Rules And Aims........( Game )

Common win conditions are being the first to amass a certain quota of points or tokens (as in Settlers of Catan), having the greatest number of tokens at the end of the game (as in Monopoly), or some relationship of one's game tokens to those of one's opponent (as in chess's checkmate).

Intermediate goals can provide motivation when long-term goals may be far off.

An aim identifies a sufficient condition for successful action, whereas the rule identifies a necessary condition for permissible action.For example, the aim of chess is to checkmate, but although it is expected that players will try to checkmate each other, it is not a rule of chess that a player must checkmate the other player whenever possible.

Some games include rules about changing rules. In Nomic, invented by philosopher Peter Suber, players' turns include proposing rule changes and voting upon them.