From Hollywood, the game of puzzles and prizes...
and here's the host of Concentration...
Jack Narz!
Broadcast History
Airdates: September 10, 1973-September 1978, Syndicated
Host: Jack Narz
Announcer: Johnny Olson
Origination: Metromedia Studios, Los Angeles
Packager: Mark Goodson-Bill Todman Productions
Gameplay
Very similar the
original version.
Two contestants (no returning champions) competed for the entire show. 
To
begin the game, four prizes were revealed ("head starts") and what number they were behind. 
Originally
in the first game, each player would call two numbers, later they changed this
to three.
Like before, a "Wild" card was an automatic match, and the 
"Take
One Gift" card was still up. Matching two Wild 
cards
on this version won a player $250, win or lose. Another special 
card
was the "Free Look" space, which allowed a player to take a look
behind the square and 
take
a guess without having to make a guess. Also like before, matching two prizes or
spaces allowed a player to solve the rebus, and if incorrect, the game continued
as before. Solving the puzzle correctly won the game, all their prizes, and a
chance to play the bonus game.
After the first game, they played a second game. In the second game (same
players), they called out two numbers per turn, and would play until time ran
out. One special space in this round was the "Bonus Number."
If matched, a player could choose three numbers on each turn, until they
made a match. If time was running out, a times up buzzer went off. 
The
puzzle was completely revealed 
and
the first player to ring in with the correct solution won the game and went to
the bonus game.
Double Play
This was the first
version to have a bonus game. 
In
the Double Play game, the player would have to solve two 
revealed puzzles, one at a time, in ten seconds. The first was worth $100, the
second won a brand new car. 
Later,
this was changed to where they played a matching game before to determine what
prize they would play for, and one space allowed to play for all the prizes. 
The
player would choose a number one at a time on a 9 square board, the first prize
to be revealed twice was the prize they played for.
Facts
-Jack Narz for a short time hosted Now You See It at the same time as Concentration. Now You See It aired on CBS in the mornings, and he said in some places he ran against himself (Concentration, while syndicated, was on many NBC O&O's).
-Announcer Johnny Olson of course is the more famous announcer of The Price is Right
-Concentration is the only game show ever produced by Mark Goodson-Bill Todman Productions to not have been created by somebody on their own staff. NBC owned the rights to the show and leased the production rights for this version to Goodson-Todman.
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