Ten and a half is a card game with rules very similar to blackjack. The game is popular in China and is usually used for gambling.
Rules
The rules are very similar to blackjack, with the following exceptions:

A, 2, 3, 4, 5, 6, 7, 8, 9 and 10 are worth their face points. J, Q and [...]

Spanish 21 is an increasingly popular variant of blackjack owned by Masque Publishing, Inc. “Unlicensed” (but equivalent) versions may be called Spanish blackjack.Spanish 21 uses the following rules:

The game is played with six or eight decks dealt from a shoe. Each deck is a standard poker deck with the tens (but not [...]

Seven Twenty-Seven is a vying game similar in some respects to poker, and often played as a “dealer’s choice” variant at home poker games. It uses the same equipment and betting system, but the value of hands does not use traditional poker hand rankings, either high or low. Rather, only the sum [...]

MindPlay is a technology designed to monitor blackjack players’ actions while playing in a casino.Monitoring a person’s play traditionally is done visually, by the dealer, floorperson, pitboss, and the eye in the sky (video surveillance). If one of these observers notices something unusual in a person’s play, they will do what they [...]

The Kelly Criterion or as it is sometimes referred to as the Kelly formula is a formula used to maximize the long-term growth rate of repeated plays of a given gamble that has positive expected value. The formula specifies the percentage of the current bankroll to be bet at each iteration of [...]

Double Exposure Blackjack is a variant of blackjack in which both the dealer’s cards are revealed to players at the start of the hand. Knowing the dealer’s hand provides significant information, and without rules modifications would be advantageous to the player.The main rules changes to provide the casino with the advantage are [...]

Double Attack Blackjack has very liberal blackjack rules and the option of increasing one’s wager after seeing the dealer’s up card. This game is dealt from a Spanish shoe, and blackjacks pay only even money.

Chinese Blackjack is also known as 21-point, ban-nag (Cantonese) or ban-luck (Hokkien). It is a gambling game played in South East Asia which bears similarity to conventional Blackjack.The game uses one or two 52-card deck(s), playable by any number of players. One of them is to be a dealer, or they may [...]

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 [...]

American mathematician Dr. Edward O. Thorp is considered the father of card counting. His 1962 book Beat the Dealer (ISBN 0394703103) outlined various betting and playing strategies for optimal blackjack play. Although mathematically sound, some of the techniques described no longer apply as casinos took counter-measures (such as no longer dealing [...]

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, although theoretically card counting can be used in some other card games.
How card [...]

Basic strategy
As in all casino games, the house has a statistical advantage over the players that will play itself out in the long run. But because blackjack, unlike other games, has an element of player choice, players can actually reduce the casino advantage to a small percentage by playing what is known [...]

Blackjack hands are scored by their point total. The hand with the highest total wins as long as it doesn’t exceed 21; a hand with a higher total than 21 is said to bust. Cards 2 through 10 are worth their face value, and face cards (jack, queen, king) are also worth [...]

Blackjack, also known as twenty-one, is one of the most popular casino card games in the world. Much of blackjack’s popularity is due to the mix of chance with elements of skill, and the publicity that surrounds card counting (keeping track of which cards have been played since the last shuffle). [...]