Tag Archives: Bob Hanson

Strmckr’s Double Common ALS_XZ


This post translates an instructive example from “strmckr”, an expert forum contributor, and adds some observations about double common ALS_XZ.  Then Sudent comments on some Sudoku history that Strmckr included with his example. In his comments on the April 10 … Continue reading

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Please Give WXYZ Some Space


This post takes issue with recent redefinitions of the WXYZ-wing It suggests a name for Andrew Stuart’s update, apparently proposed by StrmCkr, and recalls the Bob Hanson’s Bent Naked N-set method in Student Assistant. The derivation of the toxic set … Continue reading

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Harvest from the Assistant Report


This post summarizes what led to the review of Bob Hanson’s web report on his Sudoku Assistant, and what was gained from it. There is also an instructive checkpoint on a T&E method endorsed in the report. I’ve been on … Continue reading

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Trial or Error?


This post compares Sysudoku trial strategy with the chain or disproof hypothesis strategy described in Bob Hanson’s Sudoku Assistant report. My opinion is that Bob’s strategy contributions and his Sudoku Assistant solving records are both compromised by a willingness to … Continue reading

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Hanson’s Strong and Weak Hinges


Continuing our intense review of Bob Hanson’s web report on Sudoku Assistant, I found no useful additions to the Sysudoku repertoire in the next few sections, so they just get a mention in passing. Then we examine Bob’s simple but … Continue reading

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Hanson’s Polarity ANL


This post reviews the section of Bob Hanson’s Sudoku Assistant report titled Almost- Locked Ranges. It presents an effective solving idea, but with hazy definitions and a confusing name. Here I identify this idea as a familiar one in the … Continue reading

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Suset Sashimi


This review of Hanson’s Sudoku Assistant shows that his grid ALS discovery algorithm, which I have long used as a scratchpad algorithm for human solvers, is very good at finding effective finned fish and kraken fish, particularly sashimi. Readers were … Continue reading

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