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Solution for Sudoku from newspaper or magazine.

Fill in the form and click on the Wizard button.

Step by Step

Free online Sudoku solver. © 2017 - 2020

Instruction wizard

Step by Step

Fill in the form and first check the Step by Step option to be able to solve the Sudoku box by box.

Wizard

Press the Wizard button to solve the Sudoku.

Play

Press the Play button for a new Sudoku. There are 85 Sudoku puzzles, which are shown randomly.


Sudoku solver

If you cannot solve a Sudoku yourself, you can solve the Sudoku with this Sudoku solver. Fill in the figures of the Sudoku, from the newspaper or magazine, first in the form and then press the Wizard button. You can also choose to solve the Sudoku digit by digit with the Step by Step function.

How is the Sudoku solver made

This Sudoku solver is made with PHP and has a 9 layer system. The possible options of each digit per cell are tracked in each layer. In layer 1, for example, all options of the number 1 per cell are tracked. Three functions have been built that check between the nine layers which combinations of the different digits per cell are possible.

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For example, the third cell in the first row: in layer 7 there is a 7 and in layer 9 there is a 9. The other layers are empty.


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