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Tapa (Black Holes) (1151)
Instruction:
Shade some empty cells; cells with given numbers cannot be shaded. All shaded cells connect along edges to create a single connected region. (It is permissible for the region to touch itself at a corner, but touching at a corner does not connect the region.) No 2×2 group of cells can be entirely shaded.
Also, place a "black hole" (circled number) into some cells in the grid, no more than one black hole per cell. Each row and each column must contain exactly the set of black holes specified above and to the right of the grid. Every black hole must be in a shaded cell.
Numbers in a cell indicate the lengths of contiguous shaded cell groups along the "ring" of 8 cells touching that cell (fewer for cells along the outside edge). If there is more than one number in a cell, then there must be at least one white (unshaded) cell between the shaded cell groups. The numbers are given in no particular order. As a special case, if the number given in a cell is a zero (0), it means that none of the cells around that cell can be shaded.
A black hole "distorts space" and counts as its "mass" (the number in the circle) for purposes of calculating length for numbers in a cell (instead of 1). All black hole masses will be at least 2.