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 Post subject: Dual rings impossibility?
PostPosted: Sat Oct 30, 2010 4:28 pm 
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Joined: Mon Oct 18, 2010 10:48 am
So I was solving the dual rings puzzle, and reached an impossible solution.

Literally, impossible. Even Jaap says so (For convenience)

The back of the rings is solved, and so are the hidden pieces in between. Only one section of a ring has a -1 rotation.

The image is too big for the forum, and I'm too lazy to shrink it.

What do I do?

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 Post subject: Re: Dual rings impossibility?
PostPosted: Sat Oct 30, 2010 4:29 pm 
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Well, if it hasn't been taken apart, then it's perfectly possible. Try and work it yourself, it's more rewarding that way.

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 Post subject: Re: Dual rings impossibility?
PostPosted: Sat Oct 30, 2010 4:30 pm 
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Jaap's javascript applet (see my original post) agrees with my statement.

The situation is impossible. Try entering it yourself.

Also, don't get me wrong. I've solved it over ten times before this situation.

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 Post subject: Re: Dual rings impossibility?
PostPosted: Sat Oct 30, 2010 5:19 pm 
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Sometimes while solving the Dual Rings, a "token" piece gets caught on the opposing ring and rotates into an impossible state. It's very hard to describe, so you may not understand, but I've had that happen to me. You need to force the wrong piece back into its position.

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 Post subject: Re: Dual rings impossibility?
PostPosted: Sat Oct 30, 2010 5:24 pm 
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Will this damage the plastic?

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 Post subject: Re: Dual rings impossibility?
PostPosted: Sat Oct 30, 2010 5:40 pm 
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I've done it twice. Force the piece in the direction you want it to go, while turning the larger ring in the same direction to help it get around.

Mine's undamaged. Make sure you align the puzzle better while playing with it. :D

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 Post subject: Re: Dual rings impossibility?
PostPosted: Mon Nov 01, 2010 10:38 pm 
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Joined: Thu Dec 21, 2006 5:32 pm
Location: Bay Area, CA
Heh. I have owned this puzzle since I picked it up at Torito after IPP. I was a bit disappointed with myself that I had never solved it given that people had not discussed it as terribly difficult. I never really sat down and tried anything systematic. Usually such a puzzle would yield to me with a bit of tinkering.

Silly that I didn't realize it was in an impossible configuration. I had bought the store demo from Torito (last one!) and it was scrambled so someone must have forced a turn and left me scratching my head for far too long...

Dave

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