Tag Archives: naked subsets

Hidden Logic Symmetries of THLS


This post explains SudoRules’ complementary grid transformations that, as The Hidden Logic of Sudoku demonstrates in many Royle 17 examples,  converts hidden line subsets into naked line subsets, and box subsets into line subsets. Of possibly more interest to sysudokies, … Continue reading

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X-treme Hidden and Naked Treasures


This post features hidden and naked subsets in two Sudoku X-treme review puzzles. All occur in line markings. The first continues from the previous post. The X-treme 210 line marking features two naked triples. The first one breaks up a … Continue reading

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Sudoku Assistant Finds Locked Sets


This posts discloses several significant omissions in Hanson’s discussion of locked sets, including his examples, in the report, Sudoku Assistant – Solving Techniques. A subtle and sometimes bungled task in basic solving is the discovery of locked sets or subsets. … Continue reading

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