Author: Robert Hyatt
Date: 12:04:43 06/21/01
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On June 20, 2001 at 14:25:03, John Hatcher wrote: >Maybe the answer to my question is obvious, but I'd be interested in what >programmers have to say on the subject. > >I've recently been running matches between Fritz6 and Chess Tiger. On my old >Celeron 333mhz computer Fritz6 runs at about 250 knps, and Chess Tiger runs at >about 80-100 knps. To my delight, and surprise, Chess Tiger is doing very well >against Fritz - very well. > >Since, as I understand it, "nps" is related (at least nominally) to search depth >in a given time period, it would seem that, all things being equal, the greater >the "nps" the stronger the program. That is correct. But here "all things are not equal". Two different programs, two different search strategies, and two different evaluations. Hence, NPS means nothing at all... > >Of course, things are never really equal between two programs. As evidence of >that, Chess Tiger with its lower nps holds its own quite nicely against Fritz. >For this to happen it would seem that Chess Tiger must have some chess >"knowledge" programmed into it that allows it go toe-to-toe with a program that >searches 2.5x as many positions per second. > >Is the programming of this chess knowledge, even among the programmers of top >commercial programs, still as much art as science so that the programmer of >Chess Tiger has found a "smarter", more efficient way to implement chess >knowledge into Chess Tiger. I guess I supposed that much of this knowledge >would be common currency by now. > >Sorry for the long-winded question. I wanted to be clear. > >JOHN
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