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## #1 2013-04-26 17:13:03

Agnishom
Real Member
From: Riemann Sphere
Registered: 2011-01-29
Posts: 24,852
Website

### Slider Puzzle

How do I devise an algorithm to solve a sliding puzzle?

'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
I'm not crazy, my mother had me tested.

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## #2 2013-04-26 17:21:58

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Slider Puzzle

Hi;

Do you mean the 15 puzzle?

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #3 2013-04-26 18:04:55

Agnishom
Real Member
From: Riemann Sphere
Registered: 2011-01-29
Posts: 24,852
Website

### Re: Slider Puzzle

The 15 puzzle is unsolvable.

'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
I'm not crazy, my mother had me tested.

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## #4 2013-04-26 18:08:50

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Slider Puzzle

Some positions are not possible but others are.

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #5 2013-04-26 18:25:44

Agnishom
Real Member
From: Riemann Sphere
Registered: 2011-01-29
Posts: 24,852
Website

### Re: Slider Puzzle

Ok, so how to do it?

'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
I'm not crazy, my mother had me tested.

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## #6 2013-04-26 18:27:25

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Slider Puzzle

There is some math that tells you whether it is solveable or not but I have forgotten it.

Programming it, looks tough.

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #7 2013-04-26 18:50:13

mathaholic
Member
From: Earth
Registered: 2012-11-29
Posts: 3,251

### Re: Slider Puzzle

Mathematica?

Mathaholic | 10th most active poster | Maker of the 350,000th post | Person | rrr's classmate

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## #8 2013-04-26 19:16:08

Agnishom
Real Member
From: Riemann Sphere
Registered: 2011-01-29
Posts: 24,852
Website

### Re: Slider Puzzle

But programming it is what I am thinking.
After all, programs are threre which solve them

'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
I'm not crazy, my mother had me tested.

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## #9 2013-04-26 21:10:17

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Slider Puzzle

I will try one and see what comes up.

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #10 2013-04-26 23:48:51

Agnishom
Real Member
From: Riemann Sphere
Registered: 2011-01-29
Posts: 24,852
Website

### Re: Slider Puzzle

Did you?

'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
I'm not crazy, my mother had me tested.

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## #11 2013-04-26 23:51:40

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Slider Puzzle

I have not even scratched the surface because I am still wrestling with a representation of the puzzle itself. It is unlikely that I will get far even when I solve that small problem because I do not understand how the program should pick from its many choices.

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #12 2013-04-26 23:57:23

Agnishom
Real Member
From: Riemann Sphere
Registered: 2011-01-29
Posts: 24,852
Website

### Re: Slider Puzzle

Are you on Win 7?

The algorithm isn't simple, it involves a lot of graph theory...

Last edited by Agnishom (2013-04-26 23:58:55)

'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
I'm not crazy, my mother had me tested.

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## #13 2013-04-27 00:11:42

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Slider Puzzle

Heck no!

That is the problem right there. I am not very good with graph theory. As a matter of fact, I stink.

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #14 2013-04-27 00:22:16

Agnishom
Real Member
From: Riemann Sphere
Registered: 2011-01-29
Posts: 24,852
Website

### Re: Slider Puzzle

http://www.brian-borowski.com/Software/Puzzle/

Are they calling each state a node?

'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
I'm not crazy, my mother had me tested.

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## #15 2013-04-27 00:34:56

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Slider Puzzle

Probably, that would make sense.

Here is the math behind every solution.

http://mathworld.wolfram.com/15Puzzle.html

Also, there are tons of these programs to download. I need some sleep, see you.

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #16 2013-04-27 00:43:30

Agnishom
Real Member
From: Riemann Sphere
Registered: 2011-01-29
Posts: 24,852
Website

### Re: Slider Puzzle

Okay Sweet Dreams!

'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
I'm not crazy, my mother had me tested.

Offline

## #17 2013-04-27 00:47:24

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Slider Puzzle

Thanks and same to you.

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Offline