Author: Ratko V Tomic
Date: 12:28:50 10/19/00
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>I disagree. I think we're weighing differently what we consider typical position, each has in mind different sample. As you point out, different causes (diminishing returns, evaluation errors, position symmetry, quiet vs active positions, etc) act in opposite direction in how they amplify or attenuate the 1 ply difference. Although I agreee that current style programs may be nearing the diminishing returns region in deepening the brute-force search, I was talking about some future more advanced algorithms which will push that region farther. I.e. the point I was making is that the more advanced (far sighteed, not in the brute force sense) the program, the greater difference it will see from 1 ply difference. To use your metaphor, my point there was that a more advanced program will be a more sensitive amplifier. That is a separate issue of whether there is much difference to amplify to begin with in any given position and what is the "typical" position, what is the sample. Whatever the initial difference is, the more sensitive amplifier you use the greater the output difference, or in my terms, the more advanced, far sighted program is the more evaluation asymmetry it will exhibit for 1 ply initial difference (in addition to other visual asymmetries of a position). To put this back in the context of the original discussion, if I am looking at a new program with a performance within the top few, Gambit Tiger for example, one indicator that we're dealing with a new kind of algorithms, the more advanced species of chess programs, would be larger than typical asymmetry in its position status display. A top program which is merely a technically more refined version of the current brute force prgrams would not increase noticably (if at all) the asymmetry. For such program I wouldn't expect to improve much in the next release. But if I see a top program which also shows atypically large evaluation asymmetry, I would be alerted, maybe this is the early scout of the new species which will, within a year or two, drive the current style programs into extinction. Like with genetic mutations (or the hi-tech hype du jour) although most novelties are worthless flash in a pan, the rise of a new advanced species always begins with a novelty.
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