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Monthly Archives: September 2020
Two Clues and Pattern Coloring Beat 179
This post carries a pair of clues, gained a trial of an alternative pair of clues, to a solution to Stefan Heine’s ultrahardcore 179. The resolution requires a pattern analysis on the 5-panel, aided by two coloring clusters. Going back … Continue reading
A Partial Pattern Trial on ultrahardcore 179
This post starts with the 5-panel freeform analysis to compare with yours and then moves on with the partial pattern trial suggested in the last post, of 8 patterns containing 8r2c9. My 5-panel patterns are much less promising than the … Continue reading
Preparing a Pattern Trial on UHC 179
This post does Basic and reports humanly practical results from the two review solvers on ultrahardcore 179. Then for a stall breaking trial, we turn to the limited value patterns, and their discovery through the X-panel view and freeform drawing. … Continue reading
A Pattern Trial Defeats ultrahardcore 135
This post reports on the value pattern trial of the last post, its results, and the relatively easy march to a two cluster coloring solution of Stefan Heines ultrahardcore 135. The trial starts with the three 7 clues and naked … Continue reading
Deeby Hauls ultrahardcore 135 into Court
In this post, Beeby leads the way, but the instructive methods bring us only to a partial value pattern trial. The trial date is next week. After the usual slink marking Sysudoku basic, ultrahardcore 135 has a busy … Continue reading
Systematic Sudoku 