Branch of applied mathematics devised to analyze certain situations in which there is an interplay between parties that may have similar, opposed, or mixed interests.
Game theory was originally developed by John The Theory of Games and Economic Behavior (1944). In a typical game, or competition with fixed rules, "players" try to outsmart one another by anticipating the others' decisions, or moves. A solution to a game prescribes the optimal strategy or strategies for each player and predicts the average, or expected, outcome. Until a highly contrived counterexample was devised in 1967, it was thought that every contest had at least one solution. See also decision theory ; {{link=prisoner's dilemma">prisoner's dilemma.