Author: Robert Hyatt
Date: 17:55:43 04/17/00
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On April 17, 2000 at 13:30:47, Ed Schröder wrote: > >Thanks for your explanations, I guess your majority code is better than >mine. To me evaluating majorities makes no sense in the middle-game, >some sense in the early end-game and is often decisive in pawn endings >and that's why Rebel (for instance) allowed the queen exchange as other >aspects of the evaluation are dominant I did it the way I chose, because I tried such 'discontinuous' evaluation terms over the years and they _always_ caused problems. IE if you wait until some mystical point "x" to turn off king safety and turn on endgame code, you make gross errors around that boundary. I was fearful of reaching a lost pawn ending while having so many pieces on the board that it wasn't important. But then the opponent might find ways to force pieces off, and there I am, lost, when I step over the edge and turn on the endgame analysis. > But it surely makes sense to >reconsider the whole majority topic from scratch especially in pawn >endings. Not that I am looking forward to it as it is complicated stuff >with high chances of overseeing the numerous exceptional cases. But Rebel >surely can be improved here. > >Ed > >PS, it seems to me that Harald is right about 31.Nb6! / Nd7 and Nb8! >I will ask Mr. Smyslov for his opinion. Crafty was suggesting different moves at several points. In many cases, the differences were transpositions. In a couple, the score dropped way down after his move was played... and by way down I mean from say +.6 to +.3, as at the move 36. g3... But back to the discussion, majorities are interesting (as are actual candidate and real passers. And I think we have to do well there or else we expose such a big weakness we start off in trouble without knowing it. I know I see way too many things like that going wrong in what I do... but I am trying to fix them as I recognize them.
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