I think House edge like Every casino game has a built-in advantage for the casino known as the house edge. This is the percentage of each bet that the casino expects to keep over the long run. The higher the house edge, the more likely it is that the casino will win hands. Also Game rules like The rules of each game can also increase the probability of the casino winning hands. For example, in blackjack, if the dealer hits on a soft 17, it increases the house edge and the probability of the casino winning hands.