Sudokuwiki.org's Weekly 'Unsolvable' Sudoku #642
In this post I'll be tackling the weekly "Unsolvable" puzzle from SudokuWiki . This week's puzzle was provided by Richard Kröger.
Posts
Dual AALS link
In this post I will showcase a rather interesting interaction between two AALS that share a cell. This came up within an SE 8.3 puzzle I was solving and delighted me with its simplicity and its practicality (it immediately reduced the puzzle to basics). It is very similar to Sue de Coq. I'm sure it's known but I've never seen it brought up before. Typically when chaining off AALS, the easiest option tends to be to use region-wise interactions with ALS weakly linking 2 candidates at once.
Sudokuwiki.org's Weekly 'Unsolvable' Sudoku #640
In this post I'll be tackling the weekly "Unsolvable" puzzle from SudokuWiki . This week's puzzle was provided by Richard Kröger, as with last week's.