CREATE TABLE table_name_69 (date VARCHAR2, score1 VARCHAR2, opponent VARCHAR2)

On what date is there a score1 of 2 - 4 with the opponent Chelsea under 18s?
SELECT date FROM table_name_69 WHERE score1 = "2 - 4" AND opponent = "chelsea under 18s"
SELECT "date" FROM "table_name_69" WHERE "2 - 4" = "score1" AND "chelsea under 18s" = "opponent"