Author: Uri Blass
Date: 11:40:52 10/17/05
Go up one level in this thread
On October 17, 2005 at 08:42:12, Mike Hood wrote:
>On October 17, 2005 at 08:03:49, Vladimir Medvedev wrote:
>
>>
>>>I was thinking why not have an algorithim that can recognize certain aspects of
>>>the position and then accordingly change parameters "on the fly". For example
>>>in the opening it would use certain parameters, then when the position becomes
>>>dynamic again a change in parameters, if both bishops are on again another
>>>parameter.
>>
>>A brilliant idea: when position is good algorithm should evaluate it as good,
>>and when position is bad, it should be evaluated as bad. I wonder why no chess
>>programmer implemented this simple approach during 40+ years of chess
>>programming...
>
>The problem with this approach is: apart from very general classifications
>("opening", "middlegame", "endgame") it would be necessary to build the position
>recognition and parameter alteration into the algorithm in order to analyse a
>position. And if a position is recognized, why not just add a positional offset
>point or two to the evaluation rather than alter the parameters? Even obvious
>positional criteria such as passed pawns aren't as clear cut for parameter
>changes. There may be a passed pawn on the board now, but it could be gone after
>6 plies into the search.
>
>I'm not saying that the dynamic parameter approach is impossible to implement.
>All I'm saying is that this approach would probably lead to an overall weaker
>engine.
I think that it is possible to use this approach in opening book.
opening book today include only moves.
I think that it may be better to include after every move recommended
personality to use in case that the opponent get you out of book.
The main problem with this approach is that you may need a lot of testing to do.
You may find that personality X does the engine 50 elo better in lines that are
A54 based on the ECO but you may need months of testing by a tester in order to
get the details of personality X .
I think that in order to succeed with this approach you may need hundrends of
testers when everyone of them will investigate different ECO line and no
programmer have today hundreds of testers to help him to improve his program.
Uri
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