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Subject: Re: A Weird (and Illegal) Game in Big Database '99

Author: Michel Langeveld

Date: 07:24:41 09/26/99

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>Two hours after I started toying around with ChessBase Big Databse '99, I came
>across this startling game:
>-- Kosashvili,Y - Comp Mephisto Berlin Pro , AEGON 1996 (Game No. 925451) --
>There is a White pawn at f6. Nonetheless, Black plays 54. .. Kg7.
>Then comes 55. fxg7, and the game continues, with one (!) king on the board.
>
>Any comments?
>How could someone enter such a game?
>Why does ChessBase ( I use ver. 7.0 ) replay it without complaining?
>
>(If this game was disscussed here before, I apologize, but as I said, I used
>this database for 2 hours)
>
>Amit

The situation you described above is just because a movebyte has changed. If you
really want which byte has changed and what value it has to be then I can tryto
find this out for you but this will take a lot of time, and I don't have that.

It's possible the make very silly moves if you know the format of the CBG
format. Like capture the queen/king at move 1 from the initial position.

There are some other errors in the BigBase 99 also like the year number of
games: 23610, 1072499, 1072501. All errors are confirmed to be present in Big
Base 98. So it seems ChessBase has used tools to construct this database and had
not typed it in all by theirself.

Also due to bugs in CB7 there will become errors in the database if you heavily
work with your database and the product crashes. You can also make your database
corrupt by opening files and then try to open the SAME database in CB7.

If you are interested in the internal format of CBH, etc then take a look at:
http://stad.dsl.nl/~rudolf

kind regards,

Michel Langeveld



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