Tag Archives: color bridge

An xyt Color Wrap

Posted on February 14, 2017 by

In the spirit of Valentine’s Day, I come across a coloring resource in Berthier’s xyt chain. The elaboration of Royle 17-20565 in Chapter XVII of The Hidden Logic of Sudoku is a challenge in itself. By the theory of looking … Continue reading →

Posted in Advanced Solving, Berthier, Extreme Solving | Tagged , , , , , , , | 4 Comments

Berthier’s xyt-chains in THLS

Posted on February 7, 2017 by

Next we review the introduction of xyt-chains in The Hidden Logic of Sudoku. These are modified XY-chains which allow extra candidates in the chain cells, and unlike regular XY-chains, make eliminations regardless of whether the chain starting candidate is true … Continue reading →

Posted in Advanced Solving, Berthier, Extreme Solving | Tagged , , , , , , | 4 Comments

The ALS Jump Ball

Posted on June 2, 2015 by

The last review puzzle from the Weekly Extreme Competition, Wex 435, evades the Sue de Coq to give us: a precaution about grouped forcing chains in XYZ-wings, a genuinely extreme patterns trial, and an obvious form of ALS trial to … Continue reading →

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Smooth Navigation in Rocky Terrain

Posted on March 3, 2015 by

This post reports a sysudokie attack on Alary’s More Extreme 84 with several highlight eliminations. A naked triple and a combination X-panel punch on the tightly linked numbers lead to a polarity ANL, color bridging and a surprising color wrap. … Continue reading →

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LPO Color Trials on the Easter Monster

Posted on April 1, 2014 by

Unable to merge the corner clusters of the Easter Monster left by the opening volley, the previous post put four possible cluster merges on the trial docket, working from the solving grid of post 3/18/14. This post disposes of two, … Continue reading →

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Stephens’ Extremes Snaps III

Posted on June 18, 2013 by

This post finishes the  snapshots of significant solving events from Extreme review puzzles found in Paul Stephens’ books Mastering Sudoku Week by Week, and Sudoku Addict Workbook.   In the last post, we left Addicts 138 with removals you could follow … Continue reading →

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Bridging Coloring Clusters

Posted on May 29, 2012 by

With slinks left out of our Medusa coloring cluster, we can often form a significant second cluster, or maybe a third. Then the cluster colors interact through candidates of the same number that see each other or through colors of … Continue reading →

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