Tag Archives: XY ANL

A Colorful Ending to World’s Hardest 200


Here we translate into sysudokie notation the XY-chains and coloring that drag off World’s Hardest Sudoku 200, to its sudowiki solver solution. Hopefully you were better able to arrive at your own solution. First are the new developments on the … Continue reading

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The Bypass 3-Fill Smacks Diabolical 350


This post starts with a trace of the merciless 3-fill pounding of Ardson’s Sudoku Diabolical 350 in the bypass. Highlight grids from adv2 110 and 190 then follow. The 3-fill brings on the unit fill phase of basic solving, when … Continue reading

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Only Not Extreme 46


The review of Castillo’s Only Extreme collection continues with Only Extreme 46.  A very extensive bypass is survived, to leave very little to add in box marking, and an interesting line marking.  The rest is murder by the usual suspects … Continue reading

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Sadistic Sudoku Review


No, it isn’t a sadistic review. I’m reviewing Arnold Snyder’s Sadistic Sudoku collection of puzzles. Arnold’s solving advice, as presented in his “Sudoku Formula” books 2 and 3, will be analyzed in the following post. Two typical review puzzles are … Continue reading

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Insane 435 Knockout in the Third


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 blog ground broken.  The collection resides at http://www.krazydad.com . After sysudokie box marking … Continue reading

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Shortz’ Ferocious Falls Short


Here I have to report a surprisingly poor showing, as an advanced solving collection, of Will Shortz’ “Beware! Very Challenging” puzzles from his 2008 book, Ferocious Sudoku. Will Shortz collection books are by far the best known among U.S. Sudoku … Continue reading

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