Tag Archives: grouped chains

Hodoku Chain Building


This post endorses Hodoku’s explanation of strong and weak links, regretfully confined to chains. His discussions of grouping and ALS nodes are supplemented for completeness. Hodoku graphic representation of chains by cell shading and candidate coloring is seen to be … Continue reading

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Nishio Forcing Chains?


 Resuming the series on forcing chains, this post reveals that the Nishio forcing chain introduced on Andrew Stuart’s sudokuwiki site  is yet another re-interpretation of the AIC toxic set, a.k.a. the eliminating almost nice loop(ANL).  Here we also assert that … Continue reading

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The SudoPod?


When I ran across, in http://www.sudowiki.org, Andrew Stuart’s treatment of a pattern he says is “poached straight from Sudopedia”, I thought  there must be a serious disagreement in the Sudoku community over the use of the term “Franken fish”.  Andrew’s … Continue reading

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