With SudokuFix you get the benefits of a great interface:

• Instant feedback lets you know if you're on the right track
• Row/column highlighting makes it easier to see relevant clues
• Play the game with only your mouse. No need to use the keyboard:
  • Right-click to make a selection
  • Left-click to set or clear pencil-marks for tracking possible choices

• Print SudokuFix game books to take on the road
• Thousands of puzzles in the full version
• The Fiendish level; for when Sudoku with numbers isn't enough
• Online Competition with the Daily Challange Game
• Video Tutorials to help you learn the software and the game