Tag Archives: swordfish

Nakamoto 143 Avoids Extremes

Posted on April 7, 2020 by

Nakex 143, the eighth puzzle in the review, avoids AIC building with an outstanding exhibition of advanced techniques, and three subsets in basic line marking, including this naked triple. Two more show up in LM closing, the stage that examines … Continue reading →

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

A Coloring Tidal Wave Drowns Sufi 37

Posted on December 17, 2019 by

Here, Brian Challenger’s Super Fiendish 37 makes it to advanced, but with the bi-value field   inviting multi-cluster coloring, a systematically easy solving technique. There are some X-panel fruits to harvest first in the order of battle, before coloring closes the … Continue reading →

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

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 →

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

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 →

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

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 →

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

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 →

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

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 →

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