Twenty-One, more commonly known as Blackjack, is a comparing card game played between one or more players and a dealer. The objective is simple: have a hand value closer to 21 than the dealer’s without exceeding it.
Players are dealt cards with numerical values — number cards count as their face value, face cards count as ten, and aces can count as either one or eleven. Players may choose to draw additional cards ("hit") or keep their current hand ("stand") based on their total and strategy.
Unlike many other card games, Twenty-One blends chance with probability and decision-making. Strategic play, understanding odds, and managing risk are central elements, which is why the game is a staple in casinos and casual play alike. Numerous variations exist, including house rules that affect strategy and outcomes.