Category Archives: Puzzle Reviews

Reviews of preselected puzzles from published collections. Summary review table, and highlight analysis.

Sudokuwiki Solves Only Extreme 347 by AIC

Posted on May 21, 2019 by

In the original Only Extreme review, OnEx 347 was an example of a coloring trial on a limited cluster generated by pattern analysis. In this update, Andrew Stuart’s solver demonstrates a solving path to a final coloring without trials, via … Continue reading →

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Only Extreme 304 Scavenger Hunt

Posted on May 14, 2019 by

This post finishes the updated review of Only Extreme 304, displaying the Sudoku moves listed last week for the scavenger hunt. The ALS X-chain boomerang starts with the 9-chain emerging from r9c7 and terminating on the 9 candidate of ALS … Continue reading →

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Only Extreme 304 is AIC Level

Posted on May 7, 2019 by

This post and the next update Castillo’s Only Extreme Sudoku review with a solution of OnEx 304 without trials. Most of the solution path is in AIC building, the most challenging level of Sysudoku Advanced. The only move prior to … Continue reading →

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Classic 216 Bypassed and Only Extreme 132 Demoted

Posted on April 23, 2019 by

This post adds another bypass solving to the review of James Forest’s Classic Sudoku, Classic 216. Then a report on an update of the 10/24/17 post on Castillo’s Only Extreme 132, in which a hard, but indecisive not-both trial leads … Continue reading →

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Classic 192 and Updated Only Extreme 3

Posted on April 16, 2019 by

First, a Basic trace of Classic 192. It can be solved in the bypass. In this post, James Forest’s Classic 192 is traced down in Basic. Then there’s a second Advanced level solution of Manuel Castillo’s Only Extreme 3, the … Continue reading →

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Classic 168 and Updated Only Extreme 89

Posted on April 9, 2019 by

James Forest’s Classic Sudoku 168 is a Basic level challenge.  In this post, the Classic review is continued with the 168 box marked grid, and a basic trace carrying through the collapse on the second line of line marking. Then … Continue reading →

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A Colorful Finish on Classic 144

Posted on April 2, 2019 by

This post continues the solution of James Forest’s Classical Sudoku 144. The boomer parade pauses for a pair of AIC  ANL.  This one uses reversed bv to switch from 2-chain to 8-chain and back again.           … Continue reading →

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