Upper Bound
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There are two semantics inside an Alpha-Beta like search, related to Upper Bounds:
An Upper Bound is returned from an Alpha-Beta like search, if it fails low. All moves were searched, but none improved alpha. The node searched was a confirmed All-Node.
Forum Posts
- Using just Upperbounds and Lowerbounds by Alvaro Jose Povoa Cardoso, CCC, February 01, 2001
- bound type in PVS ? by Mahmoud Uthman, CCC, January 23, 2017 » Bound, Exact Score, Principal Variation Search
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