Tag Archives: double common ALS-XZ

Strmckr’s Double Common ALS_XZ

This post translates an instructive example from “strmckr”, an expert forum contributor, and adds some observations about double common ALS_XZ.  Then Sudent comments on some Sudoku history that Strmckr included with his example. In his comments on the April 10 … Continue reading

Posted in Advanced Solving, Expert Reviews | Tagged , , , , , , | 1 Comment

A Chicken Chok’in Checkpoint on Unhidden Chains

This post checkpoints Royle 17-16774, a rare example in The Hidden Logic of Sudoku of conjugacy chains dealing with a monster cloud of candidates. The checkpoint also catches SudoRules dismembering a “useless” XY nice loop that somehow sneaked into THLS. … Continue reading

Posted in Advanced Solving, Berthier, Expert Reviews | Tagged , , , , , , , , , | Leave a comment