This decision-making process is important because it affects not only their own hand but also the likelihood that their opponents will form combinations that are valid. A player can lay down all store apptheir cards on the table to declare their hand once they think they have formed legitimate sets or runs. When a player successfully melds every card in their deck or the draw pile runs out, the game is over. Although scoring varies depending on the variation, it usually entails figuring out how many points are awarded based on the number of unmelded cards that players still hold.