Author: Zappa
Date: 12:15:03 12/21/05
Go up one level in this thread
On December 20, 2005 at 16:47:26, Albert Silver wrote: >On December 20, 2005 at 16:30:11, Stuart Cracraft wrote: > >>On December 20, 2005 at 15:17:25, Alex Schmidt wrote: >> >>>Hello, >>> >>>Vasik Rajlich kindly agreed to give us an interview: >>> >>>http://www.uciengines.de/UCI-Engines/Rybka/vriv/vriv.html >>> >>>Thank you Vasik, >>>Alex >> >>Good interview. Nice to attach a face and a personality with the program's >>author. I wish they had gone into his formal studies more. He studied at MIT? >>Anybody have some detail about that? >> >>The comment about his having learned much, in regards to search, from Fruit, >>is a great clue. So he gets that search, adds some to it, then tacks on >>a monster evaluation for middle-game stuff, and voila, Rybka. > >Learning a number of things from Fruit's search, and just taking at and adding >some to it, aren't exactly the same thing. He does say, "Anyway, if I really had >to give a number - my wild guess is that Rybka would be 20 rating points weaker >had Fruit not appeared." > >I'm not an engine programmer, but I have never gotten the impression one could >simply tack on a monster evaluation to a search, any search, without adding the >equivalent of brakes and handbrakes to the engine's speed. Is Fruit so different >that this can be done at so little cost? Well part of that depends on how good of a programmer you are :) Fruit doesn't have a big evaluation. Mainly it just evaluates mobility. anthony >And if it isn't so different, then his search can't be simply Fruit's plus some, >can it? > > Albert > >> >>Although I have the source code for Fruit 2.1, the thought of going through >>any other person's program is really anathema to me nowadays. I get a feeling >>it will "taint" me. And of course, that just taint so. >> >>So what is so special about Fruit 2.1's search? Anyone analyzed it care to >>comment? >> >>Thanks, >> >>Stuart
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