Hilo

Bet, see a card, then guess whether the next one is higher or lower. A tie counts as right either way. Each right guess multiplies your bet by exactly the odds against it. Cash out whenever you like after your first right guess. One wrong guess loses the bet. Every card is dealt from a fresh full deck, so the same card can come up twice. You keep 99% of the fair payout whatever you do: that 1% is the house edge, taken once, at the end.