The effect of this rule variation is a reduction in the house edge of 0.39% to a low 0.11%.
Special mention should be made about the Ezugi game, where early surrender against an ace is allowed. The most variable rules seem to be on surrender and the dealer peeking for blackjack. I think nobody allows re-splitting any pair. All are dealt from a shoe, with about 50% penetration. Live dealer blackjack rules vary quite a bit. Rummy (Blackjack variant popular in Costa Rica).21: Details on the Wizard\’s Simple Strategy.20: Blackjack doubling strategy when doubling after splitting aces is allowed.19: Blackjack splitting strategy when a back-player is betting.18: Basic strategy exceptions for three to six cards.16: Basic strategy when dealer exposes both cards.15: House edge using total-dependent vs.13: Probabilities in the first four cards.11: Value and strategy for 678 and 777 bonuses.9: Composition-dependent expected returns for 1 to 8 decks.5: Infinite deck expected return by player hand and dealer upcard.4: Blackjack standard deviation details.