Counting cards is a technique that is used by players of card games to obtain a benefit by following cards that have been used. This gives the gambler a concept of the sum of cards, that have to be dealt with. Counting cards is an ability that has more use in vingt-et-un than in other card game.

In 21, a player has an advantage when the remaining shoe contains "high cards." Big value cards should be faces and aces. The counter in the gambling den brings into play such opportunities by making greater bets, as and when they occur. Most experienced players use the composition of the shoe to adjust their overall plan. Inexperienced players on occasion will have difficulty while trying rapid counting and could be subject to mistakes, when it comes to dealing with dealt decks of cards. 21 card counting is an industry by itself. millions and millions are won or spent, both by the players and the gambling dens, depending on card counting methods in use.

Computing has made its presence known on counting cards too, with improved computing power impacting the complete process. Traditional players however vow that a card counting scheme of greater complexity is more subject to error, evening out the added accuracy enabled by the application of technology. One can find a lot of schemes for 21 card counting by going internet pages committed to 21. With the game growing in fame in casinos all over the planet, there are newer tactics being created every other day. One can discover literally hundreds of net sites giving you pointers on card counting and the overall scheme to earn profit through 21.