this object will be used to represent a single square on the sudoku board.
create a new square on the board at location $id
get the id of the element
get or set the value for this square
get the values in the valid array.
add a number to the valid array
remove a number from the valid array
Andrew Wyllie <email@example.com>
Please send any bugs to the author
The Games::YASudoku moudule is free software and can be redistributed and/or modified under the same terms as Perl itself.