Extreme 21 is a variation of blackjack with some nice and exiting features. However, this type of blackjack offers the triple house edge in comparison with the traditional blackjack.
The players play against the dealer. The dealer doesn’t stand, he continues playing until he wins or busts. This version of blackjack doesn’t have push. The player can double or re-double and re-split, but he can’t re-split the aces.
All hands with 21 total win. These hands as well as blackjack pay 1:1, thereby increasing the house edge.