Monthly Archives: October 2011

Suset Enumeration on Sue de Coq

Posted on October 27, 2011 by Sudent

This post demonstrates a systematic  enumeration of subsets in the line marking of the Sue de Coq debut puzzle.  More difficult units are resolved by the scratchpad suset algorithm introduced in the previous post of October 25, 2011. To checkpoint … Continue reading →

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Subsets by Susets

Posted on October 25, 2011 by Sudent

This post explains the concept of locked sets, and the terms associated with them.  It suggests how to find them, and includes  a scratchpad version of a common computer algorithm for detecting them. A locked set is defined with reference … Continue reading →

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Line Marking Follow Up Actions

Posted on October 20, 2011 by Sudent

This post describes the follow up to the candidate fill of each line in Sysudoku line marking.  This includes the marking of line slinks, checking for X-wings, identification of  naked and hidden singles, and marking of bi-value cells. It also … Continue reading →

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Sysudoku Line Marking

Posted on October 13, 2011 by Sudent

This post describes the Sysudoku basic technique of line marking, which pencil marks all remaining candidates, line slinks and bi-value cells.  In a walk through line marking of the Sue de Coq classic, the efficiencies of line marking are explained. … Continue reading →

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Sysdudoku Box Marking

Posted on October 11, 2011 by Sudent

This post describes in detail the procedure of box marking, the first of two basic solving stages of Systematic Sudoku.  Box marking identifies and marks slinks and naked subsets within boxes, as well as new clues.  A walkthrough illustrates  the … Continue reading →

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Slink Marking

Posted on October 4, 2011 by Sudent

This post is about the slink marking, the Sysudoku method of pencil marking.  It explains why this form is far more useful than the keypad system seen in of most Sudoku publications.  This fact is demonstrated here with a historically … Continue reading →

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A Guide for Experts

Posted on October 2, 2011 by Sudent

This post describes the explanations, innovations, and reviews of the Systematic Sudoku blog for experienced solvers. Influences and introducing posts for innovations are identified. In blog revisions, the original dates and order of introductions is preserved.  This update occurred March … Continue reading →

Posted in Advanced Solving, Basic Solving Procedures, Expert Reviews, Extreme Solving, Monster, Puzzle Reviews, Sudoku Toolware | Tagged , , , , | 1 Comment