Category Archives: KrazyDad

Super Tough and Insane collections

KrazyDad Insane 425 Introduces Pattern Slicing


This post reports on the introduction of pattern slicing, a.k.a. the pink olive, in KD Insane v4, b2, n5 of 7/30/13. The method is defined, and demonstrated on the 3-panel of Insane 425. This review is being updated first, as … Continue reading

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The KD Insane 425 Boomerangs


This post reports on the introduction of spotting techniques for the boomerang ANL in the updated KrazyDad Insane v4 b2 n5. The cell based examples of this KD Insane review post of July 23, 2013 suggest the inclusion of both … Continue reading

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KD Insane 415 Updated


This post tells the story in the solving of Krazy Dad Insane v4, b1, n5, as reported in updated Sysudoku posts of 7/13/13 and 7/20/13. It’s one way that coloring and pattern analysis work together. Important features of Sysudoku Basic … Continue reading

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A Bifurcated Coloring of the AIC Slink


In this post, the AIC slink produces an alternative solution of a puzzle originally solved by a rather extreme pattern coloring analysis. This solution demonstrates how the AIC Slink enhances the already powerful technique of Medusa coloring. The July 11 … Continue reading

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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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