Tag Archives: naked triple

An XY Playground in Classic 72

Posted on March 12, 2019 by

James Forest’s Classic 72 delivers two rare birds, then gets tripped up by a Y-wing. The bypass threatens to take over, but leaves  an XY playground.       The line marked grid gives all of the Sysudoku Basic results. … Continue reading →

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Funster Extreme 46 Not So Much

Posted on August 7, 2018 by

The review of Charles Timmerman’s funster Hard to Extreme Sudoku continues with Extreme 46. It’s  entertainingly advanced. Extreme 46 has its moments.  The basic trace is spread across the page with 3-fill after 3-fill. Two unusual events occur in box … Continue reading →

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Coloring Wrings Out World’s Hardest 102

Posted on June 12, 2018 by

World’s 102 starts without ‘1’ givens and with two 3-fill lines. It winds up in a coloring trap expansion into a wrap. Basic makes progress in all three phases.               Making a hasty bv … Continue reading →

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A.D. Ardson’s Sudoku Diabolical

Posted on February 6, 2018 by

This post begins a brief review of A.D. Ardson’s Sudoku Diabolical, with a review table and analysis of the first of a pre-selected series 30, 70, . . . , 390. Ardson’s Sudoku Very Hard Puzzles, volume 2, very similar … Continue reading →

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Coloring Dominates Very Hard III-15

Posted on January 23, 2018 by

The review of Moito’s Road to Mastery Sudoku continues with another example of early coloring and its cooperative interactions with the X-panel. The advanced path is similar to that of Very Hard I-35 two posts back, but this time coloring … Continue reading →

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AIC Slinks Finish Only Extreme 3

Posted on September 5, 2017 by

This post continues the finishing coloring cluster expansion in Castillo’s Only Extreme 3, via not-both testing of AIC slinks.  After extending the blue/green cluster in the North bank via AIC slink, we continue with a second AIC slink adjoining the … Continue reading →

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Ardson Very Hard v.2 198 and 238

Posted on May 23, 2017 by

The review of A.D. Ardson Very Hard Puzzles v.2 continues with Ardv2 198 and 238. The sysudokie resolution to 198 is a rerun of 158, but 238 is a classic remote pair example. Ardv2 198 barely escapes the bypass, but … Continue reading →

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