The purpose of this guide
The guide explains a specific virtual-coin demo, its controls and mathematical limits. It provides no verified outside operator catalogue or commercial comparison.
The original demo
The board has four rows and four columns. Choose 3, 4 or 5 mines. Read each column from top to bottom, with 0 meaning safe and 1 meaning mine. Neither of its two consecutive three-cell windows may contain 010: safe, mine, safe. The game draws uniformly among complete boards with the chosen mine count that meet this rule.
Practical rules and return limits
Select a stake of 10, 20, 50, 100 or 200 virtual coins and 3, 4 or 5 mines. Defaults are stake 20 and 3 mines. Starting deducts one whole stake. Stake, mine count, refill and starting another round remain locked during play. Eligible cells and, after a safe reveal, Bank current quote remain available. Sound can be toggled. There is no auto queue or random-cell button. The exact expected unrounded gross return is 96% of the stake for the tested stopping policies. It is not a 96% winning probability or a promised player or session result. Saved simulations are sample observations and can differ from that expectation. The demo itself draws actual random boards within the allowed set; its outcomes are not simulation statistics or outside casino results.
The local wallet
A new wallet starts with 1,000 virtual coins. Balance and fractional carry are stored in browser localStorage, including zero balance. Settlement adds raw gross return to previous carry, credits whole coins and saves the fractional remainder. A mine’s zero gross return leaves previous carry unchanged. While idle below 10, manually restoring sets the balance to 1,000; it does not add 1,000 and preserves carry. Reloading an unfinished round loses its state. Its stake remains deducted; there is no payout, refund or resumed round. Saved balance and carry remain, while controls return to stake 20 and 3 mines. Clearing cached files can leave localStorage intact. Removing this site’s stored data may remove wallet values.
Fonts and counter resources
The pages declare Google Fonts and Statinside counter 44: https://statinside.com/counter.js and the noscript image https://statinside.com/pixel.png?id=44. External font and counter requests may occur. These declarations do not establish an exhaustive record of actual requests or processing.
Who the guide is for
This guide and demo are intended for adults aged 18 or over. That policy does not verify a visitor’s age or establish local legality. Virtual coins have no cash value and the demo has no login, deposit or withdrawal flow. Dedicated rules, privacy and responsible-use pages provide further detail.
Frequently asked questions
Is an outside bf5 operator verified?
No outside operator, licence or official link has been verified by this guide. The demo does not establish those facts.
Can I withdraw the coins?
No. Virtual coins have no cash value and the demo has no payment or withdrawal flow.
Are fonts the only external resources declared?
No. Google Fonts and Statinside counter 44’s script and noscript image are declared. Other processing is not excluded.
