# Exact Score

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An **Exact Score** is a score returned from an alpha-beta search, if alpha, the max so far, was improved, while the min-player improved his score as well (score < beta). The current node searched was an expected PV-Node, which was confirmed by the search in finding and collecting a principal variation.

# Always or Never

- Pure Minimax always returns exact scores.
- A Null Window search never returns exact scores.

# See also

# Forum Posts

- Bounds... when is an exact score an EXACT score? by Ross Boyd, CCC, August 01, 2003
- A few general questions... by Bill Henry, CCC, January 29, 2012 » Root, Aspiration Windows
- Exact node values by CDaley11, OpenChess Forum, January 16, 2013