Counting cards is a technique that is employed by players of card games to obtain an advantage by following cards that have been used. This provides the player an idea of the importance of cards, that have to be dealt with. Card counting is a skill that has more use in vingt-et-un than in other card game.

In vingt-et-un, a player is at an advantage when the remaining deck contains "big value cards." High cards could be 10s or aces. The card counter in the gambling hall brings into play such situations by placing bigger bets, as and when they happen. Several skillful gamblers use the makeup of the shoe to adjust their overall strategy. Amateur gamblers sometimes have difficulty while engaged in rapid counting and could be subject to errors, when it comes to handling dealt decks of cards. Vingt-et-un card counting is a business on its own. massive amounts of money are won or lost, both by the players and the gambling halls, based on card counting schemes in use.

Technology has made its presence known on counting cards too, with refined computing power impacting the entire process. Traditional players however vow that a more complex card counting approach is more prone to blunders, negating the increased accuracy allowed by the application of technology. One can discover a lot of techniques for vingt-et-un card counting by going net pages devoted to black jack. With the game increasing in popularity in gambling dens all over the globe, there are newer strategies being developed every other day. One can dig up easily thousands of net pages providing you hints on card counting and the all-around scheme to earn money playing vingt-et-un.