Author: Gordon Rattray
Date: 09:17:40 08/16/01
Go up one level in this thread
On August 16, 2001 at 11:50:53, Uri Blass wrote: >On August 16, 2001 at 07:35:16, Gordon Rattray wrote: > >>On August 16, 2001 at 05:54:50, Terje Vagle wrote: >> >>>On August 16, 2001 at 05:21:51, Bertil Eklund wrote: >>> >>>>On August 16, 2001 at 03:16:59, Terje Vagle wrote: >>>> >>>>>Hi all, >>>>> >>>>>When I run Fritz 6 or Junior 6 in infinite mode over night, the NPS drop from >>>>>approx. 600KNS from when I start it to approx 75KNS when it has been running for >>>>>about 8-10 hours. The clock also starts to blink. >>>>> >>>>>BUT, when I run Fritz 5.32 in the same conditions, it continues the analysis >>>>>with the same KN/s even after several days! >>>>> >>>>>WHY? >>>>> >>>>>Thanks in advance. >>>>> >>>>>Regards >>>>> >>>>>Terje Vagle >>>> >>>>Hi! >>>> >>>>Check the HD activity! It is some kind of overflow of the memory. >>>>Try to lower the hash-tables a bit. >>>> >>>>Bertil >>> >>> >>>Hi, >>> >>>No Bertil, that is not it I think. I have 512 MB ram on my PC and hashsize of >>>128 MB. >> >> >>I have seen the same problems. Like yourself, I am sure that there is no >>endgame tablebases or other disk access coming into effect. My hashtable size >>was 256Mb on a 512Mb RAM machine and it was no where near to being an endgame >>position. I had just put it down to some sort of bug or weakness or the >>program?! > >My guess is that the number of nodes is simply not correct. >It is probably no bug and no weakness because the program is not supposed to >know to count nodes but to play chess and if the program use 32 bit number for >the number of nodes the number is not correct at long time control and there is >no problem(at least there is no problem if the program do not use the number of >nodes to decide which lines to search first). I disagree. If a chess program displays the number of nodes, then it should be correct. Otherwise, what is the point in displaying it at all!! I agree that this isn't as significant a bug as, for example, if the program didn't play chess according to the rules, but it's still a bug. I accept that not all bugs have equal significance. If it's a 32 bit number that is wrapping, this is a problem. The Fritx GUI is designed to show node counts. Fritz is designed to be able to analyse over long periods of time. If this doesn't work, it's a bug. Gordon
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