A Sudoku grid is made up of 81 squares in a 9 by 9 matrix. This form
has text input boxes for each of those grid squares.
To use the blank sudoku grid form, simply fill in the positions you know
with numbers and press the "Submit" button. You can check the "Show Scratchpad"
checkbox if you want the resulting sudoku puzzle to show scratchpad numbers.
After you submit your sudoku puzzle numbers, you can click on the "Edit" button
to continue editing your sudoku puzzle.
These instructions will be hidden when you press the submit button.