Mahjong involves skill, strategy, and calculation, as well as a certain degree of luck (depending on the variation played, luck can be anything from a minor to a dominant factor in winning). In Asia, mahjong is also popularly played as a gambling game. In the game, each player is dealt either thirteen or sixteen tiles in a hand, depending on the variation being played. On their turn, players draw a tile and discard one, with the goal of making four or five melds (also depending on the variation) and one pair, or "head". Winning comes "on the draw" by drawing a new or discarded tile that completes the hand. Thus, a winning hand actually contains fourteen (or seventeen) tiles.