Game (source code)
= Game
A mathematical <game> specifies participants, available choices, information and consequences of combined choices. A <normal-form game> records complete strategies and <payoffs>; an <extensive-form game> records the sequence of decisions and what each player knows at them.
For example, <matching pennies> gives each player two actions and opposing payoffs depending on whether their choices agree. Its <equilibrium> requires <mixed strategies>. A puzzle with one decision maker is often called a game informally, but strategic interaction and <game theory> enter when outcomes depend on several decision makers' choices. The rules determine the mathematical object; a physical board alone does not.
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