Category Archives: Basic Solving Procedures

Starting with slink marking to find all remaining candidates.

A Guide Update and a Funster Kick Off


The threat of a “The World’s Hardest Sudoku” now relieved, this post starts a review of the “extreme” section of Charles Timmermans Funster Hard to Extreme Sudoku. But mostly, it’s a progress report on the Guide, a set of pages … Continue reading

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Two More Basic Losses for the World’s Hardest


This post presents the review table, and basic traces of 46 and 188, two of the top rated ten puzzles of The World’s Hardest Sudoku Book. The puzzles were displayed on the last post. These two don’t make it to … 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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The Akron 2017 Championship Sudoku


This is another Sysudoku analysis of the championship puzzle of the Sudoku tournament put on by the Akron-Summit Public Library. It’s an annual tournament of four rounds, the last being a three person solve – off on poster board grids, … Continue reading

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Bookends of the Only Hard


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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A Well Hidden Pair in Only Hard 128


This begins a brief review of Manuel Castillo’s Only Hard Sudoku, preliminary to reviewing his more recent Only Extreme Sudoku. Both books are wordless collections of 400 puzzles, with identical formats. Thanks go to officers, members and guests of the … Continue reading

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David Badger’s 1001 Hard Sudoki


David Badger, a prolific composer of giant grid Sudoku puzzles, now has a giant book of 1001 standard size puzzles, self rated as “hard”. The publication date, listed in the back,  is June 17, 2017. Here is the standard Sysudoku … Continue reading

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