The game uses a four-by-four board drawn uniformly from a specific subset of legal boards. Every row has equal first and last occupancy bits. This constraint defines the support for the draw. The demo does not require an account login or payment deposit.
Exact Game Rules and Mechanics
The board is a 4x4 grid. The mine count is selected from exact non-empty support configurations defined in the source. A board is drawn uniformly from all boards with the selected mine count satisfying the public support rule: every row has equal first and last occupancy bits.
Support and Probability Draws are uniform over that support, not over all unconstrained boards. Each safe reveal filters the support. Cells with zero conditional safe probability are disabled. Cells whose safe quote would exceed 1000 times stake are also disabled.
Payout Formula After any safe path, the gross cashout is calculated as: Gross Quote = 0.96 × Captured Stake × Initial Support Size / Current Compatible Support Size Known-certain mines are disabled. A mine returns zero. The captured stake and mine count are locked throughout the round.
Caps and Stopping A public 1000-times-stake cap applies. Any safe reveal that would exceed this cap is disabled. When no eligible reveal remains, the current quote is automatically banked. A manual bank becomes available only after at least one safe reveal. A mine ends the round with zero gross. No refill occurs during an active round.
Controls and Modes
Choose 3, 4 or 5 mines and a stake of 10, 20, 50, 100 or 200 virtual coins. Stake, mine count and refill lock during a round; sound remains available. Manual bank becomes available after a safe reveal. There is no automatic sequence of rounds. Statistical policies in the table are test paths, not additional selectable modes.
Wallet and Persistence
Initial Balance The demo starts with a balance of 1000 virtual coins.
Refill Rule A manual refill while idle below 10 sets the integer wallet to exactly 1000. This does not add coins; it sets the balance. Fractional carry persists across settlement, refill, and reload.
Persistence Settled balance persists locally, including zero. An unfinished round ending on reload ends without refund or resume. Clearing cached files may leave local storage where it is actually used.
Mathematical Evidence and RTP
The exact gross RTP is 0.96 for all modes. Simulation measurements are supporting sample observations, not the mathematical payout law.
| Mines | Policy | Exact RTP | Measured RTP | Example Path | Final Multiplier |
|---|---|---|---|---|---|
| 3 | 0 | 0.96 | 95.985 | [0] | 1.056 |
| 3 | 1 | 0.96 | 96.037 | [0,1,2] | 2.223 |
| 3 | 5 | 0.96 | 95.866 | [0,3,6...] | 84.48 |
| 4 | 0 | 0.96 | 96.020 | [0] | 1.150 |
| 4 | 5 | 0.96 | 96.367 | [0,3,6...] | 180.48 |
| 5 | 0 | 0.96 | 95.980 | [0] | 1.270 |
| 5 | 5 | 0.96 | 96.223 | [0,3,6...] | 314.88 |
Measured RTP values are derived from simulation rounds (e.g., 1,000,000 to 14,000,000) and may vary slightly from the exact 0.96 value.
Worked Examples
Example 1: 3 Mines, Path [0] Initial support size is 88; after safe cell 0, the remaining support is 80. Gross multiplier is 1.056.
Example 2: 3 Mines, Path [0,1,2] Remaining support is 38. Gross multiplier is 2.223.
Example 3: 5 Mines, Path [0,3,6,9,12,15,2,5,8,11,14] Surviving boards: 1. Gross multiplier: 314.88. Measured RTP: 96.223.
Privacy and Technical Notes
Storage The template uses browser localStorage for settled demo balance and fractional carry. This does not establish anonymity or exclude other processing.
Third Parties The page declares Google Fonts requests and the production builder includes Statinside visitor counter 44. These observations do not establish anonymity or absence of other processing.
Audience 18+ is this guide's own intended audience policy, not a claim about local law or an implemented age gate.
Frequently asked questions
Is this a real casino or operator?
This page provides its own virtual-coin demo. The external identity queried as KM4 has not been verified; this page establishes no operator, licence or payment service.
How is the payout calculated?
After any safe reveal, the gross cashout is 96 percent of captured stake times initial support size divided by current compatible support size. A mine returns zero. The formula is: Gross Quote = 0.96 × Captured Stake × Initial Support / Current Compatible Support.
What happens if I reload during a round?
An unfinished round ending on reload ends without refund or resume. Settled balance persists locally, including zero. Fractional carry persists across settlement, refill, and reload.
