient edges: B R' U' R2 B2 R'
    F2L minus 1 slot: U2
    All but 3 corners: U B' U' B2 U B U'

    Insert at *: L2 U R' U' L2 U R U'

    (Thanks Per for letting me know my mistake, as stated below, I hope it is now fixed)
     
    Last edited: Sep 12, 2010
  14. mrCage

    mrCage Member

    654
    0
    Jun 17, 2006
    Sorry to be nitpicking. A start that leaves (a few) insertions should be called a skeleton and not a frame. Nevertheless i'm reallly impressed by your fewest moves skills Okayama. FM has come a long way since i first got into it (again) 4-5 yrs back.

    Per
     
    Last edited: Sep 3, 2010
  15. Sebastien

    Sebastien Premium Member

    796
    0
    Apr 22, 2008
    WCA:
    2008AURO01
    My second official 27 solution! :)

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

    Start with normal Scramble:

    Pseudo 2x2x3: R' D F' L R' B2 L' U2 L2 (9 moves)
    Extention to Pseudo-Triple-X-Cross: U' F2 L' U' L (5 moves)

    switch to inverse scramble:

    Cube minus corner 3-cycle: L2 F R' F R U F2 U' F (9 moves)

    Solution to corner-3-cycle: R' D F' L R' B2 L' U2 L2 U' F2 L' U' L F' U F2 U' . R' F' R F' L2 (23 moves)

    Insertion: . = U R' D' R U' R' D R (8 moves, 4 moves cancellation!)


    Final Solution: R' D F' L R' B2 L' U2 L2 U' F2 L' U' L F' U F2 R' D' R U' R' D F' R F' L2

    27 moves
     
  16. guusrs

    guusrs Member

    670
    0
    Aug 4, 2007
    Netherlands
    WCA:
    1982RAZO01
    Woooow, great, again 27 moves, and using NISS!
    Congratz!

    I will try the sramble soon....

    Gus
     
  17. guusrs

    guusrs Member

    670
    0
    Aug 4, 2007
    Netherlands
    WCA:
    1982RAZO01
    Hi Stini,
    I did 28 and 29 moves an these solves ;-)
    Gus
     
  18. okayama

    okayama Member

    519
    8
    May 9, 2010
    Hiroshima, Japan
    WCA:
    2009OKAY01
    YouTube:
    okayamat
    I also found a 28-move solution for the first one.

    Scramble: R2 U' L2 U R2 D R2 U B2 U R2 U2 L' B R2 B R B2 U' F L
    Solution: L' F' L' B' L F L' B2 L' R2 B' L D F' L F D2 F D2 R' D R D R' D' R D F (28 HTM)

    Pre-scramble: F

    2x2x2 block: L2 * B L' R2 B' (Same as Teemu's solution)
    2x2x3 block: L D L
    Orient edges: L' F' L
    F2L minus 1 slot: F D2 F
    More 2x2x1 block: D2 R' D R
    All but 3 corners: D R' D' R D
    Correction: F

    Insert at *: L F' L' B' L F L' B
     
  19. Ranzha

    Ranzha Friendly, Neighbourhoodly Staff Member

    Scramble: L2 U2 L2 D2 U R2 U' L2 B F L2 B' L' R2 D2 U L D' L' R

    Double x-cross: (y2) F' L' F R2 D' R' [6/6]
    F2L: (x2 y) R U R F' U' F U2 R' U' R [10/16]
    OLL: U' R' F R F' U R [7/23]
    PLL: (x) L' D L' U2 L D' L' U2 L2 [9/32]

    Whoa. This was a great solve.
    Took about 8 minutes.
     
  20. satya

    satya Member

    5
    0
    Oct 29, 2008
    pre moves+scramble:RUR'+U' D2 L R' F2 R B D' F' B2 U' D' F' R2 L2 F U B' D2 U' B' L F2 U R D' B F R' U'
    2x2x3:L F2 L' F' B2 (5/5)
    all corners:R2L'. D F' D'(12/17)
    insert sune at . to orient corners: F' R F' R 'F2 R F2
    this is a good start for me(first serious attempt at FMC),
    i could not find any good insertions to solve the remaining 5 edges
    or is this a good skeleton?
    please help.
     

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