Counting cards is an ability which is employed by players of card games to gain an opportunity by tracking cards that have been played. This gives the gambler an idea of the importance of cards, that need to be dealt with. Card counting is an ability that has more use in chemin de fer than in any other card game.

In vingt-et-un, a player is at an advantage when the remaining deck contains "high cards." High cards should be 10s or aces. The card counter in the gambling den brings into play these circumstances by making greater wagers, as and when they occur. A good many accomplished gamblers use the makeup of the shoe to alter their overall tactic. New gamblers on occasion will have problems while engaged in fast card counting and could be prone to mistakes, when it comes to handling dealt decks of cards. 21 card counting is a business on its own. huge amounts of money are won or spent, both by the players and the casinos, depending on card counting strategies in play.

Technology has made its presence known on card counting too, with improved computing power affecting the complete activity. Old guard players however argue that a card counting system of greater complexity is more subject to error, canceling out the added accuracy enabled by the use of computers. One can find many game plans for vingt-et-un card counting by visiting net sites devoted to the game. With the game increasing in popularity in gambling dens around the world, there are newer techniques being developed every other day. One can dig up easily a multitude of internet sites giving you tips on counting cards and the overall plan to earn money through vingt-et-un.