Counting cards is an ability which is employed by players of card games to realize an opportunity by tracking cards that have been dealt. This gives the player a concept of the value of cards, that need to be dealt with. Card counting is a skill that has more use in chemin de fer than in other card game.

In 21, a gambler is at an advantage when the remaining deck has "high cards." High cards should be tens or aces. The card counter in the gambling den takes advantage of these circumstances by laying greater wagers, as and when they occur. Many adept players use the composition of the deck to alter their overall tactic. Amateur players at times have difficulty while performing quick counting and could be subject to errors, when it comes to dealing with dealt decks of cards. Vingt-et-un card counting is an industry on its own. Millions are won or lost, by both the gamblers and the gambling halls, based on card counting schemes in play.

Technology has made its presence known on counting cards too, with enhanced computing power affecting the entire process. Traditional gamblers will argue that a card counting plan of greater complexity is more prone to blunders, negating the added accuracy allowed by the use of computers. One can locate a lot of plans for vingt-et-un card counting by going internet resources devoted to blackjack. With the game growing in appeal in gambling halls all over the planet, there are better plans being developed every other day. One can discover easily a multitude of internet sites giving you pointers on card counting and the all-around plan to make money playing twenty-one.