The game uses a 4×4 board with printed labels 1–16. Players select 3, 4, or 5 hazards based on a unique condition: the sum of the greatest common divisor (gcd) of all hazard pairs must be a perfect square. Payouts are calculated using exact posterior probabilities and a gross return cap.
Game Mechanics and Rules
The game is played on a 4×4 board with labels 1 through 16 in row-major order. Before each round, you must select the number of hazards: 3, 4, or 5.
- Support Selection: Only complete subsets of labels are sampled uniformly that satisfy the condition: the sum of gcd(label_i, label_j) over all unordered hazard pairs is a perfect square.
- Revealing: You reveal eligible cells one by one; a hazard ends the round with zero return. Each safe observation filters the remaining finite support. The initial gross value is quoted at 97% of the captured stake.
- Pricing: Each successful safe reveal divides the current gross value by its exact posterior safe probability. If the exact safe probability is 1, the value remains unchanged.
- Collection: You may collect after at least one safe reveal. You cannot collect at the start.
- Auto-Bank: The system automatically banks (collects) only when no eligible uncertain choice remains.
What Philippine Players Should Check Before Playing TBBB
While this demo uses virtual coins, the real TBBB platform may operate differently for players in the Philippines. You must verify if the operator accepts Philippine Peso (PHP) as the primary currency. This avoids unnecessary conversion fees when you eventually deposit real money. Additionally, check which local payment gateways are supported. Popular options in the Philippines include GCash and Maya, but you need to confirm if TBBB integrates these directly or requires third-party e-wallets.
Regulatory safety is crucial. The Philippine Amusement and Gaming Corporation (PAGCOR) is the national regulator. You should check if TBBB holds a valid PAGCOR license or operates under a recognized offshore jurisdiction that accepts Filipino players. Always verify the license number on the operator's official site.
- Confirm if the main site supports PHP deposits and withdrawals.
- Check for GCash or Maya integration in the cashier section.
- Verify the PAGCOR license status directly on the operator's page.
- Ensure you are at least 18 years old before playing.
Controls and Modes
The demo supports the following controls and modes:
- Stakes: Selectable stakes are 10, 20, 50, or 100 play coins. The default stake is 20.
- Hazard Count: Choose 3, 4, or 5 hazards before the round begins.
- Locking: Settings, restoration, and starting another round are locked while a round is active.
- Collection: Collect after at least one safe reveal.
Payout and Settlement
One captured stake per round. At settlement, the floor of (raw gross return + stored fractional carry) is credited to your balance. The remainder persists as fractional carry.
- Zero-return rounds leave the fractional carry unchanged.
- Cap: Individual choices with a gross return above 1000× the stake are disabled. Equality (exactly 1000×) is allowed.
Wallet and Persistence
This demo uses a local browser wallet. Virtual coins have no cash value and do not require a deposit or account.
- Initial Balance: 1000 play coins.
- Restoration: A manual idle-only restoration sets the balance to exactly 1000 when the balance is below 10 and you are idle. This does not add coins; it resets the balance.
- Fractional Carry: Persists in browser localStorage across settlement, refill, and reload. Refilling does not clear it.
- Settled Balance: Persists locally, including zero.
- Unfinished Round: If you reload during an unfinished round, the captured stake remains deducted. The round ends without refund, payout, continuation, or resume.
- Controls After Reload: Default stake 20 and the first preset are restored.
The deployed guide loads Google Fonts and the Statinside44 counter script and sends visit-counter requests. The absence of login does not establish that no personal data are processed.
Mathematical Evidence and RTP
The following table shows the expected RTP (Return to Player) and measured RTP from simulation data. Expected RTP is not a promised session result.
| Hazards | Policy | Expected RTP | Measured RTP | Support Count |
|---|---|---|---|---|
| 3 | low-1 | 97% | 97.0133% | 144 |
| 3 | high-2 | 97% | 97.0956% | 144 |
| 3 | first-4 | 97% | 96.9050% | 144 |
| 4 | low-1 | 97% | 96.9772% | 342 |
| 4 | high-2 | 97% | 97.1247% | 342 |
| 4 | first-4 | 97% | 96.8795% | 342 |
| 5 | low-1 | 97% | 97.0125% | 318 |
| 5 | high-2 | 97% | 97.1654% | 318 |
| 5 | first-4 | 97% | 97.0981% | 318 |
Example Scenario
Example with 3 Hazards:
- Hazards: 3
- Support Count: 144
- Printed Label: 3
- Posterior Safe Probability: 0.8611111111111112
- Initial Gross at Stake 20: 19.4
- Gross After Safe Reveal: 22.529032258064515
Frequently asked questions
Is this demo affiliated with an external casino or operator?
No. This is an independent guide's original demo. It does not certify or reproduce any outside product, nor does it have a cashier, deposit, or login flow.
How does the wallet work?
The wallet is local to your browser. It starts with 1000 coins. If your balance drops below 10 while idle, you can manually restore it to exactly 1000. Fractional carry persists in local storage across reloads. Unfinished rounds do not refund on reload.
What is the RTP for Pair Gcd Square Mines?
The expected RTP is 97% across all modes (3, 4, or 5 hazards). Measured RTP from simulations ranges from approximately 96.88% to 97.17% depending on the specific policy and hazard count, but this is not a guaranteed session result.
Is the TBBB demo free for players in the Philippines?
Yes, this demo uses virtual coins and is completely free. It is not affiliated with the official TBBB operator, so no real money or PHP deposits are required to play here.
Does TBBB support GCash or Maya for Philippine users?
This depends on the operator. You must check the 'Cashier' or 'Banking' section on the official TBBB website to see if GCash, Maya, or other local Philippine payment methods are currently supported.
