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Tag Archives: irregular XYZ-wing
Cluster Extension by Not-Both Trials
In this post and the next, the first puzzle of the Manuel Castillo Only Extreme Sudoku review, Only Extreme 3, is taken ahead of the review of his Only Hard Sudoku. The reason is in the title. Rounding out the … Continue reading
The Limited XYZ-wings of THLS
The XYZ-wing is limited in The Hidden Logic of Sudoku, as it generally is in Sudoku literature, by a limited conception of the weak link. This post presents a resolution of Royle 17-12407 using an iXYZ-wing, a form of the … Continue reading
