Pair of aces vs dealer 4: hit, stand, or split?
Split. Pair of aces against a dealer 4 is played the same way whether the dealer hits or stands on soft 17.
- Dealer hits soft 17Split
- Dealer stands on soft 17Split
- Split: separate a pair into two hands and play each one on its own.
Why
A pair of aces totals a weak soft 12 if played together. Split them and each ace becomes its own strong starting hand.
A pair is two cards of the same value, and any two 10-value cards count as a pair of 10s.
The numbers
- A dealer 4 busts about 40% of the time.
- A soft hand cannot bust on one card, because the ace drops from 11 to 1 if it has to.
| Dealer rule | 17 | 18 | 19 | 20 | 21 | Bust |
|---|---|---|---|---|---|---|
| Dealer hits soft 17 | 12% | 13% | 12% | 12% | 11% | 40% |
| Dealer stands on soft 17 | 13% | 12% | 12% | 12% | 11% | 40% |
| Play | Dealer hits soft 17 | Dealer stands on soft 17 |
|---|---|---|
| Split | +0.58best | +0.58best |
| Hit | +0.13 | +0.13 |
| Double down | +0.07 | +0.07 |
| Stand | -0.20 | -0.21 |
| Surrender (where offered) | -0.50 | -0.50 |
Scoring: a win scores +1, a loss -1, a tie 0, and a doubled hand counts twice. Surrender scores -0.50. Hit means take a card, then play on as well as possible. These are averages over many hands from the strategy audit behind the app, rounded and approximate. Any single hand can go either way.
Rules assumed
- 4, 6, or 8 decks (the chart is the same for all three)
- The dealer checks for blackjack when showing a 10 or an ace, before you act
- Double down is allowed on any first two cards
- Double after split is allowed
- Late surrender is offered, as your first decision only
- Split up to four hands; split aces get one card each and cannot be resplit
One-deck and two-deck games, tables without surrender, and dealers who do not check for blackjack change some plays. Check your table's rules before relying on any chart.
Both soft 17 rules are shown. The two charts differ on only 6 of 360 hands: see the dealer hits and dealer stands charts. The plays come from the verified 4 to 8 deck tables behind the Blackjack Trainer app (bs_4to8_h17_peek and bs_4to8_s17_peek).
Common questions: Pair of aces vs dealer 4
What is the correct play for a pair of aces against a dealer 4?
Split. This is basic strategy for 4 to 8 decks, and it is the same whether the dealer hits or stands on soft 17.
Does the soft 17 rule change a pair of aces against a dealer 4?
No. The play is the same whether the dealer hits or stands on soft 17. Only a handful of hands on the chart change with that rule, and this is not one of them.
Should I split aces against a dealer 4?
Yes. A pair of aces totals a weak soft 12 if played together. Split them and each ace becomes its own strong starting hand.
Does basic strategy guarantee a win?
No. It picks the play with the best average result, but any single hand can go either way, and the house keeps a small edge. This site and the Blackjack Trainer app are for practice only.