Considered the most basic Mafia setup, C9 is a game for seven players, and is one of the most popular Mafiabot games. C9 is the most common newbie setup, as it leads to fairly quick games and contains very basic roles.
The total number of players always equals seven.
There is a 50% chance of a Cop being included in the game, and a 50% chance of a Doctor being included in the game. Players are not aware as to whether there is a Cop, a Doctor, one of each, or neither of them.