By doing so, players can learn a great deal about their tactics and possible card combinations. Players can make wise decisions about which cards to keep & which to discard, as well as rummymarsmodify their strategy, by closely observing the moves made by their rivals. Being able to closely observe the cards that opponents are picking up and discarding is a crucial part of observing them in a game of rummy. This may reveal important details about the kinds of combinations they are attempting to make and the cards they are giving priority to in their hands.