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Subject: Re: Fritz 6 & ELO Rating function

Author: Mike S.

Date: 16:36:54 01/04/00

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On January 04, 2000 at 17:51:40, James T. Walker wrote:

>(...)Junior won the match
>20.5 to 19.5.  When I added the 40 games to the database and clicked on "Create
>ELO Start List" to my surprise, Fritz was rated higher than Junior. (...)

This sounds surprising to me also at a first look. But there may be an
explanation: If you let calculate a starting list, every player's rating is set
to 2400 at first - but there is a minimum of games for a player to get rated I
think. If some of Junior's opponents, from the earlier games, didn't reach this
minimum (or had very low ratings), then it's possible that Junior therefore gets
a low rating himself. His opponent's average may be much lower than Fritz' in
your database.
I would try the following: Make a database like it was before (without the Fritz
6 games), and make a elo starting list. Set the resulting ratings into the games
(menu item "set elos in games"). Add the Fritz 6-Junior match to the database.
Mark only these new games in the list and choose "add to elo list".
I did not simulate this whole process on my computer, but it should take the
former rating of Junior as a basis, although it could be reduced a bit if the
percentage is lower than before. Please backup everything before you try...

Regards,
M.Scheidl



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