Counting cards is a skill that is employed by gamblers of card games to achieve a benefit by following cards which have been dealt. This gives the player a concept of the value of cards, that need to be dealt with. Counting cards is an ability that has more use in vingt-et-un than in any other card game.

In vingt-et-un, a player is at an advantage when the remaining shoe houses "big value cards." Big value cards should be faces and aces. The counter in the gambling hall uses these opportunities by placing larger bets, as and when they occur. A great many knowledgeable gamblers use the composition of the deck to adjust their overall plan. New gamblers at times will have difficulty while trying rapid card counting and might be subject to mistakes, when it comes to handling dealt decks of cards. Vingt-et-un card counting is an industry on its own. massive amounts of money are made or spent, both by the gamblers and the casinos, depending on card counting tactics in use.

Computing has made its impact on counting cards too, with refined computing power affecting the entire activity. Old guard gamblers however argue that a more complicated card counting approach is more subject to error, evening out the added accuracy allowed by the application of technology. One can locate many schemes for twenty-one card counting by visiting online resources devoted to the game. With the game growing in acceptance in gambling dens around the planet, there are newer schemes coming up every other day. One can locate at least a multitude of net pages providing you tricks on card counting and the across the board tactic to make cash playing black jack.