Tag Archives: Only Extreme Sudoku

Only Extreme 218 by SASdC Trial


This post demonstrates the Single Alternate Sue de Coq with Castillo’s Only Extreme 218. The opportunity for this kind of trial is spotted early in the bv scan, but is best deferred until it is needed as a last resort. … Continue reading

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

Only Extreme 218 Straight Up


Barely escaping the bypass, Manuel Castillo’s Only Extreme 218 gets tough, and brings out some seldom used methods. An alternative trial path by Single Alternative Sue de Coq, normally held in reserve,  follows in a second post. The bypass filled … Continue reading

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

Almost Extreme 175 Tags Five Advanced Bases


This post reaches the halfway point in the review of Manuel Castillo’s Only Extreme collection, with Only Extreme 175. A double UR, a regular Sue de Coq and irregular XYZ-wing prepare the bv field for coloring, and an XY chain … Continue reading

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

Only Extreme 132 Joins the Extreme Team


Another payoff for expansion of a limited coloring network via AIC slink. It’s an extreme tactic that, after six years of blogging, I finally blundered my way into.  This collection illustrates the not-both trial thoroughly. Please comment if you know … Continue reading

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

Only Extreme 89 Guilty on Two Counts


The Only Advanced 46 is followed by a truly Extreme 89. Two different unique Sysudoku trials lead to the same result. The Single Alternate Sue de Coq is deferred, but after advanced techniques fail, it is used.  An equally extreme … Continue reading

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

Only Not Extreme 46


The review of Castillo’s Only Extreme collection continues with Only Extreme 46.  A very extensive bypass is survived, to leave very little to add in box marking, and an interesting line marking.  The rest is murder by the usual suspects … Continue reading

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

Fick’s Advanced Path on Only Extreme 3


In the pre-review post of August 29, Cluster Extension by Not-Both Trials, a series of coloring cluster expansions were made by testing the not-both condition for AIC slink coloring. Like other trials, this tactic is considered extreme here in Sysudoku. … Continue reading

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