The document discusses game playing in artificial intelligence. It defines games and different types, like perfect and imperfect information games. It also describes typical structures of games in AI, including 2-player zero-sum games with perfect information and no chance. It discusses game trees, minimax search, and properties like optimality. Evaluation functions and pruning techniques like alpha-beta and iterative deepening are covered to improve search efficiency. Applications of game theory in entertainment, economics and military are also mentioned.