Counting cards is a technique that is employed by gamblers of card games to achieve an advantage by following cards that have been used. This gives the player an idea of the sum of cards, that have to be dealt with. Counting cards is an ability that is more useful in 21 than in other card game.

In vingt-et-un, a player is at an advantage when the remaining deck has "big value cards." High cards can be faces or aces. The counter in the gambling den takes advantage of such situations by making larger wagers, as and when they happen. Most knowledgeable players use the composition of the shoe to change their overall strategy. Amateur players at times experience problems while trying rapid card counting and might be subject to mistakes, when it comes to dealing with dealt decks. Vingt-et-un card counting is a business by itself. millions and millions are won or squandered, both by the players and the casinos, based on card counting tactics in play.

Technology has made its presence known on counting cards too, with enhanced computing power impacting the entire process. Old guard players will attest that a card counting plan of greater complexity is more prone to breakdown, evening out the increased accuracy permitted by the application of computers. One can find a lot of schemes for black jack card counting by going internet resources committed to twenty-one. With the game increasing in popularity in gambling dens around the world, there are better game plans being created every other day. One can dig up at least a multitude of net pages giving you ways on counting cards and the overall strategy to make money playing chemin de fer.