Blackjack questions, answered.

What is blackjack basic strategy?

Basic strategy is the mathematically optimal decision — hit, stand, double, or split — for every combination of your hand and the dealer’s upcard. It is derived from the odds of each possible outcome given the cards left in the shoe.

It does not beat the house over time, but it shrinks the casino’s edge to roughly half a percent on favorable rule sets. Think of it as the baseline every serious player learns before anything else.

Does basic strategy change with the table rules?

Yes. Specific cells in the chart shift when rules change — whether the dealer hits or stands on soft 17, whether you can double after split, surrender availability, and whether doubling is allowed on any two cards all matter.

A chart built for one casino floor may be wrong at another table. Use our basic strategy calculator to generate a chart matched to your exact rule set rather than memorizing a generic table.

What is the house edge when you play perfect basic strategy?

On a common six-deck game where the dealer stands on soft 17, doubling after split is allowed, and blackjack pays 3:2, the house edge is roughly 0.5%. That means about 50 cents of expected loss per $100 wagered over the long run — variance will swing individual sessions far more than that average.

Worse rules push the edge higher: 6:5 blackjack payouts, dealer hitting soft 17 without compensating perks, or no doubling after split each add cost. Always read the felt before you sit down.

How long does it take to memorize basic strategy?

Most people get hard totals (12–16 vs dealer upcards) down in a few short sessions. Soft hands and pairs take longer because they come up less often and the exceptions pile up.

Short, frequent Practice reps beat one long cram session — drill a handful of spots daily in the app’s Practice menu or study the logic in the Academy before testing yourself at the table in Play.

How do you count cards in blackjack?

The Hi-Lo system assigns +1 to cards 2 through 6, 0 to 7 through 9, and −1 to 10, jack, queen, king, and ace. As each card is dealt, you add its value to a running total in your head.

A high positive running count means the remaining shoe is rich in tens and aces, which slightly favors the player — more blackjacks and stronger doubles. This site teaches counting as a math exercise in simulation only; see our card counting guide for how the app supports it.

What is the true count and how do you calculate it?

The true count normalizes the running count by dividing it by the estimated number of decks still in the shoe. A running count of +6 with one deck remaining is a very different situation from +6 with six decks left.

True count = running count ÷ decks remaining (rounded to the nearest half or whole number in practice). Index plays and bet-sizing decisions are based on true count, not the raw running total alone.

Is card counting illegal?

Counting cards in your head is not illegal in the United States. It is not cheating — no device, marked cards, or collusion is involved.

Casinos are private businesses and may ask you to leave, restrict your bet spread, or shuffle early if they suspect counting. We teach it here as an educational math exercise in simulation only, with no real money at stake.

Does card counting still work with 6 or 8 deck shoes?

The player’s edge is much smaller with more decks and depends heavily on deck penetration and bet spread. Six- and eight-deck shoes are standard on casino floors precisely because they dilute the counter’s advantage.

Shallower penetration (the dealer shuffling early) and a flat bet spread reduce any edge toward zero. Counting remains a useful learning exercise; expecting consistent profit in real casinos is unrealistic for most players.

6 deck vs single deck blackjack — which is better?

Fewer decks slightly lowers the house edge because removing one high card has a bigger impact on a smaller shoe. In theory, single-deck blackjack is friendlier to the player.

In practice, single-deck games on casino floors very often pay 6:5 on blackjack instead of 3:2, which more than cancels any deck-count benefit. Rules matter far more than deck count alone — always check the payout banner on the felt.

What does a 6:5 blackjack payout mean?

A natural blackjack on a $10 bet pays $12 at 6:5 instead of $15 at 3:2. That shortfall adds roughly 1.4% to the house edge — a massive swing compared to the ~0.5% edge you face with perfect basic strategy on a good 3:2 table.

Always look for “Blackjack pays 3 to 2” on the table layout. If you see 6:5, the game is significantly worse even if every other rule looks standard.

Should you ever take insurance?

Under basic strategy, no. Insurance is a side bet that the dealer has a ten in the hole when showing an ace — and it pays 2:1 on a bet that loses more often than it wins at even money.

Only a card counter with a sufficiently high true count (around +3 or higher with Hi-Lo) has a mathematical reason to take insurance, because the remaining shoe is rich enough in tens that the bet becomes favorable. Casual players should decline every time.

When should you split and when should you double down?

Always split aces and eights; never split tens or fives. Double on hard 11 against most dealer upcards, and on hard 10 when the dealer shows 9 or lower — subject to whether your table allows doubling on those totals.

Exact answers depend on the full rule set. Our basic strategy calculator shows the simulated best play for every hand under your chosen rules rather than relying on memory alone.

Is this real money gambling?

No. Everything on winning-games.com and in the Win at Blackjack Android app is educational. All gameplay uses simulated chips with no cash value — you cannot win real money or prizes.

The site offers free browser tools (basic strategy charts, Monte Carlo simulation, and this FAQ), and the app adds Play, Academy, Practice, and more on your phone. Intended for users 18 and older. Download free on Google Play.

What is a Monte Carlo blackjack simulation?

A Monte Carlo simulation runs a hand or decision thousands of times with randomized shoes and averages the results to estimate expected value (EV). Instead of guessing whether hitting 16 vs a dealer 10 is better than standing, you measure it.

Our free Monte Carlo simulator runs entirely in your browser — no data is uploaded. Results are approximations that converge as you increase the number of trials per move.