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(YouTube)   What do you get when you combine an expert Rubik's cube solver, a 21x21 Rubik's cube, and 6 hours 19 minutes and 19 seconds?   (youtube.com) divider line
    More: Cool  
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717 clicks; posted to STEM » on 05 Dec 2021 at 10:35 PM (6 weeks ago)   |   Favorite    |   share:  Share on Twitter share via Email Share on Facebook



21 Comments     (+0 »)
View Voting Results: Smartest and Funniest
 
2021-12-05 8:09:29 PM  
That was neat. I put it on 2x speed. It was the only way.
 
2021-12-05 8:30:07 PM  
A virgin?
 
2021-12-05 8:54:13 PM  
Back in high school and college, I could knock out the original easily but I have no memory of how now. This video just scares me.
 
2021-12-05 10:48:04 PM  
the hell outta there.
 
2021-12-05 11:10:11 PM  
Even turning that thing looks difficult.
 
2021-12-05 11:53:10 PM  
I could hardly believe it, but this is a commercially available cube. Costs about $1500, though.

I own a 9x9x9 cube. I can solve it in about an hour and 10 minutes. A 21x21x21 would probably take me three days or so.
 
2021-12-06 2:07:26 AM  

The Reverend Sam Hill: I could hardly believe it, but this is a commercially available cube. Costs about $1500, though.

I own a 9x9x9 cube. I can solve it in about an hour and 10 minutes. A 21x21x21 would probably take me three days or so.


After 4x4 they get so unwieldy that I've never been overly tempted to learn to solve them. One of those stickerless 3x3s is just pleasant to fiddle with.
 
2021-12-06 2:11:26 AM  
Fixed Cable?
 
2021-12-06 3:15:08 AM  

edmo: Back in high school and college, I could knock out the original easily but I have no memory of how now. This video just scares me.


I had the solution in print and never managed it, but people can do it one handed without looking in under a minute, so clearly there's a set solution independent of the colored stickers
 
2021-12-06 3:36:54 AM  
21x21 did not a cube make, subby.
 
2021-12-06 3:51:41 AM  

ArcadianRefugee: 21x21 did not a cube make, subby.


Actually, you might as well write the YouTuber too, in the YouTube comments...

Fark user imageView Full Size
 
2021-12-06 4:21:37 AM  

leeksfromchichis: edmo: Back in high school and college, I could knock out the original easily but I have no memory of how now. This video just scares me.

I had the solution in print and never managed it, but people can do it one handed without looking in under a minute, so clearly there's a set solution independent of the colored stickers


The people who do it without looking are allowed to memorize the cube first.  It is still impressive, but doing it blind without ever seeing the cube would not be possible outside of random chance.
 
2021-12-06 4:23:45 AM  

Kris_Romm: ArcadianRefugee: 21x21 did not a cube make, subby.

Actually, you might as well write the YouTuber too, in the YouTube comments...

[Fark user image image 425x468]


D'oh! Didn't even see the in-video caption, just the actual caption.

Silly people.
 
2021-12-06 5:30:05 AM  

omnimancer28: leeksfromchichis: edmo: Back in high school and college, I could knock out the original easily but I have no memory of how now. This video just scares me.

I had the solution in print and never managed it, but people can do it one handed without looking in under a minute, so clearly there's a set solution independent of the colored stickers

The people who do it without looking are allowed to memorize the cube first.  It is still impressive, but doing it blind without ever seeing the cube would not be possible outside of random chance.


Really?  I always thought it was some math trick
 
2021-12-06 6:41:26 AM  
Meh, wake me up for the video of them solving a Rubik's Hypercube.
 
2021-12-06 6:49:29 AM  
Star rubics cubes are even more evil. Probably beyond the abilities of all the youtubers though since you never see them going after those
 
2021-12-06 9:55:04 AM  

omnimancer28: leeksfromchichis: edmo: Back in high school and college, I could knock out the original easily but I have no memory of how now. This video just scares me.

I had the solution in print and never managed it, but people can do it one handed without looking in under a minute, so clearly there's a set solution independent of the colored stickers

The people who do it without looking are allowed to memorize the cube first.  It is still impressive, but doing it blind without ever seeing the cube would not be possible outside of random chance.


UHF - is this it?
Youtube TYM4QKMg12o
 
2021-12-06 10:28:59 AM  
Just wondering if anyone ever made a Rubric Cube. Scoring guides instead of colors. It'd probably be super rad.
 
2021-12-06 10:46:39 AM  

leeksfromchichis: omnimancer28: leeksfromchichis: edmo: Back in high school and college, I could knock out the original easily but I have no memory of how now. This video just scares me.

I had the solution in print and never managed it, but people can do it one handed without looking in under a minute, so clearly there's a set solution independent of the colored stickers

The people who do it without looking are allowed to memorize the cube first.  It is still impressive, but doing it blind without ever seeing the cube would not be possible outside of random chance.

Really?  I always thought it was some math trick


There are math tricks for reorienting stuff, but there's no ultimate pattern that lets you solve it without knowing where everything is. They always need some way to check the starting state.
 
2021-12-06 1:23:23 PM  

The Reverend Sam Hill: I could hardly believe it, but this is a commercially available cube. Costs about $1500, though.

I own a 9x9x9 cube. I can solve it in about an hour and 10 minutes. A 21x21x21 would probably take me three days or so.


I had one of the original 3x3x3 ones when they first came out, and never did figure out how to solve the damn thing.  I ended up pulling an Alexander the Great and just took it apart with a screwdriver and put it back together correctly.
 
2021-12-06 1:26:01 PM  

edmo: Back in high school and college, I could knock out the original easily but I have no memory of how now. This video just scares me.


Yeah, I could do it long ago but I've forgotten.

Note, however, that the big cubes aren't really much harder than the small ones.  If you can solve a 3 you can solve any odd cube, if you can solve a 4 you can solve any even cube.  The same patterns apply, just solve one layer at a time.

Now, if you want to see wild, there was a woman on Fool Us recently with a fairly high order cube.  She had Allison pick an apparently unknown card, then fiddled with the cube to make it display the number and suit.  They were amazed at the memorization that must have gone into it but busted her anyway--the only actual magic was figuring out what card Allison had picked.  Using the cube to reveal it was incredible skill but not magic.
 
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