Author: David Rasmussen
Date: 05:35:17 01/07/01
Go up one level in this thread
On January 06, 2001 at 21:36:45, stuart taylor wrote: >On January 06, 2001 at 20:48:08, Christophe Theron wrote: > >>On January 05, 2001 at 14:41:51, David Rasmussen wrote: >> >>>I was wondering why some of the clever ideas I've been reading about, aren't >>>used in the programs I know of. >>> >>>ETC, Enhanced Transposition Cutoff, seems like a very good idea and have been >>>tested to perform well in practice. Why isn't it used? >>> >>>I can't think of any more ideas right now... >> >> >> >>A number of ideas that sound simple and powerful actually do not work at all in >>computer chess. >> >>On the other hand, I know several strange and unsound ideas that are working >>great in my program... I was lucky enough to try them, but if I had trusted my >>feelings (and my logical sense) I would not have discovered them. >> >> Sure. I wasn't talking about using the idea as it is, as it clearly depends on your program whether it is a good idea or not. I was talking about starting with the idea (which is good), and fiddling with it to see what happens. For instance, I wouldn't be surprised if ETC is worth doing in the first few plies in every program, because the expense of generating all hashkeys to successive moves, is not that great when done on a relatively small amount of nodes, and cutoffs near the root cuts off large subtrees. I will try it out in my own program, but I just wanted to hear about other peoples experiments first. Why don't you publish some of your ideas? They're doing no good now, besides making money for you. >> >> Christophe > >You said you didn't try most of your ideas yet. Why did you choose these? > >And, I'm happy to hear that actual programers have all the best ideas too, and >not only people like what I used to be, but with no actual computer knowledge >(only imagined speculations) or ways of testing things. >S.Taylor I think it's a mix of both worlds. I'm sure Christophe has a sound understanding of the theoretics of a computer chess program. All the best ideas aren't developed entirely by practicioners. They rely on vast amounts of past work, theoretic and practical.
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