Fig. 2
From: Game theory models for communication between agents: a review
This figure is adapted from Morrow (1994)
The boxes represent the player currently playing and the number 1 represents player 1 and number 2 represents player 2. The tree shows that player 1 can show head or tail. Next player 2 has turn who can show head or tail against player 1 options. Finally in parenthesis the payoffs are shown according to each option of players.