How are they?
They are small spherical pieces, usually made of stone or glass, one to three centimeters in diameter.
Rules of the game:
Players take turns shooting, each with his marble and trying to get it inside the ford or as close as he can.
What is the ford? The guano is played between 2 and 6 players approximately.
The player who has placed the marble closest to or dipped inside the ford starts throwing first.
You have to shoot against one of the marbles of the opponents.
If he manages to put the opponent’s marble inside the ford, he wins.
When a player misses the roll he loses the turn.