Tag Archives: swordfish

An Ardson Very Hard Workout

Posted on April 25, 2017 by

This post checkpoints Ardv2 78, the second review puzzle in A.D. Ardson’s Sudoku Very Hard collection. The puzzle skates by basic and the bv scan, but is tamed on the X-panel. Along with regular collection reviewing posts, I’m revising the … Continue reading →

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More Satisfaction in Saturday 2

Posted on April 4, 2017 by

This post completes the last hour of the Satisfaction Sudoku tour of Sysudoku, with alternative solution paths beyond the bv scan in Saturday 2. It features a finned X-wing, a coloring wrap, and an alternative freeform pattern analysis with a … Continue reading →

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THLS Limps In On Chains

Posted on January 24, 2017 by

This post identifies the conjugacy chain, the last fundamental chain type to be introduced in The Hidden Logic of Sudoku, as a weakened X-chain.  Since the last few chapters introduce extensions for XY chains, it becomes clear that THLS is … Continue reading →

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Advanced Solving with Arnold

Posted on August 11, 2015 by

This post reviews the 54 pages of Arnold Snyder’s Sudoku Formula 3 devoted to advanced solving techniques. These are sandwiched between 35 pages that repeat his Sudoku Formula 2, and 19 pages on how to get the solution by arbitrary … Continue reading →

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Wex 429 is Sued

Posted on April 21, 2015 by

In the review of a sequence of 10 Weekly Extreme Competition puzzles, Wex 429 is toppled by an easily verified Sue de Coq. The post begins with a checkpoint for the reader’s own solution of Wex 428 by single alternate … Continue reading →

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Sue Defeats the Slippery Wex 428

Posted on April 14, 2015 by

The third Weekly Extremes review puzzle is another rewrite, in which an extreme level pattern analysis is made unnecessary by an advanced technique overlooked at first reading. Taxes in? On the review, Wex 428 was easy on us through basic … Continue reading →

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The Peter Gordon Fishing Guide

Posted on December 2, 2014 by

We leave November and basic solving with a review of Peter Gordon’s advanced solving recommendations in his Mensa® Guide to Solving Sudoku, now re-issued as the PuzzleWright Guide etc. After a brief summary of the Guide’s general failings, this post … Continue reading →

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