def isRightNum(all_list, x, y): for i in range(9): if all_list[x][i] == all_list[x][y] and i != y: return False if all_list[i][y] == all_list[x][y] and i != x: return False m, n = 3 * (x // 3), 3 * (y // 3) for i in range(3): for j in range(3): if all_list[m+i][n+j] == all_list[x][y] and ((m+i) != x...