Game+Phases

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The textbook division of **game phases** enumerates three of them:
 * Opening
 * Middlegame
 * Endgame

In the opening, the focus is on development, in the middlegame - on attack and defense, in the endgame - on pawn promotion and realization of the material advantage.

Whereas this definition is good enough for humans, coding it in a straightforward manner would introduce evaluation discontinuity in many places. For that reason many programs define several game phases, based on the amount of material on the board.

=See also=
 * Development
 * Tapered Eval
 * Multiple Piece-Square Tables
 * Stockfish Evaluation Guide

=Forum Posts=
 * [|Anomaly of Stockfish eval depending on phases of the game] by Kai Laskos, CCC, May 05, 2016
 * [|is phase a good indicator of game progress?] by Alexandru Mosoi, June 23, 2016 » Tapered Eval
 * [|Early / middle / end game transitions?] by notachessplayer, OpenChess Forum, February 19, 2017

=External Links= > feat. [|Gary Burton], Jan Garbarek, [|Rainer Brüninghaus], Marilyn Mazur, Wolfgang Dauner, [|Reto Weber], [|Nino G], > [|Roland Kluttig] and the [|Stuttgart Radio Symphony Orchestra] > media type="custom" key="24881852"
 * [|Outline of chess from Wikipedia]
 * [|Stockfish Evaluation Guide] » Stockfish Evaluation Guide
 * [|Phases of a Chess Game] by Mark Weeks
 * Eberhard Weber - Stages of a long journey, © 2007 [|ECM Records], [|YouTube] Video

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