Logic Masters Deutschland e.V.

Genus 3

I suspect this puzzle is on the higher end of 4/5 difficulty. I will let the solvers decide since I received mixed opinions on this while testing.

Rules:

Construct nine non-overlapping 3x3 regions in the grid containing digits 1-9 once each.
The rest of the grid must be left empty.
Digits must not repeat along any row or column.

Digits on a grey thermometer must strictly increase from the bulb-end.

The sum of digits along a diagonal indicated by a clue outside the grid must satisfy either the given inequality or the corresponding relationship with other such clues.

Try it on Sudokupad.

Puzzle: