In sudoku puzzles you must complete the grid such that each row, each column and each 3×3 box contains the digits 1 to 9. There is no arithmetic involved: the solution can be found using logic and reasoning alone.
Press the Reset button to clear the puzzle back to the starting position; press the Hint button to get a suggestion for somewhere rewarding to study; press and hold down the Solve button to see the full solution.
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