Counting cards is a technique that is used by players of card games to obtain an advantage by following cards that have been used. This provides the player a theory of the sum of cards, which need to be dealt with. Counting cards is a technique that is more advantageous in 21 than in other card game.

In black jack, a player has an advantage when the remaining deck houses "big value cards." High cards can be 10s or aces. The card counter in the casino brings into play these situations by placing bigger wagers, as and when they happen. Most knowledgeable gamblers use the composition of the shoe to alter their overall tactic. Inexperienced gamblers at times have problems while trying quick card counting and may be prone to errors, when it comes to dealing with dealt decks. Black jack card counting is an enterprise by itself. huge amounts of money are won or spent, by both the players and the gambling dens, depending on card counting techniques in use.

Technology has made its presence known on counting cards too, with improved devices affecting the complete process. Old guard players however swear that a card counting approach of greater complexity is more subject to error, negating the increased accuracy permitted by the application of technology. Anyone can dig up many plans for twenty-one card counting by going internet pages devoted to the game. With the game growing in acceptance in gambling halls around the world, there are newer techniques coming up every other day. You can dig up literally a multitude of net pages providing you tricks on counting cards and the overall scheme to earn cash playing blackjack.