Survival Probabilities and Gross Returns
Ferry Locks requires selecting one of four exit locks before play. Each lock has a distinct survival chance at successive stages. Lock 1 offers an 80% survival rate with a 1.2x gross return. Lock 2 provides a 75% chance for a 1.6x gross return. Lock 3 has a two-thirds survival rate for a 2.4x gross return. Lock 4 delivers a 50% chance for a 4.8x gross return. Failure at any stage returns zero coins. The game does not allow manual exits during the round.
Expected Return and Simulation Evidence
The expected return is calculated by multiplying survival probability by the gross payout. For Lock 1, the product is 0.96. Lock 2 yields 0.72. Lock 3 results in 1.6. Lock 4 equals 2.4. Simulation data from one million rounds confirms these expectations. The simulated return for all modes averages approximately 96%. This indicates the game pays out 96% of wagers over time. No single round guarantees this return.
Stake Deduction and Settlement Rules
The selected stake is deducted once at the start of the round. The full stake persists in the wallet calculation before any animation begins. Settlement is automatic upon reaching the exit or the end of the reveal. Fractional cents are saved separately as a hundredths value. Whole coins are credited by flooring the result. The remainder stays as fractional carry. A reload discards the unfinished round without refund. No resume option exists for interrupted sessions.
Frequently asked questions
Does the demo use real money or require an account?
The demo uses virtual coins with no cash value. No account or payment is required to play. The wallet is stored locally in your browser.
How is the balance restored if it runs out?
You can manually restore the balance to 1000 coins when idle and below 10. This sets the balance to a fixed amount rather than adding to it. The refill is disabled while a round is active.
