There are two options in terms of surrendering your hand. What is surrender in blackjack? This is a strategy in which the player may fold the hand risking only half of the bet rather than the entire amount.
15: House edge using total-dependent vs.13: Probabilities in the first four cards.11: Value and strategy for 678 and 777 bonuses.9: Composition-dependent expected returns for 1 to 8 decks.5: Infinite deck expected return by player hand and dealer upcard.