Author: blass uri
Date: 04:52:15 06/28/99
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On June 28, 1999 at 02:35:31, Ed Schröder wrote: <snipped> >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
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