Author: Pham Minh Tri
Date: 17:51:17 11/05/00
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On November 05, 2000 at 20:24:43, Robert Hyatt wrote: >On November 05, 2000 at 17:53:18, Pham Minh Tri wrote: > >>Hi, >>I know that "attacked opponents squares" value is one of the important factor >>for evaluation function. However, some of free chess engines like Crafty, GNU >>chess seem not to use it. So I was wondering why. >>Thanks in advance for any explanation. >>Pham > > >Crafty does use this, where appropriate. IE king safety. It also uses this >in Swap() to evaluate captures on a given square... > >If you mean the classic definition of "space" then I don't evaluate that in >the usual sense, no... Yes, I mean the definition as the number of "squres are attacked on the opponent's half of the board" (Advances in Computer Chess 5). The result shows that it is a very important feature. I was wondering if: 1) There are some new researches show that it is not important or it may be replaced by other factors. 2) It is expensive to implement. 3) Some other reasons? Thanks,
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