Atlantic City Blackjack Rules
New Jersey's regulated rule set: 8 decks (the deepest shoe in common use), dealer stands soft 17, double after split, late surrender, and — distinctively — dealer must check for blackjack before play continues (early peek), which is a procedural rule this engine doesn't need to model since it doesn't change basic-strategy decisions or the house edge.
Why this rule set matters
Going from 6 to 8 decks barely moves the edge (a couple hundredths of a percentage point) — the deeper shoe is a much smaller factor than players assume. Surrender availability matters far more here than deck count.
How the 0.4% is calculated
Starts from a 6-deck, S17, DAS, no-surrender, 3:2 baseline (≈0.46%) and adds the published effect of every rule above that differs from it — deck count, dealer soft-17 behavior, double after split, surrender, payout ratio. Same engine as the house edge calculator, so toggling any of these rules there reproduces this number exactly.