Author: Thorsten Czub
Date: 10:46:54 11/12/00
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On November 12, 2000 at 13:33:41, Robert Hyatt wrote: >There is likely a simple explanation. If you expect to search to 10 plies, >you can tune your extensions to solve those tactical issues you want to solve >within 10 plies. But going to 11 or 12 may well cause the extensions to >over-trigger and bog the search down badly. > >This has always been a problem, which is why varying the hardware speeds makes >no real sense once you get away from the speed of the hardware the engine is >actually developed on. Some might not tune this way. Others do. It is >certainly a good idea to maximize performance on the machine you are going to >use... could be the reason, yes. hiarcs was , as far as i remember it, always "tuned" or made especially for 40/120 tournament time control. maybe you are right and the problem is that it was optimized for older machines, and now has problems coming deeper. but - this was always with hiarcs. hiarcs always took much time to come deeper. therefore i told mark to make special search-levels for longer time control. email-chess levels where hiarcs is more selective than in tournament-mode.
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