Players must become familiar with the particular rules and subtleties of the version they decide to play because each one presents different challenges & strategies. A player's performance in Rummy can be greatly imnolimit city slotsproved by mastering the skill of card counting. Knowing which cards have been played can give important information about opponents' hands, even though it might not be as simple as in games like Blackjack where particular cards are tracked for betting advantages. Players can guess what melds their opponents might be attempting to form by keeping track of the cards that have been discarded & those that are drawn from the pile.