Monthly Archives: December 2011

Sysudoku Sue de Coq

Posted on December 27, 2011 by Sudent

This post details forms of Sue de Coq  not revealed  in the founding post of October 24, 2005, widening the definition of classic Sue de Coq to all ALS and including a single alternate version. It introduces another form of … Continue reading →

Posted in Advanced Solving | Tagged , , , , | 2 Comments

De Coq on Sue de Coq

Posted on December 22, 2011 by Sudent

This post explains Sue de Coq and invites readers to enumerate all instances of it in the originating post’s puzzle. Sysudoku places Sue de Coq among the first advanced methods to try after basic solving is completed.  It is done … Continue reading →

Posted in Advanced Solving | Tagged , , | 4 Comments

Beginner’s Page

Posted on December 20, 2011 by Sudent

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 →

Posted in Uncategorized | Tagged , | 2 Comments

The Remote Pair – A Special XY-Chain

Posted on December 8, 2011 by Sudent

The remote pair comes your way with a blinking road sign. It is an XY-chain in which every bv along the chain contains the same two candidates, X and Y. The X and Y in the end cells are toxic. … Continue reading →

Posted in Advanced Solving, Sudoku Toolware | Tagged , , , | 2 Comments

Riding the XY Rails

Posted on December 6, 2011 by Sudent

This post illustrates the complete enumeration of all XY-chains and toxic end pairs by drawing curves through the bv along XY-chain routes. XY-chains are then systematically divided into sub-chains with toxic ends. It’s a Sysudoku innovation. The puzzle is from … Continue reading →

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