For example, if an opponent is regularly selecting cards from the discard pile, it can be a sign that they are about to form a meld. In these situations, it could be prudent to switch strategies and concentrate on defensive play by eall store appliminating cards that aren't as likely to help them. A player's chances of winning can be greatly increased by knowing how to use the fundamental 777 Rummy mechanic of melting. Understanding how to efficiently form these combinations is essential because a meld is made up of either a set or a sequence. Sequences are made up of three or more consecutive cards of the same suit, whereas sets are made up of three or four cards of the same rank but different suits.