Category Archives: Basic Solving Procedures

Starting with slink marking to find all remaining candidates.

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

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

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

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

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

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

Bean’s Extremely Hard I


A review of Rebecca Bean’s 600 Extremely Hard Sudoku Puzzles with Answers begins with the review table and two puzzles, 7-6 and 12-6. The collection is mostly basic, with the half of them solved by the slink marking bypass. Puzzle … Continue reading

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

Dave Green’s Three Column Bypass 3-Fill


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

Posted in Basic Solving Procedures, Green | Tagged , , | Leave a comment

Ardson Not So Hard Ardv2 118


Ardson Very Hard v.2 118 shows off the basic steps, but can’t quite dodge the consequences. A good Sudoku basic workout, and reminding us of the joys of basic solving. Here is the basic trace, completing box marking with a … Continue reading

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

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 , , , , , | Leave a comment