Tag Archives: Ardson Sudoku Diabolical

Ardson’s Toughest, Even Slightly Diabolical, 310


This post fleshes out the review table entry, and checkpoints the two week homework assignment of the Ardson Sudoku Diabolical v.1. The early coloring typical of the review is helpful, but not decisive. In the bypass, the 3-fill menace is … Continue reading

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The Bypass 3-Fill Smacks Diabolical 350


This post starts with a trace of the merciless 3-fill pounding of Ardson’s Sudoku Diabolical 350 in the bypass. Highlight grids from adv2 110 and 190 then follow. The 3-fill brings on the unit fill phase of basic solving, when … Continue reading

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A.D. Ardson’s Sudoku Diabolical


This post begins a brief review of A.D. Ardson’s Sudoku Diabolical, with a review table and analysis of the first of a pre-selected series 30, 70, . . . , 390. Ardson’s Sudoku Very Hard Puzzles, volume 2, very similar … Continue reading

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