Tag Archives: naked triple

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 →

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

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 →

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

Ardson Not So Hard Ardv2 118

Posted on May 2, 2017 by

Ardson Very Hard v.2 118 shows off the basic steps, but can’t quite dodge the consequences. A good Sudoku basic workout, and reminding us of the joys of basic solving. Here is the basic trace, completing box marking with a … Continue reading →

Posted in Basic Solving Procedures, 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

An xyt Color Wrap

Posted on February 14, 2017 by

In the spirit of Valentine’s Day, I come across a coloring resource in Berthier’s xyt chain. The elaboration of Royle 17-20565 in Chapter XVII of The Hidden Logic of Sudoku is a challenge in itself. By the theory of looking … Continue reading →

Posted in Advanced Solving, Berthier, Extreme Solving | Tagged , , , , , , , | 4 Comments

Sadistic Sudoku Review

Posted on July 28, 2015 by

No, it isn’t a sadistic review. I’m reviewing Arnold Snyder’s Sadistic Sudoku collection of puzzles. Arnold’s solving advice, as presented in his “Sudoku Formula” books 2 and 3, will be analyzed in the following post. Two typical review puzzles are … Continue reading →

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

Alary at His Stingiest

Posted on February 24, 2015 by

This post details the solving of the Antoine Alary review puzzle More Extreme 104, featuring a laborious line marking leading to a sea of candidates. Then the day is saved by Antoine’s escape hatch, maintaining a reasonably advanced level of … Continue reading →

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