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Tapa (Transparent) (923)
Instruction:
Shade some empty cells black (unlike regular Tapa, cells with numbers can be shaded). All black 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 squares can be entirely shaded black.
Numbers in a cell indicate the sizes of all orthogonally-connected black cell regions within the "block" of cells that includes all cells touching the numbered cell and the cell itself (usually 9 cells, but fewer at the edges). 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 can be shaded black.