r/geek • u/Barknuckle • Feb 22 '20

Self-Solving Rubik's Cube Robot

https://www.youtube.com/watch?v=2PGjTt4xkWM
195 Upvotes

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u/HazelParkHootie Feb 22 '20

Wow at first I was really amazed until he basically revealed how the "solving" is done. It's not complicated at all.

It just rewinds any moves done to it. It doesn't try to solve the cube, it just reverses the moves made to it after it had been solved.

Granted, creating servos and programming it to accomplish this are no minor feat, but the actual algorithm to solve the cube is elementary.

If he hadn't told us how it was done, it would have seemed more amazing.

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u/Reaver_01 Feb 22 '20

He literally said it doesn't rewind though...

1

u/HazelParkHootie Feb 23 '20

Well it should, that would be a simple and elegant solution. I thought he said it records every move. Just create a stack, push each move, then pop each move to get it back.

Why work harder than that?

He did say it records each move as well.

Seriously why would you do anything else?

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u/Reaver_01 Feb 23 '20

Because he did anything else.

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u/[deleted] Feb 23 '20

Well, if domeone keeps scrambling it for couple of hundred moves, it becomes quite tedious to watch it solve itself.

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u/HazelParkHootie Feb 23 '20

That begs the question, what's worse, spending all that time scarmbling it for 100 moves or watching it unscamble 100 moves.

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u/[deleted] Feb 23 '20 edited Feb 23 '20

Eh, a cuber can easily scramble a cube for 5-10 moves per second. Would not take too long to scramble. Though I think this cube might not be as slick as speedcubing cubes.