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The goal of Sudoku is to fill a 9x9 grid so that each column, each row, and each of the nine 3x3 boxes contains the digits 1 through 9.
For a history of the puzzle and some basic solving strategies, see the Wikipedia article.
All Smoresoft Sudoku puzzles have only one solution and can be solved with pure logic. No guessing required!
See the Smoresoft Sudoku instructions.
The trial version is limited to the puzzles included in the free trial puzzle pack.
The full version allows you to play hundreds of high quality puzzles from the collection of puzzle packs on this site and enter your own puzzles from other sources such as books and newspapers.
Click the "Buy Now" button on the Smoresoft Sudoku home page to purchase a registration code. Smoresoft uses PayPal to accept payments.
Be sure to provide a valid e-mail address to PayPal!
We'll send your registration code and instructions to the e-mail address you specify immediately upon receiving payment notification from PayPal.
Download and install the latest version of Smoresoft Sudoku to ensure you have all the latest features. You need version 1.3 or later to be able to register.
No, you can use any major credit card without a PayPal account. Click the "Buy Now" button and look for the link under "Don't have a PayPal account?".
Exit the game and restart it. Enter your registration code at the prompt. For more details about the registration process, see the Registration FAQ.
That's because you're still playing the "Trial" puzzle pack.
Download new puzzle packs, choose "Open..." from the game menu, and select the puzzle pack you'd like to play.
Download and install additional puzzle packs from the Puzzle Pack download page.
Choose "Open..." from the game menu and select the puzzle pack you'd like to play.
See the Smoresoft Support page.
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