Author: Dagh Nielsen
Date: 09:52:59 10/11/05
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Very interesting, Sandro. I don't have Schredder, but it has inspired me to try and fiddle with the parameters of Fruit 2.2 :-) As it happens, some of the weaknesses I feel Fruit 2.2 default have are too little penalty on bad pawn structures, not enough respect for passed pawns, and not enough respect for king safety either. Also, sometimes it overestimates the chances of bishop/knight + pawn vs. rook, but I find it difficult to adress this issue without making Fruit on the same time overestimate Rook + pawn vs. two minor pieces. I am trying now to make pawns worth less to solve this. And then I make pawn structure, passed pawns and king safety more important exactly as in your Gustav setting. I am curious to find out how much improvement is possible. If, as I suspect, Fruit's evaluation functions are generally just less sophisticated than Schredder's, it MAY not help much to put more focus on pawn structure, for instance. I play on Playchess.com with my Fruit 2.2 engine, using my own book lines, so that also has to be taking into account, results may not be universal. I would be interested to find out how much book choices and engine settings depend on each other, I mean, if it is possible to make a book and one engine setting that is a killer, but the same engine setting would fail with other books. In general, I find all this an interesting field of "research", it requires creativity, good judgement and hard work, and results can be measured with the cold ELO numbers :-)
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