Board and layouts
The board has 16 cells, numbered left to right across four rows. Choose 3, 4 or 5 hazards before starting. The game samples one complete layout uniformly from 68, 72 or 24 permitted layouts, respectively. That layout stays fixed throughout the round.
Safe cells connect through horizontal or vertical neighbours. They must remain connected even if any single safe cell is removed. This constraint changes the chances from those of an ordinary board with independently placed hazards.
Chances and multiplier
Each cell displays its conditional chance of being safe among layouts compatible with the revealed safe cells. Percentages are rounded to one decimal for display; the calculation uses the full ratio. Already revealed cells, proven safe cells and proven hazards are disabled.
The gross multiplier is 0.97 × original layout count ÷ remaining layout count. It starts at 0.9700×. A safe pick divides the previous multiplier by that cell’s safe chance. A hazard ends the round with zero returned coins.
Collection and round end
After at least one uncertain safe pick, Collect returns the current gross value. A safe pick that leaves no uncertain cells triggers automatic collection. Stake and hazard settings, restoration and a second start are locked during play; sound remains available.
Settlement credits the whole-number part of stake × multiplier + saved fractional carry and saves the remainder for later rounds. The multiplier includes the stake; it is not a profit multiplier. A losing round returns zero and preserves the saved fraction.
Virtual wallet
A fresh wallet starts with 1,000 virtual coins. Available stakes are 10, 20, 50 and 100; the default is 20. Start deducts the chosen stake once and immediately saves the new balance. There is no deposit or withdrawal, and these coins have no cash value.
When idle with fewer than 10 coins, Restore sets the balance to exactly 1,000. It neither adds 1,000 nor runs automatically. It preserves the selected stake, hazard count and saved fraction.
Expected return and simulations
The mathematical expected gross return is 97% in the uniform-layout model for strategies using the revealed information and eventually collecting or losing. This is not a 97% chance of winning or a promised result for a session. Abandoning an unfinished round forfeits its possible return.
Privacy and audience
These observations do not establish anonymity or a complete account of server logs, retention, tracking, data sale or further processing. The absence of account and payment forms does not mean that no personal data are processed. No privacy policy for an outside 7JJ service has been verified.
The guide is intended for adults aged 18 and over as its own audience policy. The interface has no age verification, and this label is not a statement about the legal age or legality in any location.
Virtual coins make the demonstration free to use; they do not make every pattern of use harmless. You can choose a personal time or coin limit and stop without restoring the wallet. The demo does not enforce timers, spending limits or account exclusion.
Frequently asked questions
What does a cell percentage mean?
It is the chance of safety among layouts compatible with revealed safe cells, rounded to one decimal on screen. It is not a chance of winning the entire round.
When can I collect?
After at least one uncertain pick reveals a safe cell. If no uncertain cell remains after a safe pick, collection is automatic.
Is 97% a guaranteed return?
No. It is the expected gross return under the uniform-layout model, not a win probability or promised session result. An abandoned round forfeits its possible return.
