Humm... I didn't get stuck - first I ended up in row 22 with two options for the five. But then I started in the middle of the left border, worked down and could exclude the left option.
As JoergWausW said, it's actually "logic" where the 5 at row 22 start when you get at a certain point and look at what the result would be if you'd put it further on the left.. Still, I first had to use FortunaDrakens clue to make it because I was stuck before that and noticed later that I made a mistake somewhere, so thanks to you both :) (and Sparrow for the Hanjie)
Hint if you're stuck where I was. The five in row 22 starts at column 18.
Still, I first had to use FortunaDrakens clue to make it because I was stuck before that and noticed later that I made a mistake somewhere, so thanks to you both :) (and Sparrow for the Hanjie)