Author: Bas Hamstra
Date: 14:09:25 10/22/00
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On October 22, 2000 at 16:37:53, Uri Blass wrote: >1)I believe that the difference between Gambittiger and the default version of >tiger is the fact that Gambit has bigger positional scores. > >There is no reason for a big story to explain what happens. >The word evaluation function is enough to explain what happens. > > >2)I do not think that is is a new paradigm. > >Gambittiger only have more cases of big positional scores and have them in cases >of king attack(I like it but the idea of having big positional scores is not >something new in chess programs). > > >Here is an example of big positional score of crafty. >[D]8/7K/8/8/7R/ppk5/8/8 w - - 0 1 > >The score of Crafty17.11 with no tablebases in depth 1 is 5.26 pawns for black. > >Crafty does not see promotion of black at depth 1 and counting material will >tell you an advantage for white. > >It only proves that Crafty has big positional scores in some cases. > >Uri I agree. Now you can do the some for king safety. For instance, you can assign a huge bonus when two or more pieces are very close to the enemy king. I have tried this earlier: score is proportional to the distance of a piece to the enemy king. And proportional to piecevalue of the attacking piece. Now you will sack severely to get several heavy pieces VERY close to the enemy king. Even if you don't know the outcome. With some tuning you will gamble right most of the time. I believe that is what GT is doing. Bas.
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