Should you double 11 against a 10?
Double. If you can't double, hit. The book doubles 11 against every dealer card.
Why
Doubling puts out a second bet, the same size as the first, for exactly one more card. From 11, 6 of the 13 ranks give you 19 or better: an 8, 9, 10, jack, queen or king.
A 10 is a strong card: the dealer ends on 17 or better 77.0% of the time, after checking for blackjack. The book doubles 11 against it anyway. Four ranks make 21 on the spot: the 10, jack, queen and king.
When the answer changes
This one doesn't change. Every rule set the chart covers doubles 11 against a 10: 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 11 against an ace?
Yes. Against an ace the book doubles 11. A dealer showing an ace goes over 21 20.1% of the time, after checking for blackjack.
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 11 against an ace?
- Should you double 10 against a 10?
- Should you hit 14 against a 10?
- Should you hit 15 against a 10?
- Should you double 10 against an ace?
- Blackjack hands, one at a time
Guides
Know the book before you sit down.
