Counting cards is a technique which is employed by gamblers of card games to achieve an advantage by tracking cards that have been dealt. This gives the player a concept of the sum of cards, that need to be dealt with. Counting cards is a technique that is more beneficial in vingt-et-un than in any other card game.

In black jack, a gambler is at an advantage when the remaining deck has "high cards." High cards could be tens or aces. The card counter in the gambling hall uses these opportunities by making larger bets, as and when they happen. A good many accomplished gamblers use the makeup of the shoe to adjust their overall course of action. Amateur players occasionally will have problems while trying quick counting and could be subject to mistakes, when it comes to dealing with dealt cards. Black jack card counting is an industry by itself. millions and millions are made or spent, by both the gamblers and the casinos, based on card counting methods in use.

Technology has made its impact on counting cards too, with improved devices impacting the entire process. Old guard gamblers however argue that a more complicated card counting plan is more subject to breakdown, canceling out the additional accuracy allowed by the use of technology. Anyone can locate many strategies for twenty-one card counting by going net resources devoted to vingt-et-un. With the game increasing in fame in casinos around the world, there are better schemes coming up every other day. One can dig up literally hundreds of internet pages giving you hints on card counting and the all-around strategy to make cash playing vingt-et-un.