Canasta's emphasis on cooperation and teamwork among partners distinguishes it from other rummy variations. In addition to thinking about how their moves affect their partner's hand, players must coordinate their strategies to form melds. Also, Canast789 gamea adds special scoring systems that depend on the kinds of melds that are created and whether they are "mixed" (with wild cards) or "natural" (without wild cards). Individual strategy and partnership dynamics interact to produce an interesting experience that pushes players to consider their choices carefully and strengthens team spirit. Players must fulfill contracts, which are particular requirements for each round, before they can leave in Contract Rummy, an exciting twist on traditional rummy.