Tag Archives: box/line

Beware 175 Follows Suit

Posted on November 20, 2018 by

This continues the review of Will Shortz’ Hard Sudoku v.1, with another documented basic finish. Starting the Guide?  Accounting for each move in this series, then trying them beforehand, will make Sysudoku basic yours. Beware 175 matches 165’s collapse point, … Continue reading →

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Funster Extreme 18 Stays in the Lines

Posted on July 24, 2018 by

After a brutal encounter with the bypass, what’s left of funx 18 is riddled with bv. A cluster covering  half the grid expands with a trap to wrap a color and finish the puzzle. The post concludes with an update on … Continue reading →

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The Volume 10 Rebecca Bean Extremely Hard Sudoku

Posted on March 6, 2018 by

This post begins the second review of a Rebecca Bean collection, this one prompted by a clever cover, and similarities in format to recently reviewed collections attributed to Moito Publishing, A.D. Ardson and James D. Glover. Here we resolve Extremely … Continue reading →

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Touring the Bypass and a Human Engineered Inscription

Posted on March 21, 2017 by

This post continues the visit of Sudoku Satisfaction readers to Sysudoku with a demonstration of the slink marking bypass, line marking inscription, and basic subset spotting. How was lunch?  . . .  Good. OK, we’re ready to continue. Here is … Continue reading →

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Hidden Logic Box/Line Interactions

Posted on November 22, 2016 by

This post looks at the brief and very late THLS treatment of box/line interactions in rc space. I say late, because box/lines (1/31/12) are essential in basic marking of candidates. But in The Hidden Logic of Sudoku,  box/lines are introduced … Continue reading →

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Basic Sudoku With Arnold

Posted on August 4, 2015 by

This post compares Arnold Snyder’s basic solving methods, the techniques leading to a full set of candidates, with Sysudoku basic.  Snyder’s basic methods are described in Sudoku Formula 1 and Formula 2. A second post will evaluate the Snyder advanced … Continue reading →

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Basic Solving With Bob Hanson

Posted on June 10, 2014 by

I start my review of Sudoku Assistant – Solving Techniques with the basic solving of Hanson’s Sudoku Assistant, introduced by last week’s post. Basic solving is defined as the process by which we complete the candidate grid, required for advanced … Continue reading →

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Box/Line Reduction

Posted on January 31, 2012 by

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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Line Marking Follow Up Actions

Posted on October 20, 2011 by

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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