Normal Sudoku rules apply.
Assign each cell in a box an index number, starting from the top and going left to right, 1-9.
The arrow cell digit is the distance to the target cell.
The arrow cell index number is equal to the target cell digit.
Not all arrows are given.
Solution code: Column 4, 5
on 19. December 2020, 13:17 by tzael
thanks for the nice comments :)
on 19. December 2020, 11:30 by stephane.bura
So many neat tricks stem from this ruleset. Bravo!
on 19. December 2020, 02:48 by SudokuExplorer
Really enjoyable ruleset, thanks tzael :-)