Author: Vincent Diepeveen

Date: 19:03:09 10/25/02

Go up one level in this thread

On October 25, 2002 at 19:20:44, Ingo Lindam wrote: > >>I agree with Bob here. Somewhere in the program you must have a function >>to combine all the probabilities into a comparision with an other >>set of probabilities. >> >>In order to save yourselve loads of system time you could also implement >>that function into the evaluation function, in which case you only >>have to return an integer. >> >>Then you have again a chess engine working at the same way. Away probabilities. >>Just return an integer :) > >Yes, at this point I have to agree as well... ofcourse to compare the >scores/probabilities of two positions I have to obtain a single score at this >moment. The advantage I see in following points: > >a) I can in different situations change the function giving my score out of P+ >and P= (and P-). It's trivial to do that in the evaluation function. Easy to debug compared to doing it in the search. Also 100% the same. >b) more important for me seems the aspect of having clearly interpretable scores >(also in the meaning of distinguishing draw positions and positions with equal >chances) But in the end somehow you must make your chance expectation concrete. The evaluation function is doing that. >c) making decisions based on statistical laws You must see a clear distinction between statistics and search. The search is a brute force method of correctly backtracking the statistical estimation (evaluation function) to the root. >And btw probabilities and integers don't have to be the opposite. You can >ofcourse compare and add -log(p) instead of compare and multiply p. Of course it's complete idiocy to use such functions in a chessprogram, but apart from that, you could do that in the evaluation function as well. >Even more important for me was the suggestion of let the computer use its self >generated patterns derived from a huge data base of games. If you can create an automatic evaluation function that's good and above 800 elo rating, then you can also automatically generate a human from 0s and 1s, because the big step is to make an automatic evaluation function, the next step to apply its intelligence to mankind is just a 5 minute transformation. I do not see how to achieve the first goal however. >Best regards and thank you for feedback. >Ingo

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