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Subject: Re: Crafty's progress from 15.20 to 17.11

Author: Dann Corbit

Date: 13:30:23 01/12/01

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On January 11, 2001 at 09:15:04, Steffen Jakob wrote:

>On January 11, 2001 at 09:07:15, Jouni Uski wrote:
>
>>B f F - R a n g l i s t e   A m a t e u r e:
>>
>>Blitz/Aktivschach
>>insgesamt > 31.000 Partien
>>
>>(Cel.525; Book: Noomen-Select, SEE, Nunn1/2-Test)
>>
>>Program                          Elo    +   -   Games
>>
>>Crafty 17.11                   : 2488   17  14  1514
>>Crafty 16.6                    : 2466   30  38   332
>>Crafty 17.13                   : 2456   35  41   257
>>Crafty 17.14                   : 2445   41  33   286
>>Crafty 16.15                   : 2437   36  35   289
>>Crafty 15.20                   : 2423   58  50   130
>>
>>Question: Has there been real/significant progress after this statistics?!
>
>About one year ago I introduced a sophisticated queen mobility eval term in
>Hossa. This term is very expensive. Now I see games from time to time where
>Hossa captures the opponents queen even in the middle of the board or gives away
>a pawn to keep the opponents queen unmobile for a long time. On the other hand
>Hossa got slower and overlooks tactical shots more often than before that
>change. I didn't notice any significant rating change when I added this feature.
>Would you say that I made any progress here? ;-)

Two different goals appear:
1.  Play good chess.
2.  Win lots of games.
The two goals are not necessarily identical.

With greater CPU speed, it may become more valuable (or more of a hindrance!).
Sometimes, I think both kinds of approaches have great value.  Having people try
different things makes the chess played by the programs more interesting.



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