Concentration is an American tv game show based upon the kids s memory game of the exact same name. Matching cards stood for rewards that participants could win. As matching sets of cards were gradually removed from the board, it would gradually expose components of a rebus puzzle that contestants needed to fix to win a suit. The show was broadcast on and also off from 1958 to 1991, presented by numerous hosts, as well as has actually been made in a number of various versions. The initial network daytime collection, Focus, appeared on NBC for 14 years, 7 months, as well as 3,770 newscasts (August 25, 1958-- March 23, 1973), the longest constant run of any kind of game show on that particular network (Wheel of Lot of money was a month shy of connecting that document when the initial NBC run upright June 30, 1989). This collection was held by Hugh Downs and later on by Bob Clayton, however, for a six-month period in 1969, Ed McMahon held the collection. The collection started at 11:30 am...