Blackjack, which is also known as 21, is one of the most widely played casino game in the world. Blackjack can be classified as a card comparing game between a player and the dealer, i.e. the players are playing against the dealer and not against the other players. Blackjack is played with one or more than one decks of 52 cards. The main objective of the game of blackjack is to beat the dealer.