Sudoku Checker 4+

For your hand-made Sudoku

Atsuo Kazama

Designed for iPad

    • 4.0 • 3 Ratings
    • Free



Do you know sudoku?

It's a free tool to verify that your own Sudoku question.
You can check it by clicking the [Verify] button and get difficulty.

When launched, an empty number place table will appear.
At first everything is "?".
Enter the number of your own number place here.
The entered numbers are displayed in black.
If there are numbers that can be derived from the entered numbers, they will be displayed in gray.
After completing the input, touch the [Verify] button to obtain the results.
・ When only one solution can be derived
・ When there are multiple solutions
・ When contradiction occurs
The results are shown in the three dialogs of.

At the moment, the ability to load your own number places with your camera and to capture from photos is not yet implemented.

Display the ad at the bottom of the screen.

What’s New

Version 1.3.3

Version 1.3.3 has the following modifications to 1.3.2.
・ The recognition sensitivity of the Sudoku technique called XY-Wing is increased.
・ The recognition sensitivity of the Sudoku technique called XYZ-Wing is increased.
・ We are increasing the recognition sensitivity of the Sudoku technique called the Hidden Triple.
・ We are increasing the recognition sensitivity of the Sudoku technique called skyscraper.
・ The recognition sensitivity of the Sudoku technique called swordfish is increased.

Version 1.3.2 fixes the following bugs in 1.3.1.
-Sometimes I couldn't recognize the Sudoku technique called X-Wing.
-The X-Wing level and the Hidden Triples level are displayed in the difficulty nest display dialog.

Version 1.3.1 fixes the following bugs in 1.3.0.
-Sometimes it freezes while entering numerical values.

Version 1.3.x has revised the calculation logic of the difficulty level.
Previously (up to Version 1.2.x), the difficulty level was high when the number of hints was small, or the difficulty level was less than 300 even though advanced techniques were required.
Therefore, the calculation logic is revised.
The basic functions are the same as before.
You can also call the calculation result of the past calculation logics.

Ratings and Reviews

4.0 out of 5
3 Ratings

3 Ratings

Johnny1649 ,


The only things it needs is image and photo recognition so that I don't have to type in all the individual numbers after I solve a sudoku puzzle on paper.

jckkkdbfvejsjd ,

I’m confused

What does there’s a contradiction mean

App Privacy

The developer, Atsuo Kazama, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More

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