TruHealth

Sudoku

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Rules

Sudoku is a puzzle based on a small number of very simple rules:

Every square has to contain a single number

Only the numbers from 1 through to 9 can be used

Each 3×3 box can only contain each number from 1 to 9 once

Each vertical column can only contain each number from 1 to 9 once

Each horizontal row can only contain each number from 1 to 9 once