Game rules

Preparation: 2 to 6 people, a deck of 52 playing cards, no jokers. Take turns to be the dealer, and agree on a basic penalty of 1 to 3 units for each hand. A can be counted as 1 or 11, J/Q/K can be counted as 10, and the rest are as shown.

The dealer gives each player and himself two cards. The player's cards are face up; the dealer has one up card and one hidden card.
If the dealer's open card is an A or a 10-point card, check the hidden card first. The dealer's first two cards are 21 points and are called BJ: the player without BJ will receive double the basic penalty; if both players have BJ, it will be a tie.
When there is no dealer BJ, players can choose to stop, ask for cards, or split the cards when the first two cards have the same number. Each time a player draws a card or splits a hand, the penalty for that hand increases by one unit.
If a player exceeds 21 points, that hand busts immediately and the player takes the penalty accumulated for that hand. After the cards are split, the two hands are settled separately.
After the player completes, the dealer turns over the hidden cards; the dealer must draw at 16 points or less and stand at 17 points or more.
The player with unexploded cards will compare points with the dealer: the player with the lower score will receive his accumulated units; if the player has the same points, there will be a tie. When the dealer busts his cards, the players still present win; a player’s BJ from their first two cards beats an ordinary 21, and the dealer accepts twice as much.
When a deck of cards is used up or there are not enough cards to open another hand, the player on the left takes over as the dealer and reshuffles the cards.