Lower Bound

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There are two semantics inside an Alpha-Beta like search, related to Lower Bounds:
 * Alpha is an Lower Bound of a score for this node.
 * A Lower Bound is returned from an Alpha-Beta like search, if it fails high. The node searched was a confirmed Cut-Node.

=See also=
 * Alpha-Beta
 * Bound
 * Exact Score
 * Integrated Bounds and Values
 * Score
 * Transposition Table
 * Upper Bound

=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

=External Links=
 * Upper and lower bounds from Wikipedia
 * Branch-and-bound from Wikipedia

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