Game Phases
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The textbook division of game phases enumerates three of them:
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
- Evaluation Discontinuity
- Multiple Piece-Square Tables
- Stockfish Evaluation Guide
- Tapered Eval
Forum Posts
2015 ...
- From midgame to endgame: help needed by Stephane Nicolet, FishCooking, September 17, 2015 » Stockfish
- 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
- A different approach: how to avoid endgames with slight advantage - insufficient to win by ig.u...@gmail.com, FishCooking, October 22, 2017
- mg vs eg eval by Joost VandeVondele, FishCooking, October 06, 2019 » Middlegame, Endgame, Stockfish
2020 ...
- [NNUE and game phase by Dann Corbit, CCC, January 18, 2021