Huzzle Cast Square - Difficulty Expert

This puzzle consists of 4 pieces that are combined to form a square.
…Will you be able to take it apart?
What’s more, these pieces have a secret: each time their arrangement is changed when recreating the original shape, the solution changes.
Are you up to the challenge of completely solving the riddle of this square?
The theme of this puzzle is “Orientation.” Created by Finland’s Timonen.