Author: Jeff GAZET
Date: 00:37:38 04/23/04
Good morning, i'm trying to add extensions to my engine. I'm using a classical alphabeta function : int alphabeta(int depth, int alpha, int beta) depth is dicreased 1 by 1 : eval=-alphabeta(depth-1,-beta,-alpha); At the beginning at the function alphabeta(), if king is incheck, i do ++depth. This works fine. In the main move loop, if do a ++depth on a promoting move, juste before calling -alphabeta... the engine searches for ever when the first promoting move is found. Then, if i add "if depth<1" or <2, i don't see any improvment. I don't understand how engines like GnuChess can write : depth+=DEPTH when extending. (DEPTH is 12). Could someone give me some explanations, please ? Regards.
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