Solving a Sudoku puzzle in pen, rather with a pencil.
The puzzle is solved the same as normal Sudoku, however mistakes in pen become permanent, just like mistakes when playing windows minesweeper.
In the event of an error, the entire puzzle becomes void.
The puzzle is solved the same as normal Sudoku, however mistakes in pen become permanent, just like mistakes when playing windows minesweeper.
In the event of an error, the entire puzzle becomes void.
by XG-Raven May 8, 2008
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