Monthly Archives: October 2020

Ultrahardcore 267 Downed By An SASdC Surprise


After two interestingly matching sequences in this post, Sudokuwiki and Beeby toss in their towels. This allows an exploration of an offbeat version of the exclusively Systematic Sudoku Single Alternative Sue de Coq. The trial formulation is different, and the … Continue reading

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A Coloring Merge Overwhelms Heine’s ultrahardcore 223


Continuing from last week’s post, Beeby’s  parade of ALS chains merges the clusters and a near BUG (Bi-Value Universal Grave) wrap finishes UHC 223. Beeby does an ALS_12 with an aligned Z value group in r1 and a single Z … Continue reading

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Beeby Carries UHC 223 to a Second Cluster


This post reports how the Beeby solver comes to life after the Single Alternate Sue de Coq trial , and nibbles Heine’s ultrahardcore 223 to a second coloring cluster. Beeby notes the ANL isas a simple chain, but it’s AIC … Continue reading

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Single Alternate Sue Unlocks ultrahardcore 223


This post reports how both review solvers run out of humanly practical options, and the arduous SASdC trial that unties the knot. At the halfway point of the review UHC 223 starts tough, conceding four clues in basic. Those 6f: to … Continue reading

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