Sudoku is a logic game in which a 9×9 table is divided into nine 3x3 blocks. Each column, each row, and each of the nine blocks contains all of the digits from 1 to 9. Puzzles have a unique solution that can be arrived at using pure logic.
The name sudoku comes from Japan and consists of the Japanese characters Su (meaning number) and Doku (meaning single).
It was not invented in Japan. Swiss mathematician’s game called “Latin Squares” was published in France in 1895. The modern game of sudoku, as we play it today, was invented by Howard Garns in 1979. It was called “Number Place” since it involved placing individual numbers into empty fields on a 9 x 9 grid. The game first appeared in Japan in 1984. under the name “Sudoku”. It comes from “Sūji wa dokushin ni kagiru” which means, “the digits are limited to one occurrence.”