XY-chain trouble!

Advanced methods and approaches for solving Sudoku puzzles

XY-chain trouble!

Postby puzzleboyslc » Tue Jul 08, 2008 10:39 pm

I don't understand where to start and end an xy-chain. I always get to the part in a sudoku where I can tell I need to do it but I don't know which cell to start and end with. Any advise?
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Joined: 08 July 2008

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