Author: Bob Durrett
Date: 10:46:26 07/12/03
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On July 11, 2003 at 23:27:07, Matthias Gemuh wrote: >On July 11, 2003 at 21:27:58, Bob Durrett wrote: > >> >>Suppose the programmer were to deliberately load the hash table with false data >>and then start the engine analyzing a given position. Could the false >>information in the hash table cause the engine to produce the wrong move? >> >>Corollary: Suppose the engine were given 24 hours [or more] to find the correct >>move, after the programmer had loaded bogus information into the hash table. >>Could it happen that the engine might NEVER find the correct move as a direct >>result of incorrect information having been loaded into the hash table? >> >>I would very much appreciate an answer to this. I am experimenting with >>different ways to use the engines in analysis and would like to know whether or >>not I am doing anything right. It would really help to understand the details >>of how modern engines use the hash tables. [Maybe different ways for different >>engines?] >> >>Thanks in advance, >> >>Bob Durrett > > > >Junk in the hash table will not contain valid hash keys, >except the engine is amateur and has been poorly designed/written/programmed. >So the junk will not be used. It will be overwritten unused. >It will not affect playing strength. > >/Matthias. I guess I was assuming that the programmer, performing this experiment, would not use "junk" but instead use data which would be recognized as being in the right format and satisfying whatever checks the engine might be programmed to look at. The end purpose of my question is to find out whether or not operator procedures can have any impact [adverse or contributory] on engine performance. If there is an optimal procedure, I would assume that it would have something to do with actions which impact the hash table contents. Bob D.
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