You hold Ace-2 — a soft 13, meaning the ace still counts as 11. Dealer shows 4. The correct basic-strategy play:
| Hit ← | +0.1025 |
| Double | +0.0584 |
| Stand | -0.2111 |
| You bust on the next card | 0.0% |
| Dealer 4 busts | 39.4% |
Hit is worth 0.0440 more per unit than Double. On a $10 bet that is $0.44 handed over every time you get it wrong. Across the 340 situations in this chart it ranks 134th by expected value — better than 206 of them, worse than 133. Expected value is per unit staked, computed for multi-deck, dealer stands on soft 17, double after split allowed. The model and the code are published as data.
The beauty of soft 13 (Ace-2): you cannot bust — the ace simply drops to 1 if the card is big. Against a dealer 4 (only 40% bust chance), your current total isn't good enough to stand on, and doubling doesn't pay against a card this strong. Free shot at improving: take it.
Soft hands are where most casual players leak the most: they play them like hard totals and miss every profitable double. Learning the six soft-total rows of the chart is the fastest win-rate upgrade there is.