Special Event Puzzle Arena

Hey guys, hope you may can help me with this topic.

I tried about 100 times but can‘t succeed in actual Rookie and Expert (Challenge I and II).
But beat Master Challenge in first try!
I don‘t understand it at all.
Thx in advance!
Br
Hawk

Hi there! Welcome to the forum. There’s already a thread for this event right here: Puzzle Arena hints/solutions (8/28/2019 - 9/3/2019)
All the answers have been spelled out here. Just post any additional questions you have in this thread. For future reference, if you have something you want to ask about, try looking through the recent forum posts to see if there’s already a thread for it before posting your own. We just want to avoid clutter and redundancy is all. Hope you understand.