[Help Thread] FMC Discussion

[tseitsei]

Nice 29 move solve for speedsolving weekly forum comp sub-30 is still always a pleasant surprise for me

Spoiler

1. U' F U2 D F U' R F U2 B L2 F2 B2 L' U2 L2 D2 L F2 L' D2

L F' R U' [2] D' R2 //2x2+free pair
L2 F [1] L' // square
U' F2 L F L2 //another square
U2 L2 F' // finish F2L-1 and EO
D' L' D L' //solve edges leaving corner 3-cycle and one twisted corner

[1]= [F' : L' B' L] insert at [1] and 5 moves cancel
[2]= [R : D' L2 D] insert at [2] and 3 moves cancel when you switch places of consecutive L2 and R2 in the solution to get L2 next to L

 

[2180161]

My first FMC solve, It is REALLY bad. But i dont use premoves or anything
Scramble: D2 F2 L' D' B' U2 B' R L' F' D2 F' R2 B R2 U2 D2 L2 B' R2
F D' L' D R U2 R' U' L' U2 L F' L' U Rw' U2 Rw U BU' B' UR U2 R U B U2 B' U F R U' R' U2 B U B' U R U F' U' z' R UR'U R U'R'U'R'F RF' R-Perm
So, what was my first issue with my solve. BTW its about 68 HTM

 

[TDM]

So, what was my first issue with my solve.

first issue: you used CFOP, which is one of the least efficient methods you can do.
second issue: your solution does not solve the cube, which is a bit of a problem, since solving the cube is the goal of the event.
third issue: you didn't even write out all the moves, which you have to do if you don't want a DNF

 

[2180161]

Ok here is another one,and it is much better than my first, and I found it in about 30 minutes I think, I didnt check the time, Im just working on the solutions.
Scramble: D2 B D2 F' U2 F2 L2 F L2 R2 F U' L D L2 B R U2 R F

So... I dont know how rotations are counted, but I rotate a LOT.

y2 F' B2 D L B L D B' D2 //2x2

L' U D' L D L U' L'U L2 F' U' R' F2 L' R // F2L-1

y2 U' R U2 R' F' U' F // I dont know what that step would be called, solving 2/3 of my U side

U2 B' U R' U' B' R B U R U2 B // Solving the cube

Final Solution: y2 F' B2 D L B L D B' D2 L' U D' L D L U' L' U L2 F' U' R' F2 L' R y2 U' R U2 R' F' U' F U2 B' U R' U' B' R B U R U2 B
Total Moves (HTM): 44 moves HTM MUCH BETTER THAN LAST TIME!

 

[guysensei1]

Ok here is another one,and it is much better than my first, and I found it in about 30 minutes I think, I didnt check the time, Im just working on the solutions.
Scramble: D2 B D2 F' U2 F2 L2 F L2 R2 F U' L D L2 B R U2 R F

So... I dont know how rotations are counted, but I rotate a LOT.

y2 F' B2 D L B L D B' D2 //2x2

L' U D' L D L U' L'U L2 F' U' R' F2 L' R // F2L-1

y2 U' R U2 R' F' U' F // I dont know what that step would be called, solving 2/3 of my U side

U2 B' U R' U' B' R B U R U2 B // Solving the cube

Final Solution: y2 F' B2 D L B L D B' D2 L' U D' L D L U' L' U L2 F' U' R' F2 L' R y2 U' R U2 R' F' U' F U2 B' U R' U' B' R B U R U2 B
Total Moves (HTM): 44 moves HTM MUCH BETTER THAN LAST TIME!

Try not to use rotations. It makes your solution look weird.

 

[Tim Major]

2nd scramble Canberra Autumn
http://i.imgur.com/yPoHuAu.jpg

Feliks got 25, Jay got 27. So many starts on normal and especially reverse scramble but I couldn't find any good continuations. The 36 mover was my safety solution, but I spent the last 30 mins trying other solutions instead of an insertion for it.

Feliks' solution:
B' L' U2 B2 U' L' F2 L' F' D L D' L B' L' B R' D2 R B D R D' R' B'

 

[guysensei1]

2nd scramble Canberra Autumn
http://i.imgur.com/yPoHuAu.jpg

Feliks got 25, Jay got 27. So many starts on normal and especially reverse scramble but I couldn't find any good continuations. The 36 mover was my safety solution, but I spent the last 30 mins trying other solutions instead of an insertion for it.

Feliks' solution:
B' L' U2 B2 U' L' F2 L' F' D L D' L B' L' B R' D2 R B D R D' R' B'

Thats a really clever solution!

 

[Tim Major]

Thats a really clever solution!

How? It's just obvious blocks, then messing around with different slotting to get a skip lol

 

[TDM]

So... I dont know how rotations are counted, but I rotate a LOT.

Rotations count as 0 moves, but don't do them. Firstly, the person counting your moves might think they count as 1, and secondly, you're more likely to miss possible cancellations. And thirdly, you're more likely to DNF if you rotate the wrong way by accident.

y2 F' B2 D L B L D B' D2 //2x2

y2 F' B' R B U B2 is fewer moves

The rest of your solution is weird not sure what to say about it, other than practise more, use as much of the time as you can, and try to be more efficient in your blockbuilding. Efficiency is important.

 

[Cubenovice]

2nd scramble Canberra Autumn
http://i.imgur.com/yPoHuAu.jpg

Feliks got 25, Jay got 27. So many starts on normal and especially reverse scramble but I couldn't find any good continuations. The 36 mover was my safety solution, but I spent the last 30 mins trying other solutions instead of an insertion for it.

Feliks' solution:
B' L' U2 B2 U' L' F2 L' F' D L D' L B' L' B R' D2 R B D R D' R' B'

Long time since I cubed but what the heck:

Random blockbuilding
B' D2 L' D R' U2 B2 U'
L' F . L F' D F pseudo F2L 14
R' B' L B' L' B2 R D' fat anti-sune leaves 3 corners and undoing of pseudoness
F - undo pseudoness

at . insert F R2 F' L F R2 F' L' to cancel 4 moves

final solution:
B' D2 L' D R' U2 B2 U' L' F2 R2 F' L F R2 F2 D F R' B' L B' L' B2 R D' F = 27 HTM

 

[2180161]

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

U F' R D' F B R'U R D //2x2 (10/10)

U' F2 r U2 r U2 F' L F//F2L-1 (9/19) Already not optimal

U' F' U F U' R U R'// Random blockbuilding (8/27)

U R U' R' F B' U' R' B' R U F' U' B U R B// Solving the cube (17/44)
44 Total Moves,
FINAL SOLUTION:U F' R D' F B R'U R D U' F2 r U2 r U2 F' L F U' F' U F U' R U R' U R U' R' F B' U' R' B' R U F' U' B U R B

Edit:
I lost the scramble but... I plugged it into cube512qtm, and just reversed the solve. So hopefully it is sufficient because I was going to speedsolve but said "ooh this look nice."
Scramble: R2 B2 D U2 F2 D2 U' L' F' U F U R' D B U' B' L F' R B
R B' L U L' U' D2 R' D R //2x2 (10/10)

x2 L2 F2 L U B' U B U' R U R' F //F2L -1 (12/22) definitely not optimal at this point

F' U B U B' U' B' R B R' U F U' R2 U' L' U' R' U' L U2 R'// F2L (22/44)

F R D2 L' U F2 U' L D R2 D F' //LL (12/66)

very bad compared to my previous two. 66 moves HTM
D:

 

[Kit Clement]

Kind of want to cry. Found a 22 to L3C on the weekly this week, then found this 17 to L3C skeleton a few minutes after the hour.

http://mf.qiyuuu.com/cube/if/5408f1b1c5b5aad6362d440c8e901ad5.cube (spoilers, of course)

 

[Jaysammey777]

Had a miracle at this competition last weekend. 1st FMC in 6 months and my PB

Peach State 2015 Competition, 3x3x3: Fewest Moves Round 1:

Scramble: F2 R D2 L F2 R B2 U2 R D F D’ R’ D B2 L’ R’ B2 L’ B’

Solution:
2x2x2: L D2 F B’ R’ (5/5)
2x2x3: F2 L U’ L’ B’ U’ B (7/12)
Add premove: U
F2L - 1 pair: U’ (1/13)
Last pair: F’ U’ F2 U F’ L F L’ (8/21)
OLL: L F L’ F L F’ L’ F’ L’ U L U’ (12/33)
Undo Premove: U (1/34)

Cancelations: Last pair – OLL: F L’ L F = F2 -3 34-3 = 31
Undo premove U’ U = -2 31-2 = 29

Solution: L D2 F B’ R’ F2 L U’ L’ B’ U’ B U’ F’ U’ F2 U F’ L F2 L’ F L F’ L’ F’ L’ U L
29 HTM

 

[G2013]

Sub 30! Congratulations! I must do FMC again.... It has been a long time since my last solve ;/

 

[AustinReed]

OK, I'm having issues with insertions. I know how to do comms. My issue is more of a hardware thing. I don't like wasting stickers on FMC, so what can I do that's comp legal that makes it easier to track the stickers that need to be switched? I tried writing down the cycle that I need to do on a piece of paper and tracking those through the solve, but it takes me way too long and it's frustrating.

I assume that bringing in a "blank" cube with 3 "written in stickers" like this isn't comp legal.

 

[EMI]

^ One could argue whether it's legal. It's definitely legal to use some sort of stickerless cube and a sheet of marked stickers (not cube stickers but little paper stickers that you can write on), though.

 

[tseitsei]

OK, I'm having issues with insertions. I know how to do comms. My issue is more of a hardware thing. I don't like wasting stickers on FMC, so what can I do that's comp legal that makes it easier to track the stickers that need to be switched? I tried writing down the cycle that I need to do on a piece of paper and tracking those through the solve, but it takes me way too long and it's frustrating.

I assume that bringing in a "blank" cube with 3 "written in stickers" like this isn't comp legal.

I just use small pieces of tape

 

[Prakhar]

I use the sticky side of postits. Cheap and doesn't damage cube stickers

 

[WayneMigraine]

Does anybody have any tips for finding insertions for last three corners cases where you have three twisted corners?
On this scramble: L2 U' B2 L2 B2 U2 F2 R2 U B2 L' U' B' U B2 L2 B' D' B2 D'
I've come up with the 23 move skeleton: U F2 R D' R2 B2 D B' L2 B' D2 L' D' L2 D B D L D' L' R D' R', but I'm not sure how to keep track/number the pieces for an insertion case where I need to do a 3-cycle to move the corners out of place and then permute them back into their positions with the correct orientation.
I used an insertion finder to come up with this solution, but am confused as to how it found it:
U F2 R D' R2 B2 D B' L2 B' D2 L' D' L2 D [@1] B D L D' L' R D' R'
Insert at @1: U B D2 B' U' B D2 B'
After the 1st insertion: U F2 R D' R2 B2 D B' L2 B' D2 L' D' L2 D U B D2 B' U' B D' L D' L' R D' [@2] R'
Insert at @2: D R' D' L' D R D' L
Fewest moves: 32, 7 moves cancelled
The final solution: U F2 R D' R2 B2 D B' L2 B' D2 L' D' L2 D U B D2 B' U' B D' L D' L' D' L' D R D' L R'
Any help would be greatly appreciated!

 

[cubizh]

Does anybody have any tips for finding insertions for last three corners cases where you have three twisted corners?

For three corners, you can use U' B U' F U2 B2 D' R2 U D F' U' B (13 HTM). But this is usually not the best way.
The classic way to solve 3 twisted corners is to use two inserted corner commutators. The first one only needs to cycle in any way the three twisted corners (or the two twisted corners + one random corner) and will usually lead to may cancellations. Then you only need to insert a simple corner commutator in the new skeleton you have got.
To do this, you only need to draw an X or any other symbol on ...

If you are interested in what comes next or want to learn more, read the great FMC guide compiled by Sebastiano Tronto. Page 19.