Independent guide
This independent KM 23 guide supplies its own free Edge Span 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.
External claims
A matching brand, professional design, search result or HTTPS connection does not verify ownership, authorisation or safety. Match any claim against an independent regulator register, including entity, current status, scope and listed domains. No operator licence or service is endorsed here.
Own game and external catalogue
Edge Span is this site’s own constrained-layout game. No Leongto commercial catalogue, operator identity, external game, licence, app or payment service has been authenticated. This game’s return does not establish any external odds.
Left and right, not top and bottom
Choose 3, 4 or 5 hazards on a 4×4 board. Hazards must touch both the left and right edges, while they must not touch both top and bottom edges together. Touching only the top, only the bottom, or neither is allowed. All 124, 475, 1048 legal layouts respectively are equally likely and remain fixed during a round. Connectedness is not required.
Frequently asked questions
Is this an operator website?
This independent KM 23 guide supplies its own free Edge Span 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 edge constraints?
Choose 3, 4 or 5 hazards on a 4×4 board. Hazards must touch both the left and right edges, while they must not touch both top and bottom edges together. Touching only the top, only the bottom, or neither is allowed. All 124, 475, 1048 legal layouts respectively are equally likely and remain fixed during a round. Connectedness is not required.
Can hazards touch the top edge?
With 3 hazards, A1, B2 and A4 is legal: it touches left, right and top, but not bottom. A1, B2 and D4 is illegal because it touches both top and bottom. B1, B2 and C4 is legal without touching top or bottom. Visible edge conditions constrain a complete layout, not a guaranteed safe cell.
Explore the original free Edge Span Mines demo.
