Four guesses in a row, each one harder than the last. Get one right and you can take the money or push on. Get one wrong and the bet is gone.

• -Round 1 - is the first card red or black?
• -Round 2 - is the next card higher or lower than the first?
• -Round 3 - is the third card inside or outside the first two?
• -Round 4 - name the suit of the fourth card.
• -Win round 4 and it pays out on its own; there is nothing left to risk.

Cash Out appears once round 1 is won. Before that there is nothing banked to take.

Aces are low and kings are high. Every card is drawn fresh from a full deck, so what has already come out never changes what comes next.

• -Boundaries count as inside, and a tie counts for Higher or Same and Lower or Same alike.
• -On an ace the only call is Higher or Same-rank, and on a king only Lower or Same-rank.
• -If the first two cards are an ace and a king, nothing can be outside them, so that option is not offered.

Each round multiplies your stake by one divided by the chance of the option you picked - so the longer the odds you take, the more it pays.

The house edge of 5% is taken once, off the whole run, not once per round. That means the expected return is 95% whichever options you pick and whenever you stop. Picking long odds does not cost you anything extra - it only makes the swings bigger.

Multipliers and payouts are always rounded down, never up.

There is no play that beats the 95% return, so the only real question is how much variance you want.

• -Cashing out after round 1 wins half the time and pays 1.90x.
• -Riding all four rounds wins about one time in a hundred and pays enormously.
• -On round 2 the safe call is whichever side the card leaves more room for - a low card favours Higher.
• -On round 3 a wide gap favours Inside and a narrow one favours Outside; the button shows which is paying more.
• -Round 4 is a flat 1 in 4 whatever you pick, so the suit never matters.