Sudoku is played on a grid of 9 x 9 spaces. Within the rows and columns are 9 “squares” (made up of 3 x 3 spaces). Each row, column and square (9 spaces each) needs to be filled out with the numbers 1-9, without repeating any numbers within the row, column or square. LofGames made a very easy user interface and many more feature for you to enjoy the classical SUDOKU game. Sudoku, classic Sudoku, play Sudoku, mobile Sudoku, HTML5 Sudoku, number puzzle, logic puzzle, brain teaser, educational game, number game, puzzle game, LofGames, online Sudoku, easy Sudoku, addictive puzzle, cognitive training, stress relief, concentration