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Are the 5472730538 essentially different grids available?

 
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ChPicard

Joined: 12 Mar 2008
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PostPosted: Fri Dec 19, 2008 3:19 pm    Post subject: Are the 5472730538 essentially different grids available? Reply with quote

Hi

I am looking for this big file if available.

And also for the 15 given sudoku with only 596 completions.

Thank you for help.

ChPicard
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gsf

Joined: 18 Aug 2005
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PostPosted: Thu Jan 01, 2009 2:55 am    Post subject: Re: Are the 5472730538 essentially different grids available Reply with quote

ChPicard wrote:
Hi

I am looking for this big file if available.

And also for the 15 given sudoku with only 596 completions.

Thank you for help.

ChPicard

I have the collection in 300 files totaling 5,731,623,052 bytes (just over 8 bits per grid)
not amenable to download unless you know of a site that will host 6Gb for download
its not standard compression, but I can supply the decompressor program
it takes ~5 hours to scan through all grids @ ~2Ghz
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Lunatic

Joined: 11 Mar 2007
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PostPosted: Mon Jan 05, 2009 11:26 am    Post subject: Reply with quote

Isn't there a program that can generate them ? Someone must have done it, i can't imagine that they were all collected by hand. Confused
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Lunatic

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PostPosted: Mon Jan 05, 2009 11:27 am    Post subject: Reply with quote

Isn't there a program that can generate them ? Someone must have done it, i can't imagine that they were all collected by hand. Confused
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Lunatic

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PostPosted: Mon Jan 05, 2009 11:27 am    Post subject: Reply with quote

Isn't there a program that can generate them ? Someone must have done it, i can't imagine that they were all collected by hand. Confused
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Marc
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Lunatic

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PostPosted: Mon Jan 05, 2009 11:28 am    Post subject: Reply with quote

Isn't there a program that can generate them ? Someone must have done it, i can't imagine that they were all collected by hand. Confused

[Edit] I got some errors while posting this message, that's why this post has some duplicates, sorry... [/Edit]
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Last edited by Lunatic on Tue Jan 06, 2009 11:11 am; edited 1 time in total
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gsf

Joined: 18 Aug 2005
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PostPosted: Mon Jan 05, 2009 2:10 pm    Post subject: Reply with quote

Lunatic wrote:
Isn't there a program that can generate them ? Someone must have done it, i can't imagine that they were all collected by hand. Confused

let the back of an envelope do the imagining: generating 5G grids @ 1 grid/sec => over 100 years

my solver can do it, but it takes about 2 weeks @ 2Ghz
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Lunatic

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PostPosted: Tue Jan 06, 2009 11:19 am    Post subject: Reply with quote

What about peer-to-peer ?
http://www.youtube.com/watch?v=i2m0qzRCs78
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Saethan

Joined: 19 Feb 2009
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PostPosted: Thu Feb 19, 2009 9:45 pm    Post subject: Reply with quote

I am thinking of doing a project at my university involving sudoku, and would greatly appreciate access to either the file or the program. I have access to a cluster computer and if the program is not already distributed, with code in hand I could probably rewrite it to use dsh or mpi.
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m_b_metcalf

Joined: 13 Mar 2006
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PostPosted: Fri Feb 20, 2009 9:28 am    Post subject: Re: Are the 5472730538 essentially different grids available Reply with quote

gsf wrote:
I have the collection in 300 files totaling 5,731,623,052 bytes (just over 8 bits per grid)
not amenable to download unless you know of a site that will host 6Gb for download
its not standard compression, but I can supply the decompressor program
it takes ~5 hours to scan through all grids @ ~2Ghz

Wouldn't that fit onto 2 DVDs? If so, could you not make it available by snail mail for a small fee? Just a suggestion.

Regards,

Mike Metcalf
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gsf

Joined: 18 Aug 2005
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PostPosted: Fri Feb 20, 2009 1:57 pm    Post subject: Re: Are the 5472730538 essentially different grids available Reply with quote

m_b_metcalf wrote:
gsf wrote:
I have the collection in 300 files totaling 5,731,623,052 bytes (just over 8 bits per grid)
not amenable to download unless you know of a site that will host 6Gb for download
its not standard compression, but I can supply the decompressor program
it takes ~5 hours to scan through all grids @ ~2Ghz

Wouldn't that fit onto 2 DVDs? If so, could you not make it available by snail mail for a small fee? Just a suggestion.

if I appended that to my todo list it would never get done
however, one could use my solver to do the same
I'd have no problem as long as the fees were within epsilon of the cost of media and post

re using parallel programming to speed it up
it doesn't have to be fine granularity
if you generate by bands I recall the worst band took < 2hrs
(my solver generates by bands)
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Saethan

Joined: 19 Feb 2009
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PostPosted: Fri Feb 20, 2009 7:43 pm    Post subject: Reply with quote

I do have one other option... I could set up an FTP server on one of our computers and just get the whole big file FTP'd to me - if you're willing to dedicate that much bandwidth. In fact I think SFTP is already set up on a number of computers that have the space for it.

I don't know exactly what my project is going to be yet, but am meeting with a math professor and CIS professor today to decide. I'm thinking maybe just as a learning exercise in MPI to try and find some 17-given proper puzzles.
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coloin

Joined: 05 May 2005
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PostPosted: Mon Feb 23, 2009 12:20 pm    Post subject: Reply with quote

belatedly...but i couldnt find it untill now !

Code:
+---+---+---+
|...|3.1|...|             
|2.4|...|...|   
|...|...|...|       
+---+---+---+   
|8..|52.|...|       
|...|...|9.1|         
|...|...|3..|           
+---+---+---+       
|...|.4.|.5.|           
|91.|...|...|             
|.3.|...|...|             
+---+---+---+ 15 clues     596 grid solutions.   source G Royle


C
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m_b_metcalf

Joined: 13 Mar 2006
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PostPosted: Mon Feb 23, 2009 5:17 pm    Post subject: Reply with quote

coloin wrote:

Code:
+---+---+---+
|...|3.1|...|             
|2.4|...|...|   
|...|...|...|       
+---+---+---+   
|8..|52.|...|       
|...|...|9.1|         
|...|...|3..|           
+---+---+---+       
|...|.4.|.5.|           
|91.|...|...|             
|.3.|...|...|             
+---+---+---+ 15 clues     596 grid solutions.   source G Royle


I played with this out of curiosity and found this by adding three clues:
Code:

 . . . 3 7 1 . . .
 2 . 4 . . . . . .
 . . . . . . . . . 
 8 . . 5 2 . . . .
 . . . . . . 9 . 1 
 . . . . . . 3 . .
 . . . . 4 . . 5 .
 9 1 . 6 . . . . .
 . 3 7 . . . . . .     solves with singles

Regards,

Mike Metcalf
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