Logic Masters Deutschland e.V.

Originally published as part of Sudokuvania: Digits of Despair.

Rules:

Sudoku - place digits from 1-9 into each cell without repeating in a row, column, or 3x3 box.

Cave - Shade some cells such that any orthogonally-connected group of shaded (WALL) cells connects to an edge of the grid, and all unshaded (CAVE) cells form a single orthogonally-connected area.

Akari - Place lanterns in unshaded cells such that the unshaded cells must all be illuminated by lanterns, and no two lanterns may illuminate each other.
Illumination propagates in straight orthogonal lines and is blocked by shaded cells.

Lanterns - Cells with cages are all WALL cells. The digit in the cage indicates the number of lanterns in cells orthogonally adjacent to it.
In addition, the digit in each lantern is the number of cells illuminated by that lantern (including itself).

Play the puzzle on Sudokupad

I hope you enjoy the puzzle! :-)