There is often discussion on the forums with PGNs and game history in chess notation. It is hard to follow it without seeing the board, but we can only play through games here which have been played. People should be able to make their own games to be played through for demonstration purposes. Perhaps replicas of famous games, or theoretical situations. Just set pieces and move for both black and white. It goes down as a normal game history, with no record of a win/loss of course, just for people to view.