Blackjack mathematics
The edge belongs to the ruleset, not to the word “blackjack.”
Two tables can look identical while offering meaningfully different expected returns.
Benchmark
For one commonly analyzed six-deck game where the dealer stands on soft 17, correct basic strategy can reduce the house edge to roughly four-tenths of one percent. Change the rules and the figure changes.
Rules worth recording
| Rule | Why it matters |
|---|---|
| Blackjack pays 3:2 or 6:5 | Changes the value of the strongest starting hand. |
| Dealer S17 or H17 | Changes dealer drawing behavior and strategy. |
| Number of decks | Changes card composition and some strategy decisions. |
| Double after split | Affects value of splitting opportunities. |
| Surrender | Adds an exit option in selected poor situations. |
| Resplit / split-ace rules | Changes pair value. |
Avoid fake precision
A page that says “blackjack has a 0.5% house edge” without stating its rules is incomplete. Baccaret will attach assumptions to every strategy table, calculator or comparison.