Japanese Mahjong Japanese Mahjong Japanese Mahjong (Japanese: 麻雀, 麻将 or マージャン; "mājan"), also known as Rīchi Mahjong, is a variation of mahjong. While the basic rules to the game are retained, the variation features a unique set of rules such as "rīchi" and the use of "dora". The main mahjong article contains general terms, but only English and Japanese terms are used here. Terms like "chow," "pung," and "kong" are not used in this variation, yet their functions are still used. Instead, they are referred to in Japanese as "chī", "pon", and "kan". In 1924, a soldier named Saburo Hirayama brought the
Chow variety Chow variety In mathematics, and more particularly in the field of algebraic geometry, Chow coordinates are a generalization of Plücker coordinates, applying to "m"-dimensional algebraic varieties of degree "d" in formula_1, that is, "n"-dimensional projective space. They are named for Wei-Liang Chow. A Chow variety is a variety whose points correspond to all cycles of a given projective space of given dimension and degree. To define the Chow coordinates, take the intersection of an algebraic variety "Z" of degree "d" and dimension "m" by linear subspaces "U" of codimension "m". When "U" is in general position, the intersection will be