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The reconstruction thread

qqwref

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I figured it would be useful to have a megathread for this. We can post requests for reconstructions (of WR solves and the like), cool reconstructions we've done, techniques, and so on.

A few useful links to start off with:
- Lucas Garron's reconstruction index
- Cube Explorer to track stickers when you don't have a scramble
- alg.garron.us to make sure your sequence solves the puzzle
 

qqwref

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It took an lot of work and trial/error (even the high quality video was pretty grainy/blurry on the cube section, and there were reflections on the stickers, and fingers and subtitles in the way), but:

scramble: U L2 D' B2 U' R2 B2 F2 D' F2 L2 R2 F R2 D L2 R2 B' L' D' R F'

inspection: x2 y
FL corners + 1 edge: D' R u D R' y' D' R D R'
FL center + 2nd edge: y D r' E' L
CLL: z2 U y l D R' z' R' x z' r' R2 U2 z D R2 D2
FL 3rd edge: R' l' z M D2 M'
LL 1st edge: z2 y R z' M z R'
LL 2nd edge: z' r' L' z D R' E R
LL 3rd edge: U' u' R E' R'
LSE hax: u R' E' R E2 R E R'
centers: R2 E E' r2 E M2 E'

52ish slice moves = 2.26 tps

http://alg.garron.us/?alg=x2_y D-_R..._B2_F2_D-_F2_L2_R2_F_R2_D_L2_R2_B-_L-_D-_R_F-
 
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It took an lot of work and trial/error (even the high quality video was pretty grainy/blurry on the cube section, and there were reflections on the stickers, and fingers and subtitles in the way), but:

scramble: U L2 D' B2 U' R2 B2 F2 D' F2 L2 R2 F R2 D L2 R2 B' L' D' R F'

inspection: x2 y
FL corners + 1 edge: D' R u D R' y' D' R D R'
FL center + 2nd edge: y D r' E' L
CLL: z2 U y l D R' z' R' x z' r' R2 U2 z D R2 D2
FL 3rd edge: R' l' z M D2 M'
LL 1st edge: z2 y R z' M z R'
LL 2nd edge: z' r' L' z D R' E R
LL 3rd edge: U' u' R E' R'
LSE hax: u R' E' R E2 R E R'
centers: R2 E E' r2 E M2 E'

52ish slice moves = 2.26 tps

http://alg.garron.us/?alg=x2_y D-_R..._B2_F2_D-_F2_L2_R2_F_R2_D_L2_R2_B-_L-_D-_R_F-

What method did he use?
 

qqwref

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As far as I can tell the method is roughly:
- first layer corners and then center, try to add in an edge if you see it
- last layer corners in one step
- insert first layer edges until 3 are done
- use the keyhole in the first layer to insert 3 last layer edges
- solve the last 6 edges and centers (not sure what his strategy here is)
 

Kirjava

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This is awesome, thanks a lot for doing it.

CLL: z2 U y l D R' z' R' x z' r' R2 U2 z D R2 D2

Equivalent to F U R U' R' F' y R2 U2 R U2 R2

pretty damn cool

I would guess he was just trying to solve the two remaining edges in each layer, and he just got an easy E-slice case.

I agree. The 'LSE hax' is a Roux trick for solving UL/UR edges and orientation in one, but I think it's unlikely he used the orient -> permute technique and he probably just did UL/UR then midges.

You could always reconstruct his other solves for more info :p
 

qqwref

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Feliks's 2.12 WR average on 2x2:

1. 2.38 U2 F' U2 F U2 R' F R' U'
inspection: x' z2
FL: R' U R U' R' U
CLL: R U2 R' U' R U' R'

2. 1.77 U' F' U2 F2 U' F R' F2 U
inspection: y'
FF: R' U' R2 U'
EG2: R U' L' U R' U' R' U2 R2

3. (1.75) U2 R' F' R U2 R F2 R2
inspection: y x
FL: R' U R2 U R2'
CLL: F R U R' U' R U R' U' F' U

4. 2.21 U' F' U R F2 U' F R2 F'
inspection: x y
FL: U' L' U R U' R' L' U L
CLL: U2' R U R' U R U' R' R U' R'

5. (2.46) R2 U R U F2 U2 R2 F'
inspection: y'
FL: R U2 R' U R U' R' U
CLL: U' R U' R' U2 R L U' R' U L' U'

You could always reconstruct his other solves for more info :p
Yeahhhhh no thanks.
 
Last edited:

qqwref

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More or less that. I use Cube Explorer and fill in stickers on an empty cube until I know enough. I always try to find as much of the initial scramble as possible, but sometimes I can't get it all from the start. In that case I'll play along with a real cube and see if any previously unknown stickers come into view as the solution is executed. Once I have the starting state (and, if it's 2x2 or 3x3, a scramble to go with it), I can watch what's going on and do moves on my own cube to try to match what I can see at any given time. It's not always possible to figure out what moves are being done just by watching the hands and cube twist.
 

DavidWoner

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Reconstruction of Giovanni's 7.75 fullstep NR

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


z' y2 D2 R' F
y' U' R U2 R' U' R U R'
y R U R' U' R U' R' U2 R U' R'
y R' U R
U2 R U R' U' R U R'
F R U R' U' F'
U L U2 L' U2 L F' L' U' L U L F L2 U

54 moves / 7.75 = 6.97tps

Second pair was hard to find because I couldn't tell he did that many moves :p

I'd like to see a reconstruction of Piti's 7.68.
 

qqwref

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Got Piti's solve. Neither of the vids had a good enough view of the scrambled cube, so it took a few tries to get the right scramble.

scramble: F2 R2 D R D L2 R F2 L D F2 D2 R F L D' U' B

inspection: y' x'
cross: r' F' D
F2L1: U' R' U' R2 U R'
F2L2: U R' U2 R U R' U2 R
F2L3: y' U y' U R' U' R y U' L' U L
F2L4: U' R U2 R' U2 R U' R'
OLL: R' U' F U R U' R' F' R
PLL: U' R2 U R U R' U' R' U' R' U R' U

54 moves (canceled) / 7.68 = 7.03 tps
 

hr.mohr

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A megaminx reconstruction will be quite hard to do. In this case we have the scramble, but who can really say if it was scrambled correctly. The notation will also be a b*tch to do.

The scramble was either:
R-- D++ R-- D++ R++ D-- R++ D-- R++ D++ U R++ D++ R-- D-- R-- D++ R-- D++ R-- D-- U' R-- D++ R-- D++ R-- D-- R++ D-- R-- D++ U R-- D++ R-- D-- R-- D++ R++ D-- R++ D-- U' R++ D-- R-- D++ R++ D++ R++ D++ R-- D++ U R++ D++ R-- D-- R-- D-- R++ D++ R++ D-- U' R-- D-- R++ D++ R-- D-- R-- D++ R-- D++ U

or

R++ D++ R++ D-- R++ D-- R++ D-- R++ D-- U' R++ D-- R-- D-- R++ D++ R++ D-- R-- D++ U R++ D-- R-- D++ R-- D++ R-- D-- R++ D-- U' R++ D++ R++ D-- R++ D++ R-- D++ R-- D++ U R++ D-- R++ D-- R++ D-- R-- D++ R++ D-- U' R++ D-- R++ D-- R-- D++ R++ D-- R-- D-- U' R++ D-- R++ D-- R++ D-- R++ D++ R++ D-- U'

As I can't remember which group Simon was in in the final.
 
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