# 105x105x105 Rubik's cube solve attempt

Discussion in 'General Speedcubing Discussion' started by soup, Mar 25, 2013.

Welcome to the Speedsolving.com. You are currently viewing our boards as a guest which gives you limited access to join discussions and access our other features. By joining our free community of over 30,000 people, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

1. ### soupMember

303
0
Mar 12, 2012
Top Kek
s16269
I'll attempt to solve a 105x105x105 cube over the course of a few weeks. I'm confident that it'll be done within roughly 200 ~ 250 hours of solve time. I'll be live feeding my attempt, as well as recording via hypercam to upload a time-lapse. Hopefully, this will set a record for largest cube ever solved by hand. The current largest cube ever solved by hand I'm aware of is 100x100x100.

Live feed is here

2. ### antoineccantinMember

5,472
20
Nov 8, 2010
WCA:
2010CANT02
antoineccantin

Wut.

4. ### AkiroMember

187
0
Mar 25, 2012
WCA:
2012GABO01
Since it is on a computer...you should solve it with your feet...
Louis Cormier style!

^^

6. ### uniactoMember

938
0
Aug 6, 2012
Seattle, Washington
WCA:
2013KWON01
uniacto
Good luck.

7. ### DuffyEdgeMember

831
1
Jun 24, 2012
Exeter, UK
WCA:
2013CRON01
DuffyEdge9
That'll take a while

828
3
Sep 17, 2009
New Orleans, LA
4EverTrying
About how many hours of solve time have you spent solving this 105^3 so far? I made an approximation formula (it gives an estimated "optimal" official average solve time in seconds for a cube of size n...it's based on the current official 3x3x3 Avg. WR) while back, and it gives an average solve time for the 105^3 to be approximately 1220 hours, which is over 7 full (24 hours a day) weeks of solve time. I'm just curious.

EDIT:
Okay, so you're just beginning now (for some odd reason I didn't catch that). I guess well see. No pressure, just have fun!

Last edited: Mar 26, 2013
9. ### soupMember

303
0
Mar 12, 2012
Top Kek
s16269
k.. beginning now.

10. ### chrissyDMember

711
0
Jun 2, 2011
Newcastle, UK
WCA:
2009DICK02
chrissdkn
I just realised the actual size of the thing when I went on the live stream

11. ### uniactoMember

938
0
Aug 6, 2012
Seattle, Washington
WCA:
2013KWON01
uniacto

that thing is gargantuan.

12. ### qqwrefMember

7,832
17
Dec 18, 2007
a <script> tag near you
WCA:
2006GOTT01
qqwref2
Your formula is O(n^4/log(n)). That is probably because you tried to fit records on real times, and real-cube times have factors such as a decrease in cube stability and turnspeed as the number of layers increases. (Also, you're overfitting the data... a LOT ) This is unrealistic for computer cubes because as the number of layers increases the difficulty of turning the cube stays the same, and in fact, the difficulty of finding pieces peaks at some point - essentially, it becomes impossible to just scan the cube and find the right piece, so you have to switch to more local guess-and-check type strategies which pretty much take a constant amount of time (relative to cube size). What I'm saying is that the time taken per piece increases for a bit, and then more or less levels off, as cube size increases. The number of pieces is O(n^2) so there you go.

I know soup took ~16 hours for the 40x40x40. That works out to about 6.31 seconds per piece. At that speed he would finish the 105x105x105 in 113.7 hours. Actually, I think he's being quite generous with his time estimate, but we'll see!

13. ### VeerexxMember

I still cant believe you are going to do this :3

1,299
11
Apr 6, 2011
Iowa, USA
WCA:
2011MIKE01
rayquazapwn88
Good luck! Wow, that is a monstrous cube.

15. ### ben1996123Banned

May 17, 2009
Ponyville
WCA:
2009WHIT01
ben1996123
1 hour 42 minutes, 8/103 rows of 1 centre solved = 12:45 per row.

= 129:37:30 to finish centres.

16. ### qqwrefMember

7,832
17
Dec 18, 2007
a <script> tag near you
WCA:
2006GOTT01
qqwref2
You assumed he had to solve the last center, didn't you?

4,102
76
Apr 5, 2006
Atlanta, Georgia
WCA:
2003HARD01
That is so cool! Bookmarked! Good luck!

18. ### That70sShowDudeMember

Sep 8, 2008
Emmaus, PA
WCA:
2010KOTC01
FitCuber65
dear gawd, good luck

Dec 24, 2012
Chennai
WCA:
2013PARE01