A major advantage in the game can be gained by players who lay down sets and runs early because it prevents other players from building on their own sets and runs. There are a few variationssattaking.up of Master Yono Rummy that offer players additional challenges & new elements, even though the game adheres to a set of standard rules. Players can choose to "knock" during their turn rather than drawing a card in one well-liked variation of the game called "Knock Rummy.". A knock indicates that a player thinks they have formed all of their sets and runs & is prepared to play.