Logic Masters Deutschland e.V.

This Friday I will post a 15x15 Cave/Akari hybrid. This is a teaser to get a bit of a feel for it.

Cells have to be shaded to create cave walls, such that these walls are orthogonally connected to the edges of the grid. The unshaded cells (the cave) need to remain orthogonally connected to each other to be able to traverse the cave. The cave also needs to be fully lit up, so lightbulbs need to be placed throughout the cave. Lightbulbs light up the cave in each orthogonal direction until a wall is reached. Two lightbulbs are not allowed to see each other.

Every clue in the grid is either a Cave (unshaded) or an Akari clue (shaded). Cave clues indicate how many cave cells it sees in orthogonal directions, including itself. Akari clues are part of the wall and indicate how many lightbulbs are orthogonally adjacent to the clue.

An example of what a finished grid could look like is shown below. Orange cells are lightbulbs.

Solve on Penpa