01 How does the Sudoku solver work?

The “Sudoku Solver” function allows you to enter and solve classic 9*9 Sudoku puzzles.

For the input the desired field is tapped and a number from 1-9 is selected or the existing value is removed.

After entering the numbers, pressing the “Calculate” button calculates the Sudoku.
The button “Clear Calculation” deletes the calculated fields.
The button “Clear all” deletes the complete Sudoku including the entered numbers.