Author: Ed Murak
Date: 00:11:18 12/15/05
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On December 15, 2005 at 03:00:42, Stephen A. Boak wrote: >On December 15, 2005 at 02:35:39, Chrilly Donninger wrote: > >[..] > >>One example for the practical consequences can be found in Rybka: >>Probably a lot >>of users think, when they choose the personality "very positionally", that the >>programm has - in contrast to "very tactically" - more chess knowledge, that >>there is a trade-off between knowledge and search-speed. > >>In fact the 4 personality settings change 2 numbers. These numbers influence >>only the pruning/extension mechanism of the search tree. The "very tactical" >>settings prune less than the "very positional" one. I have not tested the >>differences in the playing styles, but from the theoretical considerations it >>should indeed influence the style. The terms "tactical, positional" are just >>labels. One has to give it a name. > >>The same is probably done in all other programms. E.g. an old Nimzo-version of >>mine had already such a setting. The personalities were called aggressive, >>solid.. These settings changed the shape of the tree in a similar way. Maybe >>Rybka is a Nimzo clone :-) >> >>Chrilly > >Dr. Donninger, > >I understand pedagogical style and humor in education, but I request some >clarification feedback, please. [snip] >You also recently (previously) wrote: > >"Rybka has Bitboards. But thats mentioned in the Readme File. So I am telling >here no big news. > >But I really want to avoid to say some real internals. > >First of all I have not looked on all of Rybkas details. Would be much too much >work and also boring. > >I wanted just to have the big picture. And even if I would know something >important, I could/would not post it. > >This would be against the rules. > >Chrilly" > >Referring to your later posting (at top), and your recent (previous) posting, >quoted above: > >1) Have you changed your mind about disassembling another programmer's work and >speaking about "real internals"? To see that the 4-position "Playing Style" (i.e. personality) switch directly governs exactly two variables is trivial disassembly. To see what these two variables control (as Dr Donninger says, pruning and extension) is less trivial. But are these "real internals", Mr Boak? >2) Are you not speaking, in your opinion, about "something important"? :-) IMO (I am just a beginner in this), yes. >3) Are you breaking "the rules"? We all know there can be unspoken and unwritten rules, and about what. Juridical rules do not concern us, are irrelevant here and I ignore them. When Dr Donninger originally wrote [to do] "This would be against the rules", that relates to _his_ perception _then_ of what the rules were _then_. That gives three degrees of freedom. My above thinking is suitably mechanistic, I hope. Please excuse me for the intervention. >Thanks in advance, >--Steve
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