Chess is not DM'ed and any game that is not DM'ed is played by an agreed set of rules. Any game that is DM'ed allows for things to happen that are not covered by the rules if the DM and players are willing to work that way.I disagree. Rule sets play large roles in determining the kind and type of creativity by which the tools provided by the rule sets can be used. As a silly example, chess allows for no creativity as concerns piece movement.
joe b.
rpg were invented by people and referees getting creative with the rules and play of a wargame.