Naked and concealed singles are the easiest squares to resolve. A unadorned solitary is each time a selection can only go in one attainable mobile. A concealed solitary is when There may be only cell for your presented candidate. For just about any questions, or if you discover a bug, https://sudokuhard-hardsudoku19887.blog5.net/68222418/helping-the-others-realize-the-advantages-of-sudoku-hard-hard-sudoku