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Created page with "'''Home * Search * Score * Exact Score''' An '''Exact Score''' is a score returned from an alpha-beta search, if [[Alpha|alpha]..."
'''[[Main Page|Home]] * [[Search]] * [[Score]] * Exact Score'''
An '''Exact Score''' is a [[Score|score]] returned from an [[Alpha-Beta|alpha-beta]] search, if [[Alpha|alpha]], the max so far, was improved, while the min-player improved his score as well (<span style="background-color: rgb(222, 222, 222)">score < beta</span>). The current [[Node|node]] searched was an expected [[Node Types#PV|PV-Node]], which was confirmed by the search in finding and collecting a [[Principal Variation|principal variation]].
=Always or Never=
* Pure [[Minimax]] always returns exact scores.
* A [[Null Window]] search never returns exact scores.
=See also=
* [[Alpha-Beta]]
* [[Integrated Bounds and Values]]
* [[Lower Bound]]
* [[Score]]
* [[Transposition Table]]
* [[Upper Bound]]
=Forum Posts=
* [https://www.stmintz.com/ccc/index.php?id=309279 Bounds... when is an exact score an EXACT score?] by [[Ross Boyd]], [[CCC]], August 01, 2003
* [http://www.talkchess.com/forum/viewtopic.php?t=42224 A few general questions...] by [[Bill Henry]], [[CCC]], January 29, 2012 » [[Root]], [[Aspiration Windows]]
'''[[Score|Up one level]]'''
An '''Exact Score''' is a [[Score|score]] returned from an [[Alpha-Beta|alpha-beta]] search, if [[Alpha|alpha]], the max so far, was improved, while the min-player improved his score as well (<span style="background-color: rgb(222, 222, 222)">score < beta</span>). The current [[Node|node]] searched was an expected [[Node Types#PV|PV-Node]], which was confirmed by the search in finding and collecting a [[Principal Variation|principal variation]].
=Always or Never=
* Pure [[Minimax]] always returns exact scores.
* A [[Null Window]] search never returns exact scores.
=See also=
* [[Alpha-Beta]]
* [[Integrated Bounds and Values]]
* [[Lower Bound]]
* [[Score]]
* [[Transposition Table]]
* [[Upper Bound]]
=Forum Posts=
* [https://www.stmintz.com/ccc/index.php?id=309279 Bounds... when is an exact score an EXACT score?] by [[Ross Boyd]], [[CCC]], August 01, 2003
* [http://www.talkchess.com/forum/viewtopic.php?t=42224 A few general questions...] by [[Bill Henry]], [[CCC]], January 29, 2012 » [[Root]], [[Aspiration Windows]]
'''[[Score|Up one level]]'''
