Inconsistent heuristics in theory and practice

  title={Inconsistent heuristics in theory and practice},
  author={Ariel Felner and Uzi Zahavi and Robert C. Holte and Jonathan Schaeffer and Nathan R. Sturtevant and Zhifu Zhang},
  journal={Artif. Intell.},
In the field of heuristic search it is usually assumed that admissible heuristics are consistent, implying that consistency is a desirable attribute. The term “inconsistent heuristic” has, at times, been portrayed negatively, as something to be avoided. Part of this is historical: early research discovered that inconsistency can lead to poor performance for A* (nodes might be re-expanded many times). However, the issue has never been fully investigated, and was not re-considered after the… CONTINUE READING
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A* search with inconsistent heuristics

  • Z. Zhang, N. Sturtevant, J. Schaeffer, R. C. Holte, A. Felner
  • International Joint Conference on Artificial…
  • 2009
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