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Sudoku Help - Grid square details

Here's a page from the extensive help system for SudokuDragon. It is displayed as a help screen when running the program. To get the full picture Download our Sudoku Dragon and see the screen in its full context.

One particular square may be very important to solving a puzzle. Sudoku Dragon lets you add notes to any or all of the squares and also note your tentative exclusions or possibilities for each of them. Each square with an annotation is displayed with a special star in the bottom right corner. If you hover the mouse briefly over the 'star' then a tooltip giving the text of the annotation will be displayed. All square annotations are listed in the print report that the program can produce.

Tentative possibilities are a very important feature of Sudoku. They indicate what choices you have looked at and are possible or impossible for particular squares. You can select one of them by clicking on the appropriate check box. The first set are what you think is possible, the second set are for ones you consider not possible for a particular square. You can also change these possibilities by simply using CTRL+'number' keyboard shortcut. The setting of these squares is remembered, so if you change your mind then Undo will revert back to previous settings. This is very useful when tracing back the effects of an incorrect assumption of possibilities.

The square allocation details gives the other essential information about the Sudoku grid square - its grid address (row and column) as well as the currently allocated symbol as well as the reason it was allocated.