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_71756 ( "Rider" text, "Matches" real, "Rides" real, "Bonus Pts" real, "Total Points" real )

### Question ###
What is the smallest number of matches with Bonus Pts of 19 and Total Points greater than 421?

### Accurate SQL ###

SELECT MIN("Matches") FROM table_71756 WHERE "Bonus Pts" = '19' AND "Total Points" > '421'