The Sudoku game consists of numbers 1-9, a total of 81 numbers, and a square chessboard. The 9x9 grid (3 rows x 3 columns) is a square shape, and each grid is divided into a 3x3 sub-grid. In each small 3x3 sub-grid, fill in the numbers 1-9 (anywhere) to make the entire large 9x9 grid. Each row should be filled with numbers 1-9 (anywhere). The numbers in each row, column, and diagonal should not repeat, and each game has only one solution.