Tag Archives: naked triple

Ultrahardcore 47 Single Alternate SdC Trials

Posted on July 21, 2020 by

This post does the basics on the second Stefan Heine ultrahardcore right page under review.  Then it shows eight ways to do the five advanced moves up to forcing chains, two of them duplicated by boomerangs. It closes by  identifying … Continue reading →

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Super Fiendish 17 and 27

Posted on December 10, 2019 by

Two of Brian Challenger’s Super Fiendish, 17 and 27, are put together because solution paths are short. Stage right is the Sufi 17 line marked grid with an immediate, and decisive, XY nice loop. The follow up features an early … Continue reading →

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Tracking a Patterns Game Entry

Posted on November 19, 2019 by

This post and the next explore two entries in the online Sudoku composing contest known as the “Patterns Game”. The contest is between Sudoku composers:  who can submit first puzzles with unique solutions that fit a “pattern” of givens issued … Continue reading →

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Another Dave Green Sysudoku Basic Workout

Posted on October 8, 2019 by

This post details  another Sunday Dave Green 5-star coming ever so close to breaking the limit that Dave seems to impose on his Sunday puzzles. It appeared in the 9/15/2019 edition of the Akron Beacon Journal. My grid is unimpressed … Continue reading →

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PencilPress Extreme 57 and Two Master Classes

Posted on September 3, 2019 by

Three more Basic victories are reported here with interesting traces. Looking ahead, the blog is heading toward more advanced collections, with this series being the final statement on Sysudoku Basic. Ppbr 57 starts remarkably like ppbr49. C1 makes a wall … Continue reading →

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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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