Logic Masters Deutschland e.V.

This is an X-sums sudoku puzzle, but the X-sums aren't shown. Instead, all of the kropki relations between adjacent X-sums are given.

Fill the 9x9 grid with digits from 1 to 9 so that every row, column, and 3x3 box contains each digit exactly once.

Also fill the grey spaces outside the grid with numbers in the range from 1 to 45, so that the number at an end of a row or column is the sum of the first X digits from that direction, where X is the first digit in the row or column from that direction.

A white dot between 2 grey spaces means that the difference between the numbers in those spaces is 1. A black dot means that their quotient is 2. All possible dots between the grey spaces are given. (Dots are not shown within the grid, even if adjacent cells have difference 1 or quotient 2.)

The puzzle is available on Penpa.