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Author Topic: Rubik's Cubes
homesalad
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Icon 1 posted December 12, 2001 12:28      Profile for homesalad     Send New Private Message       Edit/Delete Post 
Okay, so this is random. When I lived in Portland, I climbed with a bunch of guys (and gals) that worked at Intel. At any rate, I went to a few parties at their houses, which we different from other parties that I had been to before. People were still drinking and chatting, but they were the only parties where people would have a beer in one hand and a mind-puzzle in the other. The converstation usually was about how the house owners had just finnished hooking up the lan, and that now all the computers (usually like 6 or 7) were properly networks using such and such a frequency, which happened to be cutting edge.

Well the point is, that at one of them one of the guys there was working a 5X5 rubiks cube, which I hadn't seen before. So it still has 6 sides, but each side has 25 squares on it. It was pretty crazy, he'd never done a 5X5 before, and in like an hour or two, (with a beer in one hand) he'd figured out the solution. I was impressed.

Then someone else was talking about a machine that a friend/professor of his had built that which soloved rubiks cubes. It had "hands" that attached to the cube, and you could tell the machine which colors are where, and it would solve the cube. I was impressed with that too.

/random thought


Posts: 220 | From: On The Road... | Registered: Oct 2001  |  IP: Logged
GrumpySteen

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Icon 1 posted December 13, 2001 07:18      Profile for GrumpySteen     Send New Private Message       Edit/Delete Post 
This is the coolest Rubik's Cube solving robot I've seen so far. You don't even have to tell it the colors of the cube... it scans with a camera and determines that for itself.

The Rubik's style cube with five pieces per edge is called a Professor Cube. You can see it and a bunch of other similar styled puzzles on this site


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Miles
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Icon 3 posted December 13, 2001 08:31      Profile for Miles   Author's Homepage     Send New Private Message       Edit/Delete Post 
You may want to file these links in the "too much information" catagory, but I found them fun.

The group theory of Rubik's cube: http://web.usna.navy.mil/~wdj/rubik_nts.htm

An efficient algorithm for solving the cube: http://www.sunyit.edu/~millerd1/RUBIK.HTM


Posts: 98 | From: Columbus, OH, USA | Registered: May 2001  |  IP: Logged
trowelblister
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Icon 10 posted December 14, 2001 07:07      Profile for trowelblister   Author's Homepage     Send New Private Message       Edit/Delete Post 
When I was a kid, I just took them apart with a screw driver, then put all the colors back together in the right order. Let's see a robot do that!
Posts: 242 | From: lansdale, pa, usa | Registered: Sep 2001  |  IP: Logged
Geordie

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Icon 1 posted December 14, 2001 08:42      Profile for Geordie     Send New Private Message       Edit/Delete Post 
quote:
Originally posted by trowelblister:
When I was a kid, I just took them apart with a screw driver, then put all the colors back together in the right order. Let's see a robot do that!

When I first read about that robot I decided I would know AI existed when a robot decided to solve the Rubik's cube using the reassembly method.


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theJacob
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Icon 1 posted December 14, 2001 19:25      Profile for theJacob     Send New Private Message       Edit/Delete Post 
When solving Rubix cubes, I've found a quick and easy solution.
I peel off the stickers and move them to possitions that would result in a correct soultion.
Cheating? Maybe. But I'm not going to sit around wasting time when thinking differently will get the job done fifty times as fast..

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Intellegnce+Laziness=Efficency


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Angry Rooster
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Icon 14 posted December 15, 2001 00:02      Profile for Angry Rooster   Author's Homepage     Send New Private Message       Edit/Delete Post 
I was always amazed at how few people figured out the reassembly method...

Certainly made me feel special though, until this thread I was the only person I knew to figure it out

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--Angry Rooster
"Eagles may soar, but roosters don't get sucked into jet engines."


Posts: 376 | From: Coeur d'Alene, ID, USA | Registered: Apr 2001  |  IP: Logged
Papa
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Icon 12 posted December 15, 2001 10:48      Profile for Papa     Send New Private Message       Edit/Delete Post 
quote:
Originally posted by Angry Rooster:
I was always amazed at how few people figured out the reassembly method...


To really bolw someone's mind, switch an edge sticker with a corner sticker of a different color, then scramble the cube and watch one of these geniuses go nuts trying to solve it.

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Papa
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Posts: 173 | From: Syracuse, NY, USA | Registered: Jan 2000  |  IP: Logged
Angry Rooster
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Icon 1 posted December 15, 2001 13:32      Profile for Angry Rooster   Author's Homepage     Send New Private Message       Edit/Delete Post 
quote:
Originally posted by Papa:
To really bolw someone's mind, switch an edge sticker with a corner sticker of a different color, then scramble the cube and watch one of these geniuses go nuts trying to solve it.


Eh, but peeling stickers is generally noticable, and lessens the life of the cube(more than taking apart even), I would just take a corner piece and turn it a notch

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--Angry Rooster
"Eagles may soar, but roosters don't get sucked into jet engines."


Posts: 376 | From: Coeur d'Alene, ID, USA | Registered: Apr 2001  |  IP: Logged
-ct-
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Icon 10 posted December 15, 2001 19:29      Profile for -ct-   Author's Homepage     Send New Private Message       Edit/Delete Post 
hehehe, reassembly WAS the fastest way to "solve" the puzzle

i can recall doing that a few times, then i got a LARGE version of the cube - it measured 6" per side - it was MUCH easier to pull apart lol

then i went looking for smaller versions and found one for a keychain
THAT was a bitch to take apart and put back together w/o breaking it, and as a result, i snapped 2 of those cubes before i perfected the process

all in all i re-assembled 10 different cubes

by pure dumb luck i managed to solve the cube the normal way only 3 out of 7 times on average

i guess i'm more of a hands-on geek than a in-the-head type
-yeah that makes sense, just like i said in the /cgi-bin hell thread [.. now that i have it working, i can rip it apart and see what makes it tick...]


Posts: 1906 | From: nowhere, man | Registered: Jan 2000  |  IP: Logged
-ct-
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Icon 1 posted December 15, 2001 19:33      Profile for -ct-   Author's Homepage     Send New Private Message       Edit/Delete Post 
oh yeah, and who remembers the rubiks' TRIANGLE? and i think there was a rubiks' ball/globe one too

heheh, i never got the triangle one taken apart w/o breaking it


OH oh, and what about Rubik's Revenge? the tiles one, all tied together with fishing line (or some sort of string of that type)

that one was actually easy to solve, and of course you couldn't take that apart without destroying it, i guess everyone knew about the re-assembly method by then


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AgentOBorg
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Icon 4 posted December 16, 2001 09:12      Profile for AgentOBorg     Send New Private Message       Edit/Delete Post 
quote:
Originally posted by Angry Rooster:
I was always amazed at how few people figured out the reassembly method...

Certainly made me feel special though, until this thread I was the only person I knew to figure it out


This method wore out my cube -- and it never lasted, 'cause my sister had to go mix it up again! -- why couldn't she just play with her own cube?


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greycat

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Icon 1 posted December 17, 2001 06:41      Profile for greycat   Author's Homepage     Send New Private Message       Edit/Delete Post 
I had 2 different books that had instructions for solving the Rubik's Cube. They were slightly different, and I combined the best parts of each one. I used to be able to solve a Cube in under 2 minutes. But I've forgotten the hard parts (bottom layer) now.

I had a "triangle" too, which was of course a tetrahedron (pyramid). I don't recall whether I was able to solve that one.

I had a 4x4 cube, but I never solved that one.

I also had a couple cylinder-based puzzles. One of them had colored balls that slid up and down, and the other had chain links. The chain links had "top", "bottom" and "middle" variants, so it was slightly harder than the balls (except that the chain links puzzle only had 4 sides, whereas the balls had like 6 or so). Anyway, those were fairly easy ones.

I had some fun with a Rubik's Snake too. That was a long "strip" of triangular pieces (with square bases) which could rotate 90 degrees. The Snake could be formed into a ball-like shape with a bit of difficulty, or into other shapes.

There were a few other puzzles that I don't remember clearly. I think they're still in my parents' house.


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quantumfluff
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Icon 1 posted December 17, 2001 08:34      Profile for quantumfluff     Send New Private Message       Edit/Delete Post 
quote:
Originally posted by homesalad:
Well the point is, that at one of them one of the guys there was working a 5X5 rubiks cube, which I hadn't seen before. So it still has 6 sides, but each side has 25 squares on it. It was pretty crazy, he'd never done a 5X5 before, and in like an hour or two, (with a beer in one hand) he'd figured out the solution. I was impressed.

I'm trying to visualize it, but I'm not sure it's all that difficult. Let's say you can get the center 3x3 of each side to be the same color. Isn't the remaining problem of the corners the same as a 3x3 cube? It seems like getting the centers right should e easy. I was never a big cube solver myself, so can anyone else confirm this?

Anyway, I'm impressed that the guy was able to manipulate the cube with the beer in one hand. I would have to wear one of those hats which hold the beer and have a long straw to your mouth. Hey, maybe a CamelBack filled with tequila. Yes! A new product idea. The "Camel-FlatOnYour-Back". It holds two liters of your favorite alcoholic beverage, to both hydrate and dehydrate at the same time!


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annie
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Icon 1 posted December 17, 2001 10:55      Profile for annie     Send New Private Message       Edit/Delete Post 
quote:
Originally posted by greycat:
I also had a couple cylinder-based puzzles. One of them had colored balls that slid up and down, and the other had chain links. The chain links had "top", "bottom" and "middle" variants, so it was slightly harder than the balls (except that the chain links puzzle only had 4 sides, whereas the balls had like 6 or so). Anyway, those were fairly easy ones.

I had some fun with a Rubik's Snake too. That was a long "strip" of triangular pieces (with square bases) which could rotate 90 degrees. The Snake could be formed into a ball-like shape with a bit of difficulty, or into other shapes.


Sounds like some of the puzzles my uncle had. I remember I was so proud when I learned how to make the snake into a ball. But i never had enough patience to solve the Rubik's cube, and I felt that if I used a book I was cheating.

------------------
the world will have to end someday; hopefully not while i'm around.


Posts: 391 | From: somewhere in Canada | Registered: Sep 2001  |  IP: Logged
DoctorWho

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Icon 7 posted December 17, 2001 11:59      Profile for DoctorWho     Send New Private Message       Edit/Delete Post 
I still have all puzzles from when I was a kid.

2 Rubik's cubes
Rubik's snake
Pyraminx
Orb
Rubik's magic small and large versions

I can still solve them all, just takes more time now.

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CrawGator

A common mistake people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools. Douglas Adams Mostly Harmless


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ginacanadiangeek
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Icon 4 posted December 20, 2001 19:31      Profile for ginacanadiangeek     Send New Private Message       Edit/Delete Post 
Rubick's cubes are far too unsophisticated to even be mentioned in any forum on this website!

Are there any battery powered rubick's cubes?


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greycat

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Icon 1 posted December 21, 2001 05:31      Profile for greycat   Author's Homepage     Send New Private Message       Edit/Delete Post 
You don't need to be powered to be sophisticated. Remember the World Abacus Expo storyline?
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Icon 10 posted December 23, 2001 16:27            Edit/Delete Post 
quote:
Originally posted by ginacanadiangeek:
Rubick's cubes are far too unsophisticated to even be mentioned in any forum on this website!

Are there any battery powered rubick's cubes?


Are you kidding or something? This is a site for Mac heads, sophisticated for them is a 20 MHz CPU. Anyway, I doubt a Macs video card can support enough colors to show a proper picture of a Rubik's cube.


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homesalad
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Icon 1 posted December 24, 2001 08:50      Profile for homesalad     Send New Private Message       Edit/Delete Post 
Oh Jeez...Here we go again....Well, there will be no CPU wars on this thread...Please Recall, I started this thread...
Posts: 220 | From: On The Road... | Registered: Oct 2001  |  IP: Logged
theJacob
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Icon 1 posted December 27, 2001 18:55      Profile for theJacob     Send New Private Message       Edit/Delete Post 
Hi everyone. I'm back.

Oh boy. Computer wars again. We need more Megaherz Myth JOTs.

20 megz...my first computer was 20 (25 "turbo").

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Intellegnce+Laziness=Efficency


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BlueAntoid
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Icon 5 posted January 06, 2002 17:57      Profile for BlueAntoid   Author's Homepage     Send New Private Message       Edit/Delete Post 
My dad had a 4X4 Cube, but somebody stole it. I can't figure them out, anyway.
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iballoondesign
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Icon 1 posted January 08, 2002 19:30      Profile for iballoondesign   Author's Homepage     Send New Private Message       Edit/Delete Post 
I don't understand - when I look at the cube and I thought it would be easy to solution. I took wrong mouth. I couldn't finish it in my lifetime. I will never able to get thing done and I decide to peel and put back color together and show off my dad. Ta-da!
Posts: 569 | From: Irving, TX | Registered: Dec 2001  |  IP: Logged
Swiss Mercenary

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Icon 12 posted January 09, 2002 05:38      Profile for Swiss Mercenary     Send New Private Message       Edit/Delete Post 
Behind one of the centre squares is a small plastic cover that you can pop off and get at the screw holding the cude together.
By undoing this the cube comes apart and then you can reassemble in the correct manner.

Now how did I know this? Is my success at all those 'Solve the Cube' competitions now finally explained?


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Bregalad
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Icon 1 posted January 09, 2002 18:36      Profile for Bregalad     Send New Private Message       Edit/Delete Post 
Back when the plastic rubik's cube first appeared in the early 1980's, the hallways of my high school were lined with kids trying to beat each other at solving the puzzle. I wasn't the geekiest guy around so I eventually broke down and bought a book called the Simple Solution to Rubik's Cube. All the steps were short and easily memorized, and the decision points had a short list of possible scenarios. Unfortunately it was a very slow method and I only beat 2 minutes when I was lucky and the cube hadn't been well scrambled. The method also fell down if somebody had taken the cube apart and reversed one of the edge pieces before scrambling it.

After most people had gotten bored with the cube I became obsessed with reversing a single piece without taking it apart, knowing that it must be possible. For months I produced interesting patterns and discovered a quick way to "solve" the cube with 3 spots out of place. Then one day I looked down at what looked like another solved cube (most repetitive patterns eventually undo themselves) and decided to give up. When I went to put the cube back on the shelf with the blue side facing me I saw that it wasn't all blue. I had finally achieved my goal, but couldn't remember the hundreds of steps I'd used to get there


Posts: 484 | From: Vancouver, BC, Canada | Registered: Jan 2002  |  IP: Logged


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