The rules:
- Standard sudoko rules applies. Fill the grid with numbers from 1 to 9 so each digit occurs exactly once in every row, column and 3x3 box.
- The numbers outside the grid indicate the sum of the first one or several digits straight in that direction. (A bit like straight killer cages from the edge.)
f-puzzles
Solution code: column 3 and 5 (18 digits)