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Up Topic The Rybka Lounge / Computer Chess / How do chessprogrammers define the endgame for their engine?
- By rocket (***) [se] Date 2017-11-29 16:00 Edited 2017-11-29 16:04
Given that there is no consensus among humans when the endgame phase begins, how is an engine supposed to know:eek:

Nice summary of the different opinions in Wikipedia:

An endgame is when there are only a few pieces left. There is no strict criterion for when an endgame begins, and different experts have different opinions (Fine 1952:430). Alexander Alekhine said "We cannot define when the middle game ends and the end-game starts" (Whitaker & Hartleb 1960). With the usual system for chess piece relative value, Speelman considers that endgames are positions in which each player has thirteen or fewer points in material (not counting the king). Alternatively, an endgame is a position in which the king can be used actively, but there are some famous exceptions to that (Speelman 1981:7–8). Minev characterizes endgames as positions having four or fewer pieces other than kings and pawns (Minev 2004:5). Some authors consider endgames to be positions without queens (e.g. Fine, 1952), while others consider a position to be an endgame when each player has less than a queen plus rook in material. Flear considers an endgame to be where each player has at most one piece (other than kings and pawns) and positions with more material where each player has at most two pieces to be "Not Quite an Endgame" (NQE), pronounced "nuckie" (Flear 2007:7–8).
Up Topic The Rybka Lounge / Computer Chess / How do chessprogrammers define the endgame for their engine?

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