Tag Archives: naked quad

A Challenging Exercise in Sysudoku Basic


This post begins a review of Will Shortz’ Hard Sudoku, v.1.  The review details the solution of a pre-selected 10 puzzles from the “Beware! Very Challenging” section of that book. Nearly all Shortz puzzles reviewed in Sysudoku are solved in … Continue reading

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Coloring Bails Out Basic on III-34


In this last post of Moito’s Sudoku Road to Mastery, Basic drives the 0.91 rated III-34  into a near BUG blind alley with a flurry of subsets and boxlines, then hands off to coloring for a quick score. A tight … Continue reading

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Ardson Not So Hard Ardv2 118


Ardson Very Hard v.2 118 shows off the basic steps, but can’t quite dodge the consequences. A good Sudoku basic workout, and reminding us of the joys of basic solving. Here is the basic trace, completing box marking with a … Continue reading

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An xyt Color Wrap


In the spirit of Valentine’s Day, I come across a coloring resource in Berthier’s xyt chain. The elaboration of Royle 17-20565 in Chapter XVII of The Hidden Logic of Sudoku is a challenge in itself. By the theory of looking … Continue reading

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Just One More “More Extreme”


This post concludes the Alary More Extreme review puzzles with More 144, Basic marking features a timely naked quad, and advanced solving is another parade of highlights. The basic trace classifies More Extreme 144 as a tough one. I would … Continue reading

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Just One More Dave Green


Here we savor one more basic solving 5-star gem by Dave Green, appearing in my paper, the Akron Beacon Journal, October 19, 2014. My plan was to conclude the Dave Green portion of the Sysudoku basic solving clinic with the … Continue reading

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