Author: Dan Honeycutt
Date: 18:38:41 07/09/04
Go up one level in this thread
On July 09, 2004 at 19:43:01, Uri Blass wrote: >On July 09, 2004 at 17:12:00, Dan Honeycutt wrote: > >>On July 09, 2004 at 13:24:16, Duncan Roberts wrote: >> >>>sometimes humans to get a draw against computers, block the position >>>leaving the computer wandering about aimlessly doing nothing. >>> >>> >>> >>>why cannot the program tell the computer if nothing is happenning (ie 25 moves >>>have gone (1)without any captures (2) the score is virtually the same >>>(3)none of the computers pieces have gone over into the last 3 ranks and vice >>>versa) then the computer should send over either a bishop, queen or rook into >>>the last 3 ranks if this can be done without losing more than a 1/3 pawn. >>> >>> >>>This should break open the position. >>> >>> >>> >>>Duncan >> >> >>Should break it open but might well cost you the game. A problem with the >>alpha-beta search is that you only know the score of one move - the best one. So >>you really don't know if your liberating move is only going to set you back 1/3 >>pawn, it could be a total disaster. >> >>Dan H. > >You do not need a score for other moves and you only need evaluation that tells >the computer that 50 plies without capture together with some other conditions >is bad for itself. > >The question if it is a good idea is another question and I do not think that >it is productive against computers and the interesting game for me is comp-comp. > >Uri > >Uri If a computer is happy with it's score it has no incentive to make progress in the game until something happens - it finds something better, the 50 move or 3 rep rule approaches, the opponent forces the issue, etc. I took the the original poster's question to be "when you see a lack of progress, why not prod it along by playing a liberating (albeit slightly inferior) move". My reply was just that that can be a very risky proposition. Dan H.
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