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Programming Update Wednesday, January 18th, 2006
Chisai Sudoku
Update by Clayton
  Read this article in       
Chisai Sudoku
Version 1.2.2

Download Now!


Welcome, bienvenido, bienvenue, 歓迎 and willkommen to the Chisai Sudoku page!

Chisai Sudoku is a freeware sudoku game for Windows that I wrote because I like Sudoku and wanted to see how it's done. Lucky for you that I'm a generous soul and have decided to part with this free of charge! No ads, viruses or spyware (because I hate that stuff)! 100% free!

If you don't know what Sudoku is, click here.

Please leave a post in the Chisai Sudoku forum. I welcome all comments, questions, suggestions, and insults!


Clayton Rumley

PS - If you like the game and find yourself playing it a lot, why not throw a few dollars my way and let me know that I'm doing a good job?

Chisai Sudoku Screenshot

Game Features

  • 2,147,483,647 board configurations to play
  • Three levels of difficulty
  • Built-in tutorial shows you how to play the game
  • Built-in AI engine to help you when you're stuck
  • Ability to pencil in any combination of 1-9 in a square
  • Fully playable with mouse or keyboard (or both at the same time!)
  • Visual Cross Hatching
  • The game board resizes with the game window
  • Ability to fill a blank game board with your own values and have the AI engine solve it (if it is solvable)!
  • Customizable colours to make the game look the way you want it to

System Requirements

  • Windows 98 or higher
  • Microsoft .NET Framework 1.1 (available Here)
  • A monitor to see the game with
  • A mouse or keyboard to play the game with

Installation Instructions

  • Click here to download Chisai Sudoku
  • If prompted to save or open the file, choose "Save". Save it to a place that you can easily find.
  • Once downloaded, extract the file and run setup.exe. If you have a previous version of Chisai Sudoku installed, it will be automatically replaced by the installer (but it will remember your settings).
  • Play the game

Version History


  • Corrected bug with regional date conversion when checking for updates


  • Added hotkey 'P' to toggle between Pencil and Pen mode
  • Ctrl+Number pencils that number in when
  • Alt+Click toolbar toggles crosshatching for that value
  • Fixed minor menu bug
  • Corrected minor bug in Hint engine
  • Added the Beg Screen


  • 3 different kinds of animated background images to choose from!
  • 3 different visual modes of play: Arabic Numerals, Japanese Numerals, or Coloured Circles!
  • Top Ten fastest games for each level of difficulty kept in the High Scores window!
  • Games saved in .csg format remember the game clock
  • Optional toolbar added for mouse-lovers
  • Corrected minor bug in Hint engine
  • Changed "Hilight Incorrect Values" menu to "Hilight Conflicts". This option now simply hilights any squares that conflict with another square in the same row, column, or region.


  • Added option to disable automatic update checking (via the preferences dialog)
  • Added unlimited undo/redo support to the game board
  • Updated installer's greeting message
  • Added link to the Version Update information (i.e. this page) on the "Check for Updates" window


  • Added Print and Print Preview functionality
  • Added ability to copy and paste ASCII gameboards from the clipboard
  • Added ability to save and load ASCII text files
  • Added automatic and on-demand check for updates of the game
  • Corrected a minor display bug with the gameboard
  • Changed how settings are stored in the registry to be more compatible with future version releases


  • Original release
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