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| ChPicard
| | Joined: 12 Mar 2008 | | Posts: 82 | | : | | Location: Montreal, Canada |
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 Posted: Tue Oct 13, 2009 10:45 pm Post subject: Anon17 found 325 new 17 given sudokus!!!!!!!! |
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Hi everybody
Look that. Anon17 found 325 new 17 given sudokus!!!!!!!!
http://units.maths.uwa.edu.au/~gordon/sudokuid.php
Congratulations
Tell us anon17 how you do that. PLEASE
JPS |
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| coloin
| | Joined: 05 May 2005 | | Posts: 97 | | : | |
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| Posted: Tue Oct 20, 2009 5:45 pm Post subject: |
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Anon17 was in communication with Gordon Royle some time back and he "sort of" explained his methods.
Given that gsf tried exceedingly hard with multiple processors over a long period - and still didnt find the 325 that were out there - it remains possible/probable that there are others as yet undiscovered.
If we were to start the whole process again and were able to generate the same 49151 17-puzzles this would be an indication that we were close to closure.
Given the timing of the post I suspect that anon17 has maybe done this a couple of times !
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| gsf
| | Joined: 18 Aug 2005 | | Posts: 411 | | : | | Location: NJ USA |
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| Posted: Wed Oct 21, 2009 11:53 am Post subject: |
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| coloin wrote: |
Given that gsf tried exceedingly hard with multiple processors over a long period - and still didnt find the 325 that were out there - it remains possible/probable that there are others as yet undiscovered.
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I lost the grid for ~6 weeks
the search re-started on 64 processors last week
in that time 75103 17s were generated,
24797 were essentially different
all were already in the catalog |
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