Monthly Archives: December 2017

Only Extreme 390 – a Fitting Finale

Posted on December 26, 2017 by Sudent

In this post, the last preselected Sudoku of the review, Only Extreme 390, is solved by only advanced methods, but by an extremely thin margin.  The first crack in the armor is an irregular XYZ-wing. At first I missed an … Continue reading →

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A Coloring Trial for Only Extreme 347

Posted on December 19, 2017 by Sudent

Here a Manuel Castillo Sudoku sends me directly to last resort city.  Although the bv field eludes productive XY-chains or AIC, coloring is decisive enough to solve 347 in a single trial. Your first view of the grid comes with … Continue reading →

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Dragging in Only Extreme 304

Posted on December 12, 2017 by Sudent

This post continues with three more trials, two to reach a solution, and one to guard against multiple solutions, in Castillo’s Only Extreme 304. This is getting reeeaallly extreme. Last week, we managed to extend and XY-chain across the grid … Continue reading →

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Definitely Extreme 304

Posted on December 5, 2017 by Sudent

This post encounters what seems to be a monster in Castillo’s Only Extreme 304. A stingy basic leaves a near monster cloud of candidates resistant to the ordinary advanced repertoire. Following a theme of this review, a small coloring cluster … Continue reading →

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