It's called Sudoku in the UK, and Soduko in Japan. What is it? A new fun, entertaining and highly addictive puzzle game that is the mathematical equivalent of crosswords. In Japan, Soduko aka Sudoku popularity is immense, second only to Sudoku among Nikoli 's famed logic-puzzle offerings. The Sudoku craze came to this side of the world when The Guardian in Britain began printing the puzzle under the name Sudoku in September 2005; since then many other British papers have followed suit and now also print daily puzzles, and the craze is growing.
The first Sudoku puzzles where called Soduko and were published in 1966 by Dell Magazines ( they introduced Sudoku puzzles to the world a decade later). Since then Sudoku aka Soduko have been a regular feature in a math & Logic publications in the US. Soduko also appears in Kappa's Game magazine.
Sudoku/Soduko made it to Japan only in 1980, where it was imported by Maki Kaji, president of Nikoli puzzles, who named them Kasan Kurosu - a combination of the Japanese word for "addition" and the Japanese pronunciation of the English word "Sudoku."
6 years after it release Nikoli renamed Kasan Kurosu as Soduko, and released the first Soduko/Sudoku booklet. Since then 22 Sudoku/Soduko booklets followed and static's show that over one million Sudoku booklets have been sold. Sudoku/Soduko Puzzles appear in 100 Japanese magazines and newspapers today, and the Sudoku craze is in second place, right after Sudoku. According to Nikoli, Sudoku/Soduko was the top ranking puzzle till 1992 and only then was Sudoku over taken by Sudoku.
As with Sudoku, the market craze started only after the puzzle was exported back to the West from Japan.
The Sudoku craze started, when the Guardian and The Daily Mail, in response to the Sudoku craze, introduced daily Soduko puzzles as Sudoku in the UK.
Just like Sudoku, Sudoku puzzles are spreading. Sudoku puzzles can now be found in all main stream book and magazines publishing houses. Sudoku books are starting to be wide spread too, as more Sudoku titles are being released. Publishers are assuming that with the Sudoku craze still going strong, there is going to be more then enough interest in Sudoku/Soduko.
Sudokulive was the first site to offer thousands of free online Sudoku puzzles. Sudokulive's puzzles can be found in many books and magazines since it's puzzles are unique and the Sudoku algorithm we built provide only one unique solution to each Sudoku puzzle that can be reached logically.