Monthly Archives: March 2012

What Regular Fish to Fish For


Come let us reason together about regular fishing, i.e. finding X-wings, swordfish, or jellyfish on an X-panel .  We look at sets of lines in one direction, then the other.  Rows and columns.  We seek a set of n lines … Continue reading

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Kraken Fish and Sashimi Fish


As we round the corner in our aquarium tour, the label on the n The aquarium tour continues with two additional fish, and how ER/forcing chain “seeing” applies to them. As we round the corner in our aquarium tour, the … Continue reading

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Go Fish!


This post defines Sudoku fish and previews the regular and exotic forms of this elimination technique.  This two-post tutorial takes the form of a tour through an aquarium. It’s economics.  In Sudoku fish, candidates of a single number X compete … Continue reading

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XY-Loops


Denis Berthier in his Hidden Logic of Sudoku,  makes the statement that XY-loops are worthless.  Since we had such productive fun drawing curves through the bv cells – including XY-loops – back in the posts of December 2011, I should explain why sysudoku … Continue reading

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