SELECT "Won" FROM table_29404 WHERE "Played" = '22' AND "Lost" = '15' AND "Points against" = '511'
Name the won for played being 22 and points against 511 and lost being 15
CREATE TABLE table_29404 (
    "Club" text,
    "Played" text,
    "Won" text,
    "Drawn" text,
    "Lost" text,
    "Points for" text,
    "Points against" text,
    "Tries for" text,
    "Points" text
)