Author: Stan Arts
Date: 02:34:14 09/24/04
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On September 24, 2004 at 03:18:07, Russell Reagan wrote: >You could add one byte (or less) to your hash table entries which represents the >"root ply" that this entry came from. If the root ply of an entry doesn't match >the current root ply, you can handle it accordingly (overwrite it, ignore it, >adjust it, or whatever). This is one way of "clearing" the hash table instantly. > >As a bonus, the old data is still there if you want to use it. For example, >using old entries to adjust scores inside the search may cause search >instability, so for that purpose you would treat old entries as "empty". >However, you can still use old entries for something like move ordering. Yes not using the scores after a gamecapture is one way, but not so efficient. (Although it would indeed save a lot of trouble in a simple way.) >Are you sure you have correctly identified the problem? You say it plays "a bit >better" when you turn the bonus off. To me that says the 0.03 may be a slight >contributing factor, but there may be a bigger issue to face, such as not >evaluating positional factors with enough accuracy to begin with. > >If this is true, you won't have to worry about strong opponents exchanging >pieces and playing for a draw. They'll be playing for a win ;-) :) Well, yes Neurosis's evaluation is sort of poor. But the little scores did cause the effects I described of it sometimes giving up some control and mobility in an attempt to keep it's pieces. If it does that 2x in a positional game, that's often enough to lose it. So then removing it instantly seems good for playing strength. (well, all neurosis's evaluationvalues are small, (so I can scale them with it's speculative option, from mostly tactical to speculative.) so 0.03 was too big in the first place.) But I must say I don't worry about strength too much, and rather it's playingstyle, and searching in bugfree and very solid stable way and so. So I like to experiment with things like this too. And I think it's actually nice if strong opponents play for a win against Neurosis. ;) Greetings Stan
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