* Load and Save Games
* Option to "Show only legal" cell values
* "Get a Hint" to show a square which can be determined without giving you the answer.
* "Take a Hint" will give the value for a cell if you still can't work it out. Sudoku Helper will even tell you the reason for the value.
* Unlimited "Undo" so you can "go back" if you do something silly.
If you find a problem (we know that there are some), let us know so that we can fix it.
