No authenticated payment services
No external payment methods, times, fees, limits, account requirements or identity-document procedures have been verified for DuoGaming. This site has no real-money cashier or identity-upload form. Its local virtual coins cannot be bought, withdrawn or redeemed.
Local coins and settings
Local demo coins cannot be exchanged for money, withdrawn or used as evidence of an operator balance. Settings return to the interface defaults on reload; settled wallet and fractional carry persist. The game is not an authentication or external-security test.
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.
Verifying 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.
Technical data
There are no account, payment or identity-document forms here. Fonts, the visit counter, server and CDN requests can expose technical data including IP and browser details. Complete anonymity, third-party data use and cookie lifetimes are not established. Clearing cache alone may leave localStorage intact.
Frequently asked questions
Is this an operator website?
This independent DuoGaming guide supplies its own free Open Circuit 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 public layout rule?
Choose 3, 4 or 5 hazards on a 4×4 grid. Shared horizontal or vertical edges connect all hazards into a single graph, and that graph has no cycle. A solid 2×2 hazard block forms a cycle and is excluded. Straight connected rows of three hazards are permitted. The 52, 104 or 196 legal layouts respectively are equally likely; one is 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.
Explore the free Open Circuit demo and its exact conditional cell odds.
