Author: Christophe Theron
Date: 08:15:35 01/07/01
Go up one level in this thread
On January 07, 2001 at 08:35:17, David Rasmussen wrote:
>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.
Hey, making money with them is already a good thing, don't you think so? And my
customers benefit from my ideas (I mean the ones that work)...
Christophe
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