Author: Uri Blass
Date: 08:03:42 07/06/02
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On July 06, 2002 at 10:25:44, Robert Hyatt wrote: >On July 06, 2002 at 01:28:07, Ricardo Gibert wrote: > >> >>When I read in CCC that the Deep Blue search had an EBF of about 4, my thoughts >>were, "Ugh! That means that in about 50 years of the expected hardware >>improvements, the PC programs of the day will be able to surpass Deep Blue even >>if Deep Blue were to get the commensurate hardware improvements." > >The problem is that you are making a _classic_ mistake. The EBF has _nothing_ >to do with how the two programs will compare. What is important is the _tree_ >that both search. If one does a 20 ply search, and the other does a 10 ply >search, but they search the same tree, then they play equally tactically. > >Don't get hung up on a 20 ply search depth (iteration number). It doesn't >mean a thing when compared to _other_ programs.. > > > >> >>The big advantage in EBF of the then current programs is like a juggernaut that >>cannot be stopped. That I was not impressed with Deep Blue is an understatement. >>Deep Blue was superior...then, but this was *despite* its method of search. Its >>hardware made it superior and not its search methods. > > >Its search methods are far from primitive. IE they have been doing singular >extensions since the late 1980's. Others started to copy the idea much later. I am interested to know about a single programmer who copied the way that they used singular extensions. There are programmers who use singular extensions but I know about no programmer of one of the top programs of today that use it in the way that they use it. If their ideas about singular extensions were so good how is it possible that nobody copied their algorithm succesfully until today and even people who use singular extensions(bruce moreland) use inferior algorithm if we believe you about it. Is their algorithm about singular extensions a secret? Uri
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