Tag Archives: line marking

A Hidden Single Dispatches Beware 165

Posted on November 13, 2018 by

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 , , | Leave a comment

Be Especially Aware 155

Posted on November 6, 2018 by

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 , | Leave a comment

An Unexpected Challenge from TV Times

Posted on February 27, 2018 by

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 →

Posted in Basic Solving Procedures, Puzzle Reviews | Tagged , | Leave a comment

Touring the Bypass and a Human Engineered Inscription

Posted on March 21, 2017 by

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 , , , , , | Leave a comment

An xyt Color Wrap

Posted on February 14, 2017 by

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 →

Posted in Advanced Solving, Berthier, Extreme Solving | Tagged , , , , , , , | 4 Comments

Green’s Labor Day Sunday 5-Star

Posted on October 11, 2016 by

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 , , , | Leave a comment

Green’s Labor Day Weekend Workout

Posted on October 4, 2016 by

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 , , , | Leave a comment