Jiugongge, also known as Sudoku, is a logical digital puzzle game, which is not only very interesting, but also very good for the brain. Children often play Jiugongge, which can exercise their brains and improve their logical thinking ability and intelligence. Old people often play Sudoku, which can make their brains excited and beneficial to health. Jiugongge is also a good parent-child game. Many times, parents can play with their children.