Counting cards is a skill that is used by players of card games to obtain a benefit by tracking cards which have been used. This provides the gambler a concept of the sum of cards, which need to be dealt with. Counting cards is a technique that is more advantageous in black jack than in any other card game.

In chemin de fer, a player is at an advantage when the remaining shoe has "high cards." Big value cards should be faces and aces. The counter in the gambling hall brings into play these situations by laying greater bets, as and when they happen. Many skillful gamblers use the composition of the shoe to adjust their overall tactic. New gamblers occasionally have problems while trying fast card counting and may be prone to mistakes, when it comes to handling dealt decks of cards. Black jack card counting is an industry on its own. millions and millions are made or lost, both by the players and the gambling halls, based on card counting tactics in use.

Computing has made its impact on card counting too, with improved computing power affecting the entire activity. Long-standing players will swear that a card counting system of greater complexity is more subject to problems, evening out the additional accuracy allowed by the use of computers. Anyone can locate a lot of tactics for black jack card counting by going net resources devoted to the game. With the game increasing in popularity in gambling halls around the globe, there are better tactics being created every other day. One can discover at least a multitude of Web sites providing you pointers on card counting and the all-around tactic to earn cash playing twenty-one.