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_22517564_3 ( starting_odds VARCHAR, opening_odds VARCHAR )

### Question ###
What were the starting odds for the opening odds of 2-1?

### Accurate SQL ###

SELECT starting_odds FROM table_22517564_3 WHERE opening_odds = "2-1"