This guide provides the exact mechanics, score function, and wallet behavior for the original demo. No external catalogue is verified.
Board Support & Probability
The game uses a 4x4 grid. The mine count choices are restricted to exact nonempty support configurations found in the source. The board is not drawn from all possible combinations but uniformly from the "legal-board support" for the selected mine count.
After each safe reveal, the support set is filtered. The probability of a cell being safe is conditional on the remaining compatible boards. Cells with zero conditional safe probability are disabled.
What Malaysian Players Should Check
Before playing the 3xx demo in Malaysia, verify how the operator handles local currency and payments. While the game uses virtual coins, check if real-money versions support MYR (Malaysian Ringgit). Confirm which payment methods are accepted, such as Touch 'n Go eWallet or DuitNow, by visiting the operator’s payment page. Note that gambling is tightly restricted by national law in Malaysia, so ensure you are of legal age and playing responsibly.
- Check if the operator lists MYR as a supported currency.
- Verify if Touch 'n Go eWallet or DuitNow are available for deposits.
- Confirm the operator’s licensing status, as Malaysia’s gambling laws vary by state and operator.
Score Function & Payout
The gross payout is determined by the reduction in the support set. The formula is:
| Component | Value |
|---|---|
| Gross Quote | 0.96 × Captured Stake × Initial Support Count / Current Compatible Support Count |
The exact gross RTP is 0.96 across all modes. Measured RTP varies slightly due to sample size but converges to this value.
Stopping Rules & Cap
A round ends in one of three ways:
- A mine is revealed (gross return is zero).
- You manually bank after at least one safe reveal.
- No eligible cells remain (automatic banking).
A 1000-times-stake cap is enforced. If a safe reveal would exceed this cap, that action is disabled. The current quote is automatically banked only when no eligible cell remains or all safe cells have been revealed. Manual bank becomes available only after at least one safe reveal.
Controls & Modes
Stake, mine-count and refill controls are locked during an active round; eligible cells and banking after a safe reveal remain available. You cannot change the stake or mine count. Sound remains available. There is no auto queue. The refill button is available only while idle and below a balance of 10.
Wallet & Persistence
The demo wallet persists locally. Fractional carry is preserved across settlement, refill, and reload. If you refill while idle and the balance is below 10, the balance is set to exactly 1000. An unfinished round ends on reload without refund or resume. Virtual coins have no cash value.
Mathematical Evidence
The following table shows exact gross RTP and measured RTP for various mine counts and safe paths. Note that measured RTP is an estimate based on simulation rounds.
| Mines | Safe Path | Exact Gross RTP | Measured RTP | Gross Multiplier |
|---|---|---|---|---|
| 3 | [0] | 0.96 | 95.9676 | 1.1920 |
| 3 | [0,1,2] | 0.96 | 95.9644 | 1.9274 |
| 3 | [0,3,6,9,12,15,2,5,8,11,14,1,4] | 0.96 | 95.8171 | 503.04 |
| 5 | [0,3,6,9,12,15,2,5,8,11] | 0.96 | 95.5991 | 802.56 |
Frequently asked questions
How is the board drawn?
The board is drawn uniformly from all legal boards satisfying the constraint that no contiguous 2x2 square has exactly three mines. It is not a random selection from all possible 4x4 boards.
What happens if I reload the page mid-round?
The unfinished round ends without refund or resume. The settled balance and fractional carry are preserved, but the current game state is lost.
Can I auto-bank?
There is no user-selectable automatic banking mode. Manual banking is available after a safe reveal. The game automatically banks the current quote when all safe cells have been revealed or no eligible cell remains. One disabled above-cap cell alone does not end the round.
Is 3xx legal in Malaysia?
Gambling is tightly restricted by national law in Malaysia. While online gambling exists, its legality depends on the specific operator and state regulations. Always check the operator’s terms and ensure you are playing responsibly as an adult.
Can I use Touch 'n Go or DuitNow for 3xx?
This depends on the operator. Check the payment section on the operator’s website to see if they accept Touch 'n Go eWallet or DuitNow for deposits. The demo game uses virtual coins, so real-money payment methods may not apply here.
