Author: Gian-Carlo Pascutto
Date: 09:04:04 06/19/01
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On June 19, 2001 at 11:52:03, Bas Hamstra wrote: >On June 19, 2001 at 08:44:19, Gian-Carlo Pascutto wrote: > >>On June 19, 2001 at 08:21:38, Bas Hamstra wrote: >> >>>>For sorts of futility pruning, this is my general observation which is >>>>confirmed by Vincent. >>> >>>No wait, this is a different matter. Vincent just doesn't like FP. And I >>>don't either. For Crafty-like qsearches it works ok. But I don't like such a >>>qsearch. >> >>What evidence do you base this on? > >Base what on? [snip] >But I think you want me to explain why I don't like FP? [snip] My mistake. What evidence do you base the sentence 'for crafty-like qsearches it works ok' on, as a counterargument for the statement 'more eval->bigger FP margin' when I was defending the statement that 'for DB fut. prun. does not have to be an improvement'? If you don't understand what I am asking, nevermind. I'm not even sure I do. > >>My program used a crafty-like qsearch and when I started adding more eval >>I had to up the FP margins too to get more benefit. > >Maybe you should check if you get even more benefit, when switching it off. No. It is still pretty small (1.5p). I just noted when I added more eval I had to upp the margin too, because score swings got bigger. >Razoring sounds fine (I think in an old paper razoring had a diffent meaning >than today?!). Limited Razoring (Heinz) =/= Razoring (Kent et al) >>At four hours per move (needed to get comparative to DB), I think it is >>going to make little difference, especially when SE comes to play. > >How can you tell? I can't. I can only use my experience and common sense, thats why I used the word 'think'. If I could tell, I'd have said: 'It doesn't make any difference at 4 hours per move'. If we want to know, we have to experiment. But I'm not going to run matches at 4 hours per move. -- GCP
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