Abstract
Fuzzy numbers are proposed as a tool to allow for and possibly diminish the uncertainty in searches. After exhibiting the major operations on such (triples of) numbers, the consequences of their use are discussed, specifically in forward-pruning and optimizing searches. Their application has been shown in a locally developed program, CHESSITZ, and a handful of examples shows up their advantages over some more conventional, non-fuzzy directed searches: fuzzy numbers prove good indicators of risks incurred.
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