Logic Masters Deutschland e.V.

This is my first attempt at a 9x9 sudoku now that I've developed a better understanding of how to design a puzzle and how to control how things interact.
Because I’ve spent a lot of time learning to how constraints behave in 6x6 grids, I’ve decided to play it safe here by embedding an irregular 6x6 puzzle.

Difficulty: intended to be a high 3/5

Rules:

• Place the digits 1 to 9 in the grid such that no digit repeats in any row, column, or box.
• Digits in a cage sum to the value in the top left, and may not repeat.
• Consecutive digits along a green whisper line must differ by at least 5.
• Consecutive digits along a blue whisper line must differ by at least 3. Note: In this case they are all in 6 cell 21-cages so the high/low ranges are always 1,2,3 and 4,5,6.

Online links:
f-puzzles: https://f-puzzles.com/?id=2bolehrc
CTC: https://tinyurl.com/DoggoAdventure7