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Tag Archives: color bridge
An xyt Color Wrap
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
Berthier’s xyt-chains in THLS
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
The ALS Jump Ball
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
Smooth Navigation in Rocky Terrain
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
LPO Color Trials on the Easter Monster
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
Stephens’ Extremes Snaps III
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
Bridging Coloring Clusters
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 color bridge, color clusters, color wrap, Medusa coloring
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