Author: Robert Hyatt
Date: 06:07:16 05/23/00
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On May 23, 2000 at 01:18:21, Vincent Vega wrote: >On May 22, 2000 at 23:02:36, Robert Hyatt wrote: > >>On May 22, 2000 at 22:24:20, Mark Young wrote: >> >>>You are wrong, there is a lot of "say" that shows as you increase ply depth the >>>next ply you increase gets fewer and fewer rating points. >>> >> >> >>Where? IE I have seen this _said_ several times. But I have never seen it >>_shown_. Two good examples to the contrary are the "crafty goes deep" and >>"dark thought goes deep" published in the JICCA. Both suggest that at least >>until we reach depth 15/16, each additional ply is revealing new and more >>important information about a position... and resulting in steadily improving >>play... >> >>I think the programs are getting stronger every year, even if nothing is changed >>but faster hardware... and it is reasonably linear... so far. > >I've started doing some experiments to determine if there is a rating increase >falloff with longer times and the initial results seem to confirm my guess that >there will indeed be a falloff due to an increasing number of draws. So far >I've done mostly Crafty self-play tests at short time controls and only few test >games with other programs and longer time controls so the results aren't >definite. I'll try to do more testing but I've been busy lately. Program A vs Program A is not a good test. Also blitz games won't show a thing. The question is does every ply boost the rating the same amount? To answer this you have to be able to search to depths of 15-16 plies. No point in comparing depth 5 to depth 6... it is more important to compare depth 15 to depth 16.
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