dailysudoku.com

Tyrone Shuz · Joined: 29 Jun 2013 Posts: 11

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?

Pat · Joined: 23 Feb 2010 Posts: 207

Tyrone Shuz · Joined: 29 Jun 2013 Posts: 11

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?

Tyrone Shuz · Joined: 29 Jun 2013 Posts: 11

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?

keith · Posted: Wed Jul 31, 2013 11:27 pm Post subject:

Lucky for you, someone wrote it all down.

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

Keith Very Happy