Tag Archives: almost locked sets

Sudoku Assistant’s ALS Toxic Sets


This post reviews Bob Hanson’s illustrations on ALS toxic sets, in Sudoku Assistant – Solving Techniques. For these illustrations, Hanson uses the bent naked n-set examples of the previous post. Strangely enough, this extreme economy brings insights. Bob Hanson designed … Continue reading

Posted in Advanced Solving, Expert Reviews, Hanson | Tagged , , , , , , , | Leave a comment

Enumerating the ALS-XZ


This post was revised in October 2015 to update the enumeration method for ALS  toxic pairs demonstrated in the previous post. Here I also checkpoint the basic solving of demonstration puzzle of Sudoku Maestro 8-9, Fall 2009. In the next, … Continue reading

Posted in Extreme Solving | Tagged , , , , , | Leave a comment