Logic Masters Deutschland e.V.

This is the second puzzle in a series of 3. Solving the first one is not required, but can of course be fun! https://logic-masters.de/Raetselportal/Raetsel/zeigen.php?id=000JMW
This one is supposed to be a bit more tricky, but not crazy difficult.

Normal sudoku rules apply. Don't make any guesses; only fill in numbers you can logically deduce. Eventually, you will be left with some ambiguous cells that could contain multiple numbers. Shading these cells will reveal an image! I recommend shading all the ambiguous cells in the first 5 columns blue, and the last 4 columns pink :)

(Click the image to open in SudokuPad)

Or go to https://sudokupad.app/2ezzveuex3

On the first puzzle, I got some comments asking for help calculating the solution code. To make it more clear how the Ambidoku rules work, and how to calculate the solution code, I made a small example: https://tinyurl.com/2t4cf55f I hope it is more clear this way! I have only just started uploading puzzles, so any feedback is very much appreciated

When you are done solving the puzzle, save your solution because a secret is hidden across the 3 puzzles in this series.

Hint: If you want to know how many cells are supposed to be ambiguous: After completing the puzzle there should be (531/9)-22 ambiguous cells left