This puzzle is dedicated to my colleagues once again.
Special thank you to Audray for your help and support during the design :)
Normal Sudoku rules apply
Green German Whisper: digits directly connected by a green line have a difference of at least 5
Blue Region Sum: alone a blue line, each connected group of cells in a box have the same sum
Yellow Entropy Line: along the yellow line, each set of 3 adjacent digits must contain one small digit (1, 2 or 3), one medium digit (4, 5 or 6) and one big digit (7, 8 or 9)
For multi-color lines, each color applies.
Solution code: Row 9 followed by column 9 (18 digits)