sudoku.pl that offers a simple alphanumeric board display that supports the 9x9 matrix. It can generate a sudoku puzzle, but manual input by the user is also possible to use a sudoku from a newspaper, the Internet etc. It assists the user in solving the sudoku by providing some functions, up to and including solving the sudoku from the current board-setting. If the option -d is set, all solutions are found and logged, up to a maximum of 10. This option enables the program to test a given sudoku for having one solution only, which is a generally preferred sudoku property. Also included is a sudoku generator that supplies the single solution type sudokus.