Concentration (game show)
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|Also known as||Classic Concentration (1987–1991)|
|Created by||Jack Barry
|Presented by||Hugh Downs (1958–1969)
Jack Barry (1958, nighttime)
Bob Clayton (January–March 1969, September 1969–1973)
Ed McMahon (March–September 1969)
Jack Narz (1973–1978)
Alex Trebek (1987–1991)
|Narrated by||Bill McCord (1958)
Art James (1958–1961)
Jim Lucas (1961–1963)
Bob Clayton (1963–1969)
Wayne Howell (1969–1973)
Johnny Olson (1973–1978)
Gene Wood (1987–1991)
|Opening theme||"Concentration Theme" by Paul Taubman (1958–1967)
"Fast-Break" by Score Productions (1973–1978)
"Classic Concentration Theme" by Score Productions (1987–1991)
|Ending theme||same as open|
|Country of origin||United States|
|No. of seasons||15 (1958–1973)
|No. of episodes||3,770 (1958-1973)
|Executive producer(s)||Norm Blumenthal
New York, New York (1958–1973)
Hollywood, California (1973–1978)
Burbank, California (1987–1991)
|Running time||approx. 26 minutes|
|Production company(s)||Jack Barry-Dan Enright Productions (1958)
Mark Goodson-Bill Todman Productions (1973–1978)
Mark Goodson Productions (1987–1991)
|Distributor||Jim Victory Television (1973–1978)|
|Original channel||NBC (1958–1973, 1987–1991)
Syndicated (daily, 1973–1978)
|Picture format||Black-and-white (1958–1966)
|Original run||August 25, 1958 - March 23, 1973
September 10, 1973 – September 8, 1978
May 4, 1987–September 20, 1991
Concentration is an American television game show based on the children's memory game of the same name. Matching cards represented prizes that contestants could win. As matching pairs of cards were gradually removed from the board, it would slowly reveal elements of a rebus puzzle that contestants had to solve to win a match.
The show was broadcast on and off from 1958 to 1991, presented by various hosts, and has been made in several different versions. The original network daytime series, Concentration, appeared on NBC for 14 years, 7 months, and 3,770 telecasts (August 25, 1958–March 23, 1973), the longest run of any game show on that network (Wheel of Fortune was a month shy of tying that record when the initial NBC run ended on June 30, 1989). This series was hosted by Hugh Downs and later by Bob Clayton, but for a six-month period in 1969, Ed McMahon hosted the series. The series began at 11:30 AM Eastern, then moved to 11:00 and finally to 10:30. Nearly all episodes of the NBC daytime version were produced at 30 Rockefeller Plaza, New York City.
A weekly nighttime version appeared in two separate broadcast runs: the first aired from October 30 to November 20, 1958 with Jack Barry as host, while the second ran from April 24 to September 18, 1961 with Downs as host.
A pilot for a third version was attempted in 1985, hosted by Orson Bean, but did not sell. After some reformatting, a remake called Classic Concentration, hosted by Alex Trebek, ran on NBC from May 4, 1987 to September 20, 1991 (with reruns broadcast to December 31, 1993).
Despite numerous attempts to develop a new version in recent years, NBC-Universal Studios, owners of the Concentration copyright, have not yet authorized a new version of the program.
- 1 Development
- 2 Rebuses
- 3 Rules
- 4 NBC (1958–1973)
- 5 Syndication (1973–1978)
- 6 Classic Concentration (1987–1991)
- 7 Home games
- 8 Episode status
- 9 International versions
- 10 References
- 11 External links
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Veteran game-show host Jack Barry and his producing partner Dan Enright, along with Robert Noah and Buddy Piper, created Concentration, but others working at Barry & Enright Productions also contributed to the show's development. The full end credit roll after the NBC takeover had a title that read "Based on a concept by Buddy Piper".
The creation involved the combination of two key creative concepts: the children's game of matching cards, and the use of a rebus puzzle that was revealed as matching cards were removed from the board. In place of the playing cards, the game board featured a board consisting of 30 "trilons", or three-sided motorized boxes, with numbers on the first of their three sides; prizes, that were to be matched, on the second; and "puzzle places" on the third. The gradual matching of card pairs slowly revealed elements of the rebus, a picture puzzle described below.
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The rebus form is centuries old and has been used in various forms. The most popular contemporary form prior to Concentration involved pictures, letters and numbers as well as plus and minus signs to add or delete parts of a word or phrase (e.g., WICK [an arrow pointing at a candle wick] + E + PEA [picture of pea] + D + UH: WIKIPEDIA)
The member of the Barry-Enright development team responsible for the development and art direction of the puzzles was Norm Blumenthal, who later became the original series' producer. He simplified the rebus form for television, allowing only plus symbols, and subsequently devised all of the puzzles seen on the original series. In his version of a rebus puzzle, which became Concentration's standard, a rebus is a puzzle made up of a combination of pictures, letters, words and numbers connected by plus signs. When solved, it gives a well-known title or phrase. For instance:
- A picture of a convict (CON)
- A plus sign
- A picture of a penny (CENT)
- A plus sign
- A picture of a serving tray (TRAY)
- A plus sign
- A picture of a human leg, shin highlighted (SHIN)
CON + CENT + TRAY + SHIN (CONCENTRATION).
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Two contestants (one a returning champion) sat before a board of 30 squares. Each square was composed of a trilon that concealed the rebus, names of prizes, and special squares.
One at a time, the contestants called out two numbers. If the prizes or special action did not match, the opponent took a turn. However, if the contestant did match, whatever prize was printed on the card was placed on a board behind the contestant; or, he/she could perform an action. The second number had to be called out within a certain time limit, otherwise the contestant's turn ended. It was also permissible to pass on one's turn. This usually happened during the course of a game if a contestant called out a prize card that had been orphaned as the result of a wild card match (see below).
More importantly, a match also revealed two pieces of the rebus, which identified a person, phrase, place, thing, etc. The contestant could try to solve the rebus by making one guess or choose two more numbers. There was no penalty for a wrong guess; even if he/she was wrong, he/she kept control. Usually, a contestant waited to solve the puzzle until he/she had exposed a good portion of the rebus through several matches. In rare instances, the puzzle was solved with only a few clues showing.
Also included were two or three joke or gag prizes (such as a banana peel or a tattered sock). Over the years, the gag prizes included some creatively bad puns and wordplay. These actually served as protection against matching the forfeit cards upon which he/she might stumble.
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In addition to the prize cards, there were the following action cards:
- The Wild Card provided an automatic match. In the original game this left the natural match "orphaned," only able to be matched by the other Wild Card, of which there were only two on the board. If the contestant matched the same prize to both Wild Cards, a check mark was placed next to the prize on the contestant's board, and that contestant would win two of that prize if s/he solved the puzzle.
Contestants uncovering both Wild Cards simultaneously also won a bonus that was theirs to keep regardless of the game's outcome. Originally, this was $500 but late in the run was changed to a new car.
- Take One Gift: Appeared on two cards in each game. If a contestant matched them, he/she could take his/her choice of any of the prizes listed on their opponent's prize board. Of course, the game had to be won to receive all prizes listed on his/her prize board.
- Forfeit One Gift: Appeared on six cards in each game. Any contestants who matched two of them had to forfeit one prize to their opponents.
- Bonus Number: Appeared on four cards in many games. A contestant who matched them got a chance to select three numbers as opposed to the usual two. This was used only in the 1973–1978 syndicated edition hosted by Jack Narz. (See the section below dealing with these editions.)
Solving the puzzle
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If a contestant solved the puzzle, he/she won all of his/her accumulated prizes. If there were no legitimate prizes in the rack, he/she was awarded $100. The loser forfeited all his/her gifts accumulated in that game, but still received token parting gifts as well as a copy of the show's home game. There was no bonus round in the original version of the show.
Occasionally, a game ended with only two prize cards left on the board, which because of the wild cards often did not match. In such instances, the unmatched cards were turned over to reveal the entire puzzle, and the contestant who made the last match was allowed one guess to try to solve it first. If he/she guessed incorrectly, his/her opponent was allowed to make one guess. If both guessed incorrectly, the game ended in a draw. A new game was played and each contestant was allowed to carry over a maximum of three prizes.
Occasionally, a game could not be completed due to time constraints. A sequential two-tone sound resembling a doorbell would be heard signaling time was up for that episode, and play was suspended. Play would resume at the start of the following episode with the board reset to the point where time was called. A new rebus puzzle was substituted and the prizes remained the same, but were behind different numbers.
Champions continued until they either were defeated or had won 20 games.
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Concentration remains the longest-running game show on NBC and held the record for longest continuous daytime run on network television until it was eclipsed in April 1987 by the CBS daytime version of The Price is Right (beginning September 4, 1972). Concentration is currently the fourth longest-running daytime/syndicated game show behind The Price is Right and the syndicated versions of Wheel of Fortune (1983–present), and Jeopardy! (1984–present).
Concentration was an NBC in-house production, apart from the earliest episodes. As a result of the 1950s quiz scandals, the network purchased the rights to Concentration and three other games (Twenty One, Dough Re Mi and Tic-Tac-Dough) from producers Barry and Enright. NBC/Universal still holds exclusive rights to both the format and extant episodes of Concentration; however, due to Financial Interest and Syndication Rules, this version is owned by CBS Television Distribution.
Concentration's original host was Hugh Downs. The show was produced and broadcast live at 11:30 am Eastern on weekdays in black-and-white, and quickly became the most-watched daytime series in NBC's lineup. The announcer was Art James, who sometimes served as a substitute host and later became a game show host in his own right. The series was produced in NBC's Studio 3A which now houses NBC News and MSNBC.
The series then moved to 11:00 am and slowly introduced color broadcasts. For a picture puzzle game whose rebuses were designed and painted in monochrome, this required some design changes: The colors of the numbered cards might otherwise interfere with the colors used on the rebus, a critical issue for contestants playing in the studio and for viewers who played along at home. During this period, the series was produced in NBC's Studio 6A. Hugh Downs, by this time also an anchor correspondent on NBC's Today Show, remained host, and the announcer became Jim Lucas, who also worked on NBC's local New York radio station, WNBC-AM. In September 1965, the show moved to 10:30 am where it would spend the remainder of its run on NBC.
In January 1969, Downs stepped down to devote his entire attention to Today. Bob Clayton, who had succeeded Jim Lucas as announcer, took over the hosting duties but in March, NBC set him aside in favor of Ed McMahon due to advertiser pressure. However, Clayton returned in September and remained host until the series ended. On the Monday following Concentration's cancellation on NBC, Clayton became the announcer for The $10,000 Pyramid on CBS. NBC staffer Wayne Howell replaced Clayton in the announcer's booth during his tenure as host.
Seen daily for nearly 15 years, and consistently one of the most popular series on NBC, the original series included many special features. Among the series' popular special features:
- The Envelope and its Mysterious Contents — The winning contestant opened a sealed envelope and read its message aloud (as if he/she were the show announcer). Generally, it mentioned an inexpensive prize and further reading proved it to be an expensive prize, such as large amount of cash or a new car.
- The Cash Wheel — A contestant spun a carnival wheel containing various dollar amounts with a top prize of $2,000.
- Christmas shows featured children from United Nations countries. Secret Santas included Joe Garagiola, Victor Borge, and other celebrities. Proceeds went to C.A.R.E., which built two schools in Africa from funds raised by the series (Blumenthal and Downs received awards from the organization for the proceeds).
- International Salutes — All prizes in these games were from the specific country saluted. For example, a salute to Mexico had contestants wearing sombreros, Downs dressed as a matador, and model Paola Diva playing a colorfully costumed señorita driving a mule-driven cart.
- An annual Boy Scout Show, saluting famous Americans who were scouts. Den Mothers and Scouts played the game and won prizes for themselves and their troops. Girl Scout shows also became an annual event.
- The Challenge Of Champions — Beginning in 1963, Concentration inaugurated a tournament of champions, which pitted the top four contestants of the previous 12 months in a best-of-seven tournament (styled à la the World Series). The grand prize was $1,000, a trip around the world and a special trophy dubbed "The Connie", modeled after Auguste Rodin's The Thinker. One of the participants in the very first tournament was Brooklyn Dodgers pitcher Ralph Branca, who won 17 games on the show.
Throughout the competition, participants, including Downs, Clayton, and Blumenthal, wore blue blazers with the show's logo, known as the "mystery logo," embroidered in gold on the breast pocket. The "mystery logo" blazers continued to be a part of the host's wardrobe until the show ended in 1973.
During another contest (c. 1970), home viewers could win a prize based on the initial of their last names corresponding to a number on the board. To enter the contest, one merely had to send a postcard to the address given. These postcards were placed in a rotary drum and Clayton would draw a card and read the name. If the prize card was for a gag prize or "forfeit one gift", the home viewer received $100. If it was "take one gift", a $250 prize was awarded. If it happened to be a wild card, the home viewer won $500. The contest was held at least once a week, and frequently with several drawings per show.
On one episode during this time, a viewer from Oklahoma won a motorboat. Host Bob Clayton made the mistake of asking "What could he possibly do with a boat in Oklahoma?", after which the show was inundated with brochures on Oklahoma lakes. In fact, most Oklahoma lakes are man-made in response to the Dust Bowl.
Through nearly all of the original series' run, the program was produced by Norm Blumenthal. He not only created every one of the 7,300 puzzles used on the show (with no repeated puzzles), but also every puzzle utilized in all 24 editions of the Milton Bradley home game.
The prize values on the original series were deliberately much smaller than those of Barry and Enright's other games, especially the big-money games (not just their own) implicated as part of the 1950s quiz show scandals. The winnings were kept at a low amount on purpose to avoid any suggestion that it was also tainted. When the network took over production shortly after the series began in 1958, NBC maintained this policy, although this may have been for reasons unrelated to the scandals.
Usually, there was at least one prize worth more than $1,000. However, nearly all the other prizes were worth less than $500, with many in the $10–$100 range. A board of prizes rarely totaled more than $2,000–$3,000 and champions rarely took home more than that in merchandise during their stay (though some longer-reigning champions approached $10,000).
Additionally, there were countless gift certificates, travel trailers, airplanes, swimming pools, furniture, kitchen appliances (large and small), rooms of furniture, clothing, stereos and televisions, fantastic nights out on the town and virtually any other item seen in any mail-order catalog. One history of the original NBC version reported the total prize giveaway at $10,000,000.
For most of its run, Concentration faced sitcom reruns on CBS and local programming on ABC affiliates, easily dominating them in the ratings. However, in September 1972, CBS launched The New Price is Right at 10:30/9:30 and drained off more than half of the Concentration audience. Rather than move the game, NBC concluded that it had reached the end of its life and cancelled it in March 1973.
While the first puzzle on the debut was "It Happened One Night", the last puzzle on the finale was "You've Been More Than Kind". After Clayton said a final goodbye, the credits rolled over a rendition of "Auld Lang Syne".
Five months after NBC canceled Concentration, a daily syndicated series debuted on local stations. The project was a joint venture of syndicator Jim Victory, Mark Goodson-Bill Todman Productions, and NBC, which retained the rights to the show. The syndicated Concentration and its followup Classic Concentration are the only two programs that Goodson-Todman/Mark Goodson Productions produced that did not originate "in house," meaning that they were not created by people working for the company. The show premiered on September 10, 1973 and ran for five years. Jack Narz was host, with Johnny Olson serving as announcer. This version of Concentration was produced at Metromedia Square in Hollywood, and aired primarily on NBC stations that had carried the original series.
Two new contestants competed each day, with no returning champions; and games did not straddle episodes as on the network version (as some affiliates only broadcast the program one evening a week). For the first two years, the basic game was identical to the NBC version with the addition of four "head starts" that revealed half the locations of four prizes on the board. In addition, the gag prizes disappeared and only one pair of "forfeit one gift" cards remained; three pairs of "take one gift" cards were hidden on the board.
Concentration's board had become very colorful. The 30 numbers (now larger) were in red with yellow backgrounds and red frames. Many prize, Forfeit, Take, and wild card spaces had actually come from New York with the original board and were reverse-printed (white lettering on a black background). The rebus was in full color on a sky blue background.
The cash prize if a contestant solved the puzzle with no prizes on his/her side of the board was increased from $100 to $250. The bonus for calling two "Wild Cards" on the same turn reverted to $500 as opposed to a new car as last offered by NBC; the bonus was once again theirs to keep regardless of the game's outcome. In addition, unlike in the original NBC version, the contestant no longer received the opportunity to match the wild card spaces and reveal four parts of the puzzle. Prizes that were once only consolation prizes on the NBC series and other game shows became the prizes on the board. If the board had no more matches and no one solved the puzzle (or if time was running out), the remaining parts were revealed and a contestant rang an electric buzzer to give his/her solution.
Later, four "Bonus Number" cards (eliminating one prize pair and one of the take one gift pairs) appeared during each game. If a contestant matched two Bonus Number cards or combined one with a wild card, then the next time they selected two numbers which failed to match, they were permitted to select a third number.
If time permitted, a third game was played. This time, the object was to match amounts of foreign currency and no head starts were given. All of the special squares (Take 1 Gift, Bonus Number, Wild Card, etc.) remained on the board for this game. The first player to solve the rebus won $100 plus the amount of their currency matches in American dollars, and if time ran out during the game the same rules as noted above applied.
Beginning in the fall of 1975 and continuing through the spring of 1976, more rules were changed to speed up game play. All "Forfeit One Gift" spaces were removed. The board also hid two "Free Look" spaces. Selecting one instantly revealed that particular portion of the rebus and allowed the contestant who selected the space the option of taking a guess at the puzzle. Two more wild card spaces were added to the board and the prize for matching them was reduced to $250. Contestants now called a third number in the first game if the first two picks did not match (later changed to having a third pick in both games). All of the remaining original trilon cards were scrapped and replaced with new graphics. The rebuses were also made shorter and easier.
The syndicated version of Concentration was the first in the series to employ a bonus round. The champion of the game played the round, which was called Double Play. The champion was given ten seconds then shown a fully revealed rebus puzzle. If the contestant solved the puzzle, the clock was stopped and the champion won $100. A second rebus puzzle was then shown, and if the champion could solve the puzzle with the remaining time, the champion won a grand prize.
For the first four seasons, the grand prize was always a new car. Beginning with the fifth season in 1977, the champion determined the grand prize at the start of the bonus round by trying to match squares on a nine square board. The car and three prize packages of differing values were available in each Double Play round. The champion called numbers one at a time, and the first item matched determined the prize for solving the second puzzle. A wild card was also on the board, and if it was uncovered at any point, the champion played for whatever prizes had been uncovered prior to finding the wild card.
The music for a Double Play win was later used on The Price Is Right during prize descriptions of a car. Many other cues from The Price Is Right were used on Concentration as well, including music used for the head starts and Double Play prize descriptions.
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Despite these changes, the show's ratings fell and many stations (including former flagship WNBC in New York) moved the show to either pre-dawn hours or other non-prime time access slots and dropped it in Spring 1976. Some independent stations then picked up the show for its final two years.
On September 8, 1978, the second version of Concentration aired its final episode and left the airwaves, with the exception of several markets who opted to air reruns for an entire season until fall 1979.
Classic Concentration (1987–1991)
In 1985, Mark Goodson Productions was set to launch an hour-long game show block with a new syndicated version of The Price Is Right and a revived Match Game. However, after concerns about Gene Rayburn's advancing age were raised (he was 67 years old at the time), the Match Game revival was scuttled and Goodson sought permission from NBC to try Concentration again. A pilot was shot in 1985 with Orson Bean hosting but failed to sell. Although Goodson went forward with his plans to launch The Nighttime Price Is Right without a companion program, both he and NBC did not give up on Concentration and a new series was developed.
The new series, which became known as Classic Concentration, debuted on NBC on May 4, 1987. Alex Trebek (who at the same time was also hosting Jeopardy!) hosted and Diana Taylor was the series' prize model. In July of that year, Mark Goodson's daughter, Marjorie Goodson-Cutt, replaced Taylor and remained for the entire series. Gene Wood was the announcer, with Art James substituting for him for several weeks in 1991. The new Concentration ran once again at 10:30 AM EST and remained in that slot for its entire run. Classic Concentration's final new episode aired on September 20, 1991, but reruns continued to air for two more years and ended on December 31, 1993.
This version featured a 25-space computer-generated gameboard, with in-studio contestants viewing on a large-screen TV placed off stage.
Most games had three wild cards, although some games used only one or two. Choosing two wild cards in one turn earned the contestant a $500 bonus, and if a third was chosen in the same turn the bonus doubled to $1,000. In 1989, a second cash bonus was added to the board with the introduction of the "Cashpot", an accumulating jackpot that started at $500 and added $100 for each game it was not claimed. As with the other prizes, cash bonuses could only be won if the contestant solved the rebus. When a wild card match was made, the natural match was also shown, resulting in three puzzle parts being revealed (or more if multiple wild cards were found in one turn). The contestant who correctly solved the puzzle won the game and kept whatever prizes he/she matched to that point.
In the earliest episodes there were no "take one gift" cards on the board. In November 1987, a pair of green slides which read "TAKE!" were added. Upon making a match, the contestant was given a token which could be used to take one of their opponent's prizes. In February 1988, a second set of red TAKE! cards were added, but a contestant had to match like-colored TAKE! cards in order to claim them from the board. Unlike past versions of Concentration, the TAKE! did not have to be used immediately, and a contestant could use the card(s) to claim a desired prize after making another successful match at any time during the round. However, each TAKE! could not be carried over into another round.
In the event time ran short during a game, the puzzle was revealed one square at a time, in numerical order. The first contestant to buzz-in with a correct solution won the game. If incorrect, the contestant was locked out and the rest of the puzzle was revealed for the opponent to receive a free guess. If both contestants were incorrect, either of them could buzz in after Trebek began describing the puzzle, giving clues to the solution of the puzzle until one contestant guessed correctly.
The bonus round, dubbed the "Winner's Circle", was played for one of eight cars that were displayed in the studio. The contestant was shown a board of 15 numbered panels, behind which seven of the eight cars had matching pairs; the eighth was always used as a decoy. Contestants were given a base time of 35 seconds to play the round, with five seconds added for each time the round was not won. If a contestant managed to match all of the cars, the last car he/she matched was the car won. Each time a car was won, the clock was reset to 35 seconds for the next round.
Early in the show's run, a contestant could win the game and play the bonus round up to five times before being retired. Later, champions were only retired after winning a car.
Occasionally, "Five Bonus Car Seconds" was a prize appearing in the main game. Any contestant who solved a rebus and had matched this prize earned five additional seconds in the bonus round.
In the beginning of the run, each match consisted of one game with the winner advancing to the bonus round. A losing contestant left with parting gifts except if their game was interrupted, in which case he/she would return for the first game on the next show.
On July 4, 1988, the format was changed into a best-of-three match, with the first contestant to solve two rebuses winning the match and playing the bonus game. Unlike most game shows that tend to straddle when playing a best-of-three format, Classic Concentration had each match and bonus game fit into one complete show. The first game was split over the first two segments, with the second game taking up the third segment, as well as the third when needed. The bonus round was played during the fourth segment of the show.
From July 2, 1990 onward, the format returned to having the winner of the puzzle play the bonus game. However, contestants could continue to play until losing twice or winning a new car.
If there was time remaining during some shows, an audience member preselected before taping began played the bonus round for up to $500. Instead of the names of cars, dollar amounts of $5, $10, $15, $20, $25, $50, $75, and $100 were hidden behind the 15 numbers. The audience member was given 60 seconds and kept any amounts matched, which accumulated as they went along, or $500 for clearing the board.
Tournament of Champions
Starting in 1989 and continuing annually until the end of first-run episodes, there was a Tournament of Champions. The contestants who won the bonus round in the shortest amount of time were invited back to play for a more upscale car and $10,000. The contestants were grouped into five matches, each consisting of two games.
The first winner of a standard front-game round played the bonus round with the clock counting up from "00" until they made all seven matches. That player's time became the time to beat for any future contestants (e.g., if the first contestant cleared the board in 42 seconds, all future contestants had to complete the round in less time to be eligible to win). From that point forward, the clock counted down from the current time to beat; if a future contestant completed the bonus round within that time, their time became the new time to beat. At the end of the tournament (10 games over five shows), the contestant who completed the bonus round in the shortest time won the grand prize.
The Milton Bradley Company introduced the first commercial version of Concentration in 1958 and subsequently released 24 editions of the game until 1982. Owing to common superstition, these releases were numbered 1–12 and 14–25, skipping 13. It was tied with Password as the most prolific of Milton Bradley's home versions of popular game shows, and was produced well after the Jack Narz era ended in 1978 (albeit without ever including elements from that version).
Pressman Games published two editions of the Classic Concentration home game in 1988. More recently, Endless Games has released two versions of Concentration since 1998. The Endless version were modeled similar to Classic Concentration home game with the rebuses designed by Steve Ryan, who created puzzles for Classic Concentration.
Two computer versions of Classic Concentration were released by Softie for MS-DOS systems, as well as the Apple II and Commodore 64. A Nintendo Entertainment System version was also released by GameTek. Tiger Electronics also marketed a hand-held version of the game in 1999 using the Narz-era theme and the 1960s–1978 logo.
There were also books based on the TV shows. Three issues for the original were released in 1971, written and designed by Norman Blumenthal. Each issue of this collection featured 36 rebus puzzles, 30 standard and six "super puzzles".
In 1991, the book "CLASSIC CONCENTRATION: The Game, The Show, the Puzzles" was written by puzzle designer Steve Ryan (and plugged on the air). This book showcased 152 full color rebuses designed from the Classic Concentration TV show with the first 48 of them simply showing the entire, exposed rebus and the other 104 showing a partially revealed game board, followed on the next page by the entire rebus. The book also showcased a lengthy Concentration history and an introduction by executive producer Mark Goodson.
A video slot machine based on the 1958-1973 version was released for American casinos by Bally Gaming Systems.
In 2007, Reflexive Arcade released a downloadable version of Concentration based on the Classic Concentration format and bonus round with newer puzzles and prizes. In 2008, Glu Mobile released a mobile version of Concentration based on the PC downloadable version, with the look of the original 1958–1973 series.
Several versions aired from 1959 to 1967 (with a nighttime version airing until 1961) with Philip Brady, then in the 1970s with Lionel Williams, and then again in 1997 with Mike Hammond as host. The 1960s version aired on the Nine Network, while the latter versions aired on the Seven Network.
The German version of the show aired on ARD from 1959 to 1960 then later on ARD 2 in 1961 under the title Gewusst-Wo... (Just Know Where...) originally hosted by Guido Baumann followed by Karl-Heinz Bender later on.
Concéntrese aired during the 1970s (from Unicentro shopping centre) and 1980s.
- Concentration episode #1534, taped December 2, 1977.
- TV Guide—September 15–September 21, 1991
- "Shokus Video Online Catalog". Retrieved 29 December 2010.
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