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Subject: For Stefan Meyer-Kahlen

Author: Ziad Haddad

Date: 10:48:19 04/22/04


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?
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. 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!! May be Shredder have had this problem in
his last round game of the WCCC 2003 !?



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