Author: Tord Romstad
Date: 16:06:01 06/20/05
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On June 18, 2005 at 06:00:37, Vasik Rajlich wrote: > >Most of the search experts don't like MTD (f). Tord has stopped using it, Fabien >also never liked it. (A discussion from CCC IIRC ..) Hi, I just came home from holiday and saw this discussion. I don't have time for reading the whole thread or making any important contributions myself, but I have a few comments to the paragraph quoted above. First of all, I am by no means a search expert. My main reason for using MTD in Gothmog was not a belief that it was theoretically superior to other alpha-beta variants, but rather that it is by far the cleanest and easiest to implement. My main reason for switching to PVS in Glaurung was not that I was not satisfied with the performance of MTD, but rather that I wanted to try something new in order to learn more about search techniques. For weak engines like mine, the choice between MTD or PVS isn't really that important anyway. With so many other more fundamental weaknesses to fix, there simply isn't any major gain to be found by changing the main search algorithm (except broadening your knowledge and experience, which can be important in the long run). Tord
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