Possibility Toolbar [Page 9 of 15])

Showing all the Sudoku possibilities at once can be useful when looking for squares that are easy to solve, the full information is too much to take in at once.

Sudoku Dragon has a Possibilities toolbar so that only certain square possibilities are shown. This is useful in conjunction with the program's other View | Options. The Possibility toolbar is conveniently displayed just above the grid. You can also select a number in the bar by pressing the ALT key and the number. Showing all automatic possibilities is available by clicking on the first star ( ) option on the bar (or the F4 function key).

You can select one particular symbol to be highlighted with all possible occurrences of that number (or letter) shown in the Sudoku grid.

The bar highlights the number of squares remaining for each number. The colored box behind the number '1' indicates there is only one remaining '1' that needs to be allocated in the grid. The smaller cream boxes behind the '4' and '5' indicate that each of these has two squares left somewhere in the grid.

In this screen shot '5' been selected in the possibility bar has so that all currently allocated '5' are highlighted and the automatic possibility settings are set so that any unallocated square in the grid that can take a '5' has a small '5' shown in the top left corner. In this case the remaining two '5's can only go in two squares Hf and Ia all the other squares cannot take a '5' because of the pattern of the '5's already allocated.

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