Author: blass uri
Date: 15:39:43 06/02/98
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On June 02, 1998 at 16:48:17, Komputer Korner wrote: >On June 02, 1998 at 11:22:58, blass uri wrote: >>good players do also other things >> >>1)they know they should analyze a move >>that they think it leads to an unclear position >>(for example if they think to sacrifice material for initiative) >> >>2) if they do not see a forced line >>(they have no time to check all the possibilities) >>they can use a statistics to decide >>if they see in a position that every line they analyze >>leads to their win when they play against themselves >>they decide to go to the position. >> >>3)good players see there are moves that should not be analyzed >>when in the alpha-beta we analyze every legal move to prove it is not >>the >>best. >>Uri I admit I should not write 3 because you can use the alpha-beta for a tree of logical moves instead of a tree of legal moves. > > >It is not a requirement of alpha beta that every move be analyzed. Alpha >beta is actually a rigorous mathematically sound rule that certain moves >do not have to be analyzed because mathematically they have been shown >to be inferior without having to search their move trees. You are >confusing alpha beta and intuition. They ARE NOT exact opposites of each >other despite what you think. >Chess players are intuitive even Kasparov. This is necessary because of >poor human calculation speed. Chess computer programs can be either >selective search or full width. Either way they all use alpha beta which >is really only a mathematically pruned minimax. Even humans use alpha >beta. Your argument is with intuition, knowledge and full width >searching. What you call knowledge is stuff that hasn't been programmed >into chess computers yet. It is very difficult to teach a robot to pick >up a glass off of a table. You accomplish that task very easily. The >same thing goes for teaching chess knowledge to a program. Don't confuse >a mathematical principle like Alpha beta with chess knowledge. You are right I confused the alpha beta with chess knowledge what not to search. > I think >it is time for Bob Hyatt's yearly alpha beta lesson because it is clear >you do not understand what alpha beta is.
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