Sudoku
CONCEPT
Sudoku is a number puzzle popularized in Japan in 1984, and later worldwide, although its origins stem from similar puzzles in France and the US.


Overview

Sudoku is short for suuji wa dokushin ni kagiru, meaning "the digits must be single". In Japan, Sudoku is a registered trademark, and the generic name for the puzzle is "number place". In the rest of the world, sudoku has become the generic term for all puzzles of this type.