Independent query guide
This independent XOTOTO guide supplies its own free Even Coordinates Mines demo. Operator identity, domains, licence, apps, payments, support and commercial game equivalence have not been independently verified. No operator account or commercial link is supplied here.
Two even coordinate sums
Choose 3, 4 or 5 hazards on a 4×4 board. Number rows and columns from 0 to 3, top to bottom and left to right. Add the row indices of all hazards and, separately, their column indices. Both sums must be even. Individual indices need not be even, and this does not require an even hazard count in every row or column. All 140, 476 or 1092 legal layouts respectively are equally likely; one stays fixed throughout the round.
Expected return
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.
Technical data
There are no account, payment or identity-document forms here. Fonts, the visit counter, server and CDN requests can expose technical data including IP and browser details. Complete anonymity, third-party data use and cookie lifetimes are not established. Clearing cache alone may leave localStorage intact.
Own-site rules
These rules describe only this original virtual game. This guide does not determine legal availability of an external service, certify its fairness or promise income. The own-site 18+ restriction is not a statement about every jurisdiction’s legal age.
Frequently asked questions
Is this an operator website?
This independent XOTOTO guide supplies its own free Even Coordinates Mines demo. Operator identity, domains, licence, apps, payments, support and commercial game equivalence have not been independently verified. No operator account or commercial link is supplied here.
What are the coordinate sum rules?
Choose 3, 4 or 5 hazards on a 4×4 board. Number rows and columns from 0 to 3, top to bottom and left to right. Add the row indices of all hazards and, separately, their column indices. Both sums must be even. Individual indices need not be even, and this does not require an even hazard count in every row or column. All 140, 476 or 1092 legal layouts respectively are equally likely; one stays fixed throughout the round.
How is value calculated?
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.
Which coordinate example is legal?
With 3 hazards, A1,A2,A4 has row-index sum 0 and column-index sum 0+1+3=4, so it is legal. A1,A2,A3 has column sum 3, so it is illegal. Sum parity constrains the complete layout; visible coordinates do not show whether a particular cell is hazardous.
When can I collect?
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.
Explore the original free Even Coordinates Mines game.
