Solving Sudoku: "Hidden Singles:
Very frequently, there is only one candidate for a given row, column or 3x3 box, but it is hidden among other candidates.
In the example on the right, the candidate 6 is only found in the middle right cell of the 3x3 box. Since every 3x3 box must have a 6, this cell must be that 6."
No comments:
Post a Comment