A player cannot empty their hand entirely until their team has a set number of canastas A canasta is a meld containing at least 7 cards.Black Threes can only be melded if the player has only Black Threes in hand If a Black Three is on the top of the discard pile, the pile cannot be picked up.Red Threes are played immediately and score bonus points.Teams score points by creating melds (sets of cards of the same rank).