If you have created a Library book of puzzles, you can post a notice in this forum, telling people where the book (.sudbook file) can be downloaded from.
Anyone can load a Library book into their copy of Sudoku and play the puzzles in the book, on their computer.
If your Sudoku program generated a puzzle which you think is interesting or curious in some way, leave a note in this forum, telling people where the puzzle (.sud file) can be downloaded from.
Anyone can load a SUD file puzzle into their copy of Sudoku and play the puzzle on their computer.
Original works only, please.