Category Archives: KrazyDad

Super Tough and Insane collections

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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An Insane Review is Completed


This post checkpoints the finish of the tenth and last review puzzle of the  KrazyDad Insane collection on http://www.krazydad.com.  I also have a summary table for comparison with previously reviewed collections, and some observations about this excellent collection.  My hat’s … Continue reading

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Grinding Down Insane 495 with LPO Coloring


In this concluding post on Insane 495, one of two clusters is expanded by several means, including color LPO and a nice loop, merging clusters and reaching a point where an easy trial color wraps it up.  Insane 495 is  … Continue reading

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LPO Lettering on Insane 495


Advanced methods are exhausted on Insane 495 as I review the Insane collection on http://www.krazydad.com.  Basic solving results were reported on the previous post. This post demonstrates a new combination of LPO pattern slicing and pattern conflict analysis that gets … Continue reading

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Verifying Sue de Coq Alternatives in Insane 495


This post embarks on the advanced solving of Insane 495, the ninth in a set of 10 puzzles preselected for a review of the KrazyDad  Insane collection on http://www.krazydad.com . So what did you turn up on the Insane 495 … Continue reading

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A Bridge Over Insane 485


Insane v.4 b.8 n.5, the eighth puzzle of a review of the KrazyDad Insane collection on http://www.krazydad.com,  had little left after Sysudoku basic solving.  XY chain ANL and a coloring bridge, supported by a cloud of bi-value cells, finishes it … Continue reading

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Pattern Trials of Insane 475


After a week’s technical delay,  let’s conduct our third trial on KrazyDad’s Insane v.4 b.7 n.5. The first two trials validated Sue de Coq chutes, removing candidates.  This is often necessary with tough puzzles, to verify that alternative values are … Continue reading

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