Tag Archives: swordfish

An Ardson Very Hard Workout


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

Posted in Advanced Solving, Puzzle Reviews | Tagged , , , , , , , , , | 2 Comments

More Satisfaction in Saturday 2


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

Posted in Advanced Solving, Puzzle Reviews | Tagged , , , , , , , | 4 Comments

THLS Limps In On Chains


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

Posted in Advanced Solving, Berthier | Tagged , , , , , , , , , , | 2 Comments

Advanced Solving with Arnold


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

Posted in Advanced Solving, Expert Reviews, Snyder | Tagged , , , | Leave a comment

Wex 429 is Sued


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

Posted in Advanced Solving, Puzzle Reviews, Weekly Extreme | Tagged , , , | Leave a comment

Sue Defeats the Slippery Wex 428


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

Posted in Advanced Solving, Puzzle Reviews, Weekly Extreme | Tagged , , , , , , , | Leave a comment

The Peter Gordon Fishing Guide


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

Posted in Advanced Solving, Expert Reviews, Gordon | Tagged , , , , , , , | Leave a comment