Blackjack (21) is a card comparison game between one or more players and a dealer, where each player competes against the dealer. Players do not compete with each other. It is played with one or more 52-card decks and is the most widely played casino game in the world. Players are dealt two cards, each face up. The dealer receives two cards, one open and one closed. The value of two to ten cards is the value (2 to 10). Face cards (Jack, Queen, and King) are all worth 10. Aces can be either 1 or 11. The value of a hand is the sum of the card values. Players are allowed to draw additional cards to improve their hands.

After all players have completed their hands, the dealer's card opens. The dealer hand is not completed if all players exceed 21 or make blackjack. The dealer then opens the face down card and draws the cards until a total of 17 is equal to or greater than 21 is equal to or small. The dealer must remain at a score of 17 or higher. You win when you have a better hand than the dealer. The better hand is the hand in which the sum of the card values ​​is close to 21, without exceeding 21. If the player card value is the same as the table, the deposited value is withdrawn.