How to Play Blackjack: Rules, Basic Strategy, and the 0.5% House Edge
Blackjack has the lowest house edge of any mainstream casino game when played with basic strategy. Complete beginner's guide to rules, hit/stand/double decisions, splits, insurance, and cryptographically verifiable shoes.
How to Play Blackjack: Rules, Basic Strategy, and the 0.5% House Edge
Blackjack has the lowest house edge of any mainstream casino game if you play basic strategy. The catch is "basic strategy" — a fixed decision table — which most players don't follow. The difference between basic strategy and average play is the difference between a 0.5% edge and a 4–5% edge. That's a 10× cost mistake.
This guide walks the rules + the basic-strategy table + the cryptographic fairness layer on 6proclub.
Basic rules
- You place a bet.
- The dealer deals two cards to you, two to themselves (one face-up, one face-down — the "hole card").
- Card values: 2-10 = face value, J/Q/K = 10, A = 1 or 11 (your choice).
- Goal: get a hand value higher than the dealer without going over 21.
- Your decisions, one at a time:
- Hit — take another card
- Stand — keep your current total
- Double — double your bet and take exactly one more card
- Split — if your two cards are the same rank, split them into two separate hands (with a matching bet on the second)
- Insurance — side bet if dealer shows an Ace (don't take this — see below)
- After your decisions, the dealer flips their hole card and must hit until reaching 17 or higher (specific rules vary; "stand on soft 17" is more player-favorable).
- Blackjack (Ace + 10/face on first two cards) pays 3:2.
- Any non-blackjack win pays 1:1. Push (tie) returns your bet.
The basic strategy table
This is the single most important table in casino gambling. Memorize it and your edge drops from ~4-5% to ~0.5%.
Hard totals (no ace, or ace counts as 1):
- 5-8: always hit
- 9: double vs dealer 3-6, otherwise hit
- 10: double vs dealer 2-9, otherwise hit
- 11: always double (against anything)
- 12: stand vs dealer 4-6, otherwise hit
- 13-16: stand vs dealer 2-6, otherwise hit
- 17+: always stand
Soft totals (ace counts as 11):
- A,2 / A,3: double vs 5-6, otherwise hit
- A,4 / A,5: double vs 4-6, otherwise hit
- A,6: double vs 3-6, otherwise hit
- A,7: stand vs 2,7,8 / double vs 3-6 / hit vs 9, 10, A
- A,8 / A,9: always stand
Pairs:
- 2,2 / 3,3 / 7,7: split vs 2-7, otherwise hit
- 4,4: split vs 5-6, otherwise hit
- 5,5: never split (treat as hard 10)
- 6,6: split vs 2-6, otherwise hit
- 8,8: always split (only exception: split even vs 10 and A)
- 9,9: split vs 2-9 except 7, stand vs 7, 10, A
- 10,10: never split (you have 20 — stand)
- A,A: always split
This table assumes dealer stands on soft 17 + double after split allowed. The exact decisions shift slightly for different rule sets, but the structure is consistent. Print this table or run it through a basic-strategy app the first 100 hands you play; it becomes automatic fast.
Insurance is a bad bet
When the dealer shows an Ace, you'll be offered "insurance" — a side bet that pays 2:1 if the dealer has a 10 in the hole (blackjack). Sounds tempting; in reality, the dealer has blackjack only ~31% of the time vs an Ace. Insurance carries a ~7% house edge on its own. Decline it every time, even if you have blackjack yourself. The math is unambiguous.
Provably fair blackjack — shoe commitment
The dealer's hole card matters enormously. Could the casino dynamically choose the hole card based on your bet? On a traditional online blackjack, you can't verify.
Provably fair blackjack commits the entire shoe (typically 6 decks shuffled together) before the deal:
- Before each shoe, the server publishes a SHA-256 hash of the seed
- The shoe order is deterministic from
serverSeed:clientSeed:shoeNonce - After the shoe is exhausted (or you walk away), the seed is revealed
- You hash it, confirm match, and recompute the full deck order from the published algorithm
- Every card you saw — yours, the dealer's hole card, the rest of the shoe — was already locked at deal time
The hole card couldn't be changed based on your play because the shoe was committed before any decisions were made. This is the strongest fairness guarantee in any card game.
Common beginner mistakes
Standing on 16 vs dealer 10. Yes, you'll bust often. Yes, you should still hit (or surrender if available). Standing loses more than hitting does on this exact match-up.
Splitting 10s. You already have 20. Splitting gives up the strongest non-blackjack hand for two unrelated 10-starts. Never split.
Not splitting 8s vs 10. Splitting 8s reduces a near-certain loss (16 vs 10) to two separate 8-starting hands. Still a loss in expectation, but a smaller one. Always split.
Taking insurance. See above. Worst side bet on the table.
Doubling 12+. Doubling means one card. You probably bust. Never double on hard totals above 11.
Bankroll guidance
Blackjack at basic strategy: 0.5% edge. For a $200 bankroll with $5 bets:
- Average loss per hour at 60 hands/hr = $5 × 60 × 0.005 = $1.50/hr
- Realistic session standard deviation: ±$50 around expectation
- 200 hands is enough to bust a $200 bankroll only ~3% of the time
It's the closest thing to "free entertainment" in the casino if you play the table. It's the worst bet on the floor if you don't.
Where to play it on 6proclub
Six-deck shoe, dealer stands on soft 17, splits + doubles + insurance + surrender all supported. Provably fair shoe commitment per session. Bets from $1. Open Blackjack in the lobby.
In one paragraph
Blackjack has the lowest house edge in the casino (0.5%) when played with basic strategy, and one of the higher edges (4-5%) when played by instinct. The whole game reduces to memorizing one decision table. Never take insurance. Always split 8s and Aces. Never split 10s. Provably fair blackjack commits the full shoe before the deal, so the hole card couldn't have been chosen based on your bet.