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Updating your copy The software is designed for ease of update, and even within the generous free trial you can get all the available software upgrades for free. All you need to do is regularly use the Help | Update Check... command to check for updates. Read More |
Possibility Explanation [Page 6 of 13]
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At some stage you'll wonder what numbers can go in particular Sudoku squares. Many other Sudoku puzzle solvers do not give detailed explanations of what can go where and why.
Sudoku Dragon has a clear explanation of why certain numbers are not possible using the rules of Sudoku. In the case illustrated only the numbers 2 and 8 are possible for this square as all the other possibilities are excluded due to a conflict with a number in a row, column or region.
The program will also use the more complex twin exclusion and shared subgroup exclusion rules to determine possibilities. The exclusion rules were used to knock out the possibility of 7 occurring in this square.
The screen remains open and updates itself when you click on other squares so it is always conveniently to hand.
You can download SudokuDragon for a free 22 day trial and investigate the possibility explanations for yourself. Go to our download page.
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