What is Blackjack? Learning about the concept and history of the game

Saturday, December 27, 2025

Blackjack is one of the most popular card games in casinos thanks to its simple rules and high level of strategic depth. So what exactly is Blackjack? What are the most common variations of the game? Let’s explore these questions in detail in the article below.

What Is Blackjack?

Blackjack is a card game played with a standard 52-card deck. Typically, casinos use between one and eight decks shuffled together to reduce the effectiveness of card counting and increase randomness. The objective of the game is to achieve a hand value higher than the dealer’s without going bust, meaning exceeding 21 points. One of the most appealing aspects of Blackjack is that all players compete directly against the dealer rather than against each other.

image 20 | Sunwin.org
Blackjack is one of the most popular card games found in casinos worldwide.

The name “Blackjack” originates from a special bonus payout in the game’s early history. At that time, a player who received the Ace of Spades or Ace of Clubs together with a black 10-value card (10, Jack, Queen, or King) would be rewarded with a generous 10-to-1 payout.

Today, Blackjack can be found in major casinos worldwide, from Macau to Las Vegas, and is also widely available on online platforms such as Sunwin. In Vietnam, the game is commonly known as “Xì dách,” while in northern regions it may be referred to as “xì bàn” or in some places “xì lát.” Blackjack’s popularity stems from its strong entertainment value and high return-to-player rate, which can reach up to 99% when played with optimal strategy.

According to statistics from the American Gaming Association, Blackjack accounts for more than 30% of table-game revenue in major casinos. The game is suitable for both beginners and experienced players due to its flexible betting limits, which can range from small amounts to very high stakes per hand. In Vietnam, Blackjack is often played during festive gatherings or through reputable online card game platforms.

The Origin, History, and Development of Blackjack

Now that we understand what Blackjack is, let’s look at its origins. The game traces its roots back to Europe in the 17th century, where a card game known as “Vingt-et-Un” (Twenty-One) was popular in France. Blackjack was introduced to the United States in the 18th century through European immigrants.

image 21 | Sunwin.org

In its early days in American casinos, a special 10-to-1 payout was offered for hands containing the Ace of Spades and the Jack of Spades, which led to the name “Blackjack.” In 1931, when gambling was legalized in Nevada, the game experienced rapid growth and became a core offering in Las Vegas casinos.

In 1960, Professor Edward Thorp published the book “Beat the Dealer,” the first work to apply probability theory and mathematics to Blackjack strategy. His card-counting methods revolutionized the game and significantly influenced how players approached it.

By the 1990s, Blackjack entered the online space alongside the growth of the internet. Modern developers such as NetEnt and Microgaming have since introduced advanced versions, including 3D Blackjack and live dealer games with real dealers streamed via webcam. One reputable online gaming platform where players can experience these formats is Sunwin.

Popular Variations of Blackjack

While many people understand the basic concept of Blackjack, not everyone is familiar with its many variations. Each version comes with slightly different rules and gameplay mechanics. Below are some of the most well-known variants.

image 22 | Sunwin.org

European Blackjack

This is one of the most common variations. In this version, the dealer receives only one card face-up and does not check for Blackjack immediately. This visible dealer card gives players more information early in the round.

However, the dealer wins on ties unless the player has a natural Blackjack. Late surrender options may be limited, meaning players cannot always exit the game early with partial losses.

Double Attack Blackjack

This variation is often associated with Spanish 21. Its main feature allows players to double their original bet after receiving the first two cards. Key rules include the removal of all 10-value cards from the deck, the requirement to keep the hand total as close to 21 as possible without exceeding it, and the option for players to surrender at any time.

image 23 | Sunwin.org

Vegas Strip Blackjack

Las Vegas is often described as both a paradise and a battleground for card players worldwide. Vegas Strip Blackjack is a variation commonly found in casinos along the famous Strip. Players aim to beat the dealer by getting as close to 21 as possible. The dealer must stand on 17, and a natural Blackjack typically pays out at 3:2.

Bonus Blackjack

This version is very similar to standard Blackjack, with the same core objective of beating the dealer without going over 21. Bonus Blackjack includes a side bet that players place before any cards are dealt. If the player receives a Blackjack, the bonus payout depends on the wager amount and the specific casino rules. If no Blackjack occurs, the side bet is lost.

Blackjack Switch

This variation allows players to switch cards between two hands during the game, provided that equal bets are placed on both hands. If the initial cards are unfavorable, players can alter the situation by exchanging cards between hands. This added flexibility is the main reason why Blackjack Switch is popular among many players.

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