Author: Uri Blass
Date: 04:01:19 08/15/03
Go up one level in this thread
On August 15, 2003 at 06:40:37, Sune Fischer wrote: >On August 15, 2003 at 05:52:47, Uri Blass wrote: > >>On August 15, 2003 at 05:17:09, Sune Fischer wrote: >> >>>On August 15, 2003 at 03:02:22, Johan de Koning wrote: >>> >>>>On August 14, 2003 at 03:33:14, Georg v. Zimmermann wrote: >>>> >>>>>nt >>>> >>>>Thanks for appreciating my choice of words. :-) >>>>There is however more to it than just fun, I wanted to avoid the B-word. >>>> >>>>Bug: a piece of code that does not do what the programer intended. >>>>UF : a piece of code that does exactly what the programmer intended. >>>> >>>>... Johan >>> >>>I understand you point, but I think the price is too high. >> >>I do not know if the price is too high. > >The main thing that doesn't appeal to me is the thought of throwing away useful >information. > >I guess what it comes down to is whether you want to sacrifice this to get >determanistic. > >>> >>>Clearing TTs makes the engine, IMO, significantly weaker at short time controls. >>>It is simply too expensive to throw away the little information the engine has >>>collected, and the fraction of a second the clearing itself takes is no small >>>handicap (guess there are tricks to speed this up? :). >> >>Yes >>You can use small tablebases for short time control. > >Clearing is still an overhead, even if it is less than an overhead. > >>Movei simply does not clear hash tables at very fast time control and starts to >>clear them only if it has enough time relative to hash tables. > >Hmm, I think you should be consistent and either decide to clear or not. >If you do clear them you get some simplicity in the hash design. > >-S. No not clearing them in the way that I do it is simple and the only problem is that in this case after some moves at slow time control all the hash is going to be unavailable because it is going to be used by old entries that are not going to be replaced because they have bigger depth. At blitz it is not important because I am not going to be close to a situation of full hash tables so I let myself not to clear them. Uri
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