App Download and Source Verification
This guide does not provide a verified 3xx APK. A matching name alone does not establish a package publisher or its relationship to this demo. Check the actual publisher and a primary source before treating a download as official. The browser demo has no installer, account login or payment flow.
No Three Square: Game Mechanics
The demo features the 'No Three Square' game. A 4x4 board is drawn uniformly from all configurations satisfying the support rule: no contiguous 2x2 square has exactly three mines. Safe reveals condition this legal-board support. After any safe path, the gross cashout is 96% of captured stake times initial support size divided by current compatible support size. Known-certain mines are disabled. Any safe reveal exceeding the 1000x stake cap is disabled, and the quote is automatically banked when no eligible reveal remains.
Wallet and Persistence
The wallet starts with 1000 virtual coins. A manual idle-only restoration sets the balance to exactly 1000 when below 10, preserving fractional carry. Settled balance persists locally, including zero. An unfinished round ends on reload without refund. Fractional carry persists across settlement, refill, and reload. The demo has no account login or payment flow.
Storage and Privacy
Browser localStorage is used for settled demo balance and fractional carry. This does not establish anonymity or exclude other processing. The template declares a Google Fonts stylesheet; actual browser request capture is pending. Clearing cached files may leave local storage where it is actually used. Terms explain this guide's scope, not an outside company's policies.
Responsible Use
The intended audience is 18+. This is a guide policy, not a claim about local law or an implemented age gate. Responsible use includes optional pauses, personal time/virtual-coin limits, and finding appropriate local qualified help. The demo does not clinically train behavior or make losses safe.
Simulation and Math Evidence
Simulation measurements are supporting sample observations, not the mathematical payout law. Exact expected values are distinct from measured estimates. For example, with 3 mines, policy 0, the exact gross RTP is 0.96, measured RTP is 95.9676348056872%, with a gross multiplier of 1.192037914691943. With 3 mines, policy 5, the exact gross RTP is 0.96, measured RTP is 95.81714285714284%, with a gross multiplier of 503.03999999999996. Mode distributions differ; expected RTP is not a promised session result.
Frequently asked questions
Is this the official 3xx app?
The app identity is unverified unless confirmed by a reviewed primary source. This demo is independent and does not certify any outside product.
How do I refill my balance?
A manual idle-only refill sets the balance to 1000 when below 10, preserving fractional carry. There is no automatic replenishment.
Does the demo track my personal data?
Storage uses browser localStorage for balance and carry. A Google Fonts stylesheet is declared, but request capture is pending. Anonymity is not guaranteed.
