Would you like to play Sudoku online? Famous Japan puzzle with great art, 3 difficulty levels, load/save game progress and user friendly interface. Play Sudoku online to fill a 9×9 grid so that each column, each row, and each of the nine 3×3 boxes (also called blocks or regions) contain the digits from 1 to 9 only one time each. The puzzle setter provides a partially completed grid. Sudoku was popularized in 1986 by the Japanese puzzle company Nikoli. Play Sudoku online absolutely for free!