21点一般用到1-8副牌。庄家给每个玩家发两张牌，牌面朝上；给自己发两张牌，一张牌面朝上(叫明牌)，一张牌面朝下(叫暗牌)。大家手中扑克点数的计算是：K、Q、J 和 10 牌都算作 10 点。 A 牌既可算作1 点也可算作11 点，由玩家自己决定。其余所有2 至9 牌均按其原面值计算。首先玩家开始要牌，如果玩家拿到的前两张牌是一张 A 和一张10点牌，就拥有黑杰克 (Blackjack)；此时，如果庄家没有黑杰克，玩家就能赢得2倍的赌金（1赔2）。没有黑杰克的玩家可以继续拿牌，可以随意要多少张。目的是尽量往21点靠，靠得越近越好，最好就是21点了。在要牌的过程中，如果所有的牌加起来超过21点，玩家就输了——叫爆掉(Bust)，游戏也就结束了。假如玩家没爆掉，又决定不再要牌了，这时庄家就把他的那张暗牌打开来。庄家根据自己的情况拿牌，一般到17点或17点以上不再拿牌，但也有可能15到16点甚至12到13点就不再拿牌或者18到19点继续拿牌。假如庄家爆掉了，那他就输了。假如他没爆掉，那么你就与他比点数大小，大为赢。一样的点数为平手，你可以把你的赌注拿回来。-21:00 General used the cards 1-8. The dealer to each player two cards, dealt face up　to their own two cards issued, a card face up (called the winning numbers), a card face down (called the dark card). We calculated the hands of poker points: K, Q, J, and 10 cards are counted as 10 points. A card can count as 1 point can also be counted as 11 points by the players to decide. All the remaining 2 to 9 licenses according to its original par value. First, players began to license, if the player got the first two cards is a A and a 10-point card to a black Jack (Blackjack)　this point, if the dealer does not Black Jack, the player will win 2 times Sweepstakes (1 lost 2). Black Jack, the player can not continue to take the card, feel free to how many. Our objective is to rely on to 21:00, close together as possible, the best is 21 o clock. To license the process, if all the cards add up to more than 21 points, players lose- call ringing off the hook (Bust), the game is over. If the players