The rules of Havannah are below. Other commands are the same for all pbmserv games. The default size is 10. Note that Havannah only supports games with just two players. You can find more information about Havannah at MindSports Arena .
Players move in turn to place one stone on an empty cell.
White moves first. The game is won by the first player to complete a ring or a bridge or a fork . A ring is a chain around at least one cell. A bridge is a chain linking two corners. A fork is a chain linking three sides.