Hollywood Squares had the same issues where NBC shifted Squares to 10:30 in October 1976 to do battle with The Price Is Right. That battle was conceded two years later when Squares was shifted again to 1 p.m. (4 p.m. in some markets), and then back to 12:30 in 1979. Maybe NBC could have kept it at 11:30, till maybe 1979.
