According to the mathematicians who have studied the strategy, when you know the game variation, the number of cards used and the specific rules, the possible situations that may occur to a player can be described by computer.

It then becomes feasible to determine which choice would be most beneficial. After calculations, the most optimal choices are displayed in a table comparing the two cards the player with the dealer's card.

For example, if the value of the cards the player is 12 and the dealer's visible card is 7, it is better to take another card. The mastery of this picture improves how to play blackjack without guaranteeing the player to win.

The system of counting cards is also widely used in blackjack. It does not remember all the cards have been played but the technique used is the allocation of points to different cards.

This is the hi-low system that was established for the first time by E. Thorp in 1963 and then revised by J. Braun and S. Wong later. The principle is quite simple, we assign -1 point cards and aces are worth 10, 7, 8 and 9 to 0 points and count the cards below 7 count 1 point.

The player adds up the points cards coming out. In a deck of 52 cards, there are many cards as -1 to 1. If the calculation result is less than 0, so there is more aces and 10 value cards that came out.

The probability of getting As and maps of 10 drawing is then lower. If instead the result is greater than 0, the majority of cards out are those under 7.

After counting cards is the player to calculate the probability in mind that there is a card that gives him advantage if he pulls.

These two strategies of blackjack can be perfectly combined to maximize the chances of winning. But these strategies require a high concentration of the player, a strong aptitude for mental arithmetic and especially the practice.

Unlike other games of chance, blackjack players the choice of whether to add additional maps a lot. The main strategy used is the basic strategy. It was in the 80s that this strategy has been discovered and described scientifically.