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The Sudoku Instructions Program can give you hints, tips and tricks during solving of any sudoku puzzle. Thereby it can help improve your sudoku skills.
Consider this sudoku puzzle:
If you cannot find a square in which there can be just one single digit -
You just click menu item ‘Hint’. Then you will have two choices: ‘Hint 1’ and ‘Hint 2’.
If you click ‘Hint 1’ you will get this message:
This may sometimes be enough information to find the single candidate in column c.
However, if you need more help just click ‘Hint 2’. Then you will get this message:
Now that you know in which square the single candidate is located, you may figure out which digit should be in that square.
If you cannot find a single candidate, you may get the necessary help by asking the program using menu item ‘Solve’ and ‘Find Single Candidate’ as shown here:
If you do that, you will get this message:
Here you get the information you need. Now you will also be able to see why digit 2 must be in square C4.
(In column C digit 2 cannot be inside box J or box P, where there already is a 2. In row 6 there is also a 2. Therefore in column C digit 2 can only be in square C4.)
So you place 2 in that square:
If you proceed in the same way, you will arrive at this final solution of the sudoku puzzle:
Copyright: The Sudoku Instructions Programming Unit -