Spanish 21 with Super 21 bonus and Match the Dealer side bet. dealt an Ace with either a king, queen, or jack the player has blackjack and will win 3:2 odds.
Spanish 21 is a spin-off of blackjack, following the same betting premises, but some Late Surrender: Late Surrender is a rule that increases the player's odds.
Match the Dealer (MD) is a popular side bet offered with six-deck Spanish 21. I have never seen this wager offered on ordinary blackjack.