Double-Deck Blackjack Rules
A common middle-ground table: 2 decks with double after split allowed, but dealer hits soft 17 — a mix seen often on cruise ships and smaller casinos looking to offer a "better odds" table without single-deck's dealing overhead.
Why this rule set matters
Keeping DAS while accepting H17 is a real net loss versus the 6-deck Vegas Strip baseline — H17's 0.22-point cost outweighs the small deck-count benefit, so this table is worse for the player than its "fewer decks" marketing implies.
How the 0.52% 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.