You're dealt a pair of 8s. The dealer shows a Ace. Split or play it as one hand? Basic strategy answers:
| Split ← | -0.3941 |
| Hit | -0.5171 |
| Stand | -0.6670 |
| Double | -1.0343 |
| You bust on the next card | 61.5% |
| Dealer Ace busts | 16.7% |
Split is worth 0.1231 more per unit than Hit. On a $10 bet that is $1.23 handed over every time you get it wrong. Across the 340 situations in this chart it ranks 318th by expected value — better than 22 of them, worse than 317. 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.
A pair of 8s is hard 16 — the worst total in blackjack. Splitting escapes the disaster and restarts two hands from 8, which plays far better than 16 against any card, even a Ace. It's not about winning big here; it's about losing less, and the math is unambiguous.