Author: Robert Hyatt
Date: 11:50:49 01/19/06
Go up one level in this thread
On January 19, 2006 at 12:42:15, David H. McClain wrote: >>I have not personally studied/watched any Rybka games (yet). I will certainly >>do so over the next few months, getting ready for the WCCC. If my program loses >>the same way 2-3 times, I'll certainly recognize "the feature" that is causing >>the problem and take some action. If it is not evaluation-based (it is some >>search trick) then it becomes harder to fix, but it is not that hard to decide >>whether your program screwed up by just not understanding and evaluating some >>idea correctly, or whether it just didn't see deeply enough compared to your >>opponent, which means work on the search is needed. > >Robert, > >I think we all agree that Rybka is simply outstanding. As a layman and non >programmer I have gleefully become a victim of Rybka many times, almost to the >point of disbelief on more than one occasion (Shredder 7.04, I know it's old). > >After obtaining clear advantages in openings (my own book) with both black and >white, the area of the "end of the middle game to the end game" has consistently >been my downfall against Rybka and probably the same for other opponents. > >Obviously I don't know what the author has done with knowledge, or lack of, for >his program but whatever he has done is working well. I won't begin to ask you >because I have a fair idea it's much too complicated to state in simple terms >but your example of adding to Crafty's abilities and the need for continual >adjustments is very clear and interesting. DHM One thing is for certain. If it is an evaluation issue, it won't remain unknown for long. Search tricks such as forward pruning are far harder to uncover because there are so many ways they can be handled. But if the main point here is a "new piece of knowledge" then that will be noticed by someone before long. And the same thing will happen as happened to me with the distant passed pawn code. It will be critical to have it, because if you don't you will lose to everyone that does, but having it doesn't give you any advantage over anyone else (except those without it), it just levels the playing field back to normal. Time reveals all, although sometimes slowly.
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