Queen of the board

I have be reading a book called Queen of the board. 
The story is tallying us that there are two sister that are not nice to each other.Her sister Tiana won the school chess. Tiana is also boss's.
There was a chess competition we staring soon the sister but there name down on the chess competition. The competition day stared her Tiana sister was matching with the second  best play.Her sister won and she lost.