SELECT MIN("Year") FROM table_71268 WHERE "Winner" = 'matthew king' AND "Score" > '270'
What was the earliest year during which the winner was Matthew King, and during which the score was higher than 270?
CREATE TABLE table_71268 (
    "Year" real,
    "Venue" text,
    "Winner" text,
    "Country" text,
    "Score" real
)