Players in Gin Rummy try to make runs and sets, but they can also "knock" if they think their opponent has more unmatched cards than they do. Players must choose when to knock and take the chance of777 slots real money app showing their hand in this variation, adding another level of strategy. Another well-known variant is "Indian Rummy," which uses two decks of cards & permits more intricate set & run combinations. Jokers can be used as wild cards in Indian rummy, giving the game a thrilling new dimension. Longer rounds with fierce competition can result from this variation, which frequently has more players.