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Extensive form games are represented by a decision tree that denotes players, actions, and outcomes at different points in time.

Each node is assigned to a player. Information sets group nodes together when a player cannot distinguish between them due to imperfect information.

The game is played in a sequence of moves, reflecting the order in which players make decisions.

A strategy in extensive form games is a complete plan of action that specifies what a player will do at each information set.

The leaves of the tree represent the culmination of actions and carry the payoffs for each player.

Backward induction is a method used to solve extensive form games where you start from the end of the game and proceed backwards to determine optimal actions.

A subgame consists of every decision node following a particular node and must include all the descendant nodes of this node.

In games of perfect information, every player knows the moves previously made by all players.