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Subject: Re: SSDF-database statistics

Author: Keith Ian Price

Date: 20:40:08 10/19/97

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On October 18, 1997 at 08:13:03, Tony Hedlund wrote:


>			31%
>E1 (164)E12 (89)	29%	total  46-54
>			39%
>Queenindian seem to be the name of the game for black..
>

I checked 13700 QI games between human masters, and while white's
winning percentage is close, the draws and black wins are much
different. Your sample size is small, but I wonder what makes it
different for computer-computer games. It would be good if everyone who
tests two programs against each other at 40/2 could submit the results
to a central area where everyone could download the results. With a
larger sample to work with, some trends could be identified that might
help the chess program authors to handle their opening books better. I
don't mean killer books, but just lines that seem to do well against all
computers as black or white.

Data from 13700 human games:

White wins 34.66%
Draws      43.00%
Black wins 22.34%

This fits in with the general perception that the Queen's Indian is
drawish.

The main line variation was even more so (5154 games):

White  31.67%
Drawn  46.71%
Black  21.62%

I think that SSDF should perhaps require submission of PGNs from all
testers to validate the data, and to create data as described above.

Thanks for your interesting post,

kp



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