Card counting is an ability that is used by gamblers of card games to obtain an opportunity by following cards that have been dealt. This gives the player an idea of the sum of cards, that need to be dealt with. Counting cards is a skill that has more use in twenty-one than in other card game.

In blackjack, a gambler is at an advantage when the remaining shoe has "high cards." High cards should be faces or aces. The card counter in the gambling den takes advantage of these circumstances by making larger bets, as and when they happen. Several adept players use the makeup of the shoe to alter their overall strategy. Inexperienced players occasionally experience difficulty while engaged in fast counting and could be prone to errors, when it comes to working with dealt decks of cards. Blackjack card counting is a business on its own. millions and millions are won or spent, by both the players and the gambling dens, depending on card counting tactics in play.

Computing has made its impact on card counting too, with refined computing power impacting the complete activity. Old guard gamblers will argue that a card counting system of greater complexity is more prone to error, canceling out the added accuracy permitted by the use of technology. One can locate a lot of game plans for 21 card counting by visiting internet pages dedicated to the game. With the game increasing in popularity in gambling halls around the world, there are newer game plans being created every other day. One can discover easily hundreds of internet pages giving you hints on counting cards and the overall tactic to earn profit through chemin de fer.