Author: leonid
Date: 05:26:51 10/03/99
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On October 03, 1999 at 04:40:59, Ed Schröder wrote: >>Posted by leonid on October 02, 1999 at 08:23:35: >> >>Is really Rebel 10 raw speed (search by brute force)is higher that of >>Hiarcs 7.32? >> >>For the last few months I am trying to find exactly where the raw speed of >>my logic for positional search stays. I tryed few best games. My response >>was that my "branching factor" was not good. It went between bad, very bad and >>just normal. Problem is that you can't say for sure that the game that you >>comparer with do the "brute force search". During the last surprise I >>found that in Hiacrs to reach the "brute force" you must put its "selectivity" >>to zero. Now it is likely that Rebel raw speed is even higher that Hiacrs. >>Is this last finding only mirage or "final truth"? >> >>Thanks for response, >>Leonid. > >Unfortunately there is no "final truth", so you can stop searching :) > >Thinking (for example) 6 plies deep with Program_X can't be compared >with 6 plies deep for Program_Y. Main reason: different type of >extensions chess programs use. > >Best example is Deep Blue. DB's iteration depth is in the same league as >the micro's. It is said DB uses massive extensions which explains it all. > >It is impossible to compare chess programs on ply-depth. > >Ed Schroder I am not sure what you want to say with "extention" but my trying was very simple. The identical positions were tryed on Rebel and Hiacrs using same computer. Number of plys demanded were the same and from boths games it was asked to make search by "brute force". Rebel was incredebly speedy. How raw speed is implemented in final game it is the next question to ask. But potential of the game is on its raw speed anyway. To Rebel was said: 1) Brute force - on. 2) Hash table - put to zero. To Hiacrs was said: 1) Selectivity - put to zero. 2) Hash table - put to lowest value possible, to 1024k. So, it is true that Hiarcs did his search at brute force and he really a looser? Great mystery for me. Thanks to everybody who will make this enigma vanish! Leonid.
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