Re: Slide puzzle question

[Bob Sneidar via use-livecode]

I would love to give an out of parity Rubix Cube to one of those Rubix Cube 
savants and see how long it taked to figure out they cannot solve it! ;-P

Bob S


> On Mar 7, 2018, at 08:22 , Ralph DiMola via use-livecode 
>  wrote:
> 
> I don't know about the 9 puzzle but I suspect it's like the 15 puzzle. The
> 15 puzzle and Rubics Cube have parity. If the 15 is out of parity it can
> never be solved. The same for Rubics Cube, if you say switch 2 edge pieces
> or rotate 1 corner piece it's not solvable.
> 
> Ralph DiMola


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RE: Slide puzzle question

[Ralph DiMola via use-livecode]

I don't know about the 9 puzzle but I suspect it's like the 15 puzzle. The
15 puzzle and Rubics Cube have parity. If the 15 is out of parity it can
never be solved. The same for Rubics Cube, if you say switch 2 edge pieces
or rotate 1 corner piece it's not solvable.

Ralph DiMola
IT Director
Evergreen Information Services
rdim...@evergreeninfo.net


-Original Message-
From: use-livecode [mailto:use-livecode-boun...@lists.runrev.com] On Behalf
Of William de Smet via use-livecode
Sent: Wednesday, March 07, 2018 9:41 AM
To: How to use LiveCode
Cc: William de Smet
Subject: Slide puzzle question

Hi there,

I am making a 9 piece slide puzzle.
How many pieces should be in the right place at start to solve the puzzle?



greetings,

William
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Re: Slide puzzle question

[Geoff Canyon via use-livecode]

I'm not sure whether there is an answer in terms of pieces in place/out of 
place. I know that there are (I think three) different "position-spaces" where 
each space is unreachable from the others. 

The easy solution is to this problem is to start with the puzzle solved and 
quickly execute thirty or so moves at random, either visibly or with the screen 
locked.

gc

> On Mar 7, 2018, at 6:40 AM, William de Smet via use-livecode 
>  wrote:
> 
> Hi there,
> 
> I am making a 9 piece slide puzzle.
> How many pieces should be in the right place at start to solve the puzzle?
> 
> 
> 
> greetings,
> 
> William
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Slide puzzle question

[William de Smet via use-livecode]

Hi there,

I am making a 9 piece slide puzzle.
How many pieces should be in the right place at start to solve the puzzle?



greetings,

William
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