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_70685 ( "Date" text, "Visiting Team" text, "Final Score" text, "Host Team" text, "Stadium" text )

### Question ###
What is the date that a game at the Alltel Stadium had a final score of 6-20?

### Accurate SQL ###

SELECT "Date" FROM table_70685 WHERE "Stadium" = 'alltel stadium' AND "Final Score" = '6-20'