Rummy is a card game in which two decks of cards are used, each with two Jokers. A player must make a proper declaration by picking and discarding cards from the two piles provided to win the rummy game. The first pile is a closed deck, in which a player cannot see the card he is picking, while the second pile is an open deck made up of the cards discarded by the players. In the rummy card game, players must combine cards into valid sequences and sets in order to win.