• Welcome to the Speedsolving.com, home of the web's largest puzzle community!
    You are currently viewing our forum as a guest which gives you limited access to join discussions and access our other features.

    Registration is fast, simple and absolutely free so please, join our community of 30,000+ people from around the world today!

    If you are already a member, simply login to hide this message and begin participating in the community!

The reconstruction thread

Joined
Dec 18, 2007
Messages
7,830
Likes
27
Location
a <script> tag near you
WCA
2006GOTT01
YouTube
qqwref2
Thread starter #1
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
 
Joined
Dec 18, 2007
Messages
7,830
Likes
27
Location
a <script> tag near you
WCA
2006GOTT01
YouTube
qqwref2
Thread starter #5
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-
 
Joined
Nov 8, 2010
Messages
5,472
Likes
40
Location
near Ottawa, Canada
WCA
2010CANT02
YouTube
antoineccantin
#6
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?
 
Joined
Dec 18, 2007
Messages
7,830
Likes
27
Location
a <script> tag near you
WCA
2006GOTT01
YouTube
qqwref2
Thread starter #7
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

Colourful
Joined
Mar 26, 2006
Messages
6,122
Likes
38
WCA
2006BARL01
YouTube
snkenjoi
#9
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
 
Joined
Dec 18, 2007
Messages
7,830
Likes
27
Location
a <script> tag near you
WCA
2006GOTT01
YouTube
qqwref2
Thread starter #10
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:
Joined
Dec 18, 2007
Messages
7,830
Likes
27
Location
a <script> tag near you
WCA
2006GOTT01
YouTube
qqwref2
Thread starter #12
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

The Punchmaster
Joined
May 7, 2008
Messages
3,937
Likes
5
Location
Kansas City, MO, USA
WCA
2008WONE01
YouTube
vault312
#15
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.
 
Joined
Dec 18, 2007
Messages
7,830
Likes
27
Location
a <script> tag near you
WCA
2006GOTT01
YouTube
qqwref2
Thread starter #16
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
 
Joined
Feb 20, 2008
Messages
447
Likes
1
Location
Odense, Denmark
WCA
2007CHRI02
YouTube
hrmohr
#20
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.
 
Top