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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
Posted in Basic Solving Procedures, Puzzle Reviews, Shortz
Tagged hidden singles, line marking, Will Shortz Hard Sudoku
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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
Posted in Basic Solving Procedures, Puzzle Reviews, Shortz
Tagged line marking, Will Shortz Hard Sudoku
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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
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
Posted in Basic Solving Procedures, Expert Reviews
Tagged box marking, box/line, bypass, line marking, Richard Seemel, Sudoku Satisfaction
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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
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
Posted in Basic Solving Procedures, Green, Puzzle Reviews
Tagged 2-D Sudoku trace, bypass, Dave Green, line marking
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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
Posted in Basic Solving Procedures, Green, Puzzle Reviews
Tagged Bradley Hand ITC, Dave Green, line marking, slink marking bypass
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