A.V.A.T.A.R. MUD is a free, online, massively multiplayer, fantasy, text-based role-playing game (or MUD), set in a real-time virtual environment.
 It combines elements of role-playing games, hack and slash style computer games, adventure games and social gaming.
An online text-based role playing game is a role-playing game played online using a solely text-based interface.
 Online text-based role playing games date to 1978, with the creation of "MUD1", which began the MUD heritage that culminates in today's MMORPGs.
 Some online-text based role playing games are video games, but some are organized and played entirely by humans through text-based communication.
 Over the years, games have used TELNET, internet forums, IRC, email and social networking websites as their media.
JediMUD is a MUD, an online text-based role-playing game, one of the longest-running of its kind.
 It has been open to the public since August 28, 1992 and is based on the CircleMUD derivative of the DikuMUD code-base.
Red Dwarf: Infinity Welcomes Careful Drivers is a best-selling science fiction comedy novel by Grant Naylor, the collective name for Rob Grant and Doug Naylor, co-creators and writers of the "Red Dwarf" television series, on which the novel is based.
 First published in 1989, the novel presents the plotline of the TV series as a cohesive linear narrative, providing expanded backstory of the Red Dwarf world and more fully developing each of the characters, particularly Lister and Rimmer.
 The book incorporates elements and scenes from the first and second-season episodes "The End", "Future Echoes", "Kryten", "Me²" and "Better Than Life".
 In 1990 the book was followed by a sequel, "Better Than Life".
DikuMUD is a multiplayer text-based role-playing game, which is a type of MUD.
 It was written in 1990 and 1991 by Sebastian Hammer, Tom Madsen, Katja Nyboe, Michael Seifert, and Hans Henrik Stærfeldt at DIKU ("Datalogisk Institut Københavns Universitet")—the department of computer science at the University of Copenhagen in Copenhagen, Denmark.
AmberMUSH, sometimes abbreviated as Amber or AM, was a MUSH — a kind of online text-based role-playing game — based on "The Chronicles of Amber" by Roger Zelazny and, to some extent, the "Amber Diceless Roleplaying Game".
 Founded in 1992 by Jennifer "Jasra" Smith and several associates, it operated until 2009, remaining online for 17 years.
A play-by-post role-playing game (or sim) is an online text-based role-playing game in which players interact with each other and a predefined environment via text.
 It is a subset of the online role-playing community which caters to both gamers and creative writers.
 Play-by-post games may be based on other role-playing games, non-game fiction including books, television and movies, or original settings.
 This activity is closely related to both interactive fiction and collaborative writing.
 Compared to other roleplaying game formats, this type tends to have the loosest rulesets.
Candy Box!
 is a 2013 independent incremental browser video game.
 The game was developed by a then-19-year-old French student using the pseudonym "aniwey" and released in April 2013.
 "Candy Box!"
 is an online text-based role-playing game and features ASCII art in lieu of traditional artwork.
Blue Dwarf is an unofficial Play-by-post role-playing game based in the fictional universe of the TV series Red Dwarf.
 It was originally set up in April 2000 by David Ball.
Ereal is the fictional sun god in the online text-based role-playing game "The Eternal City".
 Ereal is worshiped throughout the fictitious setting of Midlight, where the game takes place.

Question: When was the text-based role-playing game based on Red Dwarf set up? 
Answer: April 2000