Blackjack is a card game played between a player and a dealer. It is one of the few casino games that allows a player to reduce the house edge through skill and proper play. The objective is to beat the dealer by accumulating cards with a value higher than 21. This can be accomplished either by hitting (requesting additional cards) or by standing (keeping current cards) based on predetermined rules. The game is played on a semicircular table that can accommodate up to seven players, known as spots. The cards are dealt face up to each player and the dealer.

Once all bets are placed, the dealer will deal two cards to each player. Then, each player decides whether to hit or stand based on predetermined rules. If the player stands, he must assume that the dealer’s card is worth 10. In contrast, if the player hits, he must take another card or risk busting his hand.

If the dealer has a blackjack, all players lose their bets (unless they also have a blackjack). Otherwise, the round is considered to push and the player gets his original bet back. The dealer then collects all of the cards, shuffles them and deals a new round.

The game’s mathematics are complex, but a basic strategy chart can help you make the right decision for each situation. To improve your chances of winning, memorize the chart and practice with flash cards before playing for real money. However, it is important to stay within your budget and never deviate from the chart based on your feelings.

Card counting is a technique that can give players a 1% to 2% advantage over the dealer in the long run. It involves keeping track of the concentration of 10s and aces in the deck, which changes with each card that is dealt. The most powerful card-counting systems utilize a plus-and-minus system to keep track of the cards. These systems are illegal in most online casinos and standard blackjack games.

Many blackjack variations offer side bets, such as Perfect Pairs and 21+3. However, these bets have a high house edge of up to 10%. They are best avoided. It is also advisable to remain sober throughout the game. Insufficient alcohol intake is a common cause of poor decision making in blackjack. This is especially true if you’re playing with a large group of people.