Author: Chessfun
Date: 19:13:54 10/31/00
Go up one level in this thread
On October 31, 2000 at 20:29:06, Robert Hyatt wrote: >On October 31, 2000 at 18:27:44, Bruce Moreland wrote: > >>On October 31, 2000 at 10:00:42, Robert Hyatt wrote: >> >>>There is a change. What you said used to be true, but now scrappy runs on >>>identical hardware, with the same book, TBs and so forth. The _only_ difference >>>is that it has !computer in its formula, as an experiment to see whether Crafty >>>does better vs humans or vs computers/humans combined. >> >>I think you can safely say that it achieves a higher rating with !computer, >>given the !computer types who seem to be playing it and the time controls they >>like. >> >>Its maximum rating is over 150 points higher than regular Crafty, and when I've >>seen it it always seems to be three or four hundred points higher than regular >>Crafty. >> >>bruce > > >At present, yes. But the last time I ran this experiment, this wasn't >true (6 months ago). Crafty and Scrappy were almost identical. I think >there was a thread here that discussed this. However, in the current case, >Crafty is mainly playing computers, while 6 months ago crafty was playing >a mix of humans and computers. That probably accounts for the differences. > >Some computers that do fairly well against me still have trouble with humans >and can't get their rating up high enough to not drag crafty down significantly. I have also noticed myself that Crafty which with it's large hardware speed advantage don't do that well against computers. This could be in part the blitz time controls or is it possible that Crafty has been tweaked in someparts on the advice of GM's and that while increasing it's performance against humans has weakened it against computers?. Currently Crafty's rating is as low as I have ever seen it. I think from what I've seen Crafty is much stronger in blitz games against humans than any other program on ICC. It seems to lose rating points when playing computers and gaining them playing humans which as you say the other computer accounts have trouble with. Though I think it's probably also true that those other computer accounts play a higher percentage of their games against other computer accounts. Sarah.
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