Author: Robert Hyatt
Date: 06:31:00 04/21/01
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On April 20, 2001 at 15:49:33, Normand M. Blais wrote: >Hi, > >I'm using the following: > >#define ENDING \ >((pawn_mat[side]+pawn_mat[xside] <= 1200) && \ >(piece_num[side]+piece_num[xside] <= 5)) > > >Assuming a value of 1000 for a pawn and that the kings or the pawns are not >counted as a pieces for "piece_num", is the expression above correct? > >Thank you for your help. > >NMB You _really_ don't want to do this in an evaluation. It will give you a serious "boundary effect" where the eval has significant changes around some boundary in the game. In this case, around the point where you decide whether it is still a middlegame or an endgame. You want a _smooth_ transition from MG to EG, not an abrupt change. The program will search around that boundary and produce some very bizarre results... I simply phase MG eval terms out as material comes off, and phase EG eval terms in at the same time. But it is gradual rather than an abrupt change around some magic material boundary...
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