Blackjack Basic Strategy: Solved in 1956, Ignored Ever Since
Basic strategy is the mathematically correct play for every hand against every dealer upcard. It cuts the house edge to roughly 0.5%. Playing on feel costs 2% or more. The chart is not a suggestion. Here it is in plain English.
Hard Hands (No Ace, or Ace Counted as 1)
- 8 or less: always hit.
- 9: double against dealer 3–6, otherwise hit.
- 10: double against 2–9, hit against 10/Ace.
- 11: double against everything except Ace (hit, in no-peek games).
- 12: stand against 4–6, hit everything else. Yes, hit against a 2 and 3.
- 13–16: stand against 2–6, hit against 7–Ace. The dealer busting is your win condition.
- 17+: stand. Always.
Soft Hands (Ace Counted as 11)
- Soft 13–15 (A-2 to A-4): hit; double against 5–6 where allowed.
- Soft 16–17 (A-5, A-6): double against 4–6, otherwise hit.
- Soft 18 (A-7): double against 3–6, stand against 2/7/8, hit against 9, 10, Ace. The most-misplayed hand in blackjack.
- Soft 19+: stand (double soft 19 vs 6 in H17 games if you want the last decimal).
Pairs
- Aces and 8s: always split. A pair of 8s is 16; two hands starting on 8 beat one terrible hand.
- 10s and 5s: never split. 20 is a made hand; two 5s are a 10, double instead.
- 9s: split against 2–6 and 8–9; stand against 7, 10, Ace.
- 2s, 3s, 7s: split against 2–7. 6s: split against 2–6. 4s: split only against 5–6 (DAS).
Why Discipline Pays
Every deviation has a measured cost. Standing on 16 vs 10 because it "feels safer": paid mistake. Taking insurance: a side bet with a ~7% edge, see side bets for why it exists. Table rules move the baseline too, payouts and dealer rules are covered in rules that change the house edge. Print the chart, play it cold, and read the full blackjack guide for table selection and bankroll. Discipline is the whole strategy. 18+.
How to Actually Learn It
Nobody memorises 280 cells in an afternoon. Learn it in layers: hard totals first (they're 70% of hands), then pairs, then soft hands. Keep the chart open in a second window - online, nobody is rushing you, and RNG tables wait forever. Drill in free-play mode until the common spots are automatic: 12–16 against a high card, soft 18, the always/never pairs. Two evenings of demo play beats a month of reading. The mistakes that cost the most money in practice: standing on soft 18 against a 10, not doubling 11, and splitting 10s "because the dealer looks weak". The dealer doesn't look like anything. It's an algorithm.
Basic Strategy FAQ
Does basic strategy let me beat the casino?
No. It reduces the house edge to ~0.5% with good table rules: the best price in the building, still a price. Counting cards is the only way past it, and online conditions (frequent shuffles, continuous shufflers) are built to prevent exactly that.
Do strategy charts change with the number of decks?
A handful of edge cells shift between single-deck and multi-deck games, worth a few hundredths of a percent. Play the standard multi-deck chart everywhere online and you're within rounding distance of perfect.
Why does the chart tell me to hit 16 against a 10? It always busts.
It loses either way, that's a bad hand, not a bad decision. Hitting loses slightly less often than standing over the long run. Basic strategy doesn't promise good outcomes from bad hands; it promises the cheapest available outcome. That's the whole game.