European (No Hole Card) Blackjack Rules
European no-hole-card blackjack: the dealer doesn't draw a second card until after the player acts, so a dealer blackjack behind a 10 or Ace can cost a player who already doubled or split — a real structural difference from US rules, though this engine's pure basic-strategy math (no double-after-split, no surrender) matches the common European table configuration.
Why this rule set matters
No double-after-split is the quiet edge-mover here: it looks like a minor restriction but costs about 0.14 percentage points versus a DAS table, on top of the no-hole-card risk that basic strategy tables don't fully capture on their own.
How the 0.6% 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.