When to lay down melds and when to keep cards for possible future plays are strategic decisions that players must make. Until one player successfully lays down every latest rummy appcard they have, the game continues. At that point, the other players calculate their points using the cards they still have in their hands. Rating and Risk Control. Players must weigh the danger of holding onto high-point cards against the possibility of forming melds, which adds another level of strategy to this scoring system.