TOP SUDOKU HARD - HARD SUDOKU SECRETS

Top sudoku hard - hard sudoku Secrets

Naked and concealed singles are the easiest squares to resolve. A unadorned single is every time a quantity can only go in a single possible cell. A concealed single is when You can find only cell for a presented candidate.​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​�

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