Triangle

The Triangle is a riddle. It can be played by any number of participants.

Equipment
You don't need any equipment to solve the riddle.

Procedure
A player knowing the solution to the riddle draws "triangles" between the participants:

I draw a triangle from Tom via Anne to Lucas. The triangle belongs to Marie!

All participating players have to find out why the triangle belongs to Marie. Several triangles will have to be drawn until the first player has a clue. Of course, if anybody suspects to know the solution, he must not present this guess, but draw a triangle for himself and thus prove this theory. Are all players able to find the solution?

Solution
It is most fun to solve this riddle by playing and guessing. However, if you need the solution right now, you find it at Triangle/solution.

Dreieck