Here a crossover between last number and sum search sudoku.

Fill in the grid so that every row, every column, and every 3 x 3 box contains the digits 1 through 9.

A red arrow means that the digits are going up till they hit this number and for a cyan arrow

they go down till they hit this particular number.

For example:

135247896 could get a red arrow with a 5 or a cyan arrow with a 1.

932415678 could get a red arrow with a 9 or a cyan arrow with a 2.

The sums of the digits within each sub-region are equal to each other. In sub-regions there can't be the same digit repeated.