Tag Archives: double line exclusion

Starting With Stephens


This begins a review of Paul Stephens’ solving recommendations and puzzles.  The review is based on Paul’s currently offered books,  Mastering Sudoku Week by Week, subtitled “52 steps to becoming a Sudoku wizard” , and his The Sudoku Addict’s Handbook. … Continue reading

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Box/Line Reduction


In a box/line reduction, or “box/line” for short, a line’s candidates for a number are restricted to one box. That makes these candidates a toxic set, since one of them must be supplied to the line.  We can remove other … Continue reading

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Beginner’s Page


I’ve added a page demonstrating dublexes and cross hatching, for begineers. There was a little hitch getting images and text to display, but I think its cured now.  If you know anyone who couldn’t get started on the blog, please … Continue reading

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