Rummy started to change dramatically as it became more popular in the 20th century, giving rise to a number of contemporary variations that accommodate a range of tastes & playing styles. The invention of "Gin Rummy" in the 1910s was one significant change; it simplislots guru gamefied gameplay by enabling players to knock and end rounds when they believed they had a strong enough hand. By emphasizing skill and strategy over luck, this version expanded the game's appeal & cemented rummy's status in American society. But the development didn't end there; variants like "Indian Rummy" appeared, bringing special rules & gameplay elements that represent cultural tastes. In Indian Rummy, players must create at least two sequences using two decks of cards, one of which must be a pure sequence devoid of jokers.