Author: Scott Gasch
Date: 15:13:45 01/10/02
Go up one level in this thread
On January 10, 2002 at 16:23:44, David Rasmussen wrote: >What techniques do people use for assessing good, bad and active bishops? As I >do it now, a good bishop is one with no central pawns on the same color, a bad >bishop is one with at least one pawn on the same color, and an active bishop is >one that isn't looking into a pawn when looking in the direction of the center. >Right now, I don't consider whether the pawns in question are blocked or not, >which is also important. Bishops terms in my engine: mobility: number of squares it can safely move to. trapped: no mobility and under threat. development: get it off the back rank in opening enemy king tropism: the closer the better outposted: no enemy pawns can advance and attack the bishop fianchetto: bonus for defending king. more bonus if the enemy has lost the bishop of the same color. pointed near the enemy king: good to point at or near enemy king pos -- this term is scaled back the more pieces there are between us and the enemy king. good / bad: based on the number and location of pawns on its color. This also helps the engine prefer knights in totally blocked positions. active bad: must be in an outpost (no enemy pawns can attack). must be supported by 1 pawn (if the enemy has no knight / same color bishop) or 2 pawns (if the enemy has a knight or same color bishop). Must point near the enemy king and control a large number of squares in the enemy camp. bonus for protecting a passed pawn. bonus for protecting the queening square of a passed pawn. That's about it. Scott > >In general, I think evaluation terms are not discussed enough in the CCC. Search >techniques, book techniques, move generation etc. is discussed, but what makes, >say, Gambit Tiger such a strong engine, is the unique evaluation terms, I think. >I know Christophe wont say anything about his evaluation terms, but everybody >else should feel free to talk :) > >/David
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.