Independent guide · original demo · 18+

Ferry Locks: Probability and Payout Guide

The official website of bp99.

The official website of bp99. This guide details the exact survival probabilities and payout structures for the Ferry Locks demo. It explains how stakes are managed, how gross returns are calculated, and how settlements occur without manual intervention.

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Survival Probabilities and Gross Returns

Players select an exit lock between one and four before starting. The chances of surviving successive locks are 80%, 75%, two-thirds, and 50% respectively. Reaching your chosen exit yields gross returns of 1.2×, 1.6×, 2.4×, or 4.8×. Failure results in zero return, and no manual exit is allowed during the round. The score function confirms survival rates of 0.8, 0.6, 0.4, and 0.2 when multiplied by gross returns.

Stakes, Settlement, and Wallet Rules

Stakes of 10, 25, 50, or 100 are available, with 25 as the default. The stake is deducted once at the start and persists before animation. Payouts are computed in hundredths, with fractional carry added to credited whole coins. Automatic settlement occurs at the exit or end of reveal. Reloading discards unfinished rounds without refund, and the stake remains deducted.

Simulation Evidence and Controls

Simulations over one million rounds show an expected RTP of 96%, with simulated results ranging from 95.89% to 96.29%. Controls disable during active rounds, and manual refill is only available when the balance drops below ten. The interface resets to one upon reload, preserving the pending round flag in local storage.

Frequently asked questions

How are fractional amounts handled in payouts?

Payouts are calculated in hundredths. Fractional carry is persisted separately and added to credited whole coins, retaining the remainder between zero and ninety-nine.

What happens if I reload the page mid-round?

The unfinished round is discarded without refund or resume. The stake remains deducted, and the interface resets to the initial state.