Pentalpha

Pentalpha is a puzzle where the goal is to place nine stones on the ten intersections of a pentagram. The following rules need to be obeyed when placing the stones:

1. The stone has to visit two other points before reaching its final point.
2. These three points have to be next to each other.
3. The points have to be in a straight line.
4. The first and third (final) points are not allowed to be occupied, the second point is.