Sudoku is a mathematical puzzle and this is a computer version of it.
You can set the size of the grid (both rows and columns) up to a maximum of 9x9.
You can set the visibility percentage e.g. setting this to 50 will display half the numbers leaving you the remaining half to work out.
Each grid has at least one solution and should be different every time you play.
The seed value should be set to anything; it just helps to keep things random.
Click on a square and type a number to fill it in.
Once you have finished press escape and your correct answers will turn green and your wrong answers will turn red. Press a key and the computer's answers will be shown.
Let me know how you get on!
Download
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Screenshots
Start of 9x9 game
Computer's answers