Author: Dan Honeycutt
Date: 08:34:51 06/16/04
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On June 16, 2004 at 06:09:08, Matthias Gemuh wrote: >On June 15, 2004 at 19:28:36, Andrew Wagner wrote: > >>I've heard it said before that it's not good to compare node counts between >>engines, and that node counts aren't a good indication of strength. So, I've >>been staying away from that a lot. >> >>The other day, I was chatting with my good friend Jaime Benito de Valle Ruiz. We >>see each other a lot on ICC and compare notes on our engines. We decided to play >>a fixed-depth game between our engines, to test eval strength. In the process of >>the game, he noticed that my node count was ridiculously higher than his. For >>example, in one position, where I was getting 277k nodes, he was getting like >>11k. Other engines varied, but no more than about 50k nodes. >> >>So we started doing some tests. For him, he got a huge node reduction by using >>some sophisticated aspiration windows. So, my question is three-fold: >> >>1.) Do most engines get a similarly large reduction in nodes by using aspiration >>windows? >> >>2.) What other techniques reduce node counts at a fixed depth? >> >>3.) To what extent are node counts reliable for determining engine strength? > > > > >To reduce node count, I sometimes divide it by two. > >/Matthias. That's good for getting the nodes down but it doesn't ensure that you out search the other engine. To do that you need to multiply the depth by two. Dan H.
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