Counting cards is a skill that is used by gamblers of card games to gain an advantage by tracking cards that have been dealt. This gives the player a concept of the value of cards, which have to be dealt with. Counting cards is an ability that has more use in twenty-one than in other card game.

In 21, a gambler has an advantage when the remaining shoe has "big value cards." Big value cards should be faces and aces. The card counter in the gambling hall takes advantage of these situations by placing larger wagers, as and when they occur. Many knowledgeable players use the composition of the shoe to adjust their overall strategy. New gamblers occasionally will have problems while engaged in rapid counting and might be prone to mistakes, when it comes to dealing with dealt decks of cards. Black jack card counting is an enterprise on its own. millions and millions are made or spent, both by the gamblers and the gambling halls, depending on card counting techniques in play.

Computing has made its impact on counting cards too, with refined devices affecting the complete activity. Long-standing players will argue that a more complicated card counting approach is more prone to problems, negating the added accuracy enabled by the use of computers. Anyone can dig up a lot of tactics for 21 card counting by going net resources dedicated to blackjack. With the game increasing in popularity in gambling halls around the world, there are newer plans coming up every other day. One can dig up at least hundreds of Web sites sharing with you hints on counting cards and the overall scheme to earn cash playing chemin de fer.