What is the meaning of Sudoku?

A type of pencil puzzle played on a square grid, requiring each of the columns, each of the rows, and each of the subregions (called "boxes" or "regions") to contain the lowest whole numbers up to the dimension of the puzzle, usually 1 to 9, once each. The subregions are rectangular or square except in variants.

sudoku (a type of puzzle game)

sudoku (a type of puzzle game)

sudoku (a type of puzzle game)

sudoku (a type of puzzle game)

sudoku (a type of puzzle game)

sudoku (a type of puzzle game)

sudoku (a type of puzzle game)

sudoku (a type of puzzle game)

sudoku (a type of puzzle game)

sudoku

sudoku (a type of puzzle game)

Source: wiktionary.org