Monthly Archives: May 2019

Only Extreme 390 is Advanced

Posted on May 28, 2019 by Sudent

This post finishes the updates on Manuel Castillo’s Only Extreme Sudoku with a less advanced OnEx 390.  This one is a better example of the Sysudoku XY Railway than was the original post. No trials were required in the ten … Continue reading →

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Sudokuwiki Solves Only Extreme 347 by AIC

Posted on May 21, 2019 by Sudent

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 Sudent

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 Sudent

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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