Tag Archives: Nikoli

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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Nikoli’s X-treme Sudoku


Here we begin a series of reviews that are a clinic on Sysdudoku basic solving skills. Each collection of the survey will be introduced, with several puzzles checkpointed by 2-D traces. This post introduces the Nikoli Publishing top toughy, the … Continue reading

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