The demo described here is a self-contained virtual-coin experience owned by this guide. It uses specific mathematical rules for the Row Unique Nonempty game mode. Results in this demo do not guarantee outcomes on any external platform.
Identity and Scope
The queried name 39H appears in the context of a gaming or entertainment interface, but no authoritative source has been reviewed to confirm its legal entity status, registration number, or official headquarters. References to "39h.info" or similar domains are treated as navigational aids, not proof of corporate identity.
This guide operates independently. It does not endorse, certify, or reproduce the external product. Any affiliation, licence, or bonus structure mentioned in external sources is not verified by this guide.
Game Mechanics: Row Unique Nonempty
The board has four rows and four columns. Choose 3, 4 or 5 mines. Empty rows are allowed and may repeat. Only the nonzero four-bit row patterns must be distinct. The legal-board counts are 400, 1,264 and 2,928 respectively. Every board in the selected legal set has equal probability; the sampler uses cryptographic 32-bit draws with rejection to avoid modulo bias.
After safe reveals, only boards consistent with those safe cells remain. The gross quote is 0.96 times the captured stake times the initial board count divided by the remaining count.
Wallet and Persistence
The initial integer wallet is 1,000 virtual coins. When idle with an integer balance below 10, manual refill sets that integer balance to 1,000 while retaining fractional carry. Settlement adds the saved carry to the gross return, credits the whole-number portion and stores the remainder. Balance and carry persist in this browser, including a zero balance. Reloading an unfinished round keeps its stake deducted and ends it without refund, return or resume.
Mathematical Evidence and RTP
Gross quote = 0.96 × captured stake × initial legal-board count ÷ current compatible-board count. Gross includes the returned stake and is not net profit. Exact expected gross RTP is 96%, not a guaranteed session result. Simulation percentages are observations: for example, the saved 3-mine first-cell sample measured 95.94% over 1,000,000 rounds. Rounded examples below are for readability and do not change the exact formula.
The exact gross RTP for Row Unique Nonempty is 0.96 across all modes. Simulation measurements provide supporting observations but are not the mathematical payout law.
| Mines | Policy | Exact Gross RTP (ratio) | Measured RTP (%) | Gross Multiplier |
|---|---|---|---|---|
| 3 | 0 | 0.96 | 95.9376 | 1.1815 |
| 3 | 1 | 0.96 | 95.9925 | 1.7778 |
| 3 | 5 | 0.96 | 96.3672 | 384 |
| 4 | 5 | 0.96 | 95.8594 | 606.72 |
| 5 | 5 | 0.96 | 95.5371 | 702.72 |
Note: Measured RTP values are based on 1,000,000 to 30,000,000 rounds and may vary slightly from the exact 0.96 expectation due to sampling.
Privacy and Data
The demo stores its wallet balance and fractional carry in browser localStorage. This is local persistence, not an assurance of anonymity or an inventory of all data processing. The template declares Google Fonts, and the production builder declares Statinside visitor analytics counter 44. These declarations do not establish server retention or what every request contains; actual browser capture is pending. Clearing cached files alone need not remove localStorage. Use the browser settings for this site’s stored data to remove it.
Responsible Use
The 18+ label is this guide’s audience policy, not an implemented age gate or a statement of local legality. You may choose breaks and personal time limits outside the interface. The demo provides no pause button, enforced timer, coin-limit setting or self-exclusion control. Game caps and virtual refills do not guarantee safe behaviour.
Frequently asked questions
Is 39H a verified licensed operator?
No. Unless a specific fact is explicitly accompanied by a reviewed primary source, the identity of 39H remains unverified. This page does not establish an official company, licence, or regulatory status.
How does the wallet refill work?
A manual refill while idle and below 10 virtual coins sets the balance to exactly 1000. It preserves fractional carry. There is no automatic replenishment or deposit flow.
What is the exact RTP for Row Unique Nonempty?
The exact gross RTP is 0.96 (96%). Measured RTP values from simulations (e.g., 95.93% to 96.36%) are supporting observations and may vary based on sample size.
