You hold a hard 15 (no ace counted as 11) and the dealer shows a 9. Below is the correct basic-strategy decision computed by the Blackjack Theorem engine, and how it shifts with the table rules.
| Table rules | Correct play |
|---|---|
| 6-Deck · S17 · DAS | H Hit |
| 6-Deck · H17 · DAS | H Hit |
| 6-Deck · S17 · DAS · Surrender | H Hit |
| 2-Deck · S17 · DAS | H Hit |
| 8-Deck · H17 · DAS | H Hit |
The mathematically correct play is: hit. This is for 6-deck, dealer stands on soft 17, DAS. It can change with other rules (see the table).
It can. The table above shows the play under both S17 and H17 so you can match your exact table.