In this article
What is Blackjack?
Blackjack (also called 21) is the casino card game with the best odds for the player — when played with correct basic strategy, the house edge is only about 0.5%. You play against the dealer, not against other players, making it one of the most accessible casino games to learn.
Goal of the game
Get a hand value closer to 21 than the dealer's hand, without going over 21. If you exceed 21, you "bust" and lose immediately — even if the dealer also busts.
Card values
- Number cards (2–10): worth their face value.
- Face cards (J, Q, K): worth 10 each.
- Ace (A): worth 11 OR 1 — whichever is better for your hand.
📌 A hand containing an Ace counted as 11 is called a "soft hand" (e.g., Ace + 6 = soft 17). A hand where the Ace must count as 1 is a "hard hand" (e.g., Ace + 6 + K = hard 17).
How a round plays out
- You place your bet before any cards are dealt.
- The dealer gives you 2 cards (both face up) and deals 2 cards to themselves (one face up, one face down — the hole card).
- You choose your action (hit, stand, double down, split).
- After you finish, the dealer reveals the hole card and plays by fixed house rules.
- Hands are compared — whoever is closer to 21 without busting wins.
Your actions
- Hit: take another card. You can hit as many times as you like, as long as you don't bust.
- Stand: keep your current hand and pass to the dealer.
- Double Down: double your bet and receive exactly one more card (then you must stand). Only available on your first two cards.
- Split: if your first two cards have the same value, split them into two separate hands, each with its own bet. Only available on the first two cards.
💡 Golden rules: Always split Aces and 8s. Never split 10s or 5s. These are universal basic strategy principles that apply in virtually every blackjack variant.
Dealer rules
The dealer has no choice — they follow fixed rules:
- Must hit on 16 or lower.
- Must stand on 17 or higher.
- In some variants: the dealer hits on soft 17 (Ace + 6).
This rigidity is exactly what allows you to use strategy — you can see one of the dealer's cards and calculate risk accordingly.
The natural blackjack
A natural blackjack is when your first two cards are an Ace + any 10-value card (10, J, Q, K), giving you 21 instantly.
A natural blackjack pays 3:2 — if you bet $10, you win $15 (plus your $10 back). If the dealer also has blackjack, it's a push (tie) and you get your bet back.
Basic strategy
Basic strategy is a mathematically optimal set of decisions for every possible combination of your hand and the dealer's visible card. Following it reduces the house edge to approximately 0.5%.
Core rules to memorize
- Always stand on 17 or higher (unless it's a soft 17 — check strategy charts).
- Always hit on 8 or lower.
- Double down on 11 when the dealer shows 2–10.
- Double down on 10 when the dealer shows 2–9.
- Stand on 12–16 when the dealer shows 2–6 (the dealer is likely to bust).
- Hit on 12–16 when the dealer shows 7 or higher.
Why the dealer's upcard matters so much
If the dealer shows a 6, they likely have 16 total (assuming their hole card is 10). With 16, they must hit and have a high chance of busting. This completely changes your strategy — sometimes it's better to stand with a weak hand like 14 and wait for the dealer to bust than to risk taking another card.
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