betting software

Card counting is a card game strategy used to determine when a player has a probability advantage. The term is used almost exclusively to refer to the tracking of the ratio of high cards to low cards in blackjack and its derivatives such as Spanish 21,[1] although it is sometimes used to refer to obtaining a count of the distribution or remaining high cards in trick-taking games, such as contract bridge or spades. This article deals only with card counting as it applies to blackjack and its derivatives.
The idea behind counting cards in blackjack is that a deck of cards with a high proportion of high cards (ten-valued cards and aces) to low cards is good for the player, while the reverse (a deck with a high proportion of low cards to high cards) is good for the dealer. A deck rich in tens and aces improves the player's odds because blackjacks (which offer a higher payout than other winning hands) become more common, the dealer is more likely to bust a stiff hand, and double-downs are more successful.[2]
Contrary to the popular myth, card counters do not need savant qualities in order to count cards, because they are not tracking and memorizing specific cards. Instead, card counters assign a heuristic point score to each card they see and then track only the total score. (This score is called the count.)[3] This myth was portrayed in the movie Rain Man, where the savant character Raymond Babbit counts through six decks with ease and a casino employee comments that it is impossible to count six decks. In the movie 21, however, card counting is portrayed as a very intelligent task which can only be undertaken by high-IQ top level students.
Basic card counting assigns a positive, negative, or null value to each card. As each card is dealt, the running count is adjusted by each card's assigned value. There are multiple card-counting systems in use, but a plus-minus count — such as the Hi-Lo system proposed by Harvey Dubner in 1963[4] and later refined by Julian Braun and Stanford Wong[5] — is one of the more basic and illustrative systems.
In the Hi-Lo system, the cards 2 through 6 are assigned a value of +1. Tens (and face cards) through aces are assigned a value of -1. Cards 7, 8, and 9 have a value of zero, or are called neutral (so they can be ignored).
The Hi-Lo system is an example of a balanced card-counting system. This means that there are an equal number of +1 and -1 cards in the deck, so a count of all 52 cards would result in an end count of 0More advanced counting systemsThe High-Low system is considered a single-level or level-one count, because the count never increases or decreases by more than one. A multilevel count, such as Zen Count or Wong Halves, makes finer distinctions between card values to gain greater play accuracy. Rather than all cards having a value of +1, 0, or −1, an advanced count might also include card ranks that are counted as +2 or −2. Advanced players might additionally maintain a side count of specific cards, such as a side count of aces, to deal with situations where the best count for betting accuracy differs from the best count for playing accuracy.
Many side count techniques exist including special-purpose counts used when attacking games with nonstandard profitable-play options such as an over/under side bet
The disadvantage of higher-level counts is that keeping track of more information can detract from the ability to play quickly and accurately. A card-counter might earn more money by playing a simple count quickly—more hands per hour played—than by playing a complex count slowly.