Tag Archives: color bridge

An xyt Color Wrap

Posted on February 14, 2017 by Sudent

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 Sudent

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 Sudent

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 →

Posted in Advanced Solving, Extreme Solving, Puzzle Reviews, Weekly Extreme | Tagged , , , , , , , | Leave a comment

Smooth Navigation in Rocky Terrain

Posted on March 3, 2015 by Sudent

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 →

Posted in Advanced Solving, Alary, Extreme Solving, Puzzle Reviews | Tagged , , , , , , | Leave a comment

LPO Color Trials on the Easter Monster

Posted on April 1, 2014 by Sudent

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 →

Posted in Monster | Tagged , , , | 2 Comments

Stephens’ Extremes Snaps III

Posted on June 18, 2013 by Sudent

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 →

Posted in Advanced Solving, Puzzle Reviews | Tagged , , , , | Leave a comment

Bridging Coloring Clusters

Posted on May 29, 2012 by Sudent

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 →

Posted in Advanced Solving | Tagged , , , | Leave a comment

Coloring Checkpoints

Posted on May 24, 2012 by Sudent

This post contains checkpoints for my sysudokie friends following the blog on Maestro 50 and Maestro 4 On the Maestro 50 coloring: In the first coloring, 8’s in E and SE and 9 in SE, are trapped.  They all see … Continue reading →

Posted in Advanced Solving | Tagged , , , , | 1 Comment