Counting cards is a technique which is used by players of card games to realize an advantage by tracking cards which have been used. This provides the gambler a notion of the value of cards, that need to be dealt with. Card counting is a technique that has more use in blackjack than in any other card game.

In vingt-et-un, a gambler has an advantage when the remaining deck contains "big value cards." Big value cards could be faces and aces. The card counter in the casino uses such situations by placing bigger bets, as and when they happen. Many skillful gamblers use the composition of the shoe to adjust their overall plan. Fairly new gamblers sometimes have problems while trying quick counting and may be prone to mistakes, when it comes to working with dealt decks of cards. Chemin de fer card counting is an enterprise by itself. Millions are made or lost, both by the players and the casinos, based on card counting strategies in play.

Computing has made its presence known on counting cards too, with enhanced computing power affecting the entire process. Long-established players however argue that a more complicated card counting approach is more subject to error, evening out the increased accuracy enabled by the application of computers. One can find a lot of plans for black jack card counting by visiting online pages devoted to the game. With the game increasing in acceptance in gambling dens around the globe, there are better strategies being created every other day. One can find easily a multitude of net sites providing you pointers on card counting and the across the board scheme to earn money through twenty-one.