Author: Robert Hyatt
Date: 21:31:04 10/15/00
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On October 15, 2000 at 04:09:20, Bruce Moreland wrote: >On October 15, 2000 at 03:39:13, Andreas St. wrote: > >>Hi, >> >>and now after these analysis white wins? You are very optimistic. I dont see any >>win after these variants. > >Yeah. I haven't played them out, but I find it hard to believe that a program >is showing anything by having its eval increase from like +6 at the root to +6.3 >at some significant depth. I don't probe the TB's at extreme depths... but the PV Crafty has been showing when I analyzed this is a KR vs K position. It gives up th knight and the pawn for the opponent's rook. It just doesn't see the mate at the end, and is giving a score of +5.x which is normal... Whether it is really winnable or not is another question, but in the case of Crafty, it would certainly know that with KRN vs KRP the side with the KRP is going to win, or nobody is. In this position, this is pretty much moot since since this is a krnp vs kr position... > >Of course a program will be happy here, it is up a knight and a pawn in an >ending. But take white's pawn away and put a random pawn down for black, and >the program will think white is at +2 or more even though there are only very >small winning chances, and black's may even be better. The whole point of this >ending is that black is trying to escape into a drawn case down a piece. >Without endgame databases, white will show a large positive score even if the >position is a draw. > >bruce
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