Game Mechanics and Row Probabilities
Paper Bridges features four rows with three bridges each, containing one hidden hazard per row. You select one bridge per active row to survive or collect. The probability of surviving exactly k rows is determined by the fraction two-thirds raised to the power of k. Each successful row multiplies your stake, but the overall expected return remains fixed at ninety-six percent. You must choose to collect after any safe row or continue to the next bridge. The game forces automatic settlement after the fourth row, ending the round regardless of your choice.
Gross Returns and Stake Options
The demo offers four stake levels: ten, twenty-five, fifty, and one hundred coins, with twenty-five as the default. Gross returns include your original stake and are calculated as follows: 1.44x after one row, 2.16x after two rows, 3.24x after three rows, and 4.86x after four rows. These values represent the total amount returned to your wallet, not just the profit. When you collect, the system computes the payout in hundredths. Any fractional carry is persisted separately, while only the floor of whole coins is credited to your balance. The remainder stays in the fractional carry until the next round.
Settlement, Wallet Rules, and Evidence
A full stake is deducted once at the start of a round and persists before any animation begins. If you reload the page, any unfinished round is discarded without a refund or resume option, and the stake remains deducted. The demo wallet starts with one thousand coins. You can manually refill your balance to one thousand coins only when idle and the balance falls below ten coins. Simulation evidence from one million rounds confirms an expected return of ninety-six percent, with simulated results ranging from ninety-six point zero three to ninety-six point twenty-seven percent. This confirms the mathematical consistency of the gross payout structure.
Frequently asked questions
What happens if I refresh the page during a round?
The unfinished round is discarded without a refund. Your stake remains deducted, and you must start a new round. Controls reset upon reload, and no partial progress is saved.
How is the payout calculated when I collect?
The payout is computed in hundredths and includes your original stake. The system credits the floor of whole coins to your wallet and keeps the remainder as a fractional carry. This ensures precise accounting of virtual coins without losing small fractions.
