[Help Thread] FMC Discussion

[BQ]

Thanks for the answer, and for searching it manually!

23 is surprising. Although I doubt I could have even gotten sub-27.

Hmm, in fact, since I selected the "other" algorithm, there're some insertions like "L2 F L2 F'", which is not so common. I've searched for only 3-cycle algorithms. See here: http://mf.qiyuuu.com/cube/if/7048d95774ae1cade5320b1933157d3c.cube
It's 27 moves.

 

[CyanSandwich]

Hmm, in fact, since I selected the "other" algorithm, there're some insertions like "L2 F L2 F'", which is not so common. I've searched for only 3-cycle algorithms. See here: http://mf.qiyuuu.com/cube/if/7048d95774ae1cade5320b1933157d3c.cube
It's 27 moves.

Oh cool. Definitely couldn't have gotten sub-27 then

 

[Cale S]

26 for Weekly FMC with no cancelled moves from insertion

Spoiler

scramble: F' D2 L R F B2 L' R2 B R' B2 L R' B' D' U L2 R2 D L'

B U2 // square
F R' // 2x2x2
B (D' B) // 2x2x3
L' D2 B (B) // F2L - 1
F' D' F // F2L
F' R' D' R D F D2 // L3C

B U2 F R' B L' D2 B ^ F' D' R' @ D' R D F D2 B2 D

optimal insertion is 8, you can get it with [F R2 F', L2] at ^ or with [R, D2 L D2 L' D2] at @ (lol 12 move comm being optimal)

 

[Kit Clement]

PB'd the weekly with a 19 move solution. Ryan and I found this solution independently while we were on Discord (he found it about 5~10 minutes before I did though).

Spoiler

Scramble: F' D2 L R F B2 L' R2 B R' B2 L R' B' D' U L2 R2 D L'
I: F' R B' //2x2x2
N: L B' U B F2 //add two 2x2x1s and a pair on the same F2L
I: L F U' L' U L F U' F' //L3C

Skel: L B' U B F' (1) U F' L' U' L U F' L' B R' F

1: F D F' U F D' F' U'

Final: L B' U B D F' U F D' F2 L' U' L U F' L' B R' F (19)

 

[TeddyKGB]

PB'd the weekly with a 19 move solution. Ryan and I found this solution independently while we were on Discord (he found it about 5~10 minutes before I did though).

Spoiler

Scramble: F' D2 L R F B2 L' R2 B R' B2 L R' B' D' U L2 R2 D L'
I: F' R B' //2x2x2
N: L B' U B F2 //add two 2x2x1s and a pair on the same F2L
I: L F U' L' U L F U' F' //L3C

Skel: L B' U B F' (1) U F' L' U' L U F' L' B R' F

1: F D F' U F D' F' U'

Final: L B' U B D F' U F D' F2 L' U' L U F' L' B R' F (19)

Who's this Ryan guy? he sounds interesting...

 

[irontwig]

PB'd the weekly with a 19 move solution. Ryan and I found this solution independently while we were on Discord (he found it about 5~10 minutes before I did though).

Spoiler

Scramble: F' D2 L R F B2 L' R2 B R' B2 L R' B' D' U L2 R2 D L'
I: F' R B' //2x2x2
N: L B' U B F2 //add two 2x2x1s and a pair on the same F2L
I: L F U' L' U L F U' F' //L3C

Skel: L B' U B F' (1) U F' L' U' L U F' L' B R' F

1: F D F' U F D' F' U'

Final: L B' U B D F' U F D' F2 L' U' L U F' L' B R' F (19)

I just knew I was missing something, got a 27 on that scramble. Speaking of which I also got a 27 on the other weekly. Maybe we should agree upon what to call these two?

 

[Cale S]

Speaking of which I also got a 27 on the other weekly. Maybe we should agree upon what to call these two?

I just call them Weekly FMC and Weekly Comp, but I really only do one

 

[kbrune]

Where is the weekly FMC ? in forum comp thread? Or is it from the weekly comp thread?

 

[irontwig]

Where is the weekly FMC ? in forum comp thread? Or is it from the weekly comp thread?

This one: https://www.ocf.berkeley.edu/~dadams/fmc/
...or this one: https://www.speedsolving.com/forum/threads/weekly-competition-2016-21.61035/
...or maybe even this one: http://speedcube.de/forum/showthread.php?tid=5795

 

[okayama]

I seem to miss posting my solution for Weekly FMC this week (#126), so here it is:
Scramble: F' D2 L R F B2 L' R2 B R' B2 L R' B' D' U L2 R2 D L'
Solution: L U F B L F' D2 F D F2 D2 F D F' R' L D2 R L' F2 D F2 L2 R' F (25 moves)

Spoiler

Firstly I found the following solution (28 moves):

Pre-scramble: L2 R' F

F2L minus 1 slot: L U F B L
All but 3 corners: D' F' D' F D' F' D2 B' D F D' B
Correction: L2 * R' F

Insert at *: B2 U' F' U B2 U' F U

No move cancels

Another attempt (27 moves):

All but 5 corners and 2 edges: L U F B * L' R' F
All but 5 corners: U' (U B' U R2 D' F D R2 U2 B) U
Insert at *: F' R' B' R F + R' B R
Insert at +: D2 R' U2 R D2 R' U2 R

Final solution (25 moves):

Pre-scramble: F L2 R' F

F2L minus 1 slot: L U F B L F'
F2L minus 1 edge: D2 F D F'
All but 3 edges: F' D2 F D F' * D F
Correction: F L2 R' F

Insert at *: R' L D2 R L' F2

 

[Cale S]

pretty cool solution for current Weekly FMC

Spoiler

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

(D' R' D R') // 2x2x2
(L2 U F U) // xxcross
D R' F R D' F' // 3e4c

D R' F R D' F' U' F' U' @ L2 R D' R D

@ = U2 R U2 R' U2 R U2 R'

L3C skeleton:
D R' F R D' F' U' F' U R ^ U2 R' U2 R U2 L2 D' R D
^ = [R2, U L U']

Final solution: D R' F R D' F' U' F' U R' U L U' R2 U L' U R' U2 R U2 L2 D' R D (25)

I was hoping the insertion would cancel more, but at least it cancelled something unlike last week

I also couldn't find anything with the 2 move pseudo 2x2x2

rolls avg25 to 25.14

 

[irontwig]

Cool, I got a 24 on that scramble. Did you try

Spoiler

any EO starts?

 

[Cale S]

Cool, I got a 24 on that scramble. Did you try

Spoiler

any EO starts?

The 2 move pseudo 2x2x2 orients all but 2 edges and trying to modify it to orient all didn't really work, but I'll look at some more

 

[Bubtore]

I tried those scramble with Emilien Fabre and he has destroyed me ...

http://iwca.jp/competition/scrambles/competitionId/FMCLatinAmerica2016/eventId/333fm

1. S // D2 R2 U R2 U' F2 R2 D2 F2 R2 F' U' B F' L D' B2 F2 R'
I // R F2 B2 D L' F B' U F R2 F2 D2 R2 F2 U R2 U' R2 D2

(D2 L) // EO (2)
(D L2 B D2 B D R2 L2) // 2x2x3 (8)
(U' B2 U B U2 B' U) // F2Ls (7)
(D B' U' B D' B U B U' B U) // (11) solved

Solution // U' B' U B' U' B' D B' U B D' U' B U2 B' U' B2 U L2 R2 D' B' D2 B' L2 D' L' D2 - 28 HTM


2. S // U' R' U L B L' D R' F' U D R L2 B2 R B2 D2 L F2
I // F2 L' D2 B2 R' B2 L2 R' D' U' F R D' L B' L' U' R U

(D2 R D L2) // '2x2x2' (4)
L' // 2x2x2 (1)
(R' B2 D2 L B2 L' B D' R) // ? (9)
B' // ?? (1)
(D' R D' R' B D B R' B' D') / LL skip (10)

Solution // L' B' D B R B' D' B' R D R' D R' D B' L B2 L' D2 B2 R L2 D' R' D2


3. S // R' D R' B R' B2 D2 L U2 D L2 D R2 U R2 L2 F2 L2 D'
I // D L2 F2 L2 R2 U' R2 D' L2 D' U2 L' D2 B2 R B' R D' R

(D2 R2 B') // EO (3)
(L' D' F2 U' D') // Trolol (5)
(L U L U' + L F2 L) // 2E2C (7)

+ U L' U B2 D' R D B2 U2 L

Solution // L' F2 L2 U2 B2 D' R' D B2 U2 L' D U F2 D L B R2 D2 - 19

24 mo3 for him !

 

[Attila]

Scramble (from example solve thread):
F2 R2 U2 L2 D' B2 D F2 R2 L D R U2 L D L' B' F R2

I found this 19-move skeleton:
((L U2 B F2 L' B)
(U L D U' F')
(U' B' U2 D2 F)
(U'B2 D)
Can anyone find a good insertion?

 

[porkynator]

I have found this insertions using conjugates:
(L U2 B F2 L' * B)
(U L D U' F')
(U' B' U2 D2 + F)
(U'B2 D)

* = M'
+ = F' R L2 U M U' L2 R' F

But Insertion Finder does a better job with commutators
L U2 B F2 L' B U [@1] L D U' F' U' B' U2 D2 F U' B2 D
Insert at @1: F' L U' D F' R F U D' L'
After the 1st insertion: L U2 B F2 L' B U F' [@2] L U' D F' R U' B' U2 D2 F U' B2 D
Insert at @2: F U2 L2 D2 B D2 L2 U2
Fewest moves: 26. 11 moves cancelled
The final solution: L U2 B F2 L' B U' L2 D2 B D2 L2 U2 L U' D F' R U' B' U2 D2 F U' B2 D

 

[tseitsei]

Nice result for a first FMC after a long pause (22moves I think 3rd best result ever for me). Berkeley weekly ongoing comp.

Spoiler

Scramble: L2 D' F2 U R' D F' L' R' U B2 F' L U B R B F2 U' B2
Solution: F' R L2 U2 B' L' B L U B U2 B' U B2 U2 B' D' B U2 B2 R D (22 moves)

Explanation:
F' R //2x2 block on normal (2/2)
on inverse with premoves R' F:
D' R' B D //pseudo 2x2x3 (4/6)
Add premove L2 R' F to fix pseudoness (1/7)
still on inverse premoves :
B' U' B //1x2x3 block!!! (3/10)
Here I tried a lot of stuff to leave just 3 corners. Finally I added one more premove U2 (1/11)
Still on inverse with premoves U2 L2 R' F:
U2 B' U' // EO plus loads of blocks! (3/14)
L' B' L B // All but 3C (4/18)

So all together skeleton on normal:
F' R L2 U2 B' L' B L U B U2 B' U B D' [1] B' R D (18)

[1] = D B U2 B' D' B U2 B' // 4 moves cancel (4/22).

 

[goodatthis]

A good skeleton, but a bad insertion:

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

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

B2 U R' B2 * // 2x2x2
U' F2 R' U' R // 2x2x3
F R F2 U' // F2L-1
Switch
L F2 L' // square
F' L F L2 U L U' F' // to L3C (24 move skeleton)

* = B U2 B' D2 B U2 B' D2 (according to IF, this is optimal, despite only cancelling 1 move)

Final solution: B2 U R' B' U2 B' D2 B U2 B' D2 U' F2 R' U' R F R F2 U' F U L' U' L2 F' L' F L F2 L' (31)

On the good side, it's my first time using insertions, I finally got them to work, despite somehow cycling the three corners incorrectly multiple times before using a different commutator. It's also my PB, although I wanted a sub 30 solution.

Any tips/continuations after my start?

EDIT: found this after F2L-1 on normal, but didnt pursue it earlier because I don't know multiple insertions:

F L F' D F' D' L' //EO + to L4C (basically just an insertion of the pair from U2 with a cancellation into F inverse sexy F') (20 move skeleton)

Insertion finder gives 30 moves to be optimal:

B2 U R' B2 U' F2 R' [@1] U' R F R F2 U' F L F' D F' D' L'
Insert at @1: R2 U' L2 U R2 U' L2 U
After the 1st insertion: B2 U R' B2 U' F2 R U' L2 U R2 U' L2 R F R F2 U' F [@2] L F' D F' D' L'
Insert at @2: F' L' B' L F L' B L
Fewest moves: 30. 6 moves cancelled
The final solution: B2 U R' B2 U' F2 R U' L2 U R2 U' L2 R F R F2 U' L' B' L F L' B L2 F' D F' D' L'

B2 U R' B2 U' F2 R' [@1] U' R F R F2 U' F L F' D F' D' L'
Insert at @1: R2 U' L2 U R2 U' L2 U
After the 1st insertion: B2 U R' B2 U' F2 R U' L2 U R2 U' L2 R F R F2 U' [@2] F L F' D F' D' L'
Insert at @2: L' B' L F L' B L F'
Fewest moves: 30. 6 moves cancelled
The final solution: B2 U R' B2 U' F2 R U' L2 U R2 U' L2 R F R F2 U' L' B' L F L' B L2 F' D F' D' L'

 

[Scruggsy13]

My first attempt using NISS:

Scramble: R2 D R' D' L' D R B L D' F2 U2 L2 U2 F L2 D2 B' D2 R2

Start on inverse
(B D2 U2 L2) // 2x2x2
R2 F D' F' D' // 2x2x3
(R' F' D R D') // F2L-1
F R F2 U F U' // F2L + EO
D R2 D2 R' D2 R' D2 R2 D // COLL

Final solution: R2 F D' F' D' F R F2 U F U' D R2 D2 R' D2 R' D2 R2 D2 R' D' F R L2 U2 D2 B' (28)
(previous PB was 42 lol)

 

[ottozing]

Probably the most ridiculous thing I've ever done with a 3 corner 3 edge skeleton. I had a choice between doing 22 to 3C3E or 22 to 4C. On paper, 4C > 3C3E but 3C3E just has that magical bs quality to it that I've come to love

Spoiler: Solution

F R2 B2 U' L2 D R2 D R2 D F2 R' F' U B2 L R' F2 U R

D2 (Make pair)
Switch
R2 F' U2 (1x2x2 + 2 pairs)
Switch
B2 U' (1x2x3)
Switch
D L2 U2 L' (2x2x3)
Switch
R' D B D' B2 (F2L-1)
D' R' D R' D' R2 D (3C3E)

Skeleton: D2 B2 U' R' D B D' B2 % D' R' D R' D' R2 D L U2 L2 D' U2 F R2 (22)

% D' R D R2 D' R D (Reduce to a 3 corner skeleton)

New skeleton: D2 B2 U' R' D B D' B2 D' R D R D' R2 D ^ L U2 L2 D' U2 F R2 (22 lol)

^ D B U' B' D' B U B'

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

Insertion finder says optimal is 31 :^)