Sudoku

Download a free Sudoku player with hundreds of puzzles

Sudoku is a puzzle in which players insert the numbers one to nine into a grid consisting of nine squares subdivided into a further nine smaller squares in such a way that every number appears once in each horizontal line, vertical line, and square.

The name “sudoku” is abbreviated from the Japanese suuji wa dokushin ni kagiru, which means “the numbers (or digits) must remain single.”

Here is a typical Sudoku puzzle:

sudoku grid, unsolved

The digits given at the beginning are the clues you would use to solve the puzzle. A properly formed puzzle has one (and only one) unique solution.

In order to solve the Sudoku puzzle, we must place the digits 1-9 in each row of the grid, each column of the grid, and in each of the 3x3 outlined blocks shown above. There must not be any duplicate numbers in a row, column, or any of the outlined 3x3 grids.

So, if we look at the 5 in the upper left corner of the puzzle, we can know from that clue there are no more 5's in row 1, no more 5's in column 1, and no more 5's in the upper left 3x3 block.

I invite you to download and try this game for free. All that I ask is that if you like it and plan to play it in the future that you donate a few bucks to me. Visit the Donation Page for details on how to send me a donation.

I sincerely hope that you have as much fun solving these puzzles as I do!

Download Now* - Screenshot - Help File - Donate Now

*This program doesn't currently have an installer. Just save it on your desktop, right-click on the zip file and choose "Extract all" from the menu. Double-click the Sudoku program to run it. Enjoy!

REQUIREMENTS - This program runs on Windows 10+ (so, yes, Windows 11 is good), it needs a mouse (or touch screen) to select cells, and a keyboard (optional).

The .NET 9 library from Microsoft is also required. If you run the program and don't have .NET 9 installed, you will be prompted to install it:

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