What is Sudoku?

Sudoku is a logic-based number placement

puzzle.

Its objective is to fill a 9x9 grid so that each

column, each row, and each of the nine 3x3

boxes contains the digits from 1 to 9.

History of Sudoku

Back in the 19th century

Le Siècle, a Paris-based daily newspaper

published a partially completed 9×9 magic

square with 3×3 sub-squares.

There were still some similar characteristics

and within three years, the puzzle was refined

by La France, a rival newspaper, to almost the

Sudoku that we know now.

History of Sudoku

As for this modern Sudoku, it‟s

believed to have been designed

in 1979 by Howard Garns, a

74 year old architect from

Indiana. It was then published

by Dell Magazines in its

magazine Math Puzzles and

Logic Problems, under the title

“Number Place.”

History of Sudoku

The puzzle was introduced in Japan by Nikoli

in the paper Monthly Nikolist in April 1984.

„Suji wa dokushin ni kagiru’

“The numbers must occur once”

The puzzle was named by Kaji Maki.

Sudoku Terminology

Grid – the whole

puzzle area.

Values – also called

“given”

Cells – composed of 91

cells

Blocks/Regions – each

of the 9 3x3 boxes