Logic Masters Deutschland e.V.

Porosity (9x9), by pmays123

Normal 9x9 sudoku rules apply.

Box and grid borders divide blue lines into segments with the same sum.

Numbers on blue lines outside the grid are X-sum clues, i.e., they give the sum of the first X digits in the corresponding row or column, where X is the digit closest to the clue. X-sum clues may be any number (not necessarily from 1-9).

A digit in a cell with an arrow is greater than the digit the arrow points to.

Link to Puzzle: SudokuPad

Note: solution check works when no digits are entered outside the grid.

Need an introduction to the logic? Here's a link to a 6x6 puzzle I made with the same ruleset: Water Damage (6x6)

I was inspired to use the idea of lines partially outside the grid from this fun puzzle using renbans by sanabas. If you like my puzzle you'd love that one too.

Thanks for playing, feedback is always appreciated, and I hope you have a good day! :)