Author: Charles Unruh
Date: 17:41:08 11/01/99
Go up one level in this thread
Inquiring minds want to know! >On November 01, 1999 at 10:56:41, Bas Hamstra wrote: > >>Hi, Vincent, >> >>Why you always say piece square programs are worth nothing? Not that I use them, >>but I am still considering it. >> >>Because you can put much more knowledge in your program than in a ordinary >>endnode processor. You can build enormous expertsystem-like evals and still have >>a reasonable speed. >> >> > > >They really don't work very well. Because what you evaluate at the root is >_nowhere_ near what you reach at the tips. I, too, believe that piece/square >tables offer some good things... ie what better way to determine that a piece >is centralized, or on the edge of the board. But that ends up being < 1% of >what you want to know about a position. > >Berliner described 'discontinuities' in the evaluation function some 20 years >ago. This is a perfect description of what piece/square tables do today. Every >new move has an eval that is discontinuous from the previous move. Which is not >the way to win chess games over the long haul. Frans showed that they can be >effective. But over time, others have shown that (at least against humans) this >is not the way to go. Computer vs Computer? Who knows or cares... > > > >>Succes op het NK! >> >>Regards, >>Bas. >> >> >> >>On November 01, 1999 at 09:03:20, Vincent Diepeveen wrote: >> >>>On November 01, 1999 at 05:07:36, blass uri wrote: >>> >>>>On November 01, 1999 at 03:34:38, Jeroen Noomen wrote: >>>> >>>>>On November 01, 1999 at 03:00:04, Harald Faber wrote: >>>>> >>>>> >>>>>>Isn't it amazing, the great Tiger far behind? :-) >>>>> >>>>>Chess Tiger is very unlucky in this tournament. It had great positions >>>>>against Nimzo, Diep and Insomniac, but failed to win them. >>>>> >>>>>Best regards, Jeroen Noomen >>>> >>>>I did not see a clear advantage for tiger in the games against diep and >>>>Insomniac >>> >>> >>>DIEP was desparate against Tigre short after book. Then lucky Tigre >>>allowed to exchange pieces. Then score got zero and the endgame tigre nearly >>>played f6?? at a point but lucky for tigre failed low in time and played >>>a much better move. >>> >>>I'm very impressed by the good preparing of Jeroen. I'm not impressed by >>>the Tigre engine. >>> >>>Piece Square tables in the way tigre uses it don't work anymore. >>> >>>It was having the fritz5.16 phenomena bigtime. Before exchanging queen >>>very happy. Then after it was exchanged suddenly seeing it was a more or >>>less drawn position. >>> >>>> >>>>Uri
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