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USER NOTICE

You can still play the classic Flash version of Sudoku by clicking the "Play Classic" button above. Please be aware that Flash is being retired internet-wide December 2020. The great news is that the new Microsoft Sudoku version will continue to play far into the future. Give the new Sudoku a try by clicking the "Play Free Online" button above!

Play the number game that adds up to fun!

Use simple logic to fill in the puzzle's nine rows and nine columns with numerals 1-9. Each number can only be used once in a given row or column. Enter the correct number in every grid square to win! Sudoku has two modes: Pen and Pencil.

Click on the pen button, then left-click on a square and drag the cursor up and down to enter your "pen" answer. You can also type in the number. If you're not sure of an answer, you can select the pencil button instead. Mouse over a square and click on the number(s) you want to enter.

You can "pencil in" several guesses per square. Click on the hint button, located in the main menu, to see possible answers highlighted in red. You can also click on the progress button to see if you've made any mistakes.