Slotbook

Slotbook deals a 6×4 board across the two pages of an open book on a pirate island — anchor, compass, spyglass, rum, parrot, ship, treasure and the crossed swords, drawn and animated in house. A round is a page turn: the FLIP wheel, a swipe across the spread, or a long press to hand the wheel over to autoplay with its own limits and stop conditions.

Twenty lines are read left to right from the first reel, a wild substitutes inside a run, and the player chooses one of two risk levels. The bet is always the total: low risk spreads it across all twenty lines, high risk concentrates it into ten. Neither pays better than the other — the expected return is identical, and the risk level changes only how that return arrives, in rarer and larger wins at the smaller line count.

The jackpot works differently from most. The book is a scatter that the reels never deal; it is placed onto the finished page, up to three times, each attempt on its own. Exactly three open the chest, which pays 1,000×, 2,500× or 5,000× of the player's own total bet — about one round in 48,806. There is no pool, so nothing is withheld from other players to fund it, no liability accrues between wins, and an operator is never asked to seed it.

Both halves of the return are computed exactly rather than sampled: 93.16% from the line game and 3.84% from the jackpot, for 97.01% in total. Our audit derives those figures from the reel strips and pay tables without calling any of the game's own arithmetic, then plays 29,100,000 spins through the production engine and the full betting layer to measure what was actually paid.