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_203_460 ( id number, "player" text, "played" number, "legs won" number, "legs lost" number, "lwat" number, "100+" number, "140+" number, "180s" number, "high checkout" number, "3-dart average" number )

### Question ###
how many players in the 2009 world matchplay won at least 30 legs ?

### Accurate SQL ###

SELECT COUNT("player") FROM table_203_460 WHERE "legs won" >= 30