21點 ( Black jack ) , 又叫做黑傑克, 一開始21點在美國並不流行, 後來賭場提供各種額外獎金才吸引賭客參與牌局, 而領取這個額外的獎金的條件是當玩家手牌同時擁黑桃A, 黑桃J, 獎金就會變成十倍, 而這樣的牌稱為 “Black jack』, 這個名字才漸漸成為美國版21點的名稱。最早期21點是法國賭場起源的紙牌遊戲, 漸漸流傳於地球村各個角落, 也成為家喻戶曉的紙牌遊戲之一。 21點是 2 名以上玩家玩的遊戲。 總分最高的玩家獲勝。 21點的規則簡單明了，但有很多技巧可以提高勝率： 21點算牌。 如果您想學習基本的21點規則和高級21點，請不要錯過算牌技巧！
The predecessor of blackjack is “vingt-et-un” (meaning 21 in French) which originated in French casinos around 1700. The game at that time did not provide a three-to-two odds for two-card blackjack. Pay dividends.
Blackjack was not popular in the United States at first, so casinos tried to offer various additional bonuses to attract gamblers to participate in the game. One of the additional bonuses is that when the player has both the Ace of Spades and the Black Jack (either Jack of Spades or Jack of Clubs), the bonus will be doubled. Such a card is called “black jack” (blackjack, blackjack), and this name gradually became the name of the American version of the blackjack game. Even after the extra bonus rule was discontinued, the name “black jack” remained continue to exist. With the development of the rules today, “blackjack” no longer necessarily needs to contain J or black cards.（資料來源)
什麼是21點？
21點一次是以4至6副撲克牌進行遊戲，是由諸位玩家與莊家進行撲克牌牌值大小的對賭，點數總和最高為21點，超過21點或者比莊家點數少都算輸。 起源於1700年左右的21點，在法國賭場盛行，日後在美國越來越多人熟知，手牌若是拿到黑桃Ace與黑色的J時可以拿到10倍的獎金，因此又被稱之為「Black Jack」。
21點基本策略
21點是一種有技巧性的遊戲，下面是一些基本策略，可以幫助你在玩21點時提高你的贏率: 1. 當你手中的牌點數小於17時需要牌，因為在這種情況下，你有可能贏而不是爆。 2. 當你手中的牌點數大於等於17且小於21時需停牌，在這種情況下，你有可能贏或者是跟莊家平手，而不是爆。 3. 當你手中有一張A且點數為11時，特别注意.因為在為了不爆而讓A變成1時,你可能輸掉更多的局。 4. 當你手中的牌點數大於11且小於等於17時需要牌，若拿到的牌是10點牌，那麼你的牌點數會高過莊家，也有可能贏。 5. 當莊家公開的牌是4、5或6時，應該要牌，在這種情況下，莊家很可能會爆。 6. 當莊家公開的牌是2、3或7時，應該要停牌，因為在這種情況下，莊家也許會贏。 7. 當莊家公開的牌是A時，應該要牌，因為你有可能贏。
The player with the highest points wins, and his points must be equal to or lower than 21 points; the player with more than 21 points is called bust. Cards with 2 points to 10 points are calculated based on the number of points on the card. J, Q, and K are each worth 10 points. A can be counted as 1 point or 11 points. If the player will bust because of A, A can be counted as 1 point. When an Ace in a hand counts as 11, the hand is called a “soft hand” because there will be no bust unless the player takes another card. The dealer must ask for cards before getting 17 points. Due to different rules, there will be a specific distinction between soft 17 points or hard 17 points before stopping. And if the dealer takes five cards without busting the cards, it is considered a victory for the dealer. （資料來源）
威樂娛樂城結語
21點中必勝的技巧之一是：分牌。 當你手上的牌為10、J、Q、K、A，且數字相同時，你可以使用21點規則中的分牌功能，將你的手牌分成兩組。 分開下注時，結合上面提到的算牌技巧，當兩隻手分開時，牌堆裡多是大牌時，兩組牌同時拿到19點以上的機率就會很大，而且莊家在遊戲結束時沒有大牌剩餘時也容易爆牌，因此您可以將您的21點勝率提高到最高水平。
