It is played by four players, two against two, in fixed partnerships; you sit opposite your partner. An Italian 40-card deck is used. The cards have point values for capturing, and a separate set of point values that are only used in scoring the "Prime."
A turn consists of playing one card face up to the table, which may capture one or more table cards. In the event of a capture, both the played card and the captured cards are taken and stored face down in front of one of the members of the team that made the capture, like a trick. If there is no capture, the played card remains face up on the table.
In either case the turn then passes to the next player. You can select between three decks, one of them being a standard card deck.