Author: Stefan Meyer-Kahlen
Date: 11:27:58 04/22/04
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Hi Ziad, On April 22, 2004 at 13:48:19, Ziad Haddad wrote: >Hi Stefan >It's great to have you in this forum. I think that all the top chess >programmers must give a particular interest to the computer chess forums because >they'll find there what we expect from their products, but also it's agreat >source to discover the eventual bugs of the product because i suppose that with >all the computer chess lovers community we got there the biggest beta testers >ever. > >I've got a special question for you. I posted about an eventual bug of the >Shredder's engines in the managment of the HashTables. In fact, when i test them >in simultaneous games against various engines i have found that as the number of >consecutive games is greater as the results of the shredder engine is becoming >bad (to avoid the influence of the openings choosen by the engine i always test >it from some positions that i picked from the Nunn Testsets or others ). But >after i switch my computer Off, open it again and reinitiate the matches the >results of Shredder are good. > >haven't you discovered such a bug? No, I am pretty sure that there is no such bug. To prove that there is such a bug you would need many games, and if I say many I really mean many. >Have you an idea concerning this problem? May be it's due to my computer. I've >tested mostly on a 2,4 MHz P4 with a Hash for each engine of 64 Mo, Learn Off >for Shredder. Why do you switch learning off? I am working on a nice feature and you are just switching it off? :-) >I've got a total of 128Mo of possible Hash for each engine. The >main time control used is 3mn per engine. This problem tends to be less >important with greater time controls!! Still I am sure that there is no such problem. > May be Shredder have had this problem in >his last round game of the WCCC 2003 !? No, that was something different. Actually the story of the Graz bug is funny somehow, maybe sometimes I will write something about it... Stefan
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