Session 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 and variance
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 persistence and refill
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.
Scope and own-site age restriction
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.
Frequently asked questions
Is this an operator website?
This independent 1996 WC guide supplies its own free Rim Balance 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 rim/interior rule?
Choose 2, 4 or 6 hazards on a 4×4 grid. Exactly half occupy the outer 12 cells and half the inner 4 cells. All 48/396/880 legal layouts respectively have equal probability. One randomly chosen layout remains fixed for the entire round.
How is the live 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 are safe probabilities counted?
With 2 hazards, each outer cell initially has safe probability 11/12 and each inner cell 3/4. A safe first outer cell from a 20-coin stake gives 20×0.97/(11/12), about 21.164 coins; an inner cell gives about 25.867. Subsequent probabilities count only compatible layouts and may increase or decrease.
Explore the free Rim Balance game and its exact conditional cell odds.
