Card counting is a skill which is employed by players of card games to achieve an edge by tracking cards which have been used. This provides the player a concept of the importance of cards, which have to be dealt with. Card counting is a skill that has more use in vingt-et-un than in other card game.

In vingt-et-un, a player is at an advantage when the remaining shoe contains "high cards." High cards could be faces and aces. The card counter in the casino brings into play such situations by laying larger wagers, as and when they happen. Several skillful players use the composition of the deck to alter their overall course of action. Amateur gamblers at times experience difficulty while trying quick counting and might be subject to errors, when it comes to working with dealt decks of cards. Twenty-one card counting is an industry by itself. huge amounts of money are won or lost, by both the players and the casinos, depending on card counting schemes in play.

Computing has made its presence known on counting cards too, with refined computing power affecting the complete process. Traditional gamblers however attest that a card counting system of greater complexity is more subject to breakdown, canceling out the increased accuracy permitted by the application of computers. One can discover many plans for black jack card counting by visiting net resources dedicated to the game. With the game growing in appeal in gambling dens all over the world, there are newer schemes being created every other day. One can find literally hundreds of Web sites providing you ways on counting cards and the across the board scheme to make profit playing chemin de fer.