SuperDuperGames

From Looney Pyramid Games Wiki

SuperDuperGames [1] was an online play-by-web (like play-by-mail or play-by-email, but on the web) system that implemented many abstract strategy games, including several Icehouse games, as well as lots of other fascinating games. You can find a list of games available in the Games on SDG category.

SDG was replaced by Abstract Play in 2023.