The rules of KSudoku are quite simple.
Depending on the size of the game board, the type of puzzle and the difficulty level chosen an individual KSudoku puzzle may take from a few minutes to a few hours to solve.
Each square may hold one and only one symbol.
Each horizontal row (as defined by the game board) can contain each symbol exactly once.
Each vertical column (as defined by the game board) can contain each symbol exactly once.
Each block (as defined by the game board) can contain each symbol exactly once
The set of symbols depends on the size of game you choose.
Knowledge of mathematics or language is not required to solve KSudoku puzzles.
The symbols already on the game board when the puzzle starts cannot be changed.
You can only modify the symbols you have previously entered.
Puzzles generated by KSudoku have one solution only.
Puzzles you enter in might have no solution or more than one solution, but if they are from a published source this probably means you have made a data-entry error.