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4x4 (16x16) and 5x5 (25x25)

 
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rallveird

Joined: 13 Jun 2005
Posts: 31
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PostPosted: Thu Jul 28, 2005 2:04 pm    Post subject: 4x4 (16x16) and 5x5 (25x25) Reply with quote

I'm now publishing these sizes of Sudokus too on my webpage. Test them out. They're also indexed according to which solving methods you need to use on them:

http://www.menneske.no/sudoku4/eng/

http://www.menneske.no/sudoku5/eng/

Good luck!
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dukuso

Joined: 14 Jul 2005
Posts: 424
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Location: germany

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PostPosted: Mon Aug 01, 2005 8:22 am    Post subject: Reply with quote

I don't know how you created them, but
I think that even the hardest of your puzzles are among a very
small fraction of easiest puzzles of that size.
It seems to me that a random 25*25 sudoku will be much
harder than any of your super hard ones.
This is probably because many clues could be removed with still a unique solution to that puzzle.
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rallveird

Joined: 13 Jun 2005
Posts: 31
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PostPosted: Thu Aug 04, 2005 9:29 pm    Post subject: Reply with quote

It's correct that you can make a lot more difficult than I've put on the website. But for the big ones I stick mostly to puzzles solvable by "logic". As you can see from the 4x4 the hardest one is 111545, which means you need to do over 100k iterations after you have applied all the logical solutions. 100k is probably not possible for a human to do, so if I generate them for 5x5 it will easily be 1 mill. I really see no point posting that difficult puzzles.

If you want a really, really hard one I can make you one Wink
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dukuso

Joined: 14 Jul 2005
Posts: 424
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Location: germany

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PostPosted: Fri Aug 05, 2005 10:29 am    Post subject: Reply with quote

rallveird wrote:

If you want a really, really hard one I can make you one :wink:



yes, please.
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