Monthly Archives: July 2013

Insane 425 Invokes Pink Olive Analysis


This post introduces a new technique based on limited pattern overlay (LPO).  I call it pattern slicing, or more whimsically, pink olive analysis.  In pattern slicing, strong links between candidates are chosen to divide enumerated patterns into disjoint sets. In this … Continue reading

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Medusa Cluster Merge by LPO Coloring


This post checkpoints a finish on Insane 415 and demonstrates a cluster merge by LPO with Insane 425, as part of a review of KrazyDad’s Insane collection on http://www.krazydad.com . I trust that you found something on the grid of a tamed … Continue reading

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The Insane Review Begins


This post begins my review of Jim Bumgardner’s toughest collection, the Insane level,  with a demonstration of cluster extension in Medusa coloring, via Limited Pattern Overlay, or LPO.  The puzzle is Insane v.4, b.5, n.5.  That is to say, volume … Continue reading

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Shortz’ Trickiest Bewares?


This post reports a second  review of a Will Shortz “Beware! Very Challenging” collection, this one from his Trickiest Sudoku.   When the first review of this series, presented as Shortz’ hardest,  revealed the Bewares to be at the sysudokie basic … Continue reading

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Shortz’ Ferocious Hall of Mirrors


This post recounts the solving of Beware 190, the review puzzle from Will Shortz’ collection book Ferocious Sudoku which has multiple solutions.  On another multiple solution puzzle, Frank Longo’s  Absolutely Nasty Level 4 puzzle 61(Review Snaps II 3/12/13), I used … Continue reading

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