Efficient belief-state AND-OR search, with application to Kriegspiel

  • Authors:
  • Stuart Russell;Jason Wolfe

  • Affiliations:
  • Computer Science Division, University of California, Berkeley, CA;Computer Science Division, University of California, Berkeley, CA

  • Venue:
  • IJCAI'05 Proceedings of the 19th international joint conference on Artificial intelligence
  • Year:
  • 2005

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Abstract

The paper reports on new algorithms for solving partially observable games. Whereas existing algorithms apply AND-OR search to a tree of blackbox belief states, our "incremental" versions treat uncertainty as a new search dimension, examining the physical states within a belief state to construct solution trees incrementally. On a newly created database of checkmate problems for Kriegspiel (a partially observable form of chess), incrementalization yields speedups of two or more orders of magnitude on hard instances.