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Subject: Re: Junior-Crafty hardware user experiment - 17th game

Author: Peter Berger

Date: 15:32:21 12/18/03

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On December 18, 2003 at 18:18:40, Robert Hyatt wrote:

>On December 18, 2003 at 16:14:58, Peter Berger wrote:
>
>>On December 18, 2003 at 15:58:54, Robert Hyatt wrote:
>>
>>>On December 18, 2003 at 15:45:17, Peter Berger wrote:
>>
>>But I really can't understand how you can say that Crafty likes variety against
>>computers - with default settings it certainly has the narrowest book against
>>computers from all engines I have ever seen. And I really think this is a very
>>bad idea as partially also shown in this match. Thank good that even the 3%
>>moves sometimes show up eventually - it might save Crafty's head in this match
>>;).
>>
>
>You missed my point.  I mentioned "ICC".  There variety is _critical_ or
>the opponents keep finding book lines that lead to trouble for Crafty.  With
>a wide book, they have a much harder time.  For matches, I would certainly play
>with "aggressive learning".  As far as "3% moves" I don't know what that might
>be.  IE I don't (to the best of my knowledge) have any "play 3%" lines in my
>book.

Did I really miss your point? At ICC some of your opponents are computers too.
You will face them with the same book as used here - wrong? To call Crafty's
book wide is really wrong - I will try to reach you the last time with this
message, aware that I am _most_ probably not the first one to come up with this
anyway. To answer your second question: given 1. e4 e5, Crafy being white: what
is the probability that it will play 2. Bc4 against a computer?

>If you try to use it in an important way, the best idea is to ask.  :)  Then
>I can tell you how I would do it.  And in a match against a single opponent,
>I'd go for aggressive learning and put the onus on the opponent to thwart it
>if it can.  :)

It is not for me to decide if I used Crafty in an important way. I certainly
used Crafty exactly as you recommended it for this match. If my memory failed
and I misunderstood one of your recommendations as archived in the CCC files,
please point out the message I missed - I will simply redo the match.

Peter



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