The players embody merchant-princes of Ys. By skillfully using their network of brokers, they speculate on the purchase of precious stones, thus amassing gold . At each turn, ships filled with gems land in the city's ports. In order to obtain gems, make the market prices rise and be able to draw cards, the players must get majorities on the board by placing brokers in carefully chosen places. Brokers can be displayed either face up or face down, so you can try to bluff your opponents.