Should you double soft 15 against a 4?
Double. If you can't double, hit. The book doubles soft 15 against a 4, 5 or 6 and hits against the rest.
Why
A soft hand can't go over 21 on one card: the ace drops to 1 when it has to. So doubling soft 15 risks no break, only the size of the bet.
With a 4 showing, the dealer goes over 21 39.8% of the time. It goes over more often only with a 5 or 6 showing.
When the answer changes
This one doesn't change. Every rule set the chart covers doubles soft 15 against a 4: one, two, six or eight decks, the dealer hitting or standing on soft 17, with or without double after split and surrender.
The full basic strategy chart for six decks, dealer hits soft 17, with every other rule set a tap away.
Questions
Should you double soft 15 against a 3?
No. Against a 3 the book hits soft 15. A dealer showing a 3 goes over 21 37.7% of the time.
Is it different at a single-deck table?
No. At the app's table with a single deck, the book still doubles. So does every rule set the chart covers.
More hands
- Should you double soft 14 against a 4?
- Should you double soft 16 against a 3?
- Should you double soft 13 against a 5?
- Should you double soft 17 against a 3?
- Should you double soft 17 against a 2?
- Blackjack hands, one at a time
Guides
Know the book before you sit down.
