TK77: Game Rules for India

No authenticated commercial catalogue

No external TK77 commercial catalogue, providers, licence or game equivalence is authenticated. Contour Pairs is this guide’s original Mines game with exactly one orthogonal hazard pair over the entire board. Its demo is not a trial of an external service.

What Indian Players Should Check

Before diving into the demo, Indian users should verify key details. First, confirm if TK77 supports INR for real-money versions and which payment gateways like UPI, Paytm, or PhonePe are active. Second, check your state’s gambling laws, as regulations differ across India. Third, look for responsible gaming tools on the operator’s site.

• Verify currency support and payment methods like UPI or Paytm directly with TK77.
• Check local state laws regarding online gaming legality.
• Ensure you are of legal age to gamble in your jurisdiction.
• Review the operator’s terms for fair play and dispute resolution.

Exactly one orthogonal hazard pair

Choose 3, 4 or 5 hazards on a 4×4 board. Exactly one unordered pair of hazards shares a horizontal or vertical edge across the entire board. Diagonal contacts do not count. All other hazards have no orthogonal hazard neighbour. All 232, 768 or 1064 legal layouts respectively are equally likely; one stays fixed throughout the round.

Initial and updated safe probabilities

With 3 hazards, an initial corner is safe in 192 of 232 layouts, an edge cell away from a corner in 187 of 232, and a centre cell in 188 of 232. From a 20-coin stake a safe corner gives 20×0.97/(192/232), about 23.442 coins; a safe centre gives about 23.940 coins. Observations update compatible layouts, so later probabilities may rise or fall. Initial odds are not uniformly 13/16.

Exact conditional value

Live value starts at 0.97 times the virtual stake. A safe reveal divides it by that cell’s exact conditional safe probability among the remaining compatible legal layouts. A hazard ends the round with zero return. Reveals change knowledge, not the hidden layout.

Collect and eligible choices

Collect is available after a safe reveal. Proven hazards are unavailable; proven-safe cells have probability 1 and add no value. A choice with next value above 1000 times stake is unavailable. When no eligible uncertain choice remains, the current value is banked automatically. The guard is not a promise that 1000×stake can be reached.

Expected return and variance

Exact expected return is 97% for permitted stopping policies. The initial 3% reduction is applied once; conditional safe-branch compensation preserves expectation. Choosing coordinates or stopping changes risk and variance, not this expectation. A short session is not guaranteed to match it.