Countermeasures against blackjack card-counters

Counting cards in blackjack has become substantially more difficult as a result of casino countermeasures. The most common is the use of more decks, which decreases the player’s advantage, but even in the few remaining single- and double-deck games, dealers will often shuffle prematurely or unusually frequently to defeat a suspected card-counter. However, for the casinos there is a downside to frequent shuffling: It reduces the amount of time that the noncounting players are playing and consequently losing money to the house. It has become common for casinos to use automatic shuffling machines to compensate for this. Some models of shuffling machines shuffle one set of cards while another is in play. Others, known as Continuous Shuffle Machines (CSMs) allow the dealer to simply return used cards to a single shoe to allow playing with no interruption. Because CSMs essentially force minimal penetration, they remove almost all possible advantage of traditional counting techniques. As a result, some blackjack players call for a boycott of tables using CSMs. In the case of online casinos, the deck is shuffled at the start of each new round, ensuring the house always has the advantage. However, some online casinos periodically animate the dealer shuffling the cards to give the illusion that the cards are shuffled infrequently. Unfavorable rules can cut into a player’s advantage, such as no double down after splitting, and having the dealer hit a soft 17 (ace, six which can play as 7 or 17.) Starting around 2004 a number of casinos began offering a 6:5 […]