Blackjack, also known as Twenty-one or Vingt-et-un : "twenty-one"), is the most widely played banking game in the world.[backjack is
a comparing card game between a player and dealer and played with one or more French decks of 52 cards.
a lesser hand than the player or by exceeding 21. Many rule variations of blackjack exist. Since the 1960s, blackjack has been a high profile target of advantage players, particularly card countershttp://martingaleblackjack.com, who track the profile of cards yet to be dealt, and adapt their wager and playing strategy accordingly.