Counting cards is a skill which is employed by players of card games to achieve an edge by tracking cards that have been played. This gives the gambler a theory of the sum of cards, which have to be dealt with. Card counting is an ability that has more use in vingt-et-un than in other card game.

In black jack, a gambler has an advantage when the remaining shoe holds "high cards." Big value cards can be tens or aces. The counter in the gambling den brings into play these opportunities by making larger wagers, as and when they happen. Many skillful players use the makeup of the deck to change their overall tactic. Inexperienced players occasionally have problems while trying quick counting and might be subject to errors, when it comes to working with dealt cards. 21 card counting is an enterprise by itself. Millions are won or lost, by both the gamblers and the gambling halls, depending on card counting techniques in play.

Technology has made its impact on counting cards too, with refined devices impacting the complete process. Traditional players will argue that a card counting system of greater complexity is more subject to problems, canceling out the added accuracy enabled by the application of computers. Anyone can discover a lot of strategies for 21 card counting by going web sites dedicated to blackjack. With the game growing in popularity in casinos all over the world, there are better plans being developed every other day. One can locate beyond a doubt thousands of internet pages giving you tricks on card counting and the all-around plan to make money through black jack.