Author: Fabio Barrettone
Date: 00:21:19 07/26/01
Dear Forum, Since I'm planning to do a tourney with STC with all the engines I've found so far working well under Chessbase also with permanent brain on I was wondering, since I have only one computer to do it, if it is better to do the games with PB ON or OFF, using only one CPU. I've watched programs behave under the Chessbase GUI in the two ways. I'm pro PB ON because I think that programs are made above all to use it and not to use PB OFF (just watch the very different time handle of the engines). But I've seen also that using PB ON with a single CPU doesn't give sound certainity that the two engines get the same amount of CPU power (50%). Giving much time, however, it seems that this gap slowly but steadily become less and less in the Chessbase GUI. Sometime ago I read a post of prof. Robert Hyatt that said (from his point of view) that to make engine vs. engine matches it was better to use PB ON also on one CPU. I would like to know your point of view in the question. Like I said I've seen from my experiments that PB ON makes the engines work almost completely different, but I don't know for sure if this is really reliable or not, i.e. if the Chessbase GUI gives the same amount of CPU to the two engines or tend to give more processor for a particular reason (maybe how it is programmed) to one engine respect to the other. Then I've seen some strange behaviour (most with J7) using PB ON with a single CPU. Now I'm a bit in trouble, I like more PB ON but I don't know if it is fair, and surely in blitz games it is not, but maybe with STC it is. What do you think? Maybe some experts may know this better than me. Sincerely, Fabio.
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