Game Structure and Gross Returns
Paper Bridges features four rows of three bridges with one hidden hazard per row. You select one bridge per active row to survive. Gross returns for completing one to four safe rows are 1.44, 2.16, 3.24, and 4.86 times your stake. These returns include your original stake. The fourth row settles automatically if you do not collect earlier. A stake is deducted once at the start and persists before animation begins.
Probability and Expected Value
Each row has a one in three chance of hitting a hazard, meaning a two in three chance of survival per row. The probability of surviving k rows is (2/3)^k. The score function combines this probability with the return multiplier to yield an expected return of 0.96, or 96 percent. Simulation data confirms this, showing simulated returns near 96.05 percent for choice one and 95.98 percent for choice two. This indicates a consistent house edge of four percent across all modes.
Wallet Rules and Settlement
Stakes are set at 10, 25, 50, or 100 virtual coins, with 25 as the default. Payouts are computed in hundredths, and fractional carries are kept separate from credited whole coins. If you reload the page, any unfinished round is discarded without a refund. You can manually refill your balance to 1000 coins only when idle and below ten coins. Controls disable during active rounds, and minimum stake is ten coins.
Frequently asked questions
How is the payout calculated?
Gross returns include your stake and are multiplied by 1.44 to 4.86 based on rows survived. Payouts are calculated in hundredths, with whole coins credited and fractional remainders kept.
What happens if I refresh the page?
Any unfinished round is discarded without a refund or resumed settlement. The stake remains deducted from your balance.
