Kazakhstan Youth Tourney question

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Avatar of BCchessnut

I have been watching the Kazakhstan Youth Tourney- specifically the under 10 girls games of

Aliya Zhumambayeva and see on the tourney info pages:

http://chess-results.com/tnr729690.aspx?lan=1&art=1&rd=7&fed=KAZ&turdet=YES

That she is  7-0 and in first place.

What I'm wondering is:

What do the TB1,TB2, and TB3  columns mean?

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