Xudoku Help

Description
Xudoku (also known as "Su-doku") is an addictive game of logic.
There is only one rule: Fill in the grid so that every row, column and box contains all digits (or symbols) only once.


Solving Su-dokus
All these Su-doku puzzles are solvable using logic and reason alone.
There is only ONE single solution to any puzzle generated by the program.
If you make an obvious mistake, like putting two of the same number in a line, you will be warned.
Think logically about the puzzles, rather than guessing. This means you should only enter a number once you're sure about it.

Markup
When you select ‘Markup’, the computer will automatically fill in all the possibilities for each square. The little hint numbers will automatically update every time you place a new number.



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