Possibility Toolbar [Page 8 of 13]

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Although showing you all the Sudoku possibilities at once can be useful when looking for squares that can be easily solved, 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 other View | Options provided by the program. 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 * option on the bar (or shortcut key accessed from 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 remaining '1' that needs to be allocated. The smaller cream boxes behind the 4 and 5 indicate that each of these has two squares that need to be filled with these numbers 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 5s can only go in two squares Hf and Ia all the other squares can not take a '5' because of the pattern of the 5s already allocated.

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