Author: Stuart Cracraft
Date: 20:29:31 03/07/99
Crafty seems to have a Scale_Up/Scale_Down factor and I'm curious if Bob would talk a little about this. Seems costly to add a memory reference and a division (?). For example, seems like Bob has chosen to ScaleUp/ScaleDown fairly large contributions such as weak back rank bishop pair certain rooks on open files rook on 7th protected passed pawns based on the side's material. Are there alternatives to controlling the "bloating" of the positional part of the evaluation that aren't so computationally expensive? I know there are very few of these compared to all the terms in Crafty so the cost isn't a big deal (probably.) One I considered was going from centipawns to millipawns and then working backward looking at just those things that should be big (king safety) and sizing them accordingly letting them bloat to a certain degree beyond a pawn. --Stuart
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