A player does not declare "Rummy" until they have formed all of their cards into sets and runs. Planning, strategy, and memory are all necessary for winning at rummy. Players have tind slots all gameo be conscious of the cards they have in their hands as well as the cards that other players have discarded. It is possible to learn a lot about the hands of other players by keeping an eye on the cards that are picked up and discarded. Gamers have to make snap decisions about which cards to keep and which to discard based on a fast appraisal of their value.