Casinos employ a variety of countermeasures to detect and thwart skilled blackjack advantage players. One common technique is surveillance. Casinos have cameras all over the casino floor and can track the movements of players and dealers. They can also use facial recognition technology to identify known advantage players and bar them from entering the casino.
Another technique that casinos use is to change the rules of the game. For example, they may limit the number of decks used in the game or restrict the betting limits. They may also change the rules for splitting and doubling down, which can make it more difficult for advantage players to profit.
Another technique that casinos use is to change the rules of the game. For example, they may limit the number of decks used in the game or restrict the betting limits. They may also change the rules for splitting and doubling down, which can make it more difficult for advantage players to profit.