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Possibility Toolbar [Page 9 of 15])

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

Sudoku Dragon has a Possibilities toolbar controlling which square possibilities are shown. This is used in conjunction with the program's other many View | Options. The Possibility toolbar is conveniently shown above the grid. You select a possibility number in the bar by clicking on it or pressing the ALT key and the number key. Showing all automatic possibilities is available by clicking on the first star (Star icon ) option on the bar (or the F4 function key).

The toolbar lets you select one particular number to be highlighted with all possible occurrences of that number (or letter) shown in the Sudoku grid.

The bar also indicates the number of squares remaining for each number. The colored box behind the number 6 indicates there is only one remaining 6 that needs to be allocated in the grid. The smaller cream boxes behind the 1; 2 and 3 indicate that each of these has only two squares left somewhere in the grid.

In this screen shot 3 been selected in the possibility bar. So all currently allocated 3's are highlighted in the Sudoku and the automatic possibility settings are set so that any unallocated square in the grid that can take a 3 has a small 3 shown in the top left corner. In this case the remaining two 3's can only go in two squares Ac and Ef. All the other squares cannot take a 3 because of the pattern of the 3's already set.

Sudoku Possibility Bar

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