Author: blass uri
Date: 06:40:02 06/28/99
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On June 28, 1999 at 09:22:21, Robert Hyatt wrote: >On June 28, 1999 at 07:52:15, blass uri wrote: > >> >>On June 28, 1999 at 02:35:31, Ed Schröder wrote: >> >> >>>The main problem of these engine-engine matches on one Pc is that >>>because the lack of the permanent brain the time control rules of the >>>program in question is not in harmony anymore which may result in >>>very bad play. >>> >>>Playing without permanent brain requires *another* set of rules for >>>time control. Programs who play engine-engine matches on one >>>Pc (a) should realize it is playing such a match and then (b) use a >>>totally different (and well tuned) time control. >>> >>>The big question is if these engines are aware of this. If engine_X >>>knows and engine_Y does not know then engine_X has a big >>>advantage (50-100 elo?!) and results are meaningless in the >>>sense that results can completely different if you run them on >>>2 Pc's (which remains the only accurate way BTW). >> >>I am surprised by the 50-100 elo difference. >>I think that the ssdf results show that the difference between pentium200 and >>pentium90 is in this range. >> >>I think that not using the permanent brain may cause problem only in the moves >>that are close to the time control(If I suppose 2 hours/40 moves) and the >>results are similiar to the case that instead of playing all the game on >>pentium200 you play the first moves on slightly better hardware and the last 10 >>moves on pentium 100. >> >>I expect a difference of 20-40 elo and not 50-100 rating in this case. >> >>Uri > > >This just isn't the way it works. And the reason is that no one tests like >this. (programmers). Any more than we test with no hash tables (or way too >small hash tables) or any other 'crippled' mode. > >The way to play is to play the way the programs were tested and developed. >Just because something 'works' doesn't mean that it 'works well'... I agree it is not perfect but the way I test the new version of Junior is in engine-engine games and I tell Amir Ban about the games and what are the problems of Junior. I am sure that he learns from these games. I have not 2 computers with the same speed. I do not think that it is exactly the same as computer-computer games but I do not think that there is a big difference. Uri
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