Author: Fabien Letouzey
Date: 04:47:50 06/14/04
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Hi Uri, > I think to look at fruit's source code to learn about it's evaluation. > Fruit nunn based rating increased from 2496 to 2642 based on the > following link http://www.husvankempen.de/nunn/ratings/ratingsnunn2.htm > I understand that it is only thanks to better evaluation when it even > has no king safety evaluation. You can get an idea of the improvement due to only evaluation changes (plus activation of the single-reply extension) by comparing Fruit 1.0 and the private version Fruit X 05/05 (or 05/09) which is still playing in Heinz's Nunn Top 2 tournament. I later (Fruit X 05/21) added "time management", an often-overlooked feature that seems to help a lot in fast games. There were also minor speedups not to mention the use of a a special (beta?) version of the Microsoft compiler thanks to Slater Wold. Overall, too many differences to conclude about evaluation I am afraid. From my point of view however, most of the time was spent on it. This is what I mean by "mostly evaluation changes" (time management was a one-day work plus a second one to fix it for pondering). > Did you look at Fruit1.5's source code to learn about it's evaluation. > I still did not look much at it but I guess that the fastest way for > improvement should be to try to learn from it. My main point is that Fruit 1.0 had almost no evaluation to start with. It should come to little surprise that there was a lot of room for improvement there. In other words I had a problem (Fruit 1.0 played extremely passively) and I "fixed" it (still not good, but more active style). I suggest you don't lose (too much) time reading Fruit's evaluation code. Feel free to ask questions though. Unfortunately I don't know what is the fastest way to progress for you. You mentionned before that Movei was not using the transposition table to full power, it sounds like something promising to fix?! Fabien.
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