Straight answer: Nine is a target-number card game. Cards are dealt toward a fixed target, you choose to take another card or hold, and whichever side lands closer to the number without passing it takes the round.
That single decision - hit or hold - is the whole skill surface, which is why the game suits players who want cards without a poker study course. Rounds settle in well under a minute, minimums start low, and the paytable fits one screen.
Live-table regulars who enjoy the measured dealer pace of Oceania Vip Blackjack will recognise the family resemblance here; Nine simply trades the shoe and the etiquette for speed. It sits on the ph444 casino card shelf beside the other quick counters, one tap from the reels floor.