Tag Archives: KrazyDad Insane

KD Insane Review Update is Completed


This post highlights the updates on the 2019 review of the  KrazyDad Insane collection on http://www.krazydad.com. In 2019, the collection continues to stand out as a challenge to human solvers, and a source of innovations.  Continued congratulations to Krazydad’s dad, Jim … Continue reading

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4X5 Holds Off LPO for a Pattern Trial


The KrazyDad Insane review now ends with another puzzle that frustrates Sudokuwiki, and drives me to a pattern trial. Fortunately the situation calls for the Limited Pattern Overlay process that I passed up in the update of Insane 495. LPO … Continue reading

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A Boomer Inspired Pattern Trial in 495


In the original review, KrazyDad Insane 495 was an example of Limited Pattern Overlay, but eluded a decisive solution by LPO. In this update, Stuart’s Sudokuwiki “runs out of known strategies”, but makes some spectacular plays, including an ALS boomerang … Continue reading

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KD Insane 485 One Clue Better


  The Sudokuwiki solution of Insane 485 is reported, starting with the ALS boomerang, but with an extra clue provided by a rare pattern trial. It so happens that one of the two candidates of the ALS 9-group belongs to … Continue reading

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Insane 455 Colors With Pink Olive Crayons


This post explores a relationship between pattern slicing and Medusa coloring, and develops a trial based on this relationship. After extreme resistance to advanced methods, KD Insane v4 b5 n5 falls prey to a coloring cluster generated by a strong … Continue reading

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An Insane 445 Pattern Slicing Demo


In this revised post, difficult line marking leaves a semi-monster. It is whittled down to a decisive double ANL, which can be duplicated instructively by pattern slicing.  The review puzzle, Insane volume 4, book 4, number 5, with thousands more, … Continue reading

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Insane 435 By Irregular XYZ and ANL


The third puzzle in a review of the KrazyDad’s Insane collection, Insane v.4, b.3, n.5,  succumbs to bv scan removals.  Some a bit unusual, but no new  ground broken.  The collection resides at http://www.krazydad.com . The updated basic trace includes … Continue reading

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