A trick-taking game is a card or tile-based game in which play of a "hand" centers on a series of finite rounds or units of play, called "tricks", which are each evaluated to determine a winner or "taker" of that trick. The object of such games then may be closely tied to the number of tricks taken, as in plain-trick games such as Whist, contract bridge and Spades, or to the value of the cards contained in taken tricks, as in point-trick games such as Pinochle, the Tarot family, Briscola, and most evasion games like Hearts. Trick-and-draw games are trick-taking games in which the players can fill up their hands after each trick. In most variants, players are free to play any card into a trick in the first phase of the game, but must "follow suit" as soon as the stock is depleted. Trick-avoidance games like Reversis or Polignac are those in which the aim is to avoid taking some or all tricks.