Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_2 ( class VARCHAR, rank VARCHAR, entrant VARCHAR, points VARCHAR, chassis VARCHAR )

### Question ###
What was the class when adt champion racing ranked 1st with an audi r8 chassis, and less than 206 points?

### Accurate SQL ###

SELECT class FROM table_name_2 WHERE points < 206 AND chassis = "audi r8" AND entrant = "adt champion racing" AND rank = "1st"