Author: Amir Ban
Date: 07:54:36 08/23/98
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On August 22, 1998 at 17:50:56, Thorsten Czub wrote: >The game looks like a classical example game for the fritz5.03 >draw-bug problem. Fritz loses it, and has strange draw bugs and idiotic >main-lines. I will post the pgn-export of junior and fritz later, that you can >see it yourself. Also you see that wherever these draw-evaluations appear, fritz >is not coming much deep. >This seems to be a system-immanant problem... >Why is this ? I mean, thats exactly what I always say: at my home fritz loses in >strange draw-score games, where it behaves like i have seen it in paris. > >I wonder that other people do not have those games... > [snip] > >I am happy that this games happens. Because I can show you in example >what i mean when i talk about this draw-score-bug phnemomena in fritz... >i hope you can all reproduce it on your machines and than we can analyse WHY... >this happens... Looking at the game, I think what you see is only a result of incorrect evaluation. When a program misevaluates a position to think it has an advantage, when in fact the opponent is in control, you often see draw-by-repetition scores. This is because the opponent is in control of the game and often can force a repetition. The opponent doesn't want to force a draw, because it doesn't want a draw, but the program doesn't understand that, based on its wrong evaluation. This is behavior you can expect from all programs who overevaluate their position. Perhaps you associate this with Fritz because you saw many games where this happens to it. Programs usually play terrible when their evaluation is wrong, especially when it's too optimistic. The reason for this is easy to understand. With Fritz my own experience shows that it often manages to play very effectively even when its evaluation is WAY OFF. How it manages to do that is a mystery. Amir
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