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Help a noob w/remote pair chains

 
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Tyrone Shuz



Joined: 29 Jun 2013
Posts: 11

PostPosted: Tue Jul 30, 2013 8:56 pm    Post subject: Help a noob w/remote pair chains Reply with quote

I have a hard time finding the "end" of the chain. From my otherwise fantastic Sudoku app recommended to me here, in the tutorial it says:

"When searching for the end of the chain it is convenient to color the cells based on their distance, either even or odd, from a starting cell" then color even distances one color, odd another.

I don't know how you calculate distance, and in the example they show, it appears that all the pairs are an even distance away from each other. I assume if you're counting from R7c1 to R3c3, it's a distance of 6 cells?
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Pat



Joined: 23 Feb 2010
Posts: 165

PostPosted: Wed Jul 31, 2013 2:12 pm    Post subject: Reply with quote

Tyrone Shuz wrote:

I don't know how you calculate distance

I assume if you're counting from R7c1 to R3c3, it's a distance of 6 cells?

no
distance = number of steps along the chain
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Tyrone Shuz



Joined: 29 Jun 2013
Posts: 11

PostPosted: Wed Jul 31, 2013 4:00 pm    Post subject: Reply with quote

Oh my, I'm afraid I'm still in the dark. If you were going to highlight each cell with the two applicable candidates, obviously those in the same house would get a different color, but how do you know how to color those outside the house?
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Tyrone Shuz



Joined: 29 Jun 2013
Posts: 11

PostPosted: Wed Jul 31, 2013 5:44 pm    Post subject: Do you mean... Reply with quote

Cells that see each other? Two in the same house would be different, then scan the grid for a cell that one of them sees, and color it the opposite?
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keith



Joined: 19 Sep 2005
Posts: 3164
Location: near Detroit, Michigan, USA

PostPosted: Wed Jul 31, 2013 11:27 pm    Post subject: Reply with quote

Lucky for you, someone wrote it all down.

http://www.dailysudoku.com/sudoku/forums/viewtopic.php?p=8277

Keith Very Happy
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