The game consists of a 9x9 grid divided into 9 smaller 3x3 grids. At the beginning of the game, some of the squares are already filled with numbers. The player's objective is to use the given numbers to logically deduce and fill in the remaining empty squares, ensuring that each row, column, and smaller grid contains all the numbers from 1 to 9 without any repetition.
Shaanxi Haofan Technology Co., Ltd.
1307-E265, 13th Floor, Wisdom International Building, 599 West Chang'an Street,
Chang'an District, Xi'an City, Shaanxi Province.