Tag Archives: line marking

A Hidden Single Dispatches Beware 165


This post continues a review of Will Shortz’ Hard Sudoku, v.1. with the sixth of ten pre-selected puzzles. Each one is resolved at the basic level. The detailed review requires time and patience,   but its value is the detailed examples … Continue reading

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Be Especially Aware 155


This post demonstrates how, in line marking, the partially line marked grid invites the error of using  an incompletely marked cell as a completely marked one. Every Beware in this review of Will Shortz’ Hard Sudoku v.1 highlights a different … Continue reading

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An Unexpected Challenge from TV Times


Sysudokie Sunday breakfasts were shaken up February 4 by the Sudoku in the TV Times, which unaccountably defied the bypass. Accustomed to dusting this one off as a warm up, many wound up with an unwelcomed cloud on the amply … Continue reading

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Touring the Bypass and a Human Engineered Inscription


This post continues the visit of Sudoku Satisfaction readers to Sysudoku with a demonstration of the slink marking bypass, line marking inscription, and basic subset spotting. How was lunch?  . . .  Good. OK, we’re ready to continue. Here is … 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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Green’s Labor Day Sunday 5-Star


The last Sudoku of Dave Green’s Labor Day Weekend, the Sunday 5-Star, has a challenging sysudokie bypass and line marking, barely staying within the lines of basic solving. Even on a ©PowerPoint grid, this puzzle would be a nightmare with … Continue reading

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Green’s Labor Day Weekend Workout


Here I checkpoint the bypass on the correct version of Dave Green’s 9/03/16 Saturday 4-Star, and assign my readers to try the bypass on his Sunday puzzle. The series of three demonstrates how the challenge and efficiency of the bypass … Continue reading

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