UC Davis

The notion of perfect recall in extensive games was introduced by Kuhn [in: Contributions to the Theory of Games, Vol. 2, 1953, p. 193], who interpreted it as "equivalent to the assertion that each player is allowed by the rules of the game to remember everything he knew at previous moves and all of his choices at those moves." We provide a syntactic and semantic characterization of perfect recall based on two independent notions of memory: (1) memory of past knowledge and (2) memory of past actions. (C) 2003 Elsevier Inc. All rights reserved.