Rubik's Cube

Ive tried them and solved it once over like a year by playing with it when I was bored. I have no idea how I did it though. Call me stupid if you like, but I even got instructions from the net on how to solve one and ended up more confused than I was when I started.

My problem with Rubics cubes is that the colors were just stickers. I never encountered one that I couldn't find proof that the colors had been rearranged at some point. And since everybody apparently thought too highly of themselves to just cheat right to a solution, the cube was invariably left in an unsolveable state. Before anybody points out the obvious, they truly were unsolvable, I'm not just bitter because I couldn't solve them. For instance, good luck solving a cube with no red sticker on a center square.

In short, I was never given the opportunity to solve one when I had the patience to do so. Now, I don't see the point in such wastes of time, so I wouldn't bother even if provided the opportunity.

CM

Quote:

Original post by Conner McCloud My problem with Rubics cubes is that the colors were just stickers.

Not on all of them. I have one made of colored plastic...impossible to cheat.

I also saw a 5x5x5 cube...good luck on that.

There used to be two guys at our school, both identical twins, who could each do a Rubics in under a minute-twenty. We used to make them race. Eventually one of them showed me the steps to do it (well, one way to do it). Takes me about 15 minutes. You just have to know the procedure, really. Nothing tricky.

Seen a guy do it in 35 secs... He said he could do it in like 25 seconds.. Once the light went out when he was halfway through and he still fixed it in less than a minute...

The guy who holds the world record in time for beating a cube, has also done a 20something x 20something cube, or so I remember reading at one time, I think it took him around 7 months.

I took a one-month course in college about the Rubik's cube. In addition to learning how to solve it we learned the mathematics behind it (abstract algebra and group theory).

My best time for the 3x3x3 is 69 seconds. I went to the National Cube championship at Caltech last year (not to participate, just to watch). Those people are insane, especially when they get to the 4 and 5 cube.

there is also an automated solver built with lego and it solves cubes in 20 mins.

Quote:

Original post by Conner McCloud My problem with Rubics cubes is that the colors were just stickers. I never encountered one that I couldn't find proof that the colors had been rearranged at some point. And since everybody apparently thought too highly of themselves to just cheat right to a solution, the cube was invariably left in an unsolveable state. Before anybody points out the obvious, they truly were unsolvable, I'm not just bitter because I couldn't solve them. For instance, good luck solving a cube with no red sticker on a center square.

I have a rubix cube on my computer desk that fits that exact description. It's missing one of the stickers and I suspect someone messed with them awhile ago.

I keep it there cause I like to shuffle it when I'm thinking.

probably not as fast as some of the ones you guys mentioned, but interesting nontheless...

http://www.compfused.com/directlink/641/

Quote:

Original post by DukeAtreides076 Quote: Original post by Conner McCloud My problem with Rubics cubes is that the colors were just stickers. Not on all of them. I have one made of colored plastic...impossible to cheat.

You can usually break them apart and put them back together again in a different arrangement.

John B

Quote:

Original post by _goat There used to be two guys at our school, both identical twins, who could each do a Rubics in under a minute-twenty. We used to make them race. Eventually one of them showed me the steps to do it (well, one way to do it). Takes me about 15 minutes. You just have to know the procedure, really. Nothing tricky.

So, what is it?

How to solve a rubik's cube

And here is a guy that did a 20x20x20 cube in 4 hours 24 minutes 54 seconds.

Crazy.... But it is all algorithms, that I don't bother learning :)

I got interested in them for awhile and made a Rubik's Cube program for a class. I allowed it to be expandable from 2 cubed up to > 20 (although it becomes hard to see)

Ex: 30x30x30


I could solve it in about a minute and a half when I remembered the algorithms I used.

Quote:

Original post by H_o_p_s And here is a guy that did a 20x20x20 cube in 4 hours 24 minutes 54 seconds.

if it is a cube, do you really need to say more than 20x? aren't the other two 20's and the extra x redundant and useless? Can you make a cube that isn't the same size in all directions? ;)


Yeah, I've never completed one,... just do 3 of the six sides, ;)

Quote:

Original post by Talroth if it is a cube, do you really need to say more than 20x? aren't the other two 20's and the extra x redundant and useless? Can you make a cube that isn't the same size in all directions? ;)

It's short for a 20x20x20 Rubik's Cube. People who are on the rubik's cube websites just call it a cube. example: "How fast can you complete a cube?" Or maybe I'm just pulling this crap out of my ass, but it makes sense to me [grin]

So, is there a way to test a given rubik's cube for solvability without doing a thousand iterations and getting nowhere?

Quote:

Original post by krikkit So, is there a way to test a given rubik's cube for solvability without doing a thousand iterations and getting nowhere?

I'm sure if you test to make sure all the color combinations exist, then it would be solvable (if you mean that question as in someone moving the stickers around).

If you know the cube hasn't been tampered with there are lots of programs that will solve it in the shortest moves for you.

Guy solves Rubik's Cube BLINDFOLDED!