What is the logical criterion used to place the four different symbols that fills the 36 cells of the 6 x 6 grid ?

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| O | # | x | @ | # | O |
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| @ | O | O | x | x | @ |
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| @ | x | O | # | # | @ |
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| # | @ | @ | x | O | # |
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| # | O | O | x | x | # |
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| x | @ | # | O | @ | x |
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0=1, @=2, #=3, X=4

134231
211442
241332
322413
311443
423124

start at the top left corner with 1 then down 2, back up
3, then to right 4, down 1, down to left 2, etc...

Posted by David on 2005-06-08 04:04:57