When you discard a card that seems to be part of a possible meld, for example, your opponents might think you are aiming for that meld & modify their strategiefree ultimate rummys accordingly. Holding onto some cards for longer than necessary is another sophisticated tactic used to generate false leads. This will help your opponents become confused about your goals. The psychological element of rummy gives the game another level of complexity, which competent players can take advantage of.