## 42742Re: devil's algorithm

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• Sep 20, 2011
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Happy fun cube

The cuber

devil's algorithm
does anyone know the devil's algorithm?... h_howee
Jan 5, 2005
3:38 am
Re: devil's algorithm
... You mean the shortest way to scramble a cube? Or what is it?... Stefan Pochmann
stefan_pochmann
Jan 5, 2005
5:55 pm
Re: devil's algorithm
More like the worst way to solve it. Devil's algorithm is an imagined algorithm that, by being applied over and over again, sorts through every single possible... Eivind Fonn
betrayedfiber
Jan 5, 2005
7:15 pm
Re: devil's algorithm
How about a devil's algorithm that cycles through every LL situation while leaving the F2L intact. That would most likely be easier to find and possibly... Chris Sz...
dishwashersa...
Jan 5, 2005
8:50 pm
Re: devil's algorithm
If you find it, please don't post it here. Assuming it looks random, it'd take a lot of memory: M = 12!*2^12*8!*3^8/12/1260 = 3.43*10^16 That's the minimum... Stefan Pochmann
stefan_pochmann
Jan 5, 2005
9:35 pm
Re: devil's algorithm
Oh, before I forget it: 4325 - The number of years to download it with a 1MBit/sec internet connection. So yeah, please don't fucking post it here ;-) Stefan ... Stefan Pochmann
stefan_pochmann
Jan 5, 2005
9:46 pm
Re: devil's algorithm
What if I am smart instead? http://www.stud.ntnu.no/~eivindfo/devalg.txt It's 3,847,762,288,469,010,006,992 moves long, but only 3 KiB large. I bet a 1MBit/sec... Eivind Fonn
betrayedfiber
Jan 5, 2005
10:58 pm
Re: devil's algorithm
Yaeh yaeh... ok... remember I was assuming it's random ;-) And hey, where's your proof? Ok, not necessary to prove it perfectly formally, but could you... Stefan Pochmann
stefan_pochmann
Jan 6, 2005
12:09 am
Re: devil's algorithm
how about god's algorithms? is there a site where i can find them?... h_howee
Jan 6, 2005
12:12 am
Re: devil's algorithm
*Sigh*, always the assumptions ruin my hour of triumph! :) CO stands for Corner Orientation. COC1 twists UFR clockwise and UBR counterclockwise. COC2 does the... Eivind Fonn
betrayedfiber
Jan 6, 2005
12:30 am
Re: devil's algorithm
Ok, thanks a lot. Very very nice! Actually I've once done something quite similar a while ago, so I should've had that idea, too :-) Damn. .. You've built it... Stefan Pochmann
stefan_pochmann
Jan 6, 2005
5:05 am
Re: devil's algorithm
... post. ... Ok, I'm too tired for it tonight, but the point is that these two algorithms, cleverly combined over and over again, will be powerful enough to... Stefan Pochmann
stefan_pochmann
Jan 6, 2005
5:10 am
Re: devil's algorithm
Ok here's an attempt: Let AC be the cycling alg and AS the swapping alg. My Devil's alg does 3*AC, then AS, then 1*AC, then AS, then 4*AC, then AS, and so on.... Stefan Pochmann
stefan_pochmann
Jan 6, 2005
5:47 am
Re: devil's algorithm
I would have thought that the "devil's algorithm" would be the shortest way to cycle through all N positions of the cube, i.e. a move sequence N-1 moves long... _jaap
Jan 6, 2005
7:40 am
Re: devil's algorithm
I wasn't aware that it would have to be the shortest one. That makes the problem a bit more delicate. :P Stefan: Nice... your's a bit more elegant :). The Pi... Eivind Fonn
betrayedfiber
Jan 6, 2005
10:29 am
Re: devil's algorithm
... I really like the idea of an explicit algorithm for this; the problem is distinct from finding a Hamiltonian circuit, though obviously that would solve the... mike_go_uk
Jan 6, 2005
12:33 pm
Re: devil's algorithm
Your depth-first algorithm is this long (worst case scenario): 11,081,777,224,076,574,027,294,514,344,648,207,681,624 moves So I gather mine is _slightly_ more... Eivind Fonn
betrayedfiber
Jan 6, 2005
12:57 pm
Re: devil's algorithm
... True, indeed. Let's not neglect the practicalities ;) Mike... mike_go_uk
Jan 6, 2005
1:20 pm
Re: devil's algorithm
Excactly. :) I wrote a little script for those who really have time on their hands: http://www.stud.ntnu.no/~eivindfo/devalg.php It serves up the moves in... Eivind Fonn
betrayedfiber
Jan 6, 2005
2:48 pm
Re: devil's algorithm
... hands: Thank you! This should be a wonderful resource for anyone new to speedsolving. Please, make sure that it is available for the next 120 trillion... mike_go_uk
Jan 6, 2005
3:11 pm
Re: devil's algorithm
Woow! A good candidate for next weeks's FMC ;-) "What is it good for? Absolutely nothing! Say it again ..." -Frankie goes to Hollywood (1984) </Per> ... into ... Per Kristen Fredlund
aspiring_to_...
Jan 6, 2005
5:39 pm
Re: devil's algorithm
I love it :-) Though I think in the recursion steps you should do all 18 possibilities, not only six. It gave me the idea of using this with my two algs: Let...

--- In speedsolvingrubikscube@yahoogroups.com, h_howee <no_reply@...> wrote:
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> does anyone know the devil's algorithm?
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