CREATE TABLE table_name_50 (opponents VARCHAR(255), kick_off VARCHAR(255), h___a VARCHAR(255), referee VARCHAR(255))
Who is the opponent of the match with a H/A of h, Beguiristain Iceta as the referee, and a kick off at 1993-04-18 17:00?
    
SQL: SELECT opponents FROM table_name_50 WHERE h___a = "h" AND referee = "beguiristain iceta" AND kick_off = "1993-04-18 17:00"