Disjoint Sets: No digit may appear in the same position in any two boxes in the grid.
German Whispers: Along the green whisper lines, adjacent digits must differ by at least 5.
Thermometers: Digits along a thermometer must increase starting from the bulb.
f-puzzles: https://f-puzzles.com/?id=yg3n85et
CTC: https://tinyurl.com/xhc37t2j
Solution code: Row 7 + Column 9 (18 digits)