Mahjong is a game that originated in China. It is commonly played by four players (with some three-player variations found in South Korea and Japan). Similar to the Western card game rummy, mahjong is a game of skill, strategy, and calculation and involves a degree of chance.
The game is played with a set of 144 tiles based on Chinese characters and symbols, although some regional variations use a different number of tiles. In most variations, each player begins by receiving 13 tiles. In turn players draw and discard tiles until they complete a legal hand using the 14th drawn tile to form four groups (melds) and a pair (head).