Based on user477343's Find the Path puzzle I have produced a slightly larger puzzle based on a similar mechanic. Goal is as follows:
- Draw a continuous path between the two red dots.
- The path must follow the edges of the marked grid (including the blue outside edges).
- The path cannot trace any edge more than once and must not cross itself, but it may intersect with itself at any corner.
- The numbers in each square in the grid show the number of edges of each square that must be followed by the path.