The origin of blackjack can be traced to French 21; however, it is a famous American casino game. In most places, this game is known as 21, because the game aims at making a hand total not more than 21.

In Britain, the term blackjack is used for the game known as crazy eights. However, generally blackjack refers to the game where blackjack rules for decision making like hit, stand, double down, surrender, split, re-split, insurance and surrender comes in to play.

There are other variants of blackjack like the Atlantic City Blackjack, Las Vegas Blackjack, and side betting norms like Perfect Pairs blackjack.

Blackjack is played with a deck that does not have jokers.  The single deck blackjack game is very rare in casinos, because with card counting it is very easy to beat the dealer.  The more number of decks used in the blackjack play the more complicated the card counting and beating the dealer gets to be.

Competitive blackjack software and blackjack charts are available to help the player playing high number of decks in blackjack. You have to ensure that when you are filling the forms in the blackjack software that you are filling in the number of decks correctly to get the recommended move that best suits for hand you hold versus the dealer.

When you play blackjack, you do not play considering just your hand in vacuum.  You check for possibilities to hit the blackjack with your hand total and you verify periodically by guessing over the upcard dealer if your hand is already dead with more chance for the dealer to make the winning.  This is one reason for why the dealers up card are an important data in blackjack strategy software.

The easiest way to play blackjack efficiently is to pull an appropriate blackjack strategy chart and play just as described in the chart in accordance with blackjack rules.