Strategy purification

  • Authors:
  • Sam Ganzfried;Tuomas Sandholm;Kevin Waugh

  • Affiliations:
  • Carnegie Mellon University;Carnegie Mellon University;Carnegie Mellon University

  • Venue:
  • The 10th International Conference on Autonomous Agents and Multiagent Systems - Volume 3
  • Year:
  • 2011

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Abstract

There has been significant recent interest in computing good strategies for large games. Most prior work involves computing an approximate equilibrium strategy in a smaller abstract game, then playing this strategy in the full game. In this paper, we present a modification of this approach that works by constructing a deterministic strategy in the full game from the solution to the abstract game; we refer to this procedure as purification. We show that purification, and its generalization which we call thresholding, lead to significantly stronger play than the standard approach in a wide variety of experimental domains. One can view these approaches as ways of achieving robustness against one's own lossy abstraction.