The rules below describe the implemented board, probability calculations and wallet. They do not establish rules or services of a similarly named outside platform.
Scope and Identity
This independent guide does not establish an outside operator, licence, app or official business address for the queried name Sp777. Its browser demo does not certify or reproduce an outside product.
The demo has no account login, deposits, withdrawals, account recovery or network-synchronised wallet.
The Virtual-Coin Demo
A new wallet starts with 1000 play coins. One stake is deducted when a round starts, and the resulting balance is saved locally. When idle with fewer than 10 coins, you may restore the balance to exactly 1000. This sets the balance rather than adding coins. Fractional payout carry survives settlement, restoration and reload. Reloading an unfinished round gives no refund, payout or continuation; the controls reset to stake 20 and the first mode.
Play coins have no cash value. The demo has no account-login or payment flow.
Data and Privacy
Your play-coin balance and fractional payout carry are saved in browser localStorage. The page requests Google Fonts resources and sends a visit-counter request to Statinside44. These network requests are separate from the local wallet. The absence of login or payment controls does not establish anonymity or an absence of personal-data processing.
Clearing cached files alone may leave localStorage intact; use browser site-data controls to remove the saved wallet. This guide does not promise third-party retention periods or encryption guarantees.
Responsible Use
This guide has an 18+ intended audience. This is an audience policy, not age verification or a statement of local legality. You can choose breaks and personal time or play-coin limits. The demo has no enforced timer or account self-exclusion. Closing an unfinished round leaves its stake deducted.
Game Mechanics Summary
Pair Lcm Congruence Mines uses a 4×4 board with labels 1..16. Players select 3, 4, or 5 hazards from a uniform sample of complete subsets where the sum of the least common multiple of the two labels over all unordered hazard pairs is divisible by 11.
- Scoring: Initial quoted value is 97% of captured stake. Each uncertain successful reveal divides current gross value by its exact posterior safe probability. Probability 1 reveals leave it unchanged.
- Stopping: Collect after at least one safe reveal. Choices with gross > 1000×stake are disabled; equality is allowed. Bank automatically only when no eligible uncertain choice remains.
- Payout: At settlement, the integer part of the sum of raw gross return and stored fractional carry is credited; remainder persists. Zero-return rounds leave fractional carry unchanged.
Mathematical Evidence
The following table shows the expected RTP (97%) and measured RTP from simulation measurements for various hazard counts and policies. Simulation measurements are supporting sample observations, not the mathematical payout law.
| Hazards | Policy | Expected RTP | Measured RTP | Support Count |
|---|---|---|---|---|
| 3 | low-1 | 97% | 96.99999999799013% | 53 |
| 3 | high-2 | 97% | 97.07315292235253% | 53 |
| 3 | first-4 | 97% | 96.88802042820117% | 53 |
| 4 | low-1 | 97% | 96.98268851115957% | 181 |
| 4 | high-2 | 97% | 96.93179339011823% | 181 |
| 4 | first-4 | 97% | 97.19006543765255% | 181 |
| 5 | low-1 | 97% | 96.85421077596573% | 379 |
| 5 | high-2 | 97% | 96.92278485142836% | 379 |
| 5 | first-4 | 97% | 96.98514751338294% | 379 |
Frequently asked questions
Is Sp777 an official casino operator?
This independent guide does not establish an outside operator, licence, app or official business address for the queried name Sp777. Its browser demo does not certify or reproduce an outside product.
How does the virtual-coin wallet work?
The demo starts with 1000 coins. If idle and balance is below 10, manual restoration sets it to exactly 1000. Fractional carry persists in localStorage. Reloads during active rounds do not refund or resume the round.
What data is stored locally?
The wallet saves play-coin balance and fractional carry in localStorage. The page also requests Google Fonts and a Statinside44 visit counter. These observations do not establish anonymity.
