Is there a Query boosting 50-50 over 1000-1 ?

[Shi Hui Liu]

Hi,

Say, I have a query with two terms: A + B, I want to return the documents with 
50 of A and 50 of B on top of documents with 1000 of A and 1 of B. Is there an 
existing Query class can handle this case or I have to implement a new Query?

Thank you,
Shi Hui