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ChessBase 13
with a powerful tool to identify and eliminate doubles. Select a database in the
database window and click Find double games. You will get a dialog box in which you
can specify the criteria which define the doubles and tell the program what to do with
them.
First game
If you have added a few games to a large database you can start from the game
number of the first imported game. This will save a lot of time, since ChessBase does
not have to check all the original games against each other.
Number of moves
Checking very short games (especially those with zero moves) wastes time and is
usually pointless. You can avoid it by selecting a minimum game length.
Clip doubles
This copies all identified doubles to the clip database. You can browse through them
there if you want to manually check the doubles ChessBase wants to remove.
Ignore result
If the quality of the games is very low the same game can be given with a different
result. You can make ChessBase identify them anyway. It takes longer for the program
to process the database, but more doubles are found.
Ignore year
Sometimes even the year might be incorrect, and you will want to make ChessBase
find doubles with different dates attached to them. This slows down the process but
produces more hits.
Names exact / similar / ignore
If you select Similar then similar spellings will be accepted as belonging to the same
player, e.g. Müller = Muller, Yussupov = Jussupow, Kortschnoj = Korchnoi, etc. Capitals
and small letters will also be ignored.
Tournaments exact / similar / ignore
ChessBase 2014