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Subject: What the heck is a single double?

Author: Mark Boylan

Date: 02:04:14 02/11/06


I think I know what a double is, but what's a single double?

In chessbase, if I select "don't copy single doubles" when importing from TWIC,
it almost always finds a significant number of doubles (several hundred). Is it
possible that TWIC has 2-300 doubles each issue? I'm skeptical. What's really
going on?

How does chessbase define a double anyway (single or otherwise)? Is it just a
matching tagset between games? Who's to say that two players with the same name
didn't play in the same tournament? Is it a complete match of the tags and the
movetext? That would be better, but judging from the speed of similar
operations, that's probably not happening. Is chessbase checking for doubles in
the database to which I'm importing, or is it just checking for doubles within
the file being imported?

If chessbase is checking for doubles within the target database, how does it
know which to keep? Personally, I'd want the annotated one, but it doesn't ask
me. What if I have 5 different annotations of Byrne-Fischer, 1956.10.17 and I
drag a few hundred games over that includes a 6th? Will it omit the 6th?

I'm a database programmer and I just can't stand feeling like I'm not in
complete control of my data.

Confused Regards,

 - mark



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