How the game works
Blackjack, also known as twenty-one, is a card game in which each player tries to beat the dealer’s hand without going over 21. A game can use one or more standard 52-card decks. The outcome depends on the cards dealt and the decisions made during the round.
Number cards are worth their face value; jacks, queens, and kings are worth 10. An ace can count as either 1 or 11, depending on which value helps the hand without taking it over 21. A hand that exceeds 21 busts and loses. Otherwise, a hand wins by totaling more than the dealer’s without exceeding 21.
Player choices and a natural blackjack
Under common rules, a player can hit to take another card, stand on the current hand, double the bet for one more card, or split a pair into two hands. The dealer follows fixed table rules, rather than freely choosing among the same strategic options. Specific rules—including when the dealer must stop drawing—can vary.
An ace paired with a 10-value card is a natural blackjack, the highest-value initial hand. The available sources describe different payouts for this result, including 3:2 and 6:5, so players should not assume a particular payout without checking the table rules. If both the player and dealer have blackjack, the result may be a tie under the applicable rules.
Background and a catalogue example
The game is associated with the older twenty-one tradition and European card games. An early seventeenth-century Spanish literary reference describes a game called veintiuna; later, twenty-one gained a following in French casinos. Accounts of the precise origin of the modern name blackjack differ, so it should not be treated as a definitive explanation of the game’s rules.
Bettbit’s indexed public catalogue includes Blackjack. Card values, player decisions, and payouts depend on the variant and table rules.