Effective card counting in rummy can be achieved through a variety of methods. Counting the cards that have been thrown away & using that information to determine which cards are still in play is one popular technique. There probably won't be ayonos many cards of a given suit in the deck if, for instance, multiple high-value cards of that suit have been withdrawn. Another method is to record the cards that have been pulled from the deck & utilize this data to predict the probability of drawing particular cards in subsequent draws. Rummy card counting is a skill that takes experience and practice to master. To make strategic decisions, players need to be able to quickly and accurately keep track of which cards have been played.
ra