Card counting is based on statistical evidence that high cards (aces, 10s, and 9s) benefit the player, while low cards, (2s, 3s, 4s, 5s, 6s, and … See more

The running count is the running total of each card's assigned value. When using a balanced count (such as the Hi-Lo system), the running count is converted into a "true count", which takes into consideration the number of decks used. With Hi-Lo, the true … See more

A mathematical principle called the Kelly criterion indicates that bet increases should be proportional to the player's advantage. In practice, this means that the higher the count, the more a player should bet to take advantage of the player's edge. Using this principle, a … See more

Detection
Monitoring player behavior to assist with detecting the card counters falls into the hands of the on-floor casino personnel ("pit bosses") … See more

Back-counting, or "Wonging", consists of standing behind a blackjack table and counting the cards as they are dealt. Stanford Wong first proposed the idea of back-counting, … See more

Historically, blackjack played with a perfect basic strategy offered a house edge of less than 0.5%. As more casinos have switched games to … See more

Card counting is not illegal under British law, nor is it under federal, state, or local laws in the United States provided that no external card … See more