Standard Fillomino rules apply ie divide the grid into orthogonally connected regions; each cell must contain a number equal to the number of cells in its region; no two regions of same size may share an edge. Hybrid Cave rules apply ie Some of the cells are to be shaded gray, so that all gray cells (the walls) are orthogonally connected to the edge, and all remaining cells form an orthogonally connected area (the cave); in an orthogonally connected area of gray cells, no numbers may repeat; each cell marked with a large circle is inside the cave, and its number indicates how many cave cells can be seen from it orthogonally (including the cell itself), given that walls obstruct the view; the top right cell is given as part of the wall, and therefore shaded gray from the start; it still needs a number in it.