Blackjack

Beat the dealer's hand without going over 21. Blackjack pays 3:2, a win pays 1:1 and a tie returns your bet. Double on any two cards (one more card), split a pair once (split aces get one card each). The dealer stands on soft 17 and checks for blackjack — no insurance.

Cards come from an infinite deck: every card is one number from your seeds, dealt in order. The verifier replays your hand from the seeds and your decisions.