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_21 ( date VARCHAR, margin_of_victory VARCHAR, runner_s__up VARCHAR )

### Question ###
What date has a margin of victory of 1 stroke over Greg Kraft?

### Accurate SQL ###

SELECT date FROM table_name_21 WHERE margin_of_victory = "1 stroke" AND runner_s__up = "greg kraft"