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solving the rubik's cube

gorgonheap (Member Profile)

rottenseed says...

I know but it just reminds me of that "say no to drugs" episode of "Saved by the Bell".
In reply to this comment by gorgonheap:
I've always been serious about the self-link rule. Because it's so blatantly obvious that you'd have to be a twit not to see it. We all have pet peeves.

In reply to this comment by rottenseed:
I like how the heap of gorgon goes from playful jokester to serious rule-adherent member

In reply to this comment by gorgonheap:
Please read the posting guidelines *ban

rottenseed (Member Profile)

gorgonheap (Member Profile)

I, Aaron McDonald, solve the Rubik's Cube in under 2 mins

I, Aaron McDonald, solve the Rubik's Cube in under 2 mins

8348 (Member Profile)

CV Rubik - Computer sees Rubiks cube and solves it

djsunkid says...

i love this, but one complaint. Whatever algorythm they are using to solve the rubiks cube seems really bad. I've definitely seen much more optimised ones. There is no way you need that many steps to descramble a 3x3.
...
a little searching and i found this:

I generated 1 million random cubes on a 3 GHz Pentium 4 PC, trying to find a cube which was not solvable within 20 moves with the Two-Phase-Algorithm. This cube then would be a test candidate for a position which would need at least 21 moves to be solved with God's Algorithm.

But the Two-Phase-Algorithm solved all generated random positions within 20 moves. More precisely, it solved about 30000 random cubes per hour and the final distribution of the maneuver length was:
13: 4, 14: 18, 15: 81, 16: 609, 17: 3893, 18: 23411, 19: 141366, 20: 830618.

This shows, that the probability to find a random cube position which cannot be solved within 20 moves with the Two-Phase-Algorithm in a reasonable time must be very low or zero.
It also shows: If there are any cube positions which need at least 21 moves to be solved, these positons are very rare and there is almost no chance to find such positions by random.


So yes, there are definitely much, MUCH better ways of solving any given rubik's cube, especially for a computer.

This "two-phase" algorythm may be difficult or impossible for a human to learn, it may involve impractical memorisation, or something, but you can download a version from that site.

So yeah, awesome stuff, but they should implement whatever this "two-phase" business is.

Michel Gondry solves Rubik's cube with his feet - in 2 min!

Michel Gondry solves Rubik's cube with his feet - in 2 min!

How Michel Gondry solved a Rubik's Cube with his feat

Michel Gondry solves Rubik's cube with his feet - in 2 min!

Guy solves Rubik's cube in 20 seconds with one hand. Ladies:



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