Author: Tord Romstad
Date: 10:27:27 06/13/04
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On June 13, 2004 at 12:25:44, Sune Fischer wrote: >Oh you're no fun at all, show us some of that "I am the greatest" attitude which >is ever so popular in these parts. ;) > >Seriously, I'd have to go with the opposite statement, that Gothmog really *is* >stronger. >Just have a look at Leo's little promotion tournament, not that many games of >course but it does begin to add up. Just a few games, and Frenzee didn't even play there. :-) It is true that a recent version of Gothmog finished well ahead of a prehistoric version of Frenzee in division 2, but that can hardly be counted as an interesting data point. >>>>Most of the work has been on the endgame, >> >>Same thing here. >> >>>>but that's no good if the games are always decided before that :) >> >>Of course. It seems to me that a very high percentage of comp-comp games >>are decided in the endgame, though. > >I think so too, that's one of the reasons I saw it as a priority. > >Another reason is that it's simpler in many cases to write endgame eval. There >are quite a lot of well known principles which can be written and tested for in >a pretty straight forward manner. I wish I could say the same, but unfortunately I find the endgame very difficult. There are lots of special cases, and adjusting the evaluation weights to make it all consistent is really tricky. The search in the endgame is an even tougher nut to crack. I haven't found any really effective tricks to reduce the size of the tree. My endgame search is almost completely brute-force. >It seems to matter the most against engines of equal strength or those only >slightly stronger. Probably because many of those games are actually decided in >the endgame. If the opponent is a lot stronger then it doesn't help measurably, >it is most often too late to improve the game at that stage. This could very possibly be true. I haven't tested much against much stronger engines recently. >>Of course, the FRC version will only work in UCI mode, because there isn't yet >>any FRC support in the xboard protocol. > >I'd be surprised if you didn't mean the opposite in that last sentence. :) No, I didn't. Gothmog is only able to play FRC when running in UCI mode. I thought I remembered from the xboard engine interface documentation that FRC wasn't supported yet, although there were some indications that FRC would be added some time in the future. I'll check the documentation again, and perhaps add FRC support for Gothmog in xboard/Winboard mode in my next version. Thanks for the tip. Tord
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