Exactly two rows contain mines
The four-by-four board has 3, 4 or 5 mines. Exactly two of its four rows contain at least one mine; the other two rows are mine-free. The occupied rows are not identified in advance. Each allowed complete board is equally likely within the selected configuration. There are 288 legal boards with 3 mines, 408 with 4, and 336 with 5.
One fixed stake and its collection value
The captured stake is deducted once at the start and stays fixed. After a safe reveal, gross collection = 0.96 × captured stake × initial legal-board count ÷ remaining compatible-board count. Gross includes any returned stake. A mine pays zero. The 96% figure is expected gross across the pricing law, not the amount returned on every successful collection, winning frequency or a profit guarantee.
Reveal and collection controls
Choose the stake and mine count while idle. They and restoration stay locked during an active round; sound remains available. Manual collection becomes available after the first safe reveal. Covered eligible cells can still be selected. There is no automatic queue. Revealing a mine ends at zero; collecting manually or revealing every safe cell ends the round.
A precise three-mine example
Number cells 0 to 15 from left to right, top to bottom. With 3 mines, the initial support is 288 boards. If cell 0 is safe, 234 boards remain and the gross multiplier is 0.96 × 288 ÷ 234 = 1.1815384615. If cells 0,1,2 are safe, 162 boards remain and the multiplier is 1.7066666667. These are conditional examples, not a prediction that those cells are safe.
Manual restoration of a finite wallet
The demo starts at 1,000 virtual coins with no cash value. While idle with an integer wallet below 10, the restoration button sets that integer balance to 1,000. It does not replenish automatically or add another 1,000 to the balance. Saved fractional carry is preserved, and no deposit, withdrawal or real account flow is provided.
Fractions and unfinished reloads
Settlement credits whole coins and saves the fractional remainder for later settlements. The wallet, including zero, and saved fraction persist locally across ordinary reloads. Reloading an unfinished round ends it without a refund or resume: its deducted stake stays lost.
Frequently asked questions
Which boards can be drawn?
The four-by-four board has 3, 4 or 5 mines. Exactly two of its four rows contain at least one mine; the other two rows are mine-free. The occupied rows are not identified in advance. Each allowed complete board is equally likely within the selected configuration. There are 288 legal boards with 3 mines, 408 with 4, and 336 with 5.
How is the gross collection value calculated?
The captured stake is deducted once at the start and stays fixed. After a safe reveal, gross collection = 0.96 × captured stake × initial legal-board count ÷ remaining compatible-board count. Gross includes any returned stake. A mine pays zero. The 96% figure is expected gross across the pricing law, not the amount returned on every successful collection, winning frequency or a profit guarantee.
When can I collect or change the stake?
Choose the stake and mine count while idle. They and restoration stay locked during an active round; sound remains available. Manual collection becomes available after the first safe reveal. Covered eligible cells can still be selected. There is no automatic queue. Revealing a mine ends at zero; collecting manually or revealing every safe cell ends the round.
