Sudoku is one of the most popular puzzle games of all time. The game is to fill a 4x4, 6x6, 9x9 grid with numbers, animals, fruits so that each row, column and 2x2, 3x2, 3x3 section contain all of the digits between 1 and 9, animals, fruits. This is also an excellent brain game. If you play it every day, you will see improvements in their concentration and overall brain power.
This game is 3 categories 4x4, 6x6 and 9x9. In each category, you may be chosen one kind you want to play as number, animals, fruits.