Blackjack Strategy Trainer 21
The 9,9 chart
| Dealer upcard | Play 9,9 |
|---|---|
| 2, 3, 4, 5, 6 | Split |
| 7 | Stand |
| 8, 9 | Split |
| 10, Ace | Stand |
Why stand against dealer 7?
A pair of 9s totals 18. Against a dealer 7, 18 is already strong because the dealer often finishes at 17. Splitting gives up a made 18 and creates two hands starting at 9 against a dealer card that is not weak enough to justify it.
Why split against dealer 9?
This is the counterintuitive part. 18 against a dealer 9 is not as safe as it feels. The dealer's expected total is high enough that standing on 18 is mediocre. Two hands starting at 9 perform slightly better, so the correct play is split.
Why stand against 10 and Ace?
Dealer 10 and Ace are too strong. Splitting 9s creates two hands that need help, and the dealer is too likely to make 20, 21, or another strong total. Standing on 18 is not exciting, but it is better.