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Subject: Re: Opponent specific learning...

Author: Robert Hyatt

Date: 20:18:54 03/30/98

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On March 30, 1998 at 17:36:03, Edward Screven wrote:

>On March 27, 1998 at 14:33:41, Bruce Moreland wrote:
>
>>>On March 26, 1998 at 13:04:34, Dan Homan wrote:
>>>
>>>>It
>>>>wouldn't be very hard to create a 'profile' for every player
>>>>who plays my program and store information about the effectiveness
>>>>of certain openings (and other things, as I think of them).
>>>
>
>>The programs that play on the chess servers or the web, or commonly play
>>in tournaments with multiple opponents, may benefit from being set up to
>>do this.  Or perhaps not, since your opponents tend to learn from each
>>other's play against you.  In some cases you really are playing against
>>one entity -- the user community, which manifests itself in a variety of
>>forms, each with individual quirks, and each with a degree of ability to
>>learn from the other parts of the community.
>
>if you are trying to play better against a community by learning
>from games played against members of the community, then i think
>it would pay to have some kind of per-member model.
>
>at a minimum, i think you would want to know the overall strength
>of each member.  if your program wins against a weak player, that's
>not very interesting, and neither is losing to a very strong player.
>in both cases, whatever experience you glean from such games should
>have less weight than extracts from games lossed to weak players or
>won against strong players.
>
>a half-assed way to do this on a server would be to only learn from
>losses, which makes since if you think your program is stronger than
>most opponents.


Learning from losses only won't work.  I did it.  You simply learn that
*no* book move is playable, because you will likely lose one game in
each
opening if you play strong enough players.  You also have to fold in
wins
and "equal games" or run the risk of having no book.  Think about the
limit of the equation where all scores are "losses"... :)

I didn't, and I woke up a year ago with no book left...  and did a
redesign
right quick.. :)




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