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The FMC thread

Ranzha

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Congratulations to Walker for the WR mean!

I'm overall pleased with the mean, especially being out of practice and with many other responsibilities for the competition, though I goofed on the second attempt:
Scramble: R' U' F R2 D' B2 F2 R2 D' U2 F2 U' L2 B D2 B' L' B' L2 D' U L2 B' U2 R' U' F

(L B2 D R) // EO
(B' U2) // 3 pairs?!?!?!
D R2 // 222
(B' D' L2 B2) // another square, lots of pairs
(L2 B D B' D' B2 D) // ?! oh it's just 3 corners

Skeleton: D R2 D' B2 D B D B' L2 B2 L2 D B U2 B (1) R' D' B2 L' // 19
(1): [D2, R' U2 R] // 8-2

Final: D R2 D' B2 D B D B' L2 B2 L2 D B U2 B D2 R' U2 R D2 R' U2 D' B2 L' // 25
Scramble: R' U' F R2 D2 U B2 D F2 U' B' L' F' L' U2 B' D' L2 B F D2 U R' U' F

(F2 B U' D2 L) // 222
(F' U' R2 U F') // 223
R2 D B (B) // F2L-1
(U' R' B' R B U R' F' R F) // L4C ew

Skeleton: R2 (3) D B (1) F' R' F R U' B' R' B R U B' F U' R2 U F L' D2 U B' F2
(1): [R' B' R, F'] // 8-4
(3): [L, D' R2 D] // 8-1

Final: R2 L D' R2 D L' D' R2 D2 B R' B' R F' R' B F R U' B' R' B R U B' F U' R2 U F L' D2 U B' F2 // 35

I ran out of time for insertions and handed in my solution with 10 seconds to spare.
Optimal is 34.
Scramble: R' U' F R2 D2 R2 U B2 F2 L2 F2 U F U2 R F' L2 R' U R D2 B R' U' F

D B U // square + 2 pairs
(D B) // 123
R' B R D // more
R U L2 U' F2 R' // F2L-1 + 1 pair
D F' D' F // make it a square
D L D' L' // all but 3 pairs?!?!?!

Skeleton: D B U R' B R D R U L2 U' F2 R' D F' D' F D L D' L' (1) B' D' // 23
(1): [D, B L B'] // 8-1

Final: D B U R' B R D R U L2 U' F2 R' D F' D' F D L D' L' D B L B' D' B L' B2 D' // 30

25, 35, 30 = 30.00 mean
 

porkynator

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Here are my solutions to my FMC WR Mean from FMC Americas 2017!

22, 23, 27 = 24.00

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

start on inverse:
(R2 D' F) // EO (3/3)
(R' B2) // 2x2x1 (2/5)
(F2 D R2 D R') // Pseudo F2L-1 (5/10)
switch
L // F2L-1 (1/11)
B' // pair (1/12)
L D' L' D2 L D L' D' B D2 // LL skip (forced) (10/22)

Solution: L B' L D' L' D2 L D L' D' B D2 R D' R2 D' F2 B2 R F' D R2 // 22

I originally found the easy 18 to L3C after switching with L2 D' L' D2 L D L' D but optimal was a 23. After finding the 23 I went back to the F2L-1 and found the skip.

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

start on normal:
R U' F' // EO (3/3)
D2 R2 // 2x2x1 + 3 pairs (2/5)
switch
(D) // pair (1/6)
(R2 D' R) // 3x2x1 plus RB edge (3/9)
switch
U' L' D // 2x2x3 (3/12)
F2 R U' R' U2 // 17 to L3C (5/17)

skeleton: R U' F' D2 R2 U' L' D F2 R U' R' U2 R' D R2 D' (D B2 D' F D B2 D' F') // cancels 2

Solution: R U' F' D2 R2 U' L' D F2 R U' R' U2 R' D R2 B2 D' F D B2 D' F' // 23

Optimal insertion
The only other skeleton I found on the attempt was a 17 to L5C which optimal was 28. I spent most of my time looking at the start that I had because the EO 2x2x1 made a lot of really nice pairs and I just had to put them somewhere nice. ;)

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

start on normal:
F2 U2 R' F L2 // 2x2x2 (5/5)
switch
(R' U' B2) // Pseudo 2x2x3 (3/8)
switch
B2 // solve 2x2x3 (1/9)
switch
(F' U' F2 R F') // EO + set up edges [F' U' F solved EO] (5/14)
(U2 R2 U2 R) // 18 to L4C (4/18)

skeleton: F2 U2 R' F L2 B2 @ R' U2 R2 U2 F R' F2 U F B2 U R
@ = U' L' U R' U' & L U R // cancels 3
& = U R D R' U' R D' R' // cancels 4

Solution: F2 U2 R' F L2 B2 U' L' U D R' U' R D' R' L U' R2 U2 F R' F2 U F B2 U R // 27

Optimal on the 18 to L4C is 27! I found about 5 first insertions that canceled 3 and I spent the rest of my remaining time searching through those to possibly find one that cancelled 5 or more.

One big thing that I missed, after finding the 27 on the 18 to L4C I didn't really remember that I had other skeletons that I wrote down and could try, so thats why I kept looking for nested insertions.

I did find this though:
start on normal:
D2 B R' L U' // EO (5/5)
L F2 // 2 2x2x1s (2/7)
R B' // 2x2x3 (2/9)
switch
(D) // 2 pairs (1/10)
switch
D' L' D' L2 D L' // 16 to L3C + L3E (6/16)

These were the optimal insertions:
skeleton: D2 B R' L U' L F2 @ R B' D' L' D' L2 D L' D'
@ = F' B L2 B' & F U2 // cancels 1
& = B L2 B' R2 B L2 B' R2 // cancels 6

D2 B R' L U' L F R2 B L2 B' R2 F U2 R B' D' L' D' L2 D L' D' // 23
All together it would have been a 22.67 mean.

Even though I missed that 23 I am still really happy I finally got FMC WR Mean.
Huge congrats!
Nice touch with the LL skip ending on the first solve.
I really like the second solve, I don't really know why. Maybe because I would have (possibly) tried different things after the EO.
 

TheDubDubJr

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Huge congrats!
Nice touch with the LL skip ending on the first solve.
I really like the second solve, I don't really know why. Maybe because I would have (possibly) tried different things after the EO.
Thanks Sebastiano :)
Yea on the second solve it seemed like there were so many different ways to go on it. I talked to a couple people who found the start and had different continuations.
 

williamwhizz

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FMC 32 HTM, 3rd place at MCO, pretty satisfied coz i found it in under 20 min :D , but I couldn't find anything better within the remaining time :/
s: R' U' F L2 R2 F2 D2 F2 D2 L2 U R B' L2 R' F2 D2 R B2 D' L U' R' U' F

F L' D' L R' U' B D2 // 2x2x3 (8/8)
(F U' F' U' F) // F2L-1 (5/13)
(L' B' U2 B U' L) // F2L (6/19)
(R' U' F' U F R U') // 3C (7/26)

Skeleton: F L' D' L R' U' B D2 U R' F' U' F U R L' U B' U2 B L F' U F U F' @ (26)
@: F R B R' F' R B' R' cancels 2

Final : F L' D' L R' U' B D2 U R' F' U' F U R L' U B' U2 B L F' U F U R B R' F' R B' R' (32)
Can anyone find a better continuation with my 8-move start?
 
Last edited:

AlphaSheep

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What's the purpose of R' U' F at the beginning and end of all FMC scrambles?
Because of the nature of the algorithm used to generate scrambles, half of normal scrambles preserve orientation. Because of that, it's was possible to derive short, often close to optimal EO solutions from the scramble, and also possible to stumble on solutions that happen to match the scramble by accident.

R' U' F involves a quarter turn on every axis, so it disturbs EO on every axis. This means that the orientation preserving part of the scramble preserves an orientation that's not the solved state's orientation, which makes it useless for cheating.

R' U' F is also kind of nice to fingertrick.

There's a lot more detail here: https://github.com/thewca/tnoodle/issues/210
 

guusrs

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Hard FMC scramble yesterday at Dutch Open:

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

Anyone better than 26 (=my winning solution) ?

on inverse:
pseudo 2x2x3: L' F B' R' B U' R' L2 U' R' (10)
swith to normal with premoves (R U L2 R U B' R B F' L)
L3C: U2 L' F L F D' F' D' F2 L' F' L D2
premove correction: R U @ L2 R U B' R B F' L
at @ insert U' R U L2 U' R' U L2, 5 moves cancel (=optimal)
 

guysensei1

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Dadams weekly, 26

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

U B D L D L2//222 (6/6)
B' U2 R U B R'//223 (6/12)
L U L' U2//F2L-1 (4/16)
(B R D B2 D' R')//EO (6/22)
(U' B U B2)//LL skip (4/26)
 

porkynator

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Hard FMC scramble yesterday at Dutch Open:

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

Anyone better than 26 (=my winning solution) ?

on inverse:
pseudo 2x2x3: L' F B' R' B U' R' L2 U' R' (10)
swith to normal with premoves (R U L2 R U B' R B F' L)
L3C: U2 L' F L F D' F' D' F2 L' F' L D2
premove correction: R U @ L2 R U B' R B F' L
at @ insert U' R U L2 U' R' U L2, 5 moves cancel (=optimal)
Nice solve, and congrats for winning!

I am afraid I've lost the piece of paper with my solution, but it was terrible anyway.
I have the following start (on normal scramble):

2x2x1: U2 R U' L'

Possible continuation: R' D2 R D'
This gives a lot of nice pairs, but I couldn't find any decent finish.

Another possible continuation: R2 D2 R D' B2 U2 F
where the last move can be cancelled into F' L F for better edge orientation.
 

guysensei1

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Any better ending for this 7 move 2x2x3 start? Ending with CFOP is unsatisfactory


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

(B2 D' B2)//2x2x2 (3/3)
F R F2//pseudo 2x2x3 (3/6)
(F2 R2 F D' F')//correction+EO (5/11)
R2 D' R2 //F2L-1 (3/14)
(R D R' D' R D R')//F2L (7/21)
(L' D2 L D L' D L)//LL (7/28)
 

Neuro

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From the weekly FMC thread, a 28 move Roux solve

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

R L' B2 D2 F' R U//FB
B' D U R' U' D' B' U R U F D//SB+CMLL
F U' D R2 U D' F U2 D2//LSE

My official is a 26 with Petrus though

D F2 B' U' R' D F' D2 L B'//2x2x3+Pairs
R F' U F2 R F'//EO w/ pair preservation
U' R U R U R U2 R' U2 R//Solved
 

ChrisCuber123

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Hard FMC scramble yesterday at Dutch Open:

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

Anyone better than 26 (=my winning solution) ?

on inverse:
pseudo 2x2x3: L' F B' R' B U' R' L2 U' R' (10)
swith to normal with premoves (R U L2 R U B' R B F' L)
L3C: U2 L' F L F D' F' D' F2 L' F' L D2
premove correction: R U @ L2 R U B' R B F' L
at @ insert U' R U L2 U' R' U L2, 5 moves cancel (=optimal)
I found this:
U2 R B L' // EO (2 pairs)
U' B D' R2 B2 D2 B' (U) // 2x2x3
F2 L2 F L2 // 4e + 3 twisted corners
skeleton: U2 R B L' U' B D' R2 B2 * D2 B' F2 L2 F L2 U'
*: B' ^ D' B D' B' D2 B D2 // solves corners, leaves 4e, cancels 5
^: B2 U2 F2 U2 B2 D2 // 2e2e, cancels 2
final solution: U2 R B L' U' B D' R2 B' U2 F2 U2 B2 D B D' B' D2 F2 L2 F L2 U' (23)

extremely lucky, but a good solve nonetheless
 

guysensei1

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From the weekly FMC thread, a 28 move Roux solve

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

R L' B2 D2 F' R U//FB
B' D U R' U' D' B' U R U F D//SB+CMLL
F U' D R2 U D' F U2 D2//LSE
Notice that the moves I bolded are just an edge comm. We remove that from the solution and insert the edge comm somewhere else. (And your U2 D2 at the end will cancel 1 move off SB+CMLL too)

Skeleton:
R L' B2 D2 F' R U B' D U R' * U' D' B' U R U F D' U2

*= R F R' U D' F L' F' U' D

Cancels 5, giving 25 as final
 

Hssandwich

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Just got a 26.00 NR mean at UK Championships :D Very happy with this, the first two scrambles were very nice, the final one wasn't as good, but I still managed NR :)


#1: 26
R' U' F U2 L2 B2 U2 F2 D F2 U' F2 D B2 L' D' U2 B U2 L D2 B' U' R' U' F


B' L' // 2 squares!
U2 R U2 //2x2x2 +square
D2 (D) //2x2x3
F U' F' U2 L U' (L) //pseudo F2L-1 + square
F2 L F L' F' L F L' //21 to 3c

Skeleton: B' L' U2 R U2 D2 F U' F' U2 L U' @ F2 L F L' F' L F L2 D'

@L' B' L F2 L' B L F2 (3 cancel)

Solution: B' L' U2 R U2 D2 F U' F' U2 L U' L' B' L F2 L' B L2 F L' F' L F L2 D' (26)

Very nice scramble, I was pretty happy with 26 though :)

#2: 24

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

R' U L //square with lots of pairs
(U2 F2) //2x2x2 with lots of pairs too :)
(D' B R2) R2 //2x2x3
(B' L' D2 L) //F2L-1
(D' B2 D) // F2L
(L' D L D' B2 D' B2 D) //LL

Solution: R' U L R2 D' B2 D B2 D L' D' L D' B2 D L' D2 L B R2 B' D F2 U2 (24)


Very happy with this solve, albeit pretty lucky. I did also have two 22 to 3c skeletons and a 21 to 3c.

#3: 28
R' U' F L2 D B2 F2 D U R2 F U2 L' U' R' F D' L2 D L2 U2 B R' U' F

(L2 D2 L) // EO
F D F // square + pairs
(D B R2 D) //2x2x2 +pairs
(D' U' B U B' D B' U2 B') //17 to 3c3e

Skeleton: F D F B U2 B D' B @ U' B' U R2 B' D' L' D2 L2
@B2 F' U B' U' B' F //leave 3c

New skeleton: F D F B U2 B & D' B' F' U B' U' B' F U' B' U R2 B' D' L' D2 L2
& F2 D' B D F2 D' B' D (3 cancel)

Solution: F D F B U2 B F2 D' B D F2 D' F' B2 U B' U' B' F U' B' U R2 B' D' L' D2 L2 (28)

I'm pretty sure I was the most nervous about an official solve that I've ever been during this... I thought I was going to have to finish on 30 until I realised that I wrote the first insertion wrong (and it cancelled an extra move!), so I checked for the 3c insertion, and I was really relieved :)


Here are some other things I found on all the scrambles, the first two in particular

#1
B' L' made two squares, which hardly anybody noticed for some reason...
From here, (L' D' U2) U2 makes a 6 move 2x2x3, but I couldn't find any good continuations

But adding a (U) before (L' D' U) makes some pair, then fixing the pseudo on the normal scramble maes another square!
From there, you can do 2 more moves to F2L-1 in 9 moves :)
B' L'
(U L' D' U)
U2 R' (R2) / U2 R2 (R)

There's isn't much from then on, besides a 16 to 5c - B2 U' L' B' L U B' - that I didn't have time to insert, and a 16 move F2L with a not great LL.

#2
F' R F/F' solved B/G EO with 2 pairs, but I didn't find anything great from there

I found my R' U L square start right at the beginning, so I didn't find much else different.

Here's a backup 21 to 3c:
R' U L //square
(F2 R' B2 R) //another square
(F2 U2 F2) //2x2x2
(B2 D B2) // XXcross
(R2 F' R2 F) //F2L-1
(U R U' R') //leave 3c

I played around with stuff on the inverse, and saw that (U2 F2) made lots of pairs /pseudosquares
Then I found this cool skeleton
(U2 F2)
(D' B U') //1x2x3
(F R) //2x2x2
(U2 R B R' L U') //leave 3c3e+1flipped edge
I don't think I found anything though

Also this:
R' U L (U2 F2)
(D' B R B)
L' R' D2 L D' R2

R' U R' D2 @ L D' & R2 B' R' B' D F2 U2
@L B' L' F D' B' D B F' //22 to 3c
&R' B' R F' B D B' D' F //22 to 3c

#3
(D2 U' B2) U2 is a pretty nice 2x2x2
Then U' makes a square, so possible 2x2x2s + squares include (D2 U' B2) U' F' U F / U' F2 U F
I didn't really find much after this, so I abandoned it after 15 mins or so (in hindsight a little too long spent on it)

I played by around with EO starts, including F' (L F')
Which led to (D) D2 F2 making a 6 move EO 2x2x2
Nothing much after this though :/

For my actual solution, I could have done
(L2 D2 L)
F D F
(D' F' D2) for the same 2x2x2, but this broke up some pairs, so I didn't use it

I also had a 31 move backup solution:
(D2 U' B2)
U' D' F2 U' F2 (F') // the D' is an inserted move to make some pairs
(D2 R F D' F') //F2L-1
(R D' R' D R2 B R2 B') //F2L
(F' R' F R F D' F' D R2) // LL

Very happy with all of this :D
 

TDM

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Just got a 26.00 NR mean at UK Championships :D Very happy with this, the first two scrambles were very nice, the final one wasn't as good, but I still managed NR :)


#1: 26
R' U' F U2 L2 B2 U2 F2 D F2 U' F2 D B2 L' D' U2 B U2 L D2 B' U' R' U' F


B' L' // 2 squares!
U2 R U2 //2x2x2 +square
D2 (D) //2x2x3
F U' F' U2 L U' (L) //pseudo F2L-1 + square
F2 L F L' F' L F L' //21 to 3c

Skeleton: B' L' U2 R U2 D2 F U' F' U2 L U' @ F2 L F L' F' L F L2 D'

@L' B' L F2 L' B L F2 (3 cancel)

Solution: B' L' U2 R U2 D2 F U' F' U2 L U' L' B' L F2 L' B L2 F L' F' L F L2 D' (26)

Very nice scramble, I was pretty happy with 26 though :)

#2: 24

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

R' U L //square with lots of pairs
(U2 F2) //2x2x2 with lots of pairs too :)
(D' B R2) R2 //2x2x3
(B' L' D2 L) //F2L-1
(D' B2 D) // F2L
(L' D L D' B2 D' B2 D) //LL

Solution: R' U L R2 D' B2 D B2 D L' D' L D' B2 D L' D2 L B R2 B' D F2 U2 (24)


Very happy with this solve, albeit pretty lucky. I did also have two 22 to 3c skeletons and a 21 to 3c.

#3: 28
R' U' F L2 D B2 F2 D U R2 F U2 L' U' R' F D' L2 D L2 U2 B R' U' F

(L2 D2 L) // EO
F D F // square + pairs
(D B R2 D) //2x2x2 +pairs
(D' U' B U B' D B' U2 B') //17 to 3c3e

Skeleton: F D F B U2 B D' B @ U' B' U R2 B' D' L' D2 L2
@B2 F' U B' U' B' F //leave 3c

New skeleton: F D F B U2 B & D' B' F' U B' U' B' F U' B' U R2 B' D' L' D2 L2
& F2 D' B D F2 D' B' D (3 cancel)

Solution: F D F B U2 B F2 D' B D F2 D' F' B2 U B' U' B' F U' B' U R2 B' D' L' D2 L2 (28)

I'm pretty sure I was the most nervous about an official solve that I've ever been during this... I thought I was going to have to finish on 30 until I realised that I wrote the first insertion wrong (and it cancelled an extra move!), so I checked for the 3c insertion, and I was really relieved :)


Here are some other things I found on all the scrambles, the first two in particular

#1
B' L' made two squares, which hardly anybody noticed for some reason...
From here, (L' D' U2) U2 makes a 6 move 2x2x3, but I couldn't find any good continuations

But adding a (U) before (L' D' U) makes some pair, then fixing the pseudo on the normal scramble maes another square!
From there, you can do 2 more moves to F2L-1 in 9 moves :)
B' L'
(U L' D' U)
U2 R' (R2) / U2 R2 (R)

There's isn't much from then on, besides a 16 to 5c - B2 U' L' B' L U B' - that I didn't have time to insert, and a 16 move F2L with a not great LL.

#2
F' R F/F' solved B/G EO with 2 pairs, but I didn't find anything great from there

I found my R' U L square start right at the beginning, so I didn't find much else different.

Here's a backup 21 to 3c:
R' U L //square
(F2 R' B2 R) //another square
(F2 U2 F2) //2x2x2
(B2 D B2) // XXcross
(R2 F' R2 F) //F2L-1
(U R U' R') //leave 3c

I played around with stuff on the inverse, and saw that (U2 F2) made lots of pairs /pseudosquares
Then I found this cool skeleton
(U2 F2)
(D' B U') //1x2x3
(F R) //2x2x2
(U2 R B R' L U') //leave 3c3e+1flipped edge
I don't think I found anything though

Also this:
R' U L (U2 F2)
(D' B R B)
L' R' D2 L D' R2

R' U R' D2 @ L D' & R2 B' R' B' D F2 U2
@L B' L' F D' B' D B F' //22 to 3c
&R' B' R F' B D B' D' F //22 to 3c

#3
(D2 U' B2) U2 is a pretty nice 2x2x2
Then U' makes a square, so possible 2x2x2s + squares include (D2 U' B2) U' F' U F / U' F2 U F
I didn't really find much after this, so I abandoned it after 15 mins or so (in hindsight a little too long spent on it)

I played by around with EO starts, including F' (L F')
Which led to (D) D2 F2 making a 6 move EO 2x2x2
Nothing much after this though :/

For my actual solution, I could have done
(L2 D2 L)
F D F
(D' F' D2) for the same 2x2x2, but this broke up some pairs, so I didn't use it

I also had a 31 move backup solution:
(D2 U' B2)
U' D' F2 U' F2 (F') // the D' is an inserted move to make some pairs
(D2 R F D' F') //F2L-1
(R D' R' D R2 B R2 B') //F2L
(F' R' F R F D' F' D R2) // LL

Very happy with all of this :D
Only one person got one solution better than your worst attempt. Congrats on the win/top 14 in the world! :)
 

guysensei1

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Who needs insertions and niss when you can linear and PLL skip lol
U L2 U F R L2 B R B2 L' R' U2 D L' U B L' U' B2 F'

R' B D U L' B2 D F'//pseudo 223+preserve pair (8/8)
D R' D2 F'//F2L-1 (4/12)
R U' R2 U F R2 F'//F2L (7/19)
B R2 B' D2 F D F' D//LL (8/27)

EDIT: dammit missed a 24

R' B D U L' B2 D F'//pseudo 223+preserve pair (8/8)
D R' D2 F'//F2L-1 (4/12)
(R2 U' R U F R F' R)//3E (8/20)

R' * B D U L' B2 D F' D R' D2 F' R' F R' F' U' R' U R2

*= R L' D F D' R' L B D' B' cancels 6, giving 24
 
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