Monitoring the cards your opponent picks up and discards is one of the most important Gin Rummy strategies. This data can give you important information about the makeup of their hand and assist you in decidteen pattuing which cards to keep and which to discard. In addition, players have the option to "knock" when they think they have created legitimate melds with unmatched cards that total 10 points or less. An opponent has one last chance to lay off any unmatched cards onto existing melds before revealing their hand if a player knocks. In addition to creating melds, winning at Gin Rummy demands skillful hand management.