One well-known variation is Gin Rummy, which is usually played in pairs & places an emphasis on fast rounds & calculated moves. In Gin Rummy, players trummy lunchry to minimize deadwood, or unmatched cards that don't count toward their final score, while forming melds. Because it emphasizes skillful play and moves quickly, this variation has become incredibly popular. Indian Rummy is another noteworthy variant that has gained a lot of popularity in South Asia.