Where to find 18-clues symmetric sudoku?

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Where to find 18-clues symmetric sudoku?

Postby giant » Tue Aug 09, 2005 9:35 pm

Any idea where one can find symmetric sudoku with 18-clues?
giant
 
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Postby tso » Wed Aug 10, 2005 2:59 am

Here's a PDF file with 100 of them: http://puz.hp.infoseek.co.jp/honkaku/eighteen.pdf

Here's a page with 10 more all of the same pattern:
http://www.geocities.jp/takinogawa001/h18/HINT18.htm
tso
 
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Postby olimpia » Sun Mar 15, 2009 7:22 am

Rico.alan posted a few with new shapes here:

http://www.flickr.com/photos/npcomplete/

there's also some 19's with 2-way symmetry.
olimpia
 
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