SudokuGuru is program which not only enables you to play Sudoku on your PC but will also explain how to solve each puzzle if you get stuck! The full version of the program has the following features:

• A virtually unlimited supply of puzzles.
• 6 levels of difficulty.
• Use pencil marks to help solve the more difficult puzzles.
• Enter your own puzzle or a puzzle from a newspaper and play it as a normal game.
• Print out puzzles to play on paper.
• Load/Save game feature.
• Ask for help - the program will give you a hint or will solve the whole puzzle.
• Get a step by step explanation of the logic used to solve each box.
• Full undo history so you can backtrack through your game.

If you have a valid promotion code then enter it in the box to the right and you will receive a 20% discount (i.e. the activation code will only cost you $6.39). How do I get a promotion code?