Improved Limited Discrepancy Search

  title={Improved Limited Discrepancy Search},
  author={Richard E. Korf},
  booktitle={AAAI/IAAI, Vol. 1},
We present an improvement to Harvey and Ginsberg’s limited discrepancy search algorithm, which eliminates much of the redundancy in the original, by generating each path from the root to the maximum search depth only once. For a complete binary tree of depth d, this reduces the asymptotic complexity from O(y2”) to O(2”). Th e savings is much less in a partial tree search, or in a heavily pruned tree. The overhead of the improved algorithm on a complete b-ary tree is only a factor of b/(b 1… CONTINUE READING
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