History Of Sudoku - Electronic Puzzles early days 1783 - 1979
The history of soduko (Japanese: sūdoku) begins with the Swiss
mathematician Leonhard Euler who in 1783 invented Latin Squares
- N x N grids which have all numbers from 1 to N appearing
exactly once in each row and column. japan 1984 - current day
The puzzle was introduced in Japan by Nikoli in the paper
Monthly Nikolist in April 1984 as "Sūji wa dokushin ni kagiru
(数字は独身に限る)", which can be translated as "the numbers must be
single" or "the numbers must occur only once" (独身 literally
means "single; celibate; unmarried"). The puzzle was named by
Kaji Maki (鍜治 真起), the president of Nikoli. At a later date, the
name was abbreviated to Sudoku (数独, pronounced sue-do-koo; sū =
number, doku = single); it is a common practice in Japanese to
take only the first kanji of compound words to form a shorter
version. In 1986, Nikoli introduced two innovations which
guaranteed the popularity of the puzzle: the number of givens
was restricted to no more than 30 and