Gambling Online 101
intermediate
12 min readBasic Strategy
The mathematically optimal way to play every hand.
BonusBell Team
Basic strategy is the mathematically optimal way to play every possible blackjack hand. It was developed by computer simulations of millions of hands and tells you exactly when to hit, stand, double, or split. In a common 3:2 multi-deck game, using the right chart can cut the house edge to roughly half a percent, though the exact number still depends on the rules.
Good to Know
Basic strategy is legal everywhere and not considered card counting. Many casinos even provide strategy cards you can use at the table.
Blackjack House Edge by Strategy
Strategy dramatically reduces the house advantage
Why Basic Strategy Works
Every blackjack decision can be mathematically analyzed based on:
- Your hand total
- The dealer's upcard
- Number of decks in play
Basic strategy tells you the play that loses the least (or wins the most) money over time. It does not mean you will win each hand. It means you are making the highest-EV decision available for the exact rules you are facing.
That last part matters. Strategy charts are rule-dependent. A 6:5 game, a dealer who hits soft 17, no double-after-split, or no surrender all move the edge. The core chart is still useful, but the best version is always the one built for the exact table you're playing.
Hard Totals
A hard hand contains no Ace, or an Ace counted as 1.
Hard Totals Strategy
| Your Total | Dealer 2-6 | Dealer 7-A |
|---|---|---|
| 8 or less | Hit | Hit |
| 9 | Double if 3-6, else Hit | Hit |
| 10 | Double if 2-9, else Hit | Hit |
| 11 | Double | Double (Hit vs A) |
| 12 | Stand 4-6, else Hit | Hit |
| 13-16 | Stand | Hit |
| 17+ | Stand | Stand |
Soft Totals
A soft hand contains an Ace counted as 11.
Soft Totals Strategy
| Your Total | Dealer 2-6 | Dealer 7-A |
|---|---|---|
| Soft 13-14 | Double 5-6, else Hit | Hit |
| Soft 15-16 | Double 4-6, else Hit | Hit |
| Soft 17 | Double 3-6, else Hit | Hit |
| Soft 18 | Double 3-6, Stand 2,7,8 | Hit 9,10,A |
| Soft 19+ | Stand | Stand |
Pairs
When to split pairs:
Pair Splitting Strategy
| Your Pair | Action |
|---|---|
| A-A | Split |
| 8-8 | Split |
| 10-10 | Stand |
| 5-5 | Treat as a double-or-hit hand, not a split |
| 4-4 | Split 5-6, else Hit |
| 2-2, 3-3 | Split 2-7, else Hit |
| 6-6 | Split 2-6, else Hit |
| 7-7 | Split 2-7, else Hit |
| 9-9 | Split 2-9 except 7, Stand 7/10/A |
Strategy Insight
On the standard basic-strategy chart, the most reliable pair anchors are to split Aces and Eights, keep Tens together, and play Fives like a doubling hand instead of a split.
When to Double Down
Doubling down lets you double your bet for one more card. Double when:
- Hard 11 – Against any dealer card (except A in some games)
- Hard 10 – Against dealer 2-9
- Hard 9 – Against dealer 3-6
- Soft hands – Against weak dealer cards (3-6 mostly)
Pro Tip
Doubling opportunities are where you make money in blackjack. Never double for less than the full amount if the situation calls for it.
When to Surrender
If your casino offers late surrender:
- Hard 16 vs dealer 9, 10, or A – Surrender
- Hard 15 vs dealer 10 – Surrender
Surrendering returns 50% of your bet. It's better than playing out a hand you'll likely lose.
Insurance: Just Say No
Warning
Never take insurance.It's a side bet that the dealer has blackjack when showing an Ace. It pays 2:1 but the true odds are 9:4 against. Insurance increases the house edge significantly.
Rule Variations
Adjust strategy slightly based on rules:
- Dealer hits soft 17 – Slightly worse for player
- Double after split allowed – More aggressive splitting
- Number of decks – Fewer decks = more doubling
Strategy Insight
Download a basic strategy chart for your specific rules (decks, dealer stands/hits soft 17, etc.) and study it until the decisions become automatic.
Drill It: Blackjack Spot Trainer
Assumes a common multi-deck 3:2 blackjack game with standard basic-strategy decisions and no surrender unless noted.
Current spot
Pair of 8s vs dealer 10
Your hand
8
8
Dealer upcard
10
Progress
0/0
Start answering spots to build recall.
Current streak
0
Consistency matters more than memorizing one hero spot.
Good to Know
Turn Memorization Into Recall
After you understand the chart, use the public blackjack drill to build speed. The goal is not just knowing the rule in theory. It is answering correctly before emotion or table pace gets a vote.
Related Reading
- Blackjack Basics— start with the rules and table flow if the chart still feels abstract
- Blackjack Advanced— what changes once you understand deviations, conditions, and tougher table environments
- Expected Value— why every hit, stand, split, and double decision is really an EV choice
Key Takeaways
- 1Basic strategy is mathematically proven optimal for every situation
- 2Split Aces and Eights; keep Tens together and play Fives as a double-or-hit hand
- 3Double down when you have advantage (11, 10, soft hands vs weak dealer)
- 4Never take insurance—it's always -EV
- 5Using perfect basic strategy reduces house edge to ~0.5%
Sources & References
- The original mathematical basic-strategy work was published in the Journal of the American Statistical Association in 1956 by Baldwin, Cantey, Maisel, and McDermott. (Original JASA paper)
- Modern chart generation still depends on the exact rule set, which is why rule-specific calculators remain the right way to verify a chart for a given table. (Rule-specific strategy calculator; House edge calculator)
- The often-quoted “around 0.5%” player disadvantage refers to strong 3:2 blackjack rules under proper basic strategy. Worse rules such as 6:5 payouts or H17 push the edge higher.
- Insurance remains negative EV for a basic-strategy player because the 2:1 payout does not compensate for the true frequency of dealer blackjack in a normal deck.
Mathematical claims are independently verifiable. BonusBell platform analysis reflects our tracked platform directory and dated source reviews as of March 2026.