Objective: The starting point (start position) of this puzzle is where the large square with the red color dot is outside the other 4 pieces.
What you need to do is to find the right moves to bring this piece to be in the center (inside) of the other pieces.
You must slide the pieces laying inside the wooden frame (you are not allowed to pick them up).
When this task is accomplished, find the right combination to bring it back to its original (outside) position.
There is only one rule: Move the pieces by sliding them without raising them off the board.