An opponent may be unable to finish their melds if they are holding onto cards from a particular suit, for instance, if they are collecting cards in that suit. Alsotime slots, think about when to make your moves; sometimes it might be better to keep some cards for a few turns instead of throwing them away right away. In Rummy 51, you can greatly improve your chances of winning by creating a thorough plan that incorporates both offensive and defensive play. Rummy 51: Developing Your Drawing Skills.