[Help Thread] FMC Discussion

I all,

Here's the WC Bangkok 2011 scramble:

R2 F D2 L F' U2 F2 U' L' B' L F2 U2 L2 F2 R2 U B2 U2 R2 D2

What can you do with it?

@Mirek: look what I did for weekly competition 2011-41 (-;

Guus
 
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guusrs said:
I all,

Here's the WC Bangkok 2011 scramble:

R2 F D2 L F' U2 F2 U' L' B' L F2 U2 L2 F2 R2 U B2 U2 R2 D2

What you you do with it?

@Mirek: look what I did for weekly competition 2011-41 (-;

Guus
Click to expand...


Nice. You found 23 moves + corner 3-cycle. The same as I did but I had bad luck with insertions.

Look at my 24-move FMC #367 :-)
http://fmc.mustcube.net/results.php?round=367&format=classic&metric=htm

For the WC Bangkok 2011 scramble I have f2l in 17 moves so far.
U' L2 B' L R' B R2 D R' F R2 F U' B' F [F' B2]___(17) ?
 
@ Guus
I tried to continue your corners-first start, it was very difficult to find this 30 moves solution:
Scramble: D' F2 U' B2 U R2 U F2 D' B' U2 D R U2 B' U2 D' B2 L D F' D U' B2 D2 F2 B U2 R2 B'
My solution: BLR’FLU’D’BRB2U2BD’RL’FU2D’F’UD’L’DU’F2U’D’R2DU’
explanation:
B * U L B' F' D R your start,
insertion: M’
i wrote this without cube rotation:
BLR’FLU’D’BR 8 corners and 5 edges,
B2U2BD’RL’F more an edge, and the white/yellow centers reset,
U2D’F’UD’L’DU’F2U’D’R2DU’ L6E.
 
guusrs said:
I all,

Here's the WC Bangkok 2011 scramble:

R2 F D2 L F' U2 F2 U' L' B' L F2 U2 L2 F2 R2 U B2 U2 R2 D2
Click to expand...

Here is my attempt at the WC scramble:

L U' L D L' U L D F2 R2 U' R' F2 D F2 L' F' L D' B D B' L2 D L2 D' (26)

Argh! I could have been world champion!

This is my best 1-hour FM solve ever.

Explanation:
2x2x2: L2 . D2 F2 R2 U' R' (6/6)
Siamese 2x2x2's: F2 D F2 L' F' (5/11)
All but 3 corners: L (D' B D B') L2 (D L2 D') (9/20)
Insert at ".": L' U' L D L' U L D' (2 moves cancel)
 
Attila said:
@ Guus
I tried to continue your corners-first start, it was very difficult to find this 30 moves solution:
Scramble: D' F2 U' B2 U R2 U F2 D' B' U2 D R U2 B' U2 D' B2 L D F' D U' B2 D2 F2 B U2 R2 B'
My solution: BLR’FLU’D’BRB2U2BD’RL’FU2D’F’UD’L’DU’F2U’D’R2DU’
explanation:
B * U L B' F' D R your start,
insertion: M’
i wrote this without cube rotation:
BLR’FLU’D’BR 8 corners and 5 edges,
B2U2BD’RL’F more an edge, and the white/yellow centers reset,
U2D’F’UD’L’DU’F2U’D’R2DU’ L6E.
Click to expand...


I did not try, thinking it's hopeless. Maybe Gilles Roux could find something.
Then I asked Cube Explorer what the shortest solution (after your B U L B' F' D R D2) is and it is surprisingly an understandable one, without making any mess on the cube.
R' D B' R' D B R2 D2 R' U' L U B' R' D2 (15f)
 
My winning solution from WC2011:

Scramble: R2 F D2 L F' U2 F2 U' L' B' L F2 U2 L2 F2 R2 U B2 U2 R2 D2

After a few minutes I found the following block:

2x2x2: R2 U2 B2 U' R'
2x2x3: F' L' B D B'

I spent the next 20 minutes NISSing this and other beginnings I had found, then went back ooking to the block again and what what I had at first not seen:

3 corners+1 twisted: D R F2 R' D F' R F R' D'

with a setup before sledgehammer it gives a pure 3-cycle: D R F2 R' D L' F' R F R' L D'

The corners were placed rather bad going through my partial solution. At least I was able to cancel 2 moves at 2 spots:

3-cycle: R2 U2 B2 U' R' F' L' B D B' . D R F2 R' D L' F' R F R' : L D'

. = F2 D B D' F2 D B' D'
: = B2 L F L' B2 L F' L'

I randomly chose the second one.

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

28 moves


After all a very standard solution. I'm so happy that this was enough to win. :)
 
Congratulations!

You already had the most sub 30 solves so the title of World Champion is truly deserved.

Nice to see that the WC solution has a set up move for inserting the last pair to improve the LL.
I did the same thing (in my otherwise crap) solution for weekly 41 so now I can be proud by proxy ;)
 
I don't know much about FMC so this is probably a stupid question. Sebastien, your solution is longer than the scramble. Surely reversing the scramble would be shorter. I'm guessing you know what the scramble is since you must have to do it several times. Is there a rule against this? How would they know if you started with the reverse scramble and then changed it a bit?
 
Sébastien_Auroux said:
My winning solution from WC2011:

Scramble: R2 F D2 L F' U2 F2 U' L' B' L F2 U2 L2 F2 R2 U B2 U2 R2 D2

After a few minutes I found the following block:

2x2x2: R2 U2 B2 U' R'
2x2x3: F' L' B D B'

I spent the next 20 minutes NISSing this and other beginnings I had found, then went back ooking to the block again and what what I had at first not seen:

3 corners+1 twisted: D R F2 R' D F' R F R' D'

with a setup before sledgehammer it gives a pure 3-cycle: D R F2 R' D L' F' R F R' L D'

The corners were placed rather bad going through my partial solution. At least I was able to cancel 2 moves at 2 spots:

3-cycle: R2 U2 B2 U' R' F' L' B D B' . D R F2 R' D L' F' R F R' : L D'

. = F2 D B D' F2 D B' D'
: = B2 L F L' B2 L F' L'

I randomly chose the second one.

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

28 moves


After all a very standard solution. I'm so happy that this was enough to win. :)
Click to expand...

CONGRATS!!!
 
guusrs said:
I all,

Here's the WC Bangkok 2011 scramble:

R2 F D2 L F' U2 F2 U' L' B' L F2 U2 L2 F2 R2 U B2 U2 R2 D2

What can you do with it?
Click to expand...

Of course I tried it myself. pretty nasty scramble for me!
I got very promising starts I had to work out, but oops time was up.
I was left with a 33-move (10min) backup solve....

Congratz to all the sub-30 solvers!

@Cuberbruce: be there next time!
 
6minutes
R2 F D2 L F' U2 F2 U' L' B' L F2 U2 L2 F2 R2 U B2 U2 R2 D2
WC2011
I very hurry.
I did 38moves
U F' R2 D' R D'
B' U' B2 U B' U'
F U F'
R' U R F' U' F
U2 R' U' R
U' R' U2 L U' R U2 L' U L U2 L' U
 
guusrs said:
Congratz to all the sub-30 solvers!

@Cuberbruce: be there next time!
Click to expand...

Well, I figured it would require at least a sub-30 solve to win, and not ever having a sub-30 solve within a 1-hour time limit, I didn't think my chances of winning justified such a trip. And my 26-move solve involved some luck, I would have to say. In trying to build a square in the last layer from a CE pair, and trying an "inefficient" alternative from the most obvious ways of doing it, I stumbled upon what I view as a 5-piece skip.

I spent about the first 35 minutes trying to work with either of the two 1-move CE pair cases. Frustrated by failing to come up with any sort of good skeleton this way, I decided to look at building a different 2x2x2. By 40 minutes, I had found a 28-move solution. In the last 20 minutes, I only needed to find an insertion with one move cancelling to get under 28. I note that the 2x2x2 I started with is the same as Sebastien's, except Sebastien built it in 5 moves instead of 6.

I congratulate Sebastien on his win.
 
My 29 move solution for =2nd place at WC2011. My solution is a fair bit more complicated that Sébastien's so apologise in advance if you are trying to 'reconstruct' it yourself!

Scramble: R2 F D2 L F' U2 F2 U' L' B' L F2 U2 L2 F2 R2 U B2 U2 R2 D2

I found this 2x2x2: F2 R' F' D L D (6)
Insert a few moves to it to make a pseudo 2x2x3: F2 R' F' D L B U' B D L' (10)
Switch to inverse scramble (premoves L D' B' U B' L' D' F R F2): L2 B' L B' U2 B2 U2 B U (19)
I actually found that inverse part by using another premove U (which can be seen at the end there)
So, now I have 4 corners left, in 2+2 but misoriented states :/
I've have little experience in doing 4 corner insertions, so it probably wasn't the optimal ones, but here they are:
Solution so far: F2 R' F' * D L . B U' B D L' U' B' U2 B2 U2 B L' B L2 (19)
Insert F D' B' D F' D' B D at *
Insert L' F2 L B' L' F2 L B at .
Both cancel 3 moves to give: F2 R' D' B' D F' D' B D2 F2 L B' L' F2 L B2 U' B D L' U' B' U2 B2 U2 B L' B L2 (29)

Congrats to my fellow medalists Sébastien and Milán.
There's always a risk that with so many people, the podium turns into a lottery in which someone random flukes a win, but thankfully our past records show that wasn't the case this time :)
 
My first FMC since months and PB: 33 HTM

Scramble from Weekly Challenge: R2 U2 B F2 U2 F2 L' D R' D' R' B' U' R F U2 L' U2

Start on inverse scramble:
2x2x2: L' B' U F' U2 (5/5)

Amply on the normal scramble with Premoves: U2 F U' B L:
2x2x3: R' D R2 D2 R D (6/11)
Found premove F (1/12)

Start with normal scramble with premoves F U2 F U' B L than do R' D R2 D2 R D
F2L: R F R2 D' F2 D F D R' D' (10/22)
OLL: D R D' R' B' D' F D F' B (10/32)
Than I experimented a bit with different Jb-Perms and used the one, which is just mirrowed to my Ja, so that it cancles some moves.
PLL: B R' F R2 B' R B R2 B' F' (10/42)
Undo premoves: F U2 F U' B L

Totally solution: R' D R2 D2 R D R F R2 D' F2 D F D R' D' D R D' R' B' D' F D F' B B R' F R2 B' R B R2 B' F' F U2 F U' B L (-9/33)
After cancellation: R' D R2 D2 R D R F R2 D' F2 D F R' B' D' F D F' B2 R' F R2 B' R B R2 B' U2 F U' B L (33 HTM)
 
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Scramble: D' F U F2 R2 U2 R' B2 F2 D F' L2 F' L' U F' D' U' B2 D B2 L2 R' D2 U'

Incomplete solution:
2x2x2 block: x' U2 F L2 D2
2x2x3 block: R2 F2 U' F R'

Can someone please continue on from this. I spent a while trying to efficiently extend the 2x2x3 block and make a nice skeleton.
I'm having a lot of trouble progressing from the 2x2x3 block in all my FMC attempts. Thanks.
 
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