Window - peregrineshahin/ChessProgrammingWiki GitHub Wiki
title: Window
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[ Arched Window of wall painting showing Dalí [1] A Window in the context of Alpha-Beta search (Alpha-Beta window) is the open interval between the lower bound Alpha and the upper bound Beta.
**(α,β) = ]α,β[ = { x ∈ ℤ | α < x < β}**
Only values inside this interval, that is excluding Alpha and Beta, are exact scores. Thus, with integers at least a window of (x-1, x+1) is necessary to reveal one exact score x. A Null Window as used in the Scout part of PVS aka NegaScout, and MTD(f), with integers (α, α+1) or (β-1, β), can therefor only provide a bound, either failing-high with a lower bound or failing-low with an upper bound.
See also
Forum Posts
- Alpha-Beta window in transposition tables? by Marty Bochane, rgcc, October 25, 1996 » Transposition Table [3]
- Negative alpha/beta windows: Are they useful? by Thomas Dybdahl Ahle, CCC, March 06, 2015
External Links
- Interval (mathematics) from Wikipedia
- Window (disambiguation) from Wikipedia
- Window from Wikipedia
- Launch window from Wikipedia
- Window (computing) from Wikipedia » GUI
- Register window from Wikipedia
- Window function from Wikipedia
- Window (short story) from Wikipedia
References
- ↑ Arched Window of a wall painting showing Salvador Dalí, Lima, Peru, 2005 by Tabea Huth, Wikimedia Commons
- ↑ Re: New(?) search idea by Robert Hyatt, CCC, January 22, 1998
- ↑ Re. Fail low after fail high by Marcel van Kervinck, CCC, April 05, 2015 » Fail-Low , Fail-High
