Statistics compiled by mathematicians and blackjack experts indicate that a player is likely to win a blackjack hand 48% of the time, but the dealer typically has an edge over the players. Some versions of online blackjack declare a player an automatic winner if he or she has managed to draw 6 casino card gameswithout exceeding 21. Counting cards is not permitted at many live casinos; however there are no rules against card counting when playing jeux blackjack online. Each deck of cards has four 10s, four Kings, four Queens and four Jacks, and each of these cards has a value of 10. Blackjack is typically played with six decks; therefore, a player attempting played online to count cards would need to know that there would be a total of 96 cards with a value of 10. Counting cards requires an excellent memory and superior concentration skills in order for a player to remember what has been already played as well as what cards are still left in the deck.