Tag Archives: slink marking bypass

Hard Beware 125 Bypass

Posted on October 16, 2018 by

This post continues the review of 10 pre-selected Beware! Very Challenging puzzles from Will Shortz’ volume 1 of Hard Sudoku, with Beware 125. The review is a Sysudoku Basic Clinic, all being solved before candidates are completed and advanced methods … Continue reading →

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Chute Filling Beware 115

Posted on October 9, 2018 by

The second selection for the review of Will Shortz’ Hard Sudoku v.1 is Beware! Very Challenging 115. After a checkpoint on the Sysudoku Basic solution path, there is a brief report on the Guide’s Pattern Analysis page, now published in … Continue reading →

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World’s 36 and 200 Basic, and More on 25

Posted on May 8, 2018 by

In this post, checkpoint traces on World’s Hardest 36 and 200, and a direct comparison with  two Strmckr solutions to Worlds 25. Also, a Gordon Fick contribution to the cause. Here is Strmckr’s first solution, right out of line marking. It’s … Continue reading →

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Bookends of the Only Hard

Posted on September 19, 2017 by

This post checkpoints the only sysudokie bypass casualty and the only sysudokie basic survivor, in this second review of Manuel Castillo’s Only Hard Sudoku collection. The report of my first review was posted 1 ½ years ago, March 29, 2016. … Continue reading →

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Dave Green’s Three Column Bypass 3-Fill

Posted on July 18, 2017 by

This post traces the bypass solution of Dave Green’s Friday **** of July 7, 2017, an amazing follow up to my recent addition of 3-fill’s to the slink marking bypass. This puzzle, starting with  three column 3-fills among the givens, … Continue reading →

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Berthier’s Hidden Logic of Sudoku

Posted on October 18, 2016 by

This post begins a sysudokie reading of Denis Berthier’s weighty and challenging treatise on Sudoku, The Hidden Logic of Sudoku, or in this report, THLS. I start with an overview of the agenda of the book, which  differs greatly from … Continue reading →

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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 →

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