mersenneforum.org Rubik's cube and variations
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2009-02-11, 20:34   #34
Uncwilly
6809 > 6502

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Aug 2003
101×103 Posts

2·3·1,489 Posts

Quote:
 Originally Posted by Orgasmic Troll Seriously? Why are you continuing this conversation?
Because it is on topic and in defense of my original post. Did you really need to respond?

 2009-02-11, 21:18 #35 davieddy     "Lucan" Dec 2006 England 2×3×13×83 Posts Until I saw jrk's video, I suspected OT was taking the piss when he mentioned a 7x7. I might have described the construction (as UncWilly did) as "elegant and simple" but that would have been sarcastic too. Last fiddled with by davieddy on 2009-02-11 at 21:20
2009-02-11, 21:19   #36
Orgasmic Troll
Cranksta Rap Ayatollah

Jul 2003

28116 Posts

Quote:
 Originally Posted by Uncwilly Because it is on topic and in defense of my original post. Did you really need to respond?
I'm compelled by curiosity and utter astonishment. You don't seem to have a clue of how uselessly pedantic you're being. You're not really adding any signal to this discussion, just very precise noise.

 2009-02-17, 10:35 #37 CADavis     Jul 2005 Des Moines, Iowa, USA 2×5×17 Posts I just started learning the Rubik's cube yesterday (I played with it several years ago but never solved it) and after a couple hours I was able to get it solved in around 5 minutes on average. A couple more hours later and my best is 2:15.
 2009-03-10, 14:31 #38 Orgasmic Troll Cranksta Rap Ayatollah     Jul 2003 64110 Posts Solved the mirror cube (it's functionally equivalent to the normal rubik's cube, but it takes some getting used to) Solved the 7x7 (and figured out how to put smiley faces on it) and I just got a Square One ... man those things are devilish.
 2009-03-23, 01:19 #39 stathmk     Mar 2009 Indiana, United Stat 24·3 Posts Imagine The Terminator Robot solving it! I like to look at videos of robots kind-of like this one that solve Rubik’s cubes: http://www.youtube.com/watch?v=jkft2qaKv_o http://www.youtube.com/watch?v=i25cfdcum7U http://www.youtube.com/watch?v=a-X1-qgzGJs&NR=1 It looks a lot like the robot from The Terminator part 1!
 2009-03-23, 01:22 #40 stathmk     Mar 2009 Indiana, United Stat 24·3 Posts I went to school with the gigaminx inventor. I went to Purdue University with Tyler Fox, who invented the gigaminx: http://www.youtube.com/watch?v=8IbOP-2iPaE I did an internet search for gigaminx, and this was the first page about where to buy it: http://wiki.answers.com/Q/How_can_i_buy_a_gigaminx Go down to posts #7 and #10, and it’s videos of solving the simulated gigaminx: http://www.speedsolving.com/forum/showthread.php?t=5957 The 4D Rubik’s cube computer game is free: http://www.superliminal.com/cube/cube.htm The 5D Rubik’s cube computer game is free: http://www.gravitation3d.com/magiccube5d/ Magic Cube 5D solved: http://www.youtube.com/watch?v=81gGxSEm2i0&feature=related Magic Cube 5D 2x2x2 solve: http://www.youtube.com/watch?v=pmTHhq37M4g&NR=1 The Magic120Cell is what I imagine the 4D or 5D Rubik’s Cube and gigaminx would be if they were combined: http://www.youtube.com/watch?v=W4bkU3nC1Jw&NR=1
2009-03-23, 01:26   #41
stathmk

Mar 2009
Indiana, United Stat

3016 Posts
100x100x100 Rubik's cube solved by somebody

My Dad read “The Simple Solution To Rubik’s Cube” http://www.amazon.com/s/ref=nb_ss_gw?url=search-alias%3Daps&field-keywords=The+Simple+Solution+to+Rubik%27s+Cube and solved the Rubik’s Cube.

Lego Mindstorm Rubik’s Cube Solver: http://www.youtube.com/watch?v=3QOvEG27Gt4
Another Lego Mindstorm Rubik’s Cube Solver: http://www.spike.com/video/fully-automated-lego/2898303?cid=YSSP
20x20x20 Rubik’s Cube solved: http://www.youtube.com/watch?v=Rpfz3m11bsk
Quote:
 Originally Posted by 10metreh ...There is even one where a computer solves a 100x100x100 cube. ...
I suppose that you mean this video: 100x100x100 Rubik’s cube solved:

I’ve found other Rubik’s cube solving Programs on the internet. There are other Youtube videos of similar things, but I think I’ve posted enough videos for now.

 2009-04-02, 21:11 #42 flava     Feb 2003 2×59 Posts I solve the 3x3x3 Rubik's cube like this: - on one face make a "cross" aligned with the centerpieces of the adiacent faces; let's call this face "down" - put in the lower corners - put the upper corners in place - rotate the upper corners so they are correctly placed - put in the upper face sides (middle pieces) - solve the remaining middle pieces on the second row Takes me about 2 minutes, no faster than 1:30 There are way faster methods (under 15 seconds for a solve) but they require memorizing a lot of "moves". The method I use is easier to understand for me (to figure out why it works) and can be extended to big cubes. Last fiddled with by flava on 2009-04-02 at 21:12
 2009-07-30, 08:04 #43 10metreh     Nov 2008 91216 Posts Just timed myself with www.cubetimer.com. These were my times (rounded to the nearest second): 2:43 (messed up early on), 1:45, 1:33 (fairly lucky), 1:25 (lucky, new PB), 1:59, 1:56, 1:55, 1:41, 1:51, 1:55, 2:53 (made a massive mistake), 1:42. The "10 of 12" average I got (1:54) was a new PB for me too.
2009-07-30, 20:54   #44
Chris Card

Aug 2004

2×5×13 Posts

Quote:
 Originally Posted by flava I solve the 3x3x3 Rubik's cube like this: - on one face make a "cross" aligned with the centerpieces of the adiacent faces; let's call this face "down" - put in the lower corners - put the upper corners in place - rotate the upper corners so they are correctly placed - put in the upper face sides (middle pieces) - solve the remaining middle pieces on the second row Takes me about 2 minutes, no faster than 1:30 There are way faster methods (under 15 seconds for a solve) but they require memorizing a lot of "moves". The method I use is easier to understand for me (to figure out why it works) and can be extended to big cubes.
I learnt how to solve the cube soon after they arrived in the UK in 1979.
First time it took me 2 weeks! I was never a speed solver, and I've no idea what my best time was (when I was in practice), but the algorithm I use is:
- get the corner pieces of two opposite faces the correct colour, but not necessarily in the correct order.
- sort out the order of the corner pieces, so all corners are in the correct position. This step uses a move which swaps a pair of corners on the top face, while interchanging two pairs of corners on the bottom face; possibly several times.
- fill in two opposite faces, as far as possible simultaneously, by repeatedly using the middle plane to get two edge pieces in the correct position relative to each other and then slotting them into their (opposite faces).
- sort out the middle plane. Sometimes this involves a move which flips two edges and leaves everything else the same.

Once I could solve the cube, I concentrated on working out how to make interesting patterns, rather than speed - I seem to remember my first cube tended to fall apart if you tried to move it too quickly.

Chris

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