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arXiv · 1411.6593

Rational Deployment of Multiple Heuristics in IDA*

David Tolpin·Oded Betzalel·Ariel Felner·Solomon Eyal Shimony
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Abstract

Recent advances in metareasoning for search has shown its usefulness in improving numerous search algorithms. This paper applies rational metareasoning to IDA* when several admissible heuristics are available. The obvious basic approach of taking the maximum of the heuristics is improved upon by lazy evaluation of the heuristics, resulting in a variant known as Lazy IDA*. We introduce a rational version of lazy IDA* that decides whether to compute the more expensive heuristics or to bypass it, based on a myopic expected regret estimate. Empirical evaluation in several domains supports the theoretical results, and shows that rational lazy IDA* is a state-of-the-art heuristic combination method.

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David Tolpin, Oded Betzalel, Ariel Felner, Solomon Eyal Shimony. 2014-11-24. Rational Deployment of Multiple Heuristics in IDA*. https://arxiv.org/abs/1411.6593

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