Corners and edges

Level: Basic

Tackle the border, where cells have fewer neighbors, first.

A corner cell has only 3 neighbors and an edge cell only 5. With fewer possibilities to weigh than a central cell (8), they're easier to confirm.

The number arrangements that appear along an edge in particular show their patterns (1-1, 1-2, and so on) clearly, so you can quickly narrow down mine positions using the wall as a reference.

When you get stuck, shift your gaze to the border. Because a wall cuts off the possibilities on one side, problems that wouldn't resolve in the center often become certain along the edges.

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