1.4 
Blackjack —
To play Blackjack, run the PLT Games program. (Under Unix, it’s called plt-games).
Standard Blackjack rules with the following specifics:
1 player (not counting the dealer).
4 decks, reshuffled after 3/4 of the cards are used.
Dealer stands on soft 17s.
Splitting is allowed only on the first two cards, and only if they are equal. 10 and the face cards are all considered equal for splitting.
Doubling is allowed on all unsplit hands, not on split hands.
No blackjacks after splitting.
No surrender.
No insurance.
No maximum under-21 hand size.
Dealer’s second card is not revealed if the player busts (or both halves of a split hand bust).