The rules are simple.
Player 1 have to ask something. Example: Can you jump over 2 meters.
Player 2 have to say "yes" or "no" and if he wants he can explain to make a longer answer. Then he asks another question which can be answered with "yes" or "no".
Note: Sometimes the question is neither yes, neither no. Then the player can answer with: maybe, depends, I don't know.