Sudoku is one of the most popular puzzle games of all time. The goal of Sudoku is to fill a 9×9 grid with numbers so that each row, column and 3×3 section contain all of the digits between 1 and 9. As a logic puzzle, Sudoku is also an excellent brain game. If you play Sudoku daily, you will soon start to see improvements in your concentration and overall brain power. Start a game now. Sudoku, Weekend Sudoku, number puzzle, brain game, logic puzzle, concentration, brain power, free online, online Sudoku, 9x9 grid, puzzle game, mental workout, cognitive skills, problem solving, relaxing, brain training, easy to play, mouse interact