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or it can be a set of clues to uncover the truth of a mystery, conspiracy, a web of lies or other the pre-written truths designed by the organisers.

The essence of a marble structure is to regard a game-location including the characters present as placeholders for clues.

Like a marble in a closed bag of marbles are the clues hidden from view.

Marbles may be used to adopt whole narratives to larp - e.g. stories derived from mythology, theatre plays and the like. "Light-weight fates" may be used to give the players good ideas for what to do during the larp. There are also examples of larps where the first part of the larp is [[fate]]d, and the fates are used to establish interesting conflicts, while the rest of the larp is controlled by [[theory of marble]]s.

Theory of marbles was probably "invented" in Norway. Some (old) texts on larphacking are gathered at: [http://scratchpad.wikia.com/wiki/Category:LarpHacking Larp Hacking Wiki]