Author: Ralph Patriquin
Date: 15:32:01 03/16/03
Go up one level in this thread
On March 15, 2003 at 23:06:00, Robert Hyatt wrote: >>>On March 14, 2003 at 16:58:15, Uri Blass wrote: >>> >>>>No >>>> >>>>I know that Crafty has anti symmetric evaluation and it means that it is >>>>relatively bad in these positions because it may try to open the position also >>>>when it is wrong. >>>> >>>>I prefer to use an objective program to analyze games and not a program that >>>>tries to avoid closed positions. >>>> >>>>Uri >>> >>>Fine. Which program gives the right answer in such positions then? None I >>>know of. >> >> >>Which human gives the right answer in such positions? Nobody's perfect. > >The point was, however, that if asymmetry for such problems is _bad_ then >which program without asymmetry does it well? I'm not aware of any that >don't have problems with blocked positions. It's the way the "draw masters" >do their evil on ICC. :) > > > >> >>As an aside, it is worth pointing out that DB2 did not do too badly in that >>closed Ruy game against Kasparov, where Kaspy resigned in a drawn position. > >Correct, but who knows how they did it? The idea for "asymmetry" is well- >known. > Bob, could you explain what asymmetric evaluation is vs symmetric evaluation, and pro and con for both? Why is it used? Does it impact the end user in what he sees for a numeric score from the computer? Also, I seem to remember some config file setting for Crafty having to do with asymmetric eval, is this the same thing you're talking about here? Thanks, Ralph
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