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X-wing strategy

 
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Aidy

Joined: 26 Jul 2005
Posts: 2
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PostPosted: Tue Jul 26, 2005 4:31 pm    Post subject: X-wing strategy Reply with quote

I'm writing a solver (I think the world needs another one) and my x-wing technique looks for pairs in each row then eleminates the number from the candidates on the relevant columns.

Am I right in thinking it should also do it the other way and check for pairs in columns then eliminate candiates in the relevant row?
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chabo

Joined: 26 Jul 2005
Posts: 1
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Location: Belgium

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PostPosted: Tue Jul 26, 2005 9:42 pm    Post subject: Reply with quote

Indeed, you have to check the columns too.

More info on X-Wings can be found at:
http://www.daily-sudoku.tk
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