Time and coin limits
This demo is restricted to adults 18+ and uses coins without cash value or prizes. Set session time and virtual-coin limits before playing, then stop at those limits. Raising a stake to recover losses does not improve expectation. If playing affects responsibilities or becomes hard to control, stop and seek suitable independently verified local support.
Expected return
Exact expected return is 97% for permitted stopping policies. The initial 3% reduction is applied once; conditional safe-branch compensation preserves expectation. Choosing coordinates or stopping changes risk and variance, not this expectation. A short session is not guaranteed to match it.
Wallet and restoring balance
Settled balance and fractional payout carry persist in localStorage. Reloading during a round ends it without refunding its already deducted stake. Outside a round, refill restores 1000 coins when balance is below the smallest stake; it does not add 1000 or reset fractional carry. Hazard count, stake and refill are locked during play.
Own-site rules
These rules describe only this original virtual game. This guide does not determine legal availability of an external service, certify its fairness or promise income. The own-site 18+ restriction is not a statement about every jurisdiction’s legal age.
Checking external claims
A matching brand, professional design, search result or HTTPS connection does not verify ownership, authorisation or safety. Match any claim against an independent regulator register, including entity, current status, scope and listed domains. No operator licence or service is endorsed here.
Frequently asked questions
Is this an operator website?
This independent GamGam guide supplies its own free Four Quadrants Mines demo. Operator identity, domains, licence, apps, payments, support and commercial game equivalence have not been independently verified. No operator account or commercial link is supplied here.
What is the quadrant rule?
Choose 4, 5 or 6 hazards on a 4×4 board. Divide it into four disjoint 2×2 quadrants: top-left, top-right, bottom-left and bottom-right. Each quadrant contains at least one hazard. This rule does not apply to all overlapping 2×2 squares. All 256, 1536 or 4480 legal layouts respectively are equally likely. One layout stays fixed throughout the round.
How is value calculated?
Live value starts at 0.97 times the virtual stake. A safe reveal divides it by that cell’s exact conditional safe probability among the remaining compatible legal layouts. A hazard ends the round with zero return. Reveals change knowledge, not the hidden layout.
How do reveals change odds?
With 4 hazards there is exactly one hazard in each quadrant. Every cell initially has safe probability 3/4. A safe first choice changes a 20-coin stake’s value to 20×0.97/(3/4), about 25.867 coins. Within that quadrant the next unrevealed cell has safe probability 2/3; another quadrant still has 3/4. Revealing three safe cells in one quadrant proves its fourth cell hazardous.
Explore the original free Four Quadrants Mines game.
