Tag Archives: SASdC trial

Single Alternate Sue Unlocks ultrahardcore 223


This post reports how both review solvers run out of humanly practical options, and the arduous SASdC trial that unties the knot. At the halfway point of the review UHC 223 starts tough, conceding four clues in basic. Those 6f: to … Continue reading

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Ultrahardcore 47 Single Alternate SdC Trials


This post does the basics on the second Stefan Heine ultrahardcore right page under review.  Then it shows eight ways to do the five advanced moves up to forcing chains, two of them duplicated by boomerangs. It closes by  identifying … Continue reading

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Dragging in Only Extreme 304


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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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

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